Description: The Gwydir FMP boundary was initially based on the Lower Gwydir designated floodplain (designated under the Water Act 1912 on the 18th October 1984). The boundary was refined to consider water sharing plans, floodplain harvesting works and aligned to topographical features where applicable for ease of administration and clarity for water users.The Gwydir Valley FMP commenced on the 12 August 2016.Detailed description of how the boundary was developed:Principles for Developing VWFMPThe current designated floodplain (WA 1912) was the starting point for the development of a newVWFMP boundary, to ensure consistency with current management that includes areas of existingand potential new floodplain development in the Gwydir. In order to achieve the purpose andobjectives for this Plan as listed above, the designated floodplain was varied according to theprinciples detailed below.Existing designated Gwydir floodplain: Existing designated floodplain areaused to determine the area of the valleyin which Part 8 of the Water Act 1912currently applies.Basis for capturing existing and potential floodplaindevelopments within the Gwydir Valley.Hydrological Effect: The boundary will include additionalflood control works that are outside theexisting designated floodplain area.To meet the objectives of the plan and to assistcoordination of all flood control workdevelopment on the floodplain.Ease of administration.Cadastral Relevance: Where appropriate the boundary willalign with significant cadastral features.Ease of administration.Provides clarity for water users.Planning Legacy: Unregulated WSPs: Where appropriate the boundary willalign with relevant unregulated watersource boundaries.Consistency with other boundaries for watermanagement plans under the WMA 2000.Ease of administration.Clarity for water users.Planning Legacy: Regulated WSPs: Where appropriate the boundary willalign with relevant floodplain harvestingboundaries contained in regulatedWSPs of the Barwon-Darling.The location of flood works used to capturewater for floodplain harvesting is includedwithin the boundary of the valley in which thepoint of take has been accounted, or;the point of take is located within the valley inwhich the associated floodplain harvesting hasbeen accounted.Floodplain Harvesting:Boundary will be aligned to includeareas identified through the FloodplainHarvesting Project’ register of interestprocess and potential floodplainharvesting structures. To ensure consistency with the FloodplainHarvesting (FPH) Policy. The FPH Policy onlyapplies to floodplain harvesting activities onproperties where all or part of that property lieswithin the designated floodplain.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: OEH Healthy Floodplains Unit in conjuction with DPI, Water.
Description: Management Zone A (Major discharge areas for design floods):Zone A includes floodways that convey significant floodwater discharge during small (2004) and large (2012) design floods. This zone is also important for the conveyance of floodwater to floodplain assets during large and small flood events (environmental flow releases).Uncontrolled flood work development in this zone may have a high adverse impact on flood behaviour.Delineation of this zone also has socioeconomic benefits. Limiting flood work development in this zone will prevent flood flow redistribution, increased flood velocities and flood levels which may adversely impact on life and property.Zone A ensures that there is continuity of flow and flowpaths and assists in maintaining the overall flow distribution on the floodplain.Management Zone B (Flood storage and discharge areas for design floods)Zone B includes areas of the floodplain that are important for the temporary storage of floodwaters during the passage of a flood. The outer boundary of this zone is defined by the inundation extent of the large design flood.Zone B is important for conveyance of flood water to floodplain assets during larger flood events, such as in the large design flood.Controlling flood work development in this zone is important to manage the cumulative and local impact of works on flood behaviour.Management Zone C (Flood fringe areas for floods greater than design floods and existing developed areas) Zone C includes areas outside of the inundation extent of the large design flood and existing developed areas.Flood work development in the remaining flood fringe areas is unlikely to have a significant effect on the flood behaviour. Flood works would still require an assessment and approval to protect the health of the floodplain environment.Management Zone D (Special environmental protection zone) Zone D is an environmental protection zone taken from the Lower Gingham FMP. This zone includes a core wetland area that is highly significant. The inclusion of this zone in the Gwydir FMP is to ensure consistency with the existing floodplain management planning arrangements and flood connectivity to this area is maintained and protected.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: OEH Healthy Floodplains Unit and OEH Waters, Wetlands and Coasts Science Branch and OEH Native Vegetation Information Science Branch
Description: Priority vegetation assets to inform development of the Gwydir Valley Floodplain Management Plan 2016. Composite vegetation map derived from: Refer to XX field in attribute table for source data: 1. NSW Office of Environment and Heritage (2013) Gwydir Valley-Wide Floodplain Management Plan: Flood Behaviour Investigation. Report prepared for the Healthy Floodplains Project. Unpublished report. 2. • Bowen, S and Simpson, S. L. (2010). Changes in the Extent and Condition of the Vegetation Communities of the Gwydir Wetlands and Floodplain 1996-2008. Final Report for the NSW Wetland Recovery Program. NSW Department of Environment Climate Change and Water, Sydney. (Gwydir Wetlands 2008. VIS Dataset ID: 3922). 3. Eco Logical Australia (2008). Vegetation Mapping for the Namoi and Border Rivers-Gwydir CMAs: Compilation of API Datasets and Preparation of a Hierarchical Vegetation Classification. Final Report for Border Rivers-Gwydir and Namoi CMAs. Project Nos. 125-002 & 129-002. March 2008. (brg_comp09. VIS Dataset ID: 3801). 4. NSW Office of Environment and Heritage (2015). BRG-Namoi Regional Native Vegetation Mapping. Technical Notes, NSW Office of Environment and Heritage, Sydney, Australia. (BRG Namoi v2. VIS Dataset ID: 4204).
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: NSW Office of Environment and Heritage, Healthy Floodplains Unit in conjuction with the Department of Primary Industries, Water.
