2021年强降水影响下的海河平原地下水动态特征研究

Groundwater Dynamics in Haihe River Plain under the Influence of Severe Rainfall in 2021

2021年7月—10月,海河平原出现多次强降水过程,降水呈现持续久、范围广、强度大的特点。受此影响,海河平原7月末浅层地下水平均埋深13.60 m,水位较该月初上升1.68 m,恢复至2018年春灌前水位水平。10月10日达到水位最高点,较7月1日累计上升3.45 m。水位上升区与降水集中区、第四系强入渗区和低水位区相一致,低水位区更有利于获得持续补给。暴雨洪水对于缓解海河平原地下水系统的超采现状具有积极作用。

There was a continuous heavy precipitation processes occurred in Haihe River Plain from July to October in 2021,which showed the characteristics of long duration,wide range and high intensity.Affected by this,the average buried depth of shallow groundwater was 13.60m on July 31th,the water level had increased by 1.68m compared with July 1st.The water level had returned to the level before spring irrigation in 2018.The water level reached the highest point on October 10th,with a cumulative increase of 3.45m compared with July 1st.The rising water level area is consistent with the precipitation concentration area,the strong infiltration area of Quaternary and the low water level area.And the low water level area is more conducive to sustainable recharge.Rainstorm flood plays a positive role in alleviating the overexploitation of groundwater system in Haihe Plain.