陕北岔巴沟流域次暴雨产沙模型的研究

Study on the storm-sediment yield model of the Chaba gully basin

本文通过对陕北岔巴沟小流域实测降雨、径流和泥沙资料的分析,获得了用有效降雨强度和有效降雨量表示的次暴雨产沙量经验模型。用该模型计算次暴雨产沙量、年产沙量和多年平均产沙量具有一定的精度。文中还探讨了用次暴雨产沙模型分析水土保持工程的减沙效益以及拟定侵蚀性暴雨标准的方法。

Acccording to the analysis on the field data of precipitation,runoff and sediment yield from the Chaba Gully Basin in northern Shaanxi Pro- vince,an empirical sediment yield model has been established by using the effective amount and intensity of the precipitation in storms,Sediment yield in one storm or in a long period calculated by the model agrees quite well with measured data.On the basis of the model,the effect of the soil conservation works and the standard of critical erosive precipita- tion have been discussed in this paper.