Mt.Jinfo,a karst dynamic system monitoring site,lies in Nanchuan city,Chongqing province.The data from the site′s automatic records(CTDP300) indicates that the karst dynamic system is highly sensitive to the environment.The physico-chemical variation of the epikarst spring water is quite different under different climatic condition.In normal days without rainfall,water temperature and air temperature have the same variation,and its peak zone lags behind the top temperature for several hours.This is probably...