Name: Barwon-Darling Valley Floodplain Boundary 2017
Display Field: NAME
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Barwon-Darling Valley Floodplain Boundary. The area within the boundary is declared to be a floodplain under the Water Management (General) Regulation 2011.The upstream limit of the floodplain is at Mungindi on the Barwon River, at the New South Wales (NSW), Queensland border and the downstream limit is approximately 20 km downstream of Louth on the Darling River. The northern boundary and part of the southern boundary of the floodplain are confined to higher ground and include a limited extent of contributing influence streams. The remaining parts of the southern boundary are aligned to boundaries of other rural floodplain management plans.The boundary of the Barwon-Darling Valley Floodplain was delineated based on the consideration of the following:Designated floodplains and floodplain development guidelinesExisting and potential floodplain developments in the Barwon-Darling Valley Floodplain were identified from the following existing floodplain areas designated under Part 8 of the WA 1912: Bogan River Confluence to Louth designated floodplain, rural flood study (URS 2009)Lower Macquarie designated floodplainLower Macintyre designated floodplainSmall sections of the Lower Gwydir and Lower Namoi designated floodplainsLittle Bogan River to Yanda Creek floodplain guidelines (WRC 1986a), andDarling River – Yanda Creek to Louth floodplain guidelines (WRC 1986b.The WA 1912 was repealed in 2015 and all existing designated floodplains under this Act transitioned across to the WMA.Hydraulic effects of developmentThe floodplain was extended to include additional flood works that were outside the existing designated floodplain areas to meet the objectives of the Barwon-Darling Valley FMP and to assist with the coordination of all flood works across the extent of major flooding.Cadastral and administrative relevanceWhere appropriate, the floodplain was aligned with significant cadastral features (e.g. property, parish, county, LGA and State boundaries; roads and railways) to simplify administration and to provide clarity to water users.Planning legacy (unregulated water sharing plans (WSPs))Where appropriate, the boundary was aligned with unregulated WSP boundaries to ensure consistency with boundaries of water management plans under the WMA, ease of administration and increased clarity for water users.Floodplain harvestingThe floodplain boundary included areas identified through the Floodplain Harvesting Project’s expression of interest process for floodplain harvesting licences and potential floodplain harvesting structures. This ensures consistency with the NSW Floodplain Harvesting Policy (NSW DPI 2013), which only applies to floodplain harvesting activities on properties where all or part of that property lies within the designated floodplain.Other FMP floodplain boundariesThe Barwon-Darling Valley Floodplain was aligned with FMP boundaries of the Border Rivers, Gwydir, Lower Namoi and Macquarie valleys to provide consistency with other water management plan boundaries under the WMA 2000.Landscape featuresWhere appropriate, the boundary was aligned with significant landscape features, such as weirs, to assist ease of administration and to provide clarity for water users.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: OEH Healthy Floodplains Unit in conjuction with DPI, Water.
Name: Barwon Darling Valley FMP Management Zones 2017
Display Field: Management_Zone
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The nature and location of the management zones in the Barwon-Darling Valley Floodplain was determined using hydraulic, ecological and cultural criteria as well as criteria to ensure the plan reflects existing floodplain management arrangements. This approach considered the impact of existing and future development on flooding in rivers and floodplains; the flood risk to life and property; the flood connectivity of floodplain assets and the social and economic impacts of restricting flood-work development. Management zones for the Floodplain Management Plan for the Barwon-Darling Valley Floodplain 2017. There are five management zones:Barwon-Darling Management Zone A: includes major drainage lines and other areas where a significant discharge of floodwater occurs during all flood events. The areas are generally characterised by high flood flow velocity and depthBarwon-Darling Management Zone B: includes areas of the floodplain that are important for the conveyance of floodwater during large flood events and for the temporary pondage of floodwaters during the passage of a flood. Its outer boundary is defined by the modelled inundation extent of the large design floodBarwon-Darling Management Zone C: includes elevated areas or areas protected by existing flood work developmentBarwon-Darling Management Zone CU: includes urban areas where there is either a flood study, a flood risk management study, a flood risk management plan, or that are protected by flood mitigation works such as town levees.Barwon-Darling Management Zone D: is a special protection zone for areas of high ecological and/or cultural significance. Criteria used to develop the management zones:MANAGEMENT ZONE AHydraulic criteriaMZ A includes major discharge areas that have a DVP of greater than or equal to 0.3 m2/s for the large design flood (1976).Floodplain connectivity was provided for by incorporating:parts of the small design flood extent (2011) and/orfloodplain areas that support tributary flows and outer floodplain floodways that have a DVP of greater than or equal to 0.10 m2/s for the large design flood (1976).Ecological criteriaMZ A includes, where there is hydraulic justification:semi-permanent wetlandconnections to/through floodplain wetland (flood-dependent shrubland wetlands) and flood-dependent forest/woodland (wetlands)tracts of floodplain land within low-lying areas bordering a watercourse that contain floodplain wetland (flood-dependent shrubland wetland) or flood-dependent forest/woodland (wetlands)key fish passage areas identified using NSW Fish Community Status and Threatened Fish Species Data - Aquatic Biodiversity Value Mapping Project (NSW DPI 2016)Cultural criteriaMZ A includes, where there is hydraulic justification:floodplain areas with Aboriginal values that are highly flood-dependent that were identified during direct community consultation with the local Aboriginal community and/or are listed on the AWIS and AHIMS databaseslocations for scarred/carved trees that are living flood-dependent vegetation that generally require frequent flooding to maintain their ecological character and cultural valuelocations for heritage sites that are flood dependent and are cultural heritage objects and places as listed on Commonwealth, state and local government heritage registers.Existing floodplain management arrangements criteriaExisting floodplain development guidelines prepared to support assessment for applications under Part 8 WA 1912 were reviewed and minor changes