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2012年7月拒马河流域发生罕见的暴雨洪水,暴雨中心涞源县王安镇降水量378.6 mm,为300~400年一遇暴雨。紫荆关水文站和落宝滩水文站发生30年一遇洪水,为有资料记载的第二大洪水。洪水进入下游平原区后,大部分补充了地下水。对暴雨前后地下水动态特征进行统计分析,表明“12·7”暴雨洪水后地下水埋深明显抬升。
In July 2012, a rare storm flood occurred in the Juma River basin. Rainfall occurred in Wangan Township, Laiyuan County, a rainstorm center, with a rainfall of 378.6 mm, a heavy rainfall of 300-400 years. A 30-year flood occurred at the Bauhiniakan Hydrographic Station and the Lopaukang Hydrological Station, the second largest flood recorded in the data. After the floods entered the lower reaches of the plains, most of them replenished groundwater. The statistical analysis of the dynamic characteristics of groundwater before and after heavy rains shows that the groundwater depth significantly increased after the “12.7” storm flood.