Comprehensive study on groundwater emergency sources: A case study of Tangshan plain area
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摘要: 为规范地下水应急水源地勘查、评价和研究内容及程序,以唐山市平原区地下水应急水源地为例,运用综合分析和数值模拟法,针对应急水源地的供水特征和生态环境约束,总结了地下水应急水源地的选址原则,探讨了地下水应急水源地研究内容和研究步骤,提出了地下水应急开采量概念。通过研究查明了水文地质条件,确定应急水源地位置; 建立了地下水流模型; 以地质环境为约束,以可持续开发利用为前提条件,评价了应急开采量和地下水资源恢复能力。对唐山市平原区地下水应急水源地的研究表明,该水源地距离现有水源地较远,水文地质条件、补给条件和水质较好,地下水应急水源地的应急开采量约9×104 m3/d,停采后地下水资源恢复能力较好。研究成果对地下水应急水源地的勘查和评价具有指导意义。Abstract: To calibrate the exploration, assessment, study content and procedures of groundwater emergency sources, the authors took the plain area of Tangshan as a case study in this paper. Comprehensive analysis and numerical modelling were applied to summarize the locating principle of groundwater emergency sources, according to the characteristics of water supply and environmental constrain. The research contents and steps of the groundwater emergency sources were discussed, and the concept of groundwater allowable withdrawal were put forward. The research results include the identification of hydrogeological conditions and location of groundwater emergency sources, establishment of groundwater model, and assessment of emergency withdrawal and restorability of groundwater resource, with the consideration of environment constrain and sustainable development and utilization. The research about groundwater emergency sources in the plain region of Tangshan City indicates this groundwater source is far from the current water source, with good hydrogeological and recharge condition, and preferable water quality. The emergency withdrawal is about 9×104 m3/d, and the restorability is good after pumping stops. These results exhibit guidance for exploration and assessment of groundwater emergency sources.
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