Feasibility assessment and scheme research on emergency water supply of groundwater emergency source in Changde City
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摘要: 寻找地下水应急水源地、建立应急供水机制,是城市发生日常供水障碍时保障居民用水安全、维护社会稳定的重要措施。通过分析常德市规划区水文地质条件,圈定了5个地下水应急水源地,总结了同类型城市地下水应急水源地的选址原则,并从水量、水质、开采能力3个方面对水源地进行了可行性分析。结合现有城市供水管网及地下水开采井保留情况,分别考虑了人均用水量最低标准20 L/d和一般标准50 L/d两种状态下的应急供水方案。应急供水每人20 L/d状态下,保留井的现有供水能力可以满足应急供水需求,而应急供水每人50 L/d状态下,河洑水源地和芦荻山水源地保留井的现有供水能力不足,建议增加开采井以满足应急供水需求。Abstract: Exploring groundwater emergency source and establishing emergency water supply mechanism are important measures to ensure the safety of residents‘ water use and maintain social stability when daily water supply obstacles occur in cities. Based on the analysis of the hydrogeological conditions in the planning area of Changde City, the researchers in this paper delineated 5 groundwater emergency sources, and summarized the site selection principles of groundwater emergency sources in the same type. Besides, the feasibility assessment of water sources was conducted from three aspects of water quantity, water quality and production capacity. Two emergency water supply schemes under the minimum standard of 20 L/d and the general standard of 50 L/d per capita water consumption are considered, combining with the existing urban water supply network and groundwater exploitation well reservation. The emergency water supply demand could be satisfied by the existing water supply capacity of reserved wells under emergency water supply standards of 20 L/d per capita. While, the existing water supply capacity is insufficient in reserved wells of Hefu water source and Ludishan water source under emergency water supply standards of 50 L/d per capita. Therefore, the proposal of increasing production wells is put forward to adapt the emergency water supply demand.
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Key words:
- Changde City /
- emergency water sources /
- groundwater resources /
- water supply scheme
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