National Groundwater Dependent Ecosystems (GDE) Atlas (including WA)

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nThe dataset expresses the potential for groundwater interaction/use for river/spring/wetland ecosystems across Australia. It shows the ecosystems that rely on groundwater that has been discharged to the surface, such as baseflow or spring flow. The dataset was created by analysing all river/spring/wetland polygons contained in existing maps, and the outcome of the analysis identified which of those polygons were potentially interacting with groundwater. All river/spring/wetland polygons are considered to be accessing a source of water in addition to rainfall, and hence, they are all Inflow Dependent Ecosystems (IDEs). The river/spring/wetland ecosystems were analysed to determine whether the additional water source was likely to be groundwater, water in the unsaturated zone or surface water. Where this additional information enabled a conclusion to be made on the potential of each river/spring/wetland ecosystem to be interacting with groundwater, the ecosystem was included in the Groundwater Dependent Ecosystem (GDE) layer ('Reliant on surface expression of groundwater') and categorised as having either a high, moderate or low potential for groundwater interaction.\n\n\n\nThe dataset expresses the potential for groundwater interaction/use of vegetation ecosystems across Australia. It shows the ecosystems that use groundwater from beneath the watertable or in the capillary zone. The dataset was created by analysing all vegetation polygons contained in existing maps, and the outcome of the analysis identified which of those polygons were potentially interacting with groundwater. The analysis initially identified vegetation polygons that were using another water source in addition to rainfall using remote sensing (MODIS and Landsat) data. These ecosystems are known as IDEs. The IDEs were then analysed further to determine whether the additional water source was likely to be groundwater, soil water or surface water. Where this additional information enabled a conclusion to be made on the potential of each vegetation IDE to be using groundwater, the ecosystem was included in the GDE layer ('Reliant on subsurface groundwater') and categorised as having either a high, moderate or low potential for groundwater interaction.\n\n\n\nA publicly available version of this dataset can be accessed via the following dataset: National Atlas of Groundwater Dependent Ecosystems (e358e0c8-7b83-4179-b321-3b4b70df857d).\n\n\n\nNational Atlas of Groundwater Dependent Ecosystems is available online at http://www.bom.gov.au/water/groundwater/gde/.\n\n## **Dataset History** \n\nrefer to methodology report\n\n\n\nhttp://www.bom.gov.au/water/groundwater/gde/reports.shtml\n\n\n\nShould also be noted that metadata related to each of the GIS layers in the Atlas is included in the GIS.\n\n## **Dataset Citation** \n\nBureau of Meteorology (2012) National Groundwater Dependent Ecosystems (GDE) Atlas (including WA). Bioregional Assessment Source Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/6dbaee0d-8813-46b1-9c13-1b796e7ed3bf.

## 摘要

本数据集及其元数据说明由第三方提交至生物区域评估计划（Bioregional Assessment Programme），本文档按原始提交版本呈现。

本数据集展示了澳大利亚全境河流、泉及湿地生态系统与地下水发生交互/依赖地下水的潜在程度。该数据集标识出依赖于排泄至地表的地下水的生态系统，例如基流或泉流生态。数据集的构建流程为：分析现有地图中收录的全部河流、泉及湿地多边形要素，经分析识别出其中可能与地下水发生交互的要素。所有上述多边形要素均被认为除降水外还可获取其他水源，因此均属于入流依赖生态系统（Inflow Dependent Ecosystems，IDEs）。随后研究人员对这些河流、泉及湿地生态系统展开进一步分析，以判定其额外获取的水源类型为地下水、非饱和带水还是地表水。当通过补充信息可确定某一河流、泉或湿地生态系统存在与地下水交互的潜在可能性时，该生态系统将被纳入地下水依赖生态系统（Groundwater Dependent Ecosystems，GDE）图层（定义为“依赖地下水地表排泄”），并按地下水交互潜力划分为高、中、低三个等级。

本数据集同时展示了澳大利亚全境植被生态系统依赖地下水的潜在程度。该数据集标识出可从地下水位以下或毛细水带获取地下水的生态系统。数据集的构建流程为：分析现有地图中收录的全部植被多边形要素，经分析识别出其中可能与地下水发生交互的要素。研究人员首先借助遥感（MODIS与Landsat）数据，识别出除降水外还可获取其他水源的植被多边形要素，此类生态系统即为入流依赖生态系统（IDEs）。随后对这些植被类IDE展开进一步分析，以判定其额外获取的水源类型为地下水、土壤水还是地表水。当通过补充信息可确定某一植被类IDE存在利用地下水的潜在可能性时，该生态系统将被纳入地下水依赖生态系统（GDE）图层（定义为“依赖地下地下水”），并按地下水交互潜力划分为高、中、低三个等级。

公众可通过以下数据集获取本数据集的公开版本：《地下水依赖生态系统国家图集》（National Atlas of Groundwater Dependent Ecosystems，编号：e358e0c8-7b83-4179-b321-3b4b70df857d）。

《地下水依赖生态系统国家图集》可通过以下网址在线获取：http://www.bom.gov.au/water/groundwater/gde/。

## 数据集历史

详见方法学报告

http://www.bom.gov.au/water/groundwater/gde/reports.shtml

此外需说明，本图集内所有GIS图层的相关元数据均已包含在GIS文件中。

## 数据集引用

澳大利亚气象局（Bureau of Meteorology，2012）：《国家地下水依赖生态系统（GDE）图集（含西澳地区）》，生物区域评估源数据集。2019年3月13日查阅，来源网址：http://data.bioregionalassessments.gov.au/dataset/6dbaee0d-8813-46b1-9c13-1b796e7ed3bf。