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1.“7·21”暴雨洪水成因一场暴雨未必导致洪水,而洪水基于暴雨产流。据大清河系多年1日、3日、7日最大降雨量分布情况得知,河系自北向南有3个暴雨中心,均位于河系西部太行山迎风坡,分别是紫荆关、司仓、阜平。暴雨中心的形成是天气系统和地形系统综合作用的结果。一是天气系统。大清河系位于海河
1. “7 .21 ” storm flood causes a heavy rain may not lead to floods, floods based on storm runoff. According to the distribution of the largest rainfall on the 1st, 3rd and 7th in the Qinghe River system for many years, it has been learned that there are 3 heavy rain centers in the river system from north to south, all of which are located on the windward slope of the Taihang Mountains in the west of the river system. They are Zijinguan, level. The formation of a rainstorm center is the result of a combination of weather and topography systems. First, the weather system. Qinghe Department is located in Haihe