Characteristics of karst development and the law of groundwater enrichment in Shazhouba area of Ruijin City
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摘要: 通过1∶5万水文地质和环境地质调查,利用钻探等技术手段研究瑞金市沙洲坝地区岩溶发育特征及地下水富集规律。结果表明:沙洲坝地区岩溶发育受地质构造、地层岩性、地形地貌等因素控制,该区岩溶发育不均一,小的溶孔直径仅0.1 cm,大的溶洞洞高231.92 m,造成了岩溶含水层富水性具有明显差异;该区地下水的赋存和富集与岩性、构造、岩溶发育程度以及补给条件密切相关。综合分析认为:岩溶主要在浅部沿断裂、可溶岩层面、质纯的可溶岩等部位发育;岩溶地下水主要在断裂带及其复合部位、地下水排泄区及主要径流带、褶皱及断裂的转折部位富集。研究沙洲坝地区岩溶发育特征及地下水富集规律,可为重要工程选址建设和岩溶塌陷等地质灾害防治提供科学依据。Abstract: Based on the 1:50 000 hydrogeological and environmental geological survey, the characteristics of karst development and the law of groundwater enrichment in Shazhouba area of Ruijin City were studied by means of drilling. The results show that the karst development is controlled by geological structure, topography and other factors, leading to uneven karst development in this area. The small solution hole is only 0.1 cm, while the large one is 231.92 m high. The heterogeneity of karst development results in the obvious difference of water content of karst aquifer, and the occurrence and enrichment of groundwater are closely related to lithology, structure, karst development degree and recharge condition. According to the comprehensive analysis, the karsts mainly develop in the shallow part along the structure, the layer of the soluble rock, and the pure karst. Karst groundwater is mainly concentrated in fault zones and their composite parts, groundwater discharge areas and main runoff zones, shallow parts, folds and turning points of fault structures. To find out the characteristics of karst development and the law of groundwater enrichment in Shazhouba area may provide scientific basis for the site selection of important projects construction and the prevention and control of geo-hazards such as karst collapse.
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Key words:
- karst development /
- groundwater /
- enrichment laws /
- Shazhouba area of Ruijin City /
- Jiangxi Province
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