Risk of Flooding from Reservoirs - Maximum Flood Extent (Web Mapping Service)

This dataset is now retired and replaced with the following:

Reservoir Flood Extents - Fluvial Contribution (National) https://environment.data.gov.uk/dataset/db114020-465a-412b-b289-be393d995a75
Reservoir Flood Extents - Wet Day (National) https://environment.data.gov.uk/dataset/d81646cf-37e5-4e71-bbcf-b7d5b9ca3a1c
Reservoir Flood Extents - Dry Day (National) https://environment.data.gov.uk/dataset/c66ee97f-49d2-454e-9a19-d48a47bd22ad

This is the simplified version of the outline Reservoir Flood Map Outline (Extent) as shown on the gov.uk Flood Risk website. This is one of 3 available "Risk of Flooding from Reservoirs" Web Mapping Services; Maximum Flood Depth, Maximum Flood Extent, Maximum Flood Speed.

Simplified in this context refers to the fact that unlike the detailed product, individual reservoir flood map extents are not shown separately, and one merged outline shows the maximum flood extent for all reservoir flooding scenarios together.

This is a data layer showing a combined reservoir flood map for 2,092 Large Raised Reservoirs. The data shows the maximum extent of flood should reservoirs be breached, and although the location of each reservoir can be inferred they are not explicitly shown on the maps. The Reservoir Flood Map Maximum Flood Outline (Extent) in its simplified form is referred to externally as Risk of Flooding from Reservoirs – Maximum Flood Extent.

The Reservoir Flood Map Outline (Extent) shows the largest area that might be flooded if a reservoir were to fail and release the water it holds. Since this is a prediction of a credible worst case scenario, it’s unlikely that any actual flood would be this large. These data are intended for emergency planning only and are not reliable for large scale flood risk assessments.

Please note that only flood maps for large reservoirs are displayed. Flood maps are not displayed for smaller reservoirs or for reservoirs commissioned after reservoir mapping began in spring 2009.

Information Warning:
The Maximum extent category is available under the standard OGL terms when supplied as a WMS. This excludes the underlying data. Attribution statement: © Environment Agency copyright and/or database right 2019. All rights reserved.

本数据集现已退役，并由以下数据集替代：

水库洪水范围 - 河流贡献（全国）https://environment.data.gov.uk/dataset/db114020-465a-412b-b289-be393d995a75
水库洪水范围 - 潮湿天气（全国）https://environment.data.gov.uk/dataset/d81646cf-37e5-4e71-bbcf-b7d5b9ca3a1c
水库洪水范围 - 干燥天气（全国）https://environment.data.gov.uk/dataset/c66ee97f-49d2-454e-9a19-d48a47bd22ad

此为政府网站洪水风险页面所展示的水库洪水地图轮廓（范围）的简化版。这是三款“水库洪水风险”网络地图服务之一，包括最大洪水深度、最大洪水范围和最大洪水流速。

在此语境中，“简化”一词指的是，与详细产品不同，单个水库洪水地图的范围并未单独展示，而是通过一个合并的轮廓展示了所有水库洪水场景的最大洪水范围。

本数据层展示了2,092个大型抬高水库的合并水库洪水地图。数据显示了水库被破坏时的最大洪水范围，尽管每个水库的位置可以通过推断得知，但并未在地图上明确标注。其简化形式的《水库洪水地图最大洪水轮廓（范围）》在外部被称为“水库洪水风险 - 最大洪水范围”。

水库洪水地图轮廓（范围）展示了水库失效并释放所持水时可能被淹没的最大区域。鉴于这是对可信最坏情况的预测，实际洪水不太可能达到如此规模。这些数据仅适用于应急规划，且不适用于大规模洪水风险评估。

请注意，仅显示大型水库的洪水地图。对于较小水库或2009年春季开始进行水库测绘后投入运营的水库，不显示洪水地图。

信息警告：当作为WMS提供时，最大范围类别在标准OGL条款下可用，不包括基础数据。归属声明：© 环境署版权和/或数据库权利2019。版权所有。