Saltmarsh Extents

Polygon data layer showing the extent of Saltmarsh in Coastal and Transitional waters for use by both Flood and Coastal Risk Management and the implementation of Water Framework Directive. At the seaward end of the transect, the final demarcation will be where the saltmarsh vegetation cover has become so sparse it only covers 5% whether it is Upper, Mid, Lower or Pioneer saltmarsh.本多边形数据图层（Polygon data layer）展示了沿海与过渡水域（Coastal and Transitional waters）内盐沼（Saltmarsh）的分布范围，可用于洪水与海岸风险管理（Flood and Coastal Risk Management）及水框架指令（Water Framework Directive）的落地实施。在样带（transect）向海端，最终的分界点为盐沼植被覆盖率仅为5%的区域，无论该区域属于高潮盐沼（Upper saltmarsh）、中潮盐沼（Mid saltmarsh）、低潮盐沼（Lower saltmarsh）或先锋盐沼（Pioneer saltmarsh）。