were made to MZ A to incorporate this historical flood behaviour information. MZ A was made congruent with the MZ A of the bordering Gwydir, draft Border Rivers, draft Macquarie and draft Lower Namoi Valley FMPs.MANAGEMENT ZONE BHydraulic criteriaMZ B includes the inundation extent of the small and large design floods and any areas protected by existing flood works that are overtopped by the large design flood.Ecological criteriaMZ B includes, where there is a hydraulic justification, flood-dependent woodland and to a lesser degree flood-dependent forest/woodland (wetlands) where there was no hydraulic justification for inclusion in MZ A. Cultural criteriaMZ B includes, where there is hydraulic justification, locations for scarred/carved trees that are living and located within flood-dependent woodland.Existing floodplain management arrangements criteriaMZ B was made congruent with MZ B of the bordering Gwydir, draft Macquarie and draft Lower Namoi Valley FMPs. MZ B includes some area of the floodplain that are enclosed by existing flood works that are designed to be overtopped during moderate to large floods. MANAGEMENT ZONE CHydraulic criteriaMZ C includes flood fringe areas of the floodplain that are outside the large design flood and areas enclosed by existing flood works that are not designed to be overtopped during flooding.Ecological criteriaThe basis of MZ C was not ecological. However, some ecological assets that have been enclosed by existing approved flood works are located in MZ C.Cultural criteriaThe basis of MZ C was not cultural. However, some cultural assets that have been enclosed by existing approved flood works are located in MZ C.Existing floodplain management arrangements criteriaExisting flood-work development identified in floodplain management guidelines were incorporated into MZ C. MANAGEMENT ZONE CUHydraulic criteriaThe basis for MZ CU was not hydraulic.Ecological criteriaThe basis of MZ CU was not ecological.Cultural criteriaThe basis of MZ CU was not cultural.Existing floodplain management arrangements criteriaMZ CU includes floodplain areas that are included within existing urban flood studies, flood risk management studies, or flood risk management plans or that are protected by flood mitigation works such as town levees.MANAGEMENT ZONE DHydraulic criteriaThe basis for MZ D was not hydraulic. Ecological criteriaMZ D includes assets that are a location of landscape feature, such as a swamp, marsh, lagoon, anabranch or billabong with a high degree of floodwater dependency, and:a high degree of habitat complexitya history of supporting a diversity or abundance or waterbird, native fish or frog populationsthe functional capacity to act as an aquatic drought refugeis susceptible to conversion or loss of flood connectivity due to flood-workrecognition in, or protected by a local, state or commonwealth environmental policy.Cultural criteriaMZ D includes areas that have a high degree of floodwater dependency, such as swamps, marshes, lagoons, billabongs, rocky bars or warrambools and have significance to the Aboriginal community, including spiritual, archaeological or resource use-values. These areas were listed on a heritage register or were a place that was recognized for its cultural significance by several senior knowledge holders in the Aboriginal community.Existing floodplain management arrangements criteriaMZ D was reviewed for consistency with existing plans, however, the basis for MZ D did not include existing floodplain management planning arrangements
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: Office of Environment and Heritage: Healthy Floodplains Unit; and Waters, Wetlands and Coasts Science Branch.
Name: Barwon Darling Valley FMP Ecological Assets 2017
Display Field: Source_VIS
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Priority vegetation assets to inform development of the Barwon Darling FMP floodplain management plan 2017. Composite vegetation map derived from Refer to Source_VIS field in attribute table for source data.1. Shultz, N., Gowans, S., and Westbrooke, M. (2014) Survey and mapping of Darling floodplain vegetation between Tilpa and Brewarrina. September 2014. Report prepared for the NSW Government – Office of Environment and Heritage by Centre for Environmental Management, Federation University Australia, Ballarat. 2. Eco Logical Australia 2015. Vegetation of the Barwon-Darling and Condamine-Balonne floodplain systems of New South Wales: Mapping and survey of plant community types. Prepared for Murray-Darling Basin Authority.’ 3. Gowans S, Milne, R, Westbrooke, M & Palmer G (2012) Survey of vegetation and vegetation condition of Toorale, Version 1-1. Unpublished report to NSW Office of Environment & Heritage. Centre for Environmental Management, University of Ballarat, Mt Helen, Victoria. 4. Hunter, J. (2010). Vegetation and Floristics of The Barwon Nature Reserve. A report prepared for the Department of Environment, Climate Change and Water (DECCW). 5. Peasley, B., and Walsh, A. (1999). Mapping Vegetation Landscapes of the NSW North Western Slopes and Plains - A Project Overview. NHT Project NW0339.97. Report to the Natural Heritage Trust and North West Catchment Management Committee, Department of Land and Water Conservation. 6. Pickard, J., and Norris, E.H. (1994). The natural vegetation of north-western New South Wales: notes to accompany the 1:100 000 vegetation map sheet, Cunnighamia, Vol. 3, 3. Department of Infrastructure, 7. Planning and Natural Resources (DIPNR) (1998a). Preclearing and Existing Vegetation Mapping of the Western Division section of Bourke Shire, Northern Floodplains Far Western NSW, Edition 3. 8. Department of Infrastructure, Planning and Natural Resources (DIPNR) (1998b). Preclearing and Existing Vegetation Mapping of the Western Division section of Brewarrina Shire, Northern Floodplains Far Western NSW, Edition 2. 9. Department of Infrastructure, Planning and Natural Resources (DIPNR) (1998c). Preclearing and Existing Vegetation Mapping of the Western Division section of Walgett Shire, Northern Floodplains Far Western NSW, Edition 3. 10. Eco Logical Australia (2008). Vegetation Mapping for the Namoi and Border Rivers-Gwydir CMAs: Compilation of API Datasets and Preparation of a Hierarchical Vegetation Classification, final report for Border Rivers-Gwydir and Namoi CMAs. 11. Bowen, S., and Simpson, S. (2009). 2008 Vegetation map for the Gwydir wetlands and floodplain. NSW Department of Environment Climate Change and Water. Sydney South NSW. 12. Office of Environment and Heritage (2016). State Vegetation Type Map: Border Rivers Gwydir Namoi. Version 2.1. Office of Environment and Heritage, Sydney, Australia. 13. Some features from NSW Hydro Area Dataset were unioned into the vegetation composite layer
Description: The Upper Namoi Valley Floodplain Boundary. The area within the boundary is proposed to be declared a floodplain under the Water Management (General) Regulation 2011.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: OEH Healthy Floodplains Unit in conjunction with DPI, Water.
