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分析了2003年7月30日发生在黄河中游的特大暴雨洪水特性。本次暴雨持续时间短、强度大、范围小,黄甫、府谷水文站日降雨量分别为136mm和133mm。暴雨形成了黄河干支流洪水过程,黄甫、府谷、吴堡水文站洪峰流量分别为6670m3/s、12800m3/s和9400m3/s。黄甫川洪峰含沙量、平均含沙量均比历史洪水小;府谷水文站洪峰含沙量较小,水位较低。洪水演进过程中黄河干流洪峰流量削减较多,泥沙沿程淤积,府谷至吴堡区间淤积量约为2500万t。
The flood characteristics of heavy rainstorm occurred in the middle reaches of the Yellow River on July 30, 2003 are analyzed. The duration of this rainstorm is short, the intensity is large and the range is small. The daily rainfall of Huangfu and Fugu hydrological stations is 136mm and 133mm respectively. Rainstorm formed the flood of dry and tributary of the Yellow River. The peak flow of Huangfu, Fugu and Wubu hydrological stations were 6670m3 / s, 12800m3 / s and 9400m3 / s, respectively. Huangfuchuan flood peak sediment, the average sediment than the historical flood; Fugu hydrological station peak sediment concentration is small, the water level is low. During the process of flood evolution, the peak flow of the main stream of the Yellow River has been reduced sharply. Sediment deposition along the sediment and siltation in the Fugu-Wubao area is about 25 million tons.