Modelled fluvial flood depth and climate change depth difference data created 2004: 1 percent annual chance for grid reference SD

The depth difference dataset (2004) is a depth grid showing the difference between modelled fluvial flood depths and modelled fluvial flood depths under climate change conditions (an increase in peak flows of 20%).
Modelled fluvial flood depth and climate change depth difference data* was created for both the 1% annual chance of flooding situations and was produced as a by-product from the 2004 generalised modelling project. The purpose of the generalised modelling project was to fill the gaps where there was no detailed local modelled data in 2004, in order to define the extents of Flood Zones for spatial planning.
A two-dimensional hydrodynamic model called JFlow was used to produce both the modelled fluvial flood depth and modelled fluvial flood depth with climate change data. This depth difference data, using these 2 datasets, is provided on a 5x5m grid.
Since 2004, some local detailed modelling projects have included scenarios for climate change however this depth difference dataset has not been updated.
INFORMATION WARNING: This data is not suitable for identifying whether an individual property will flood due to climate change, for detailed decision making or for use in site specific Flood Risk or Strategic Flood Risk Assessments. Where this data is used further evidence, verification and studies should be undertaken. Climate change allowances have changed since this work was completed in 2004.
More recent, accurate and local detailed modelling depth data with climate change is available for some places. Please contact your local Environment Agency office to see if detailed modelling is available for your area of interest.
This metadata record is for Approval for Access product AfA480 2004 1 in 100 Fluvial Depth Grid Climate Change Difference
Modelled fluvial flood depth data with climate change are available for the whole of England, however this data is for the 100x100km squared Ordnance Survey National Grid reference SD. If you are interested in data for another grid reference refer to this Ordnance Survey National Grid document to find the relevant referencing code and search on Data.gov.uk again to download the data. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved. Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). Defra, Met Office and DARD Rivers Agency © Crown Copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right 2015. Land & Property Services © Crown copyright and database right.

深度差异数据集（2004年）展现的是在模型模拟的河流洪水深度与考虑气候变化条件下的模拟河流洪水深度之间的差异（峰值流量增加20%）。该模型模拟的河流洪水深度和气候变化深度差异数据针对1%年一遇的洪水事件而创建，并作为2004年通用建模项目的副产品产出。通用建模项目的目的在于填补2004年未曾详细建模的局部数据空白，以界定防洪区的范围，服务于空间规划。在生成模型模拟的河流洪水深度及考虑气候变化的数据时，采用了名为JFlow的二维水动力学模型。基于这两个数据集，深度差异数据以5x5米的网格形式提供。自2004年以来，部分地方详细建模项目已包含气候变化情景，然而此深度差异数据集尚未更新。信息警示：本数据不适用于判断单个财产因气候变化是否会发生洪水，不适用于详细决策，亦不适用于特定地点的洪水风险或战略洪水风险评估。在使用本数据时，应进行进一步证据收集、验证和研究。自2004年工作完成以来，气候变化允许的额度已发生变化。对于某些地区，有更近、更精确且更详细的局部建模深度数据可供使用。如需了解您感兴趣区域是否可获得详细建模数据，请联系当地环境署办公室。本元数据记录为AfA480 2004 1产品，100年一遇河流深度网格气候变化差异。考虑气候变化模拟的河流洪水深度数据适用于整个英格兰，然而本数据针对的是100x100平方公里的军用地形网格参考SD。如需获取其他网格参考的数据，请查阅此军用地形网格文件，以找到相关引用代码，并在Data.gov.uk上再次搜索以下载数据。归属声明：© 环境署版权及/或数据库权利2016。保留所有权利。本信息的一些特性基于从生态与水文中心（CEH）获得许可的数字空间数据。© NERC（NERC）。Defra、气象办公室和DARD河流管理局©皇家版权。©克兰菲尔德大学。©詹姆斯·哈顿研究所。包含OS数据©皇家版权和数据库权利2015。土地与物业管理局©皇家版权和数据库权利。