Name: Upper Namoi Valley FMP Management Zones 2019
Display Field: Zone
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Managemnt zones were defined based on hydraulic, ecological, cultural and socio-economic criteria. The seven zones include:MZ AD - Major Discharge Areas, Defined FloodwaysMZ AID - Major Discharge AreasIll Defined Floodways MZ BL - Flood Storage and Secondary Flood Discharge Areas, MZ BU - Flood Storage and Secondary Flood Discharge AreasMZ C - Flood Fringe and Flood Protected Developed AreasMZ CU - Urban areas managed by Local CouncilMZ D - Special Environmental and Cultural Protection ZoneFollowing the Floodplain Management Plan, the management zones indicate what rules apply for the granting or ammendment of flood work approvals.The risk to life and property from the effects of flooding is addressed in the design of the management zones and the rules for granting or amending flood work approvals by:identifying hydraulic thresholds within management zones where the local and cumulative impact of flood work development should be limited to prevent flood flow redistribution, increased flood velocities and flood levels, anddeveloping rules to limit the granting of flood work approvals for flood works that are minor in nature, including flood protection works to protect infrastructure and livestock, in zones where major flood discharge occurs (Upper Namoi Management Zones AD, AID and D), anddeveloping rules to allow landholders to apply for certain flood protection works in Upper Namoi Management Zones BU and BL (where temporary storage of large floods occurs) without requiring advertising, to protect infrastructure, crops and livestock from flood events, andspecifying the nature of flood works that can be constructed.
Name: Upper Namoi Valley FMP Ecological Assets 2019
Display Field: PCTname
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The purpose of the ecological criteria is to ensure that ecological assets are not impacted by changes to the passage of floodwater caused by new flood works or amendments to existing flood works. Management zones based on vegetation ecological assets present include: 1) Semi-permenant wetlands requiring flooding annually or near annually as MZ AD; 2) Floodplain wetland (flood-dependent shrubland wetlands) requiring flooding every 1 to 5 years as MZ AD or AID; 3) Flood-dependent forest/woodland (wetlands) requiring water from 1 in 3 yrs to 1 in 5 yrs as MZ AD or MZ AID.
Description: The Lower Namoi Valley Floodplain Boundary, which covers 570,700 hectares, was defined to capture the floodplain areas inundated during flooding of the major rivers running between Narrabri and Walgett and to include any works that may affect flooding. The existing Lower Namoi Floodplain designated under section 166 Part 8 of the WA 1912 on 18 September 1984 was the basis for capturing existing and potential floodplain developments within the floodplain. The overall extent of boundary change when compared to the existing designated floodplain was the addition of 57,400 hectares in some areas and the subtraction of 175,600 hectares in other areas. Changes were made to the existing floodplain to delineate the new Lower Namoi Valley Floodplain boundary.Where appropriate, the boundary was adjusted to align with significant cadastral features, such as the Walgett to Pilliga Road, to ease administration and provide clarity to water users.The largest proposed change is at the northern boundary where 174,000 hectares of the existing floodplain were removed when delineating the new proposed floodplain boundary. This change was proposed to align with the wsp for the Gwydir Unregulated and Alluvial Water Sources 2012. Flood work applications in these areas are now assessed under the Gwydir Valley FMP 2016. The Floodplain Harvesting Project’s register of interest process and potential floodplain harvesting structures were also considered when delineating the proposed boundary; however, no changes were requiredThe boundary of theLowerNamoiValley Floodplain was delineated based on the consideration of the following:Designated floodplains and floodplain development guidelinesLower NamoidesignatedFloodplain The WA 1912 was repealed in 2015 and all existing designated floodplains under this Act transitioned across to the WMAHydraulic effects of developmentThe floodplain was extended to include additional flood works that were outside the existing designated floodplain areas to meet the objectives of the Lower NamoiValley FMP and to assist with the coordination of all flood works across the extent of major flooding.Cadastral and administrative relevanceWhere appropriate, the floodplain was aligned with significant cadastral features (e.g. property, parish, county, LGA and State boundaries; roads and railways) to simplify administration and to provide clarity to water users.Planning legacy (unregulated water sharing plans (WSPs))Where appropriate, the boundary was aligned with unregulated WSP boundaries to ensure consistency with boundaries of water management plans under the WMA, ease of administration and increased clarity for water users.Floodplain harvestingThe floodplain boundary included areas identified through the Floodplain Harvesting Project’s expression of interest process for floodplain harvesting licences and potential floodplain harvesting structures. This ensures consistency with the NSW Floodplain Harvesting Policy (NSW DPI 2013), which only applies to floodplain harvesting activities on properties where all or part of that property lies within the designated floodplain.Other FMP floodplain boundariesThe Lower Namoi Valley Floodplain was aligned with FMP boundaries of the, Upper Namoi,Gwydir, and Barwon Darlingvalleys to provide consistency with other water management plan boundaries under the WMA 2000.Landscape featuresWhere appropriate, the boundary was aligned with significant landscape features, such as weirs, to assist ease of administration and to provide clarity for water users.Lidar and ADS40 DEMs and floodimaery were also used to identify landscape featrues.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: OEH Healthy Floodplains Unit in conjuction with DPI, Water.
