Water supply concept Lower Saxony 1: 500 000 — Usage pressure for 2030 in dry conditions for groundwater bodies

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. The map shows the usage pressure for the 2030 viewing time under dry conditions for groundwater bodies.下萨克森州供水理念（Lower Saxony water supply concept）的总体目标是保障下萨克森州的长期供水安全，尤其是作为公共普遍服务核心组成部分的公共供水服务。供水保障工作需结合当前及区域性挑战，并着眼于可持续地下水管理（groundwater management）进行进一步优化完善。为此，政策制定者、水务管理机构以及水资源使用者均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。下萨克森州供水理念为此提供了开展相关工作所需的全国性信息框架。 作为一项技术理念，它为水务使用者、许可审批机构、水管理相关用地主体以及社会公众提供了透明且兼具前瞻性的信息参考与规划依据。 本理念明确不将单个流程的相关要求作为核心目标。 作为供水理念的组成部分，本内容涵盖了下萨克森州供水的现状（基准年为2015年）以及中、长期发展态势。 在此框架下，将针对2015年、2030年、2050年及2100年等不同时间节点，对比中等及干旱情境下的地下水需水量与相关地下水使用者的用水需求。 下萨克森州供水理念的研究方法采用网格化模式。为此，构建了覆盖下萨克森州与不来梅州全境的500×500米网格。 用于规划当前及未来地下水管理的国家级数据库已接入该网格系统，并为后续开展的计算、评估与最终成果呈现工作提供了核心依据。 本地图展示了干旱情境下2030年时间节点的地下水水体使用压力分布情况。