土壤侵蚀成因机制分析与模拟

本文对黄土丘陵沟壑区土壤侵蚀的成因机制与运动机理进行了深入探讨，分析了黄土地区高含沙火流通人的形成及其汇流过程，讨论了泥沙运动的基本模式。在此基础上对高含沙水流的运动机理及其挟沙力进行了力学模拟，分析了高含沙水流的流速分布及泥沙的垂线分布，构造了推移质泥沙的输沙模型。

The Analyses and Imitations of Cause Mechanism for Soil Erosion

This paper makes a thorough probe for cause