短历时大降雨条件下河道输沙经验模型研究  

Empirical Model of River Sediment Transport under Short Duration Heavy Rainfall

作　　者：侯文娟 HOU Wen-juan(Water Conservancy Bureau of Zhaosu County,Yili 835600,Xinjiang,China)

机构地区：[1]新疆伊犁昭苏县水利局,新疆伊犁835600

出　　处：《水利科技与经济》2021年第6期59-62,共4页Water Conservancy Science and Technology and Economy

摘　　要：我国很多流域在夏季常遭遇历时短、强度高的暴雨,在暴雨和洪水的侵蚀作用下,地表沙土严重流失,研究短强降雨影响下河道输沙对于水土流失具有重要意义。为研究短历时大降雨条件下河道输沙变化趋势特征,基于M-K分析法、累积双曲线法及M-W-P法建立流域短历时大降雨条件下河道输沙经验模型,根据日降雨数据和历史摘录降雨数据准确建立不同雨强条件下河道累计输沙模型。结果表明,基于历史降雨摘录数据且雨强大于0.4 mm/5 min以上时模型准确度最高,更能够反映强降雨影响下流域产沙特性。Many watersheds in China often encounter short duration and high intensity rainstorm in summer.Under the erosion of rainstorm and flood,the surface sandy soil is seriously eroded.It is of great significance to study the sediment transport in river channel under the influence of short and heavy rainfall for soil and water loss.Based on the long-term and long-term rainfall data,a hyperbolic model is established for the study of the long-term rainfall and heavy rainfall.The results show that when the rainfall intensity is more than 0.4 mm/5 min,the accuracy of the model is the highest,which can reflect the sediment yield characteristics of the basin under the influence of heavy rainfall.

关 键 词：强降雨 不同雨强 降雨输沙模型 水土保持 

分 类 号：P333.4[天文地球—水文科学]