岔巴沟流域分布式产流产沙的计算机模拟

建立了基于场次洪水的分布式流域产流产沙模型,该模型能够模拟出流域在不同土地利用类型下的径流和产输沙的时空过程,模型能反映下垫面因子空间分布不均和人类活动对流域产流产沙的影响,进而为流域内水土保持措施配置提供技术支撑和科学依据.经岔巴沟流域实测资料验证,计算值与实测值符合良好,基本反映了流域产汇流及侵蚀产输沙的物理过程.

Computer Simulation of Distributed Runoff Yield and Sediment Yield in Chabagou Catchment

A distributed model for runoff yield and sediment yield in basins based on isolated storm events was developed. The model could respectively simulate space and time processes of runoff formation and sediment yield for the watersheds with various using type of land and might reflect the effect of the spatial heterogeneity of underlying surfaces and man kind activities on the runoff yield and sediment yield in watershed. Thus the model could provide technical support and scientific basis for the basin soil and water conservation measures. The model was finally calibrated and validated by measured data in the Chabagou watershed. Results show that the proposed model can reasonably simulate rainfall-runoff-sediment transport in watershed and basically reflect the runoff sediment erosion of the physical processes of the basin.