基于泉群流量与降水量相关性的明水泉域岩溶水强径流带识别

Identification of karst water strong runoff zone in Mingshui spring area based on correlation between spring discharge and precipitation

运用皮尔逊相关系数法分析了明水泉域各水文站月尺度最佳降水滞时,依据最佳降水滞时在旬尺度和日尺度条件下分别计算了2006—2013年泉群流量与各水文站降水量的皮尔逊相关系数,得出与泉群流量关系相对密切的水文站点,从而识别出明水泉域强径流带。结果表明:各水文站最佳降水滞时均为5个月;明水站、闫家域站和旭升站降水量变化与泉群流量过程有较大的一致性,对泉群流量的影响相对较大,3站所在位置可能存在明水泉域岩溶水强径流带。

Pearson correlation coefficient method was employed to analyze the best precipitation lag time at the monthly scale of each hydrological station in Mingshui spring area.According to the best precipitation lag time,the Pearson correlation coefficients of spring discharge and precipitation of each hydrological station from 2006 to 2013 were calculated at the ten-day scale and the daily scale,respectively.Thus the hydrological stations closely related to spring discharge were found out and the strong runoff zone in Mingshui spring area was identified.The results show that the best precipitation lag time of each station is 5 months.The precipitation changes of Mingshui Station,Yanjiayu Station and Xusheng Station are greatly consistent with the spring discharge,which have a relatively large impact on the spring discharge.The strong runoff zone of karst water-bearing medium in Mingshui spring area may exist at the location of three stations.