窟野河暴雨洪水泥沙特征分析

Analysis on Rainstorm, Flood and Sediment Characteristics of Kuye River

结合窟野河流域降水、洪水及泥沙数据,研究暴雨洪水泥沙特征,结果表明:窟野河流域年降水量呈递减趋势,且年内分配也极不均匀,年径流量总体呈下降趋势,流域输沙量年际变化较大,且年内分配极不均匀,6~9月产沙量占全年96%以上;窟野河泥沙空间分配不均且来源不同,王道恒塔站以上区域主要来自于汛期洪水冲刷且多为粗砂,神木站洪水含沙量峰值略迟于洪水洪峰,温家川站洪水过程与含沙量变化过程相关性较差,含沙量峰值出现时间明显早于洪峰出现时间;窟野河流域来沙量呈递减趋势。

Combined with the data of precipitation, flood and sediment in the Kuye River Basin, the article studies the characteristics of storm flood and sediment. The results show that the annual precipitation in the Kuye River basin is in a decreasing trend and the annual distribution is also very uneven, and the annum runoff generally declines, sediment discharge in the basin has a large interannual variation with very uneven distribution during the year, with the sediment yield accounting for over 96% of the total from June to September. The spatial distribution of sediment in the Kuye River is uneven and varies from one source to another. The area above Wandaoheng tower station mainly come from flood scouring in flood season and mostly are coarse sand. Shenmu station flood sediment concentration peak slightly later than the flood peak at flood. For Wenjiachuan station, the process beween the flood and and sediment content changing is poor correlation, the sediment concentration peak time was earlier than the peak time, the sediment from Kuyehe basin showed a decreasing trend.