阜平神仙山岩溶水系统水文地质特征及岩溶水开发利用研究

Study on hydrogeological characteristics and karst water exploitation and utilization of Shenxian Mountain KarstWater system in Fuping

[研究目的]岩溶水是我国北方城镇的主要水源,通过开展阜平神仙山岩溶水系统水文地质特征研究,为阜平岩溶水合理开发利用提供重要参考。[研究方法]本次主要以阜平神仙山岩溶水系统为研究对象,通过研究岩溶形成的地质背景、岩溶发育特征、含水层结构、地下水循环、岩溶水水化学特征等,系统总结了研究区岩溶水系统的水文地质特征。[研究结果]阜平神仙山岩溶地下水是相对独立的岩溶水系统,岩溶水系统边界主要包括碳酸盐岩与变质岩边界、阻水断裂构造构成的隔水边界和地表地下分水岭边界;岩溶水系统分为蓟县系和长城系白云岩岩溶裂隙含水层和奥陶系-寒武系上统灰岩岩溶裂隙含水层双层结构。阜平神仙山地区大气降水是地下水的主要补给来源,大气降水沿着裂隙入渗补给地下水,以金龙洞大泉(地下河)形式自然排泄,水量5382~75466 m^(3)/d,泉水中锶含量在0.58~1.28 mg/l,达到《饮用天然矿泉水》(GB 8537—2018)界限指标。[结论]阜平神仙山地区岩溶发育,形成了相对独立的岩溶水系统,地下水在其系统内循环。宜在金龙洞地下河附近修建地下挡水建筑物,形成地下岩溶水库,具有可观的开发利用价值。

This paper is about the research on the Karst Water system.[Objective]Karst water is the main water source of cities and towns in northern China.In this paper,the hydrogeological characteristics of the karst water system in Shenxian Mountain in Fuping are studied.The research results can provide an important reference for the rational development and utilization of karst water in Fuping.[Methods]This paper mainly takes the karst water system of Shenxian Mountain in Fuping as the research object,and systematically summarizes the hydrogeological characteristics of the karst water system in the study area by studying the geological background of karst formation,karst development characteristics,aquifer structure,groundwater circulation,and karst water chemical characteristics.[Results]The groundwater system of karst of Shenxian Mountain in Fuping is a relatively independent karst hydrologic system.Karst hydrologic system boundary consists of carbonate rock and metamorphic rock boundary,the water separation boundary formed by water resistance fault structure and the surface underground watershed boundary.The karst water system is divided into dolomite karst fissure aquifer of Jixian system and Changcheng system and the limestone karst fissure aquifer of Ordovician-Cambrian system.The atmospheric precipitation in Shenxian Mountain area of Fuping is the main source of groundwater recharge.The atmospheric precipitation infiltrates along the cracks to recharge the groundwater.The karst groundwater in Fuping Shenxian Mountain is excreted in the form of Jinlongdong spring(underground river),with a water volume of 5382-75466 m^(3)/d.The strontium content in the spring water is 0.58-1.28 mg/l,which reaches the limit index of'drinking natural mineral water'(GB 8537-2018).[Conclusions]Karst develops in Shenxian Mountain area of Fuping,forming a relatively independent karst water system,and groundwater circulates in the system.It is appropriate to build underground water retaining structures near the Jinlongdong underground river to form underground karst reservoirs,which has considerable development and utilization value.