辛安泉系统岩溶地下水降水补给滞后分析研究

辛安泉域是山西第二大岩溶泉,是长治市生活主要供水水源,根据其地质和含水岩性特征,从其补径排规律上,分析了泉域接受降水补给的年内和年际特点.并建立其裸露区降水补给模型.得出降雨补给泉水滞后6a以上,最长可达10a,降水丰枯与泉水的不一致变化趋势.近年降水减少是泉水流量下降的主要原因,应合理开采,以保泉水常流不竭.

Time Lag of Rainfall Recharge to the Karst Groundwater in Xin'an Springs

Xin'An springs are the second largest karst spring in Shanxi province. It is the main water supply source of the Changzhi city.According to its geology and aquifer characteristic,this paper makes up in a diameter row of rule from it,analyzed the rainfall recharge features of the springs within and between different years based on the recharge and discharge pattern.A precipitation recharge model was established for the bare recharge zone.It was found that rainfall recharge time lag is above 6 years,and may be along as 10 years,and the variation of precipitation is not consistent with the spring discharge.The precipitation reduction in recent years is the main cause for flow reduction of the springs.Rational development is necessary for sustainable use of the springs.