Wetlands Insight Tool Ramsar Wetlands Polygons

Background                        Wetlands provide a wide range of ecosystem services including improving water quality, carbon sequestration, as well as providing habitat for fish, amphibians, reptiles and birds. Managing wetlands in Australia is challenging due to competing pressures for water availability and highly variable climatic settings. The Wetlands Insight Tool (Ramsar Wetlands) has been developed to provide catchment managers, environmental water holders, andwetlands scientists a consistent historical baseline of wetlands dynamics from 1987 onwards. The Wetlands Insight Tool (Ramsar Wetlands) is available online through the DEA Mapswebsite.The Ramsar Wetlands of Australia Dataset is available under a Creative Commons Attribution 3.0 Australia Licence. We created individual wetland polygons from the multipart Ramsar polygons in the dataset. The 6 Australian Ramsar Sites in external territories are excluded as they are outside of Australia’s satellite data footprint.                        What this product offers                        The Wetlands Insight Tool (Ramsar Wetlands) summarises how the amount of water, green vegetation, dry vegetation and bare soil varies over time within eachwetland boundary.It provides the user with the ability to compare how the wetland is behaving now with how it has behaved in the past. This allows users to identify how changes in water availability have affected the wetland.It achieves this bypresentinga combined view of Water Observations from Space (DEA Water Observations), Tasseled Cap Wetness (DEA Wetness Percentiles) and Fractional Cover (DEA Fractional Cover) measurements from the Landsat series of satellites, summarised as a stacked line plot to show how that wetlandhas changed over time.

### 背景
湿地可提供多样生态系统服务，涵盖水质改善、碳封存，同时为鱼类、两栖类、爬行类及鸟类提供栖息生境。澳大利亚的湿地管理工作颇具挑战，一方面存在水资源供给的竞争性需求，另一方面当地气候条件高度多变。本团队开发了湿地洞察工具（Ramsar Wetlands），旨在为流域管理者、环境用水权益方及湿地科研人员提供1987年以来统一的湿地动态历史基准。该工具可通过DEA Maps网站在线获取。澳大利亚拉姆萨尔湿地数据集采用知识共享署名3.0澳大利亚许可协议发布。我们从数据集中的多部分拉姆萨尔湿地多边形中提取得到单个湿地多边形。由于6处位于海外领地的澳大利亚拉姆萨尔湿地站点处于澳大利亚卫星数据覆盖范围之外，因此未被纳入本数据集。

### 产品功能
湿地洞察工具（Ramsar Wetlands）可统计各湿地边界内水体、绿色植被、枯干植被与裸土的面积随时间的变化情况。该工具支持用户对比湿地当前与历史的状态变化，帮助用户识别水资源供给变化对湿地的影响机制。其实现路径为：整合陆地卫星（Landsat）系列获取的太空水体观测（DEA Water Observations）、缨帽湿度（DEA Wetness Percentiles）以及地表组分占比（DEA Fractional Cover）数据，并以堆叠折线图的形式汇总展示湿地随时间的变化过程。