Name: Lower Namoi Valley FMP Management Zones 2020
Display Field: Management_Zone
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Used as part of the Healthy Floodplain for the Lower NamoiValleyFloodplain Management Plan(FMP).The nature and location of the management zones for the Lower Namoi Valley Floodplain was determined using hydraulic, ecological and cultural criteria as well as criteria to ensure the plan reflects current floodplain management arrangements. This approach considered the impact of existing and future development on flooding in rivers and floodplains; the flood risk to life and property; the flood connectivity of floodplain assets and the social and economic impacts of restricting flood work development. Management zones for the Floodplain Management Plan for the Lower NamoiValley Floodplain 2019.The Lower Namoi Valley FMP has 6 management zones: 1)MZ AD – Major discharge areas, defined floodways (133,700 hectares or 23% of the FMP)These areas are generally characterised by relatively high flood-flow velocity and depth (≥ 0.2 m2/s for large design flood, 1971, 4% AEP). 2)MZ AID – Major discharge areas, ill-defined floodways (21,400 hectares or 4 % of the FMP)The ill-defined floodways are major discharge areas, which are major discharge areas but where the selected depth-velocity product thresholds do not support the delineation of a defined floodway. Ill-defined floodways must have a depth velocity product of at least 0.05 m2/s for the large design flood (1971 – 4% AEP). Ill-defined floodways are the width of the upstream 3)MZ B – Flood storage and secondary flood discharge (189,600 hectares or 33% of the FMP) It is important for the conveyance of floodwater during large flood events and for the temporary pondage of floodwaters during the passage of a flood. It includes ecological assets that have a moderate level of flood dependency, and also includes cultural assets such as modified trees that are likely to only be flood connected during moderate and large floods.4)MZ C – Flood fringe and flood protected developed areas (221,800 hectares or 39 % of the FMP). MZ C also includes areas protected by flood works that are unlimited height and are not overtopped by water during moderate to large floods. The rules and assessment criteria of MZ C are less restrictive than other management zones as MZ C includes areas where flood work development is unlikely to have a significant effect on flood behaviour. Nevertheless, flood works still require an assessment and approval to protect the health of the floodplain environment.5)MZ CU – Urban areas managed by Local Council (2800 hectares or less than 1 %of the FMP)It includes parts of Narrabri and Wee Waa that are urban areas where flood risk is managed by local government authorities through flood risk management plans and studies developed in accordance with the Floodplain Development Manual (NSW Government 2005).6)MZ D – Special environmental and cultural protection zone (1500 hectares or less than 1 % of the FMP)These areas are subject to frequent inundation and have high ecological and/or cultural value.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: Office of Environment and Heritage: Healthy Floodplains Unit; and Waters, Wetlands and Coasts Science Branch.
Name: Lower Namoi Valley FMP Ecological Assets 2020
Display Field: PCTname
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Priority vegetation and wetland assets to inform development of the Lower Namoi FMP floodplain management plan 2019. Native vegetation mapping was predominantly used to identify wetlands and other floodplain ecosystems. Approximately 112,300 ha (or 20% of the floodplain) was identified as native vegetation that is flood dependent. Floodplain water flows are crucial to maintain the structure, function and long-term survival of the flood-dependent communities that occur in the Lower Namoi Valley Floodplain. Attribute field descriptionAssetSubty: 1) Semi-permanent wetlands (non-woody), 2) Floodplain wetland (flood dependent shrubland wetlands),3) Flood dependent forest/woodland (wetland), 4) Flood dependent woodlandThese sub-types were determined based on the ideal watering frequency of the vegetation functional groups that comprise the 2 Asset Types of 1) Wetlands and 2) Other Floodplain Ecosystems. See Table 5 in Background document for more information.Refer to HFP_Source field and Reference field in the attribute table for data sources including:Eco Logical Australia. 2013. Refinement of vegetation mapping in the Namoi Catchment: Extant and pre-European. Prepared for Namoi CMA. May 2013, Eco Logical Australia. 2015. Development of a Biodiversity Prioritisation Plan for the North West LLS Region. Report prepared for North West LLS Region. June 2015, Eco Logical Australia. 2008. Namoi Wetland Assessment and Prioritisation Project. Draft report prepared for Namoi Catchment Management Authority. September 2008, Eco Logical Australia. 2013. Refinement of vegetation mapping in the Namoi Catchment: Extant and pre-European. Prepared for Namoi CMA. May 2013, Eco Logical Australia. 2015. Development of a Biodiversity Prioritisation Plan for the North West LLS Region. Report prepared for North West LLS Region. June 2015, EcoLogical Australia (2008)Vegetation Mapping for the Namoi and Borger Rivers-Gwydir CMAs: Compilation of API Datasets and Preparation of a Hierarchical Vegetation Classification. Proj No.s 125-002 & 129-002., EcoLogical Australia (2009) A Vegetation Map for the Namoi Catachemnt Management Authority. Project No. 125-004. Report prepared for Namoi CMA. June 2009, NSW Hydro Area, NSW Office of Environment and Heritage, 2015. BRG-Namoi Regional Native Vegetation Mapping. Technical Notes, NSW Office of Environment and Heritage, Sydney, Australia, Green, D and Dunkerley, G 1992. Wetlands of the Namoi Valley: Progress Report. March 1992. A progress Report to the Murray-Darling Basin Commission for the Barwon-Darling Wetland Survey, funded under the Natural Resources Management Strategy and wetlands identified by the NSW Healthy Floodplains Project mapped using contours derived from LiDAR.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: • Eco Logical Australia (2008) Vegetation Mapping for the Namoi and Border Rivers-Gwydir CMA’s. Compilation of API Datasets and Preparation of a Hierarchical Vegetation Classification. Project Numbers 125-002 & 129-002. Report prepared for Namoi and Border-Rivers-Gwydir CMAs (VIS ID: 3842)
• Eco Logical Australia (2008a) Namoi Wetland Assessment and Prioritisation Project. Project No. 125-005. Report prepared for Namoi Catchment Management Authority, PO Box 1927, Armidale, NSW 2350
• Eco Logical Australia (2009) A vegetation map for the Namoi Catchment Management Authority. (Project No. 125-004). Report prepared for Namoi CMA June 2009 (VIS ID: 3851)
• Eco Logical Australia (2013) Refinement of vegetation mapping in the Namoi Catchment: Extant and pre-European. Prepared for Namoi CMA. May 2013 (VIS ID: 4028)
• Green, D and Dunkerley, G (1992) Wetlands of the Namoi Valley: Progress Report. Department of Water Resources Technical Services Division. A progress Report to the Murray-Darling Basin Commission for the Barwon-Darling Wetland Survey, funded under the Natural Resources Management Strategy.
• OEH (2015) BRG-Namoi Regional Native Vegetation Mapping. Technical Notes, NSW Office of Environment and Heritage, Sydney, Australia (VIS ID: 4204).
