WMS flood risk map NRW

North Rhine-Westphalia has been making considerable efforts for many years to protect people, the environment, economic and cultural goods from the dangers of flooding. In addition to structural measures, the mapping of risks, the information of the affected citizens, precautionary planning and flood-oriented development planning are of central importance. By 2015, flood risk management plans will be developed in North Rhine-Westphalia for all areas where significant flood damage can occur. The aim of the new plans is to inform about existing hazards and to capture and coordinate actions from different actors in order to reduce and manage flood-related risks to human health, the environment, infrastructure and property. The basis for this is the EC Flood Risk Assessment and Management Directive (EC-HWRM-RL), which entered into force on 26 November 2007. The aim of the Directive was adopted by the Federal Government in the amendment to the Water Budget Act (WHG) (in force since 1 March 2010). The following steps are foreseen to implement the WHG: Until December 2011: Preliminary assessment and definition of areas where floods may pose a significant risk to human health, the environment, cultural heritage, economic activities or material assets (so-called risk areas). Until December 2013: Preparation of flood hazard and risk maps for these areas. Flood risk maps are drawn up on the basis of flood hazard maps for the same flood scenarios. In addition to the flood hazards (extension of floods), the flood-related adverse effects (e.g. the number of inhabitants concerned, affected residential or protected areas, endangered cultural objects) are to be presented.

北莱茵-威斯特伐利亚州（North Rhine-Westphalia）多年来持续投入大量努力，致力于保护民众、生态环境、经济与文化财产免受洪水风险威胁。除工程性防洪措施外，风险测绘、受影响群体的信息告知、预防性规划以及面向洪水的发展规划均处于核心地位。至2015年，北莱茵-威斯特伐利亚州将为所有存在重大洪水损失风险的区域制定洪水风险管理计划。新计划的核心目标是向公众通报现有灾害风险，梳理并协调多主体的防洪行动，以降低并管控洪水对人类健康、生态环境、基础设施及私有财产带来的相关风险。
此项工作的法定依据为2007年11月26日生效的《欧盟洪水风险评估与管理指令》（EC Flood Risk Assessment and Management Directive，EC-HWRM-RL）。该指令的落实目标已由德国联邦政府在《水预算法案》（Water Budget Act, WHG）的修订案中予以明确，该修订案自2010年3月1日起正式施行。
为落实《水预算法案》的要求，规划了以下实施阶段：
1. 2011年12月前：完成初步评估，划定洪水可能对人类健康、生态环境、文化遗产、经济活动或物质资产构成重大风险的区域（即"重大风险区"）。
2. 2013年12月前：为上述区域编制洪水灾害与风险地图。洪水风险地图需基于同一洪水情景下的洪水灾害地图进行编制，除标注洪水灾害（即洪水蔓延范围）外，还需呈现洪水相关的各类不利影响，例如受影响居民人数、受影响的居住区或保护区、濒危文化遗存等。