柳林泉域降水补给的时滞研究

The Time-lag between Precipitation and Discharge in liulin Spring Basin

柳林泉位于山西省柳林县东川河河谷,是中国北方最大的岩溶泉之一。1984～2005年间的平均流量为3.29 m^3/s。流域内的大气降水是泉水的主要补给来源。根据柳林泉域水文地质条件的灰色系统特征,通过对泉域降水补给的时滞问题研究,提出了带有时滞的灰色关联分析模型。在此基础上,运用该模型对泉域不同地区的降水量与泉水流量进行了时滞分析。结果表明,柳林泉域不同区域的降水对柳林泉域的补给时滞存在差异。离石、中阳和方山的降水时滞分别为3 a、4 a和6 a。该方法可应用于山西省其它岩溶大泉的岩溶水动态分析。

Liulin Spring,one of the largest karst springs in North China,is located in Dongsanchuan River Valley of Liulin County,Shanxi Province.From 1984 to 2005,the average discharge of Liulin Spring was 3.29 m^3/s.The precipitation of the area is the main recharge source of the spring.The relationship between precipitation and the spring discharge is an important issue for exploitation and conservation of the karst water.In this paper,we probe into the problem of the time-lag from the precipitation to the supply of the Liulin Spring.Based on the grey-system characteristics of the spring-basin＇s hydrogeologic conditions,a time-lag-existing grey incidence analysis model is put forward.By using the model,the time-lag between the precipitation and the discharge is analyzed for Lishi City,Zhongyang County and the Fangshan County.The results showed that the time-lag between the precipitation of three regions and the discharge is 3 years for Lishi City,4 years for Zhongyang County and 6 years for Fangshan County.The approach used in this paper may be applied in the similar karst spring areas in Shanxi province.