Water structure mapping NRW

The water structure (also: Water morphology or hydromorphology) encompasses the morphological properties of a body of water. These include, for example, the course of the water (meaning, stretched), the sohl substrate (gravel, sand), the flow velocity, the shore quality, etc. Structural diversity also means biodiversity, since different habitat requirements of different aquatic organisms can be met. The water structure was recorded in NRW at a distance of 100 m. A corresponding mapping instruction of the LANUV is available. The water structure class characterises the water structure in comparison to the potential natural habitat-typical state. Changes in aquatic structure have an impact on the extent to which a body of water is able to change its bed in dynamic processes and serve as a habitat for aquatic and amphibious organisms. The data shown here comes from the national mapping 2011-2013 as well as the updated data collected between 2016 and 2020 as part of re-mapping of the water structure. New mappings refer to mappings of newly created or altered water trajectories (e.g. through hydromorphological transposition measures) without available water structure data; Post-mapping refers to replacing, picking up or complementing existing water structure data.水体结构（亦称水体形态学或水文形态学（hydromorphology））涵盖水体的形态学属性，具体包括河道（即延展形态）、河床底质（砾石、沙等）、流速、岸带质量等。水体结构多样性同样支撑生物多样性，因其可满足不同水生生物各异的栖息需求。水体结构数据已于北莱茵-威斯特伐利亚州（NRW）以100米的间距开展采集，德国北莱茵-威斯特伐利亚州自然、环境与消费者保护局（LANUV）配套发布了对应的测绘指南。水体结构等级用于表征水体结构相较于潜在自然栖息典型状态的差异。水体结构的变化会影响水体在动态过程中改变河床的能力，以及其作为水生与两栖生物栖息环境的效能。本次展示的数据来源于2011-2013年的国家级测绘项目，以及2016-2020年间作为水体结构重测绘项目一部分所采集的更新数据。新测绘指针对尚无可用水体结构数据的新建或改造河道（例如通过水文形态学迁移措施改造的河道）开展测绘；补测则指对现有水体结构数据进行替换、补采或补充完善。