西辽河流域平原区地下水动态补给研究

基于分布式水循环模拟模型MODCYCLE，建立强人类活动影响下西辽河流域水循环模拟模型，量化西辽河平原地下水补给组成，分析地下水动态补给情况及年际、年内变化。分析结果表明：西辽河流域平原区地下水补给以降水入渗补给为主，与年降水量直接相关。随降水减少，降水入渗补给比重减少，河道入渗补给及灌溉回归补给比重增加。地下水补给的年内变化差异较大，且与年内降水分布直接相关。研究结果可为西辽河平原地下水资源可持续开发利用提供依据

Study on groundwater dynamic recharge within plain of West Liaohe River Basin

Based on a distributed hydrological model-MODCYCLE，a model for simulation of the water cycle of the West Liaohe River Basin under the impact of strong human activities is established herein，and then the composition of the recharge for the groundwater therein is quantified and the status of the dynamic recharge of the groundwater as well as its annual and monthly variations are analyzed. The analysis shows that the groundwater recharge within the plain of the West Liaohe River Basin mainly consists of the precipitation infiltration and is directly related to the annual precipitation. Therefore，the proportion of the recharge from the precipitation infiltration is decreased along with the decrease of the precipitation，while the proportion of the recharge composed of both the infiltration from river and the return-flow of irrigation is increased. The difference among the monthly variations of the groundwater recharge is larger and is directly related to the precipitation distribution within a year.The study can lay a basis for the sustainable development and utilization of the groundwater resources within the plain of the West Liaohe River Basin.