Water supply concept Lower Saxony 1: 500 000 — Change in usage pressure for the time of 2050 (at IST state) in the middle ratio for districts (WMS service)

The Lower Saxony water supply concept serves the overarching objective of ensuring the long-term supply of water in Lower Saxony, in particular public water supply as a key component of public services of general interest. Water supply needs to be further developed in line with current and regional challenges and with a view to sustainable groundwater management. To this end, it is necessary for policymakers and water authorities as well as for the users of the resource to be able to identify needs at an early stage in order to take measures to ensure the long-term supply of water in Lower Saxony in a timely manner. The Lower Saxony water supply concept provides a nationwide information framework necessary for this purpose. As a technical concept, it serves water users, licensing authorities and the land for water management and the public as a transparent and forward-looking basis for information and planning. Requirements for individual procedures are expressly not the objective. As part of the water supply concept, the current status (reference year 2015) and the medium- and long-term developments of Lower Saxony’s water supply are accounted for. Here, the groundwater requirement for medium and dry conditions and the water needs of the relevant groundwater users are compared at different times (2015, 2030, 2050 and 2100). The methodology of the Lower Saxony water supply concept was carried out in a grid-based manner. For this purpose, a 500 x 500 m grid was created, which extends over the whole of Lower Saxony and Bremen. National data bases for planning the current and future management of groundwater have been transferred to the grid. These formed the basis of the calculations, evaluations and final presentations carried out. For 2050, the map shows the change in usage pressure compared to the IST state at middle ratios for districts.下萨克森州供水规划的核心目标是保障该州长期供水安全，其中公共供水作为公共普惠服务的关键组成部分，尤需得到优先保障。供水系统需结合当前及区域性挑战，并以地下水可持续管理为导向，进行进一步优化完善。为此，政策制定者、水务主管部门以及水资源使用者需能够尽早识别供水需求，以便及时采取措施保障下萨克森州的长期供水安全。本供水规划为此提供了必要的全州性信息框架。作为一项技术规划，它可为水务使用者、许可主管部门、水管理相关土地管理者及社会公众提供透明且具有前瞻性的信息与规划依据。本规划并未将单一流程的具体要求作为目标。 作为本供水规划的组成部分，本次分析涵盖了下萨克森州供水现状（基准年为2015年）以及中远期发展趋势。在此框架下，研究将对比不同时间节点（2015年、2030年、2050年及2100年）下，中等及干旱情景下的地下水需求与相关地下水使用者的用水需求。 下萨克森州供水规划采用网格化分析方法开展。为此，研究构建了覆盖下萨克森州与不来梅州全域的500米×500米网格。用于当前及未来地下水管理规划的国家级数据库已整合至该网格体系中，以此作为后续计算、评估及最终成果展示的基础。 针对2050年场景，本地图展示了各行政区在中等比例情景下，相较于现状基准状态的用水压力变化情况。