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受冷空气和副高外围暖湿气流共同影响,7月21～22日河北省发生“96·8”以来最大一次暴雨洪水过程。保定北部、廊坊北部、承德南部、唐山北部降特大暴雨,暴雨中心最大雨量王安镇349mm(最大6h降雨量274.6mm,相当于200年一遇)。暴雨引发大清河、北三河、滦河水系部分河道发生较大洪水,大清河系拒马河紫荆关水文站洪峰流量2580m~3/s,达20年一遇。北三河系青龙湾减河土门楼水文站最大流量1090m~3/s,滦河水系潵河蓝旗营水文站洪峰流量1890m~3/s,均超过20年一遇。
By the cold air and the subtropical peripheral warm and humid air flow together, July 21 ~ 22 occurred in Hebei Province “96.8 ” since the largest storm flood process. Northern Baoding, northern Langfang, southern Chengde, northern Tangshan heavy rainfall, rainstorm center maximum rainfall Wanganzhen 349mm (maximum 6h rainfall 274.6mm, equivalent to 200 years in a case). Heavy rains triggered a large flood in the Daqing River, the Beisan River and the Luanhe River, and the flood peak flow of the Zijingguan Hydrologic Station in the Juqing River was 2580m ~ 3 / s in Daqing River, reaching a maximum of 20 years. The maximum flow rate of Tumen House Hydrologic Station in the North Third Tributary of Qinglong Bay is 1090m ~ 3 / s, and the peak discharge of Lanqiying Hydrological Station in Luanhe River system is 1890m ~ 3 / s, both exceeding 20 years.