Name: Border Rivers Valley Floodplain Boundary 2020
Display Field: Name
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Border Rivers Valley floodplain, which covers 558,440 hectares, was defined to capture the floodplain areas inundated during flooding of the major rivers and to include any works that may affect flooding. Defining the Border Rivers Valley Floodplain boundary was based on the consideration of the following:• Designated floodplains and floodplain development guidelinesExisting and potential floodplain developments in the Border Rivers Valley Floodplain were identified from the following existing floodplain areas designated under Part 8 of the WA 1912: o Lower Macintyre (Yelarbon Crossing to Mungindi) floodplain which was designated under Section 166 Part 8 of the WA 1912 on 31 July 1985o Floodplain development guidelines for the Macintyre River and Whalan Creek floodplains between Boggabilla and Mungindi (WRC 1981)The existing Lower Macintyre (Yelarbon Crossing to Mungindi) designated floodplain was used as the basis for the Border Rivers Valley Floodplain to capture existing and potential floodplain developments within the floodplain.Where appropriate, the floodplain was extended to include the floodplain development guidelines for the Macintyre River and Whalan Creek floodplains between Boggabilla and Mungindi (WRC 1981).• Hydraulic effects of developmentThe floodplain was extended to include additional flood works located outside the existing designated floodplain area to meet the objectives of the Border Rivers Valley FMP and to assist with the coordination of all flood works across the extent of major flooding.• Cadastral and administrative relevanceWhere appropriate, the floodplain was aligned with significant cadastral features (e.g. state, property, parish, county and LGA boundaries, roads and railways) to simplify administration and to provide clarity to water users.• Planning legacy (unregulated WSPs)Where appropriate, the boundary was aligned with relevant unregulated WSP boundaries to ensure consistency with other boundaries for water management plans under the WM ACT 2000, ease of administration and increased clarity for water users.• Floodplain harvestingThe floodplain boundary included areas identified through the Floodplain Harvesting Program’s expression of interest process for floodplain harvesting licences and potential floodplain harvesting structures. This will ensure consistency with the NSW Floodplain Harvesting Policy (NSW DPI 2013), which only applies to floodplain harvesting activities on properties where all or part of that property lies within the designated floodplain.• Other Valley FMP floodplain boundariesThe Border Rivers Valley Floodplain was aligned with the boundaries of the Gwydir Valley FMP 2016 and the Barwon-Darling Valley FMP 2017 to provide consistency with other water management plan boundaries under the WM ACT 2000.• Landscape featuresWhere appropriate, the boundary was aligned with significant landscape features, such as weirs, to assist ease of administration and to provide clarity for water users. The overall extent of boundary change when compared to the existing designated floodplain was the addition of approximately 113,840 hectares in some areas and the subtraction of approximately 62,990 hectares in other areas
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: NSW Department of Planning, Industry and Environment: Healthy Floodplains Unit, Biodiversity and Conservation Branch
Name: Border Rivers Valley FMP Management Zones 2020
Display Field: Management_Zone
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Used as part of the Healthy Floodplain for the Border Rivers ValleyFloodplain Management Plan(FMP).The nature and location of the management zones proposed for the Border Rivers Valley Floodplain was determined using hydraulic, ecological and cultural criteria as well as criteria to ensure the plan reflects current floodplain management arrangements. The approach for developing the management zones considered the impact of existing and future development on flooding in rivers and floodplains; the flood risk to life and property; the flood connectivity of floodplain assets and the social and economic impacts of restricting flood work development.The Border Rivers Valley FMP 2020contains five different management zones:1. Management Zone A (MZ A) – Major discharge areas, defined floodways (124,359 ha or 23% of the FMP). These areas are generally characterised by relatively high flood-flow velocity and depth (DVP ≥ 0.3 m2/s for large design flood, 1976, 1.3% AEP). 2. Management Zone C (MZ B) – Flood storage and secondary flood discharge (285,755 ha or 51% of the FMP). It is important for the conveyance of floodwater during large flood events and for the temporary pondage of floodwaters during the passage of a flood. It includes ecological assets that have a moderate level of flood dependency, and also includes cultural assets such as modified trees that are likely to only be flood connected during moderate and large floods.3. Management Zone C (MZ C) — Flood fringe and flood protected developed areas (145,590 ha or 26 % of the FMP). MZ C also includes areas protected by flood works that are unlimited height and are not overtopped by water during moderate to large floods. The rules and assessment criteria of MZ C are less restrictive than other management zones as MZ C includes areas where flood work development is unlikely to have a significant effect on flood behaviour. Nevertheless, flood works still require an assessment and approval to protect the health of the floodplain environment.4. Management Zone CU (MZ CU) – Urban areas managed by Local Council (600 ha or less than one % of the floodplain). It includes parts of urban areas where flood risk is managed by local government authorities through flood risk management plans and studies developed in accordance with the Floodplain Development Manual (NSW Government 2005).5. Management Zone D (MZ D) – Special environmental and cultural protection zone (153 ha or less than one % of the floodplain). These areas are subject to frequent inundation and have high ecological and/or cultural value.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: NSW Department of Planning, Industry and Environment: Healthy Floodplains Unit, Biodiversity and Conservation Branch; and Waters, Wetlands and Coasts Science Branch,
Name: Border Rivers Valley FMP Ecological Assets 2020
Display Field: PCTname
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Priority vegetation and wetland assets to inform development of the Border Rivers FMP floodplain management plan 2019. Composite vegetation map derived from various sources (see Metadata/Data Source/Report citation). Contains both flood-dependent and non-flood dependent vegetation and wetlands identified from previous studies.Refer to HFP_Source field and Reference field in the attribute table for data sources including:1. NSW Office of Environment and Heritage, 2015. BRG-Namoi Regional Native Vegetation Mapping. Technical Notes, NSW Office of Environment and Heritage, Sydney, Australia., 2. EcoLogical Aust, 2009. Upgrade of Vegetation Mapping in the Border Rivers-Gwydir Catchment., 3. EcoLogical Australia (2015) Development of a Biodiversity Prioritisation Plan for the North West LLS., 4. Hudson & Bacon (2009) Culturally significant lagoons and salt affected sites project., 5. Landuse data (Lake, Marsh/wetland., 6. HydroArea. 7. Wetlands mapped by Healthy Floodplains Team using LiDAR.Refer to WSP field to identify significant identified lagoons and wetlands from Schedule 5 of the WSP NSW Border Rivers Unreg & Alluvial Water Sources 2012
