7月 4日凌晨 3时 15分至 9时 ,子长县遭受了 5 0 0年不遇的特大暴雨洪水灾害 ,降水量为 195 3毫米 ,县河最大流量每秒达 46 70立方米 ,是正常流量的 2倍多。 4日晚至 5日 8时 ,再次发生强降雨达 111 8毫米。由于连续遭受强降雨和洪水袭击 ,造成人员伤亡 ,房屋倒塌 ,道路、通信 At 3:01 a.m. to 9 a.m. on July 4, Zichang County suffered a severe flood and flood disaster that hit 500 in 2003 with a rainfall of 195 3 millimeters and a maximum flow of 46,70 cubic meters per second to the county river, which is normal More than twice the traffic. On the 4th of the night to 8:00 on the 5th, another heavy rainfall of 111 8 mm occurred. Due to continuous heavy rains and flooding, casualties, housing collapses, roads, communications