DARLING RIVERINE PLAINS BIOREGION Background Report

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List of Figures Chapter 1 Figure 1.1 <strong>Report</strong>s resulting from the DRP Biodiversity Conservation Assessment Project ..........................................16 Chapter 2 Figure 2.1 Annual rainfall records for Bourke 1871-1999..............................................................................................31 Figure 2.2 Bourke mean monthly rainfall and range between first and ninth decile.......................................................31 Figure 2.3 Mungindi mean monthly rainfall and range between first and ninth decile...................................................32 Figure 2.4 Menindee mean monthly rainfall and range between first and ninth decile...................................................32 Figure 2.5 Trangie mean monthly rainfall and range between first and ninth decile ......................................................33 Figure 2.6 Walgett mean monthly rainfall and range between first and ninth decile......................................................33 Figure 2.7 Median monthly rainfall for weather stations across the DRP.......................................................................34 Figure 2.8 Mean monthly rain days recorded across the DRP ........................................................................................34 Figure 2.9 Rainfall CuSums for five locations in the DRP .............................................................................................35 Figure 2.10 Mean monthly wind speed at 9am.................................................................................................................36 Figure 2.11 Mean monthly wind speed at 3pm.................................................................................................................37 Figure 2.12 Mean monthly maximum temperatures .........................................................................................................38 Figure 2.13 Mean monthly minimum temperatures..........................................................................................................38 Figure 2.14 Mean daily evaporation at Walgett and Bourke.............................................................................................39 Figure 2.15 Geological history of the Nyngan and Walgett 1:250 000 map sheets ..........................................................40 Figure 2.16 Lower Gwydir Wetlands ...............................................................................................................................48 Figure 2.17 Groundwater features of the Coonamble Embayment of the Great Artesian Basin.......................................50 Chapter 3 Figure 3.1 Profile of the Bogan-Macquarie Province .....................................................................................................64 Figure 3.2 Profile of the Castlereagh-Barwon Province .................................................................................................65 Figure 3.3 Profile of the Culgoa-Bokhara Province........................................................................................................65 Figure 3.4 Profile of the Warrambool-Moonie Province ................................................................................................66 Figure 3.5 Profile of the Narran-Lightning Ridge Province............................................................................................66 Figure 3.6 Profile of the Collarenebri Interfluve Province .............................................................................................67 Figure 3.7 Profile of the Louth Plains Province..............................................................................................................67 Figure 3.8 Profile of the Wilcannia Plains Province.......................................................................................................68 Figure 3.9 Profile of the Menindee Province..................................................................................................................68 Figure 3.10 Profile of the Great Darling Anabranch Province..........................................................................................69 Figure 3.11 Profile of the Pooncarie-Darling Province.....................................................................................................69 Figure 3.12 Profile of land units within the Lower Gwydir Wetlands ..............................................................................78 Chapter 8 Figure 8.1. Bioregional conservation assessment framework 133 Figure 8.2. Nationally significant biological refugia within the DRP 147
PROJECT SUMMARY This report forms part of stage one of the two stage Darling Riverine Plains Conservation Assessment Project, funded by the NSW Biodiversity Strategy, which was released in 1999. The Biodiversity Strategy is a whole of government document and all government agencies are committed to working cooperatively towards conserving the biodiversity of NSW. The Strategy outlines a framework for coordinating and integrating government and community efforts to conserve biodiversity across all landscapes. Project objectives and methods The existing abiotic and biotic information of the Darling Riverine Plains bioregion (DRP) within New South Wales has been collated and synthesised in this report. This information provides a baseline for planning further work and conservation needs in this bioregion. The human activities in this region are also outlined as these have an impact on the natural distribution and abundance of plants and animals and affect the measures required for biodiversity conservation. Key features of the DRP in NSW The Darling Riverine Plains bioregion is a fluvial environment, having been almost entirely shaped and maintained by water flow and responses to water. This is reflected by the alluvial origin of the underlying geology and soils and by the gently undulating topography. Rivers and wetlands of the lower plains and floodplains of six catchments make up the bioregion and an understanding of the hydrology of the bioregion is fundamental to an understanding of the ecosystems. Flooding is essential for the healthy functioning of the ecosystem. Flooding is extremely irregular and does not follow predictable patterns. The Darling Riverine Plains bioregion in NSW covers approximately 9 255 000 ha (approximately 12% of New South Wales) and includes the lower reaches and alluvial fans of the Bogan, Macquarie, Castlereagh, Namoi, Barwon, Culgoa, Bokhara, Narran, Gwydir and MacIntyre Rivers and the Darling River corridor from Bourke to the southern edge of the Menindee Lakes. Although almost all of the bioregion lies within the semi-arid zone, there is substantial climatic variation. This is especially so for rainfall, which varies both spatially and
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Page 7 and 8: 10 APPENDICES 166 A CLIMATIC DATA B
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Initial Phase Assessment Phase 16/0
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Appendix A: Mean Monthly Rainfall a
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Major Rangetype Rangetype Physiogra
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Appendix C : Native Flora Other Tha
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Family Scientific Name Common Name
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Family Scientific Name cretica Comm
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APPENDIX E: Fauna Other than Those
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Common Name Scientific Name No Reco
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Common 1983 1984 1985 1986 1987 198
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Common Name 1983 1984 1985 1986 198
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Taxa No Records Dataset Class Arach
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Taxa No Records Dataset Family Hebr
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Taxa No Records Dataset Tabanidae s
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Taxa No Records Dataset Berosus sp
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DARLING RIVERINE PLAINS BIOREGION Background Report

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