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: NSW Department of Planning, Industry and Environment: Healthy Floodplains Unit Biodiversity; and Conservation Branch and Waters, Wetlands and Coasts Science Branch,
Description: The rural Floodplain Management Plan for the Macquarie Valley Floodplain 2020 applies to the area defined as the Macquarie Valley Floodplain, which covers 1.24 million hectares. This area is declared to be a floodplain under the Water Management (General) Regulation 2011. This boundary captures the floodplain areas inundated during flooding of major rivers, and any flood works that may affect flooding. The Macquarie Valley Floodplain boundary was delineated based on the consideration of the following:Designated floodplainsExisting and potential floodplain developments in the Macquarie Valley Floodplain were identified from the following floodplain areas designated under Part 8 of the Water Act1912:Lower Macquarie floodplain (designated in 1985)Macquarie River floodplain (designated in 2008 as part of the Macquarie River (Narromine to Oxley Station) FMP 2008) The Water Act 1912 was repealed in 2015 and all existing designated floodplains under this Act transitioned across to the Water Management Act 2000.Hydrology of the Macquarie RiverFloodplain areas influenced primarily by the hydrology of the Macquarie River were included within the Macquarie Valley FMP floodplain boundary and were determined by examining the following information:flood imagery of the 1990 and 2010 floodsMacquarie Valley Floodplain Atlas (Sinclair Knight and Partners Pty Ltd 1984b)DPIE EES inundation mapping (Fisher et al. 2016; Thomas et al. 2015; Thomas et al. 2010)2008, 2014 and 2015 LiDAR Digital Elevation Models (DEMs)hydrodynamic modelling of the Macquarie River and Marthaguy Creek flows.The floodplain was extended from the Macquarie River floodplain for the Macquarie River (Narromine to Oxley Station) FMP 2008 to include the Macquarie Marshes and the effluent creek system. Part of the floodplain of Marthaguy Creek, a tributary of the Macquarie River, was also included because of significant flooding during the December 2010 flood and the contribution of substantial inflows to the Macquarie River. Areas considered not to be predominantly influenced by the hydrology of the Macquarie River, including the lower Bogan and Castlereagh floodplain, were not included in the Macquarie Valley Floodplain. Areas of high ground considered to be above the level of flood-liable land were determined from LiDAR-derived DEMs and contour mapping. These areas were also checked against available flood imagery and flood-dependent vegetation mapping. High ground areas including Mt Foster, Mt Harris and other hills were extracted from the floodplain.Hydraulic effects of developmentThe floodplain area was extended to include flood works outside existing designated floodplain areas, to meet the objectives of the Macquarie Valley FMP and assist with the coordination of all flood works across the extent of major flooding. Cadastral featuresWhere appropriate, the floodplain was aligned with significant cadastral features (e.g. property, parish, county and Local Government Area (LGA)) to simplify administration and provide clarity to water users. Planning legacy (unregulated water sharing plans)The Macquarie Valley Floodplain is entirely within the water management area of the Water Sharing Plan (WSP) for the Macquarie Bogan Unregulated and Alluvial Water Source(2012a). However, alignment of the floodplain boundary with the water management areas of the WSP was not considered important by the Macquarie Technical Advisory Group, as these areas are not delineated according to flooding characteristics. Floodplain harvestingThe floodplain boundary included areas identified in the Floodplain Harvesting Project’s expression of interest process for floodplain harvesting licences and potential floodplain harvesting structures. This will ensure consistency with the NSW Floodplain Harvesting Policy (NSW DPI 2013), which only applies to floodplain harvesting activities on properties where all or part of a property lies within the designated floodplain. Other rural FMP floodplain boundariesThe Macquarie Valley Floodplain was aligned with the boundary for the Barwon–Darling Valley FMP 2017 (NOW 2017) to provide consistency with other boundaries for water management plans under the Water Management Act 2000.Public infrastructure featuresWhere appropriate, the boundary aligns with public infrastructure such as railways and State and Council roads to simplify administration.Urban floodplain management arrangementsWhere appropriate, the boundary aligns with existing floodplain management arrangements in urban areas, such as a Flood Study, Floodplain Risk Management Study (FRMS) and Floodplain Risk Management Plan (FRMP). Amendments to the boundary were made based on information from councils regarding the extent of flood risk management planning arrangements in urban areas.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: The Environment, Energy and Science Group (Healthy Floodplains Team) in conjunction with the Water Group within the Department of Planning, Industry and Environment.
Description: The nature and location of the management zones for the Macquarie Valley Floodplain were determined using hydraulic, ecological and cultural criteria, as well as criteria to ensure the plan reflects previous floodplain management arrangements. This approach considered the impact of existing and future development on flooding in rivers and floodplains; the flood risk to life and property; the flood connectivity of floodplain assets; and the social and economic impacts of restricting flood work development. The above approach resulted in six management zones for the Floodplain Management Plan for the Macquarie Valley Floodplain 2020:Macquarie Management Zone A – major discharge areas (204,800 hectares (ha) or 17% of the floodplain)Macquarie Management Zone BH – major discharge areas in higher floodway areas (18,500 ha or 2% of the floodplain)Macquarie Management Zone B – flood storage and secondary flood discharge areas (314,900 ha or 25% of the floodplain)Macquarie Management Zone C – flood fringe and flood-protected developed areas (626,100 ha or 50% of the floodplain)Macquarie Management Zone CU – urban areas managed by local councils (6,000 ha or less than 1% of the floodplain)Macquarie Management Zone D – special environmental and cultural protection areas (70,200 ha or 6% of the floodplain)
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: NSW Department of Planning, Industry and Environment: Healthy Floodplains Unit, Biodiversity and Conservation Branch; and Waters, Wetlands and Coasts Science Branch.
Description: Priority vegetation and wetland assets to inform development of the rural Floodplain Management Plan for the Macquarie Valley Floodplain 2020 . Refer to HFP_Source field and Reference field in the attribute table for data sources including:CentWestLachSVM_v1p4_PCT_E_4468 (NSW Office of Environment and Heritage, 2015. BRG-Namoi Regional Native Vegetation Mapping. Technical Notes, NSW Office of Environment and Heritage, Sydney, Australia), Macquarie Marshes_2013_E_4892 (Bowen, S., and Fontaine (2014) 2013 Vegetation Map of the Macquarie Marshes. Office of Environment and Heritage, Sydney, NSW) and WesternSVM_v1p0 (OEH - pending technical report).
Name: Murrumbidgee Valley Floodplain Boundary 2025
Display Field: Name
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The Murrumbidgee Valley Floodplain boundary delineates the area to which the Floodplain Management Plan for the Murrumbidgee Valley Floodplain 2025 applies. The area within the boundary is declared to be a floodplain under the Water Management (General) Regulation 2025.The floodplain is 12,300 km2 in area and extends downstream from Wagga Wagga in the east to the junction of the Murray and Murrumbidgee rivers in the west. The floodplain includes the northern end of the Yanco and Colombo creek systems, as well as the Gum Creek anabranch. The floodplain will connect with the floodplain boundaries for the FMPs being developed for the Murray, Lachlan and Billabong Creek valleys, improving the assessment of cumulative impacts from individual flood works across the southern Murray–Darling Basin.A combination of hydraulic and administrative factors, where appropriate, have been used to develop the floodplain boundary including: • inundation data within the Murrumbidgee catchment • hydraulic model development • the previous localised Hay to Maude FMP • water source boundaries, as established in water sharing plans • local government areas • major roads and railways which act as barriers to large scale flood movement.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: Water Group within the NSW Department of Climate Change, Energy, the Environment and Water
Name: Murrumbidgee Valley FMP Management Zones 2025
Display Field: ManagementZone
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The management zones represent the hydraulic, ecological or Aboriginal cultural (or combination of) attributes of the land. No attribute was given precedence over another. Instead, a classification tool was applied to each area of the floodplain to determine the appropriate management zone. Based on the management zone assigned, the relevant rules and assessment criteria in Part 7 of the plan apply.There are 5 management zones within the proposed Murrumbidgee Valley Floodplain:Management Zone A - floodwaysManagement Zone B - inundation extentManagement Zone C - flood fringe and flood protected areasManagement Zone CU - urban areasManagement Zone SP - special protection.The supporting information field in the attribute table provides the reason for the management zone allocationfor any given polygon.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: Water Group within the NSW Department of Climate Change, Energy, the Environment and Water
Name: Murrumbidgee Valley FMP Ecological Assets 2025
Display Field: PCT
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: As part of assessing and determining an application for a flood work approval, a search of this spatial dataset must be undertaken. All applications for a flood work approval must demonstrate that flood or flow connectivity is maintained to these ecological assets. Flood-dependent ecological assets rely on flooding to maintain their ecological character and sustain essential processes. Flood-dependent ecological assets are identified in FMPs to support their protection, which in turn provides social and economic benefits to the community. The ecological assets have been identified using the best available vegetation mapping and survey information including the NSW State Vegetation Type Map (Dec 2022 release) and wetland mapping including:Biosis (2014) Nimmie-Caira Ecological Assessment, Nimmie-Caira Ecological Assessment: Stage 2, Phase 2: Assessment of Ecological Status, a report on the ecological values of the Nimmie-Caira landholding, lower Murrumbidgee River floodplain, NSW. Prepared for NSW Office of Water. Authors: Looby, M., Steelcable, T., Gilmore, D. and Smales, I. Biosis Pty Ltd, Wangaratta Office. Project no. 18206Commonwealth of Australia 2023, Commonwealth Environmental Water Holder Water Management Plan 2023–24, Canberra. CC BY 4.0. ISBN 978-1-76003-434-4Department of Climate Change, Energy, the Environment and Water (DCCEEW) (2016) Directory of Important Wetlands in Australia.Department of Planning, Industry and Environment (DPIE) (2020) Murrumbidgee Long Term Water Plan. Part A: Murrumbidgee catchment. ISBN 978-1-922317-79-7 EES 2020/0078 July 2020Frazier, P (2001) River flow/wetland inundation relationships for the mid-Murrumbidgee River: Gundagai –Hay. Charles Sturt University - Wagga Wagga (April 2001)Hall, A., Duffy, D., Horta, A and Wassens, S (2023) Improving wetland boundary accuracy by state of art spatial knowledge, Gulbali Institute, Spatial Data Analysis Network, Charles Sturt University, Albury. NSW Final Report to Department of Planning and Environment 2023Murray-Darling Basin Authority (MDBA) (2019) Basin-wide environmental watering strategy. Second Edition. 22 November 2019. Published by the Murray-Darling Basin Authority. MDBA publication no: 42/19. ISBN (online): 978-1-925762-47-1Porteners, M.F. (2013) Vegetation Survey of Thelangerin Addition to Lachlan Valley State Conservation Area and Lachlan Valley National Park and PCT Alignment of Existing Mapping for Thelangerin, Kalyarr National Park (Darcoola), Kalyarr State Conservation Area (Norwood) and Lachlan Valley National Park (McFarlanes). Report to the Office of Environment and Heritage, Department of Premier and Cabinet (Marianne Porteners Environmental Consulting: Sydney).Powell, M, Hodgins, G, Cowood, A, Ling, J, Wen, L, Tierney, D and Wilson C (2017) NSW Building a NSW wetland inventory: Lachlan River Catchment wetland mapping methods.Report for NSW Office of Environment and HeritageWebster, R (2007) Investigation into potential water savings from the Yanco Creek System (Off-take to Yanco Bridge) Wetlands by Rick Webster 2007.
Service Item Id: 0194ed388fe541c08218c7197e17b73b
Copyright Text: Conservation Programs, Heritage and Regulation Group and Water Group within the NSW Department of Climate Change, Energy, the Environment and Water