通辽市科尔沁区地下水动态监测与分析

THE DYNAMIC MONITORING AND ANALYSIS GROUNDWATER IN TONGLIAO CITY KEERQIN DISTRICT

内蒙古通辽市科尔沁区位于通辽市中部西辽河平原区。本文以科尔沁区近30多年地下水动态监测数据(地下水水位)为依据,分析了科尔沁区地下水位变化规律与地下水位持续下降的原因,提出抑制地下水位下降的有效途径。结果表明:科尔沁区地下水平均埋深年内变化的一般规律是:地下水位1月达到最高,2~3月开始逐渐下降,4~8月地下水位持续下降,且下降幅度达到最大,8月地下水位为全年最低,9~12月平均地下水位逐渐回升;1999年以来科尔沁区地下水埋深整体下降迅速,地下水平均每年下降0.36 m,从1980~2010年,平均每年下降0.17 m;降水、地表水渗漏和地下水开采是影响地下水动态变化的主要因素。

Inner Mongolia Tongliao city Keerqin district is located in the middle of Tongliao city west Liaohe plain. This paper arranged the groundwater dynamic monitoring data( groundwater level) of 30 years in Keerqin district. Analyse the change rule of groundwater level in Keerqin district and the reason that the groundwater level decreased continuously. And put forward the effective ways to inhibit drawdown. The results showed the average groundwater depth change rule during the year in Keerqin district. The groundwater level reached the highest in January and decreased gradually in February ~ March. It decreased continuously in April ~August. Furthermore,the extent of reduction reached the maximum. The groundwater level in August is the lowest in the all year.The average groundwater level recovered gradually in September- December. The groundwater depth decreased rapidly as a whole in Keerqin district since 1999 year. The groundwater level decreased 0. 36 m per year on average. Since 1980 ~ 2010 year,it decreased0. 17 m per year on average. The rainfall,surface water leakage and groundwater exploitation are the main factors to influence the dynamic change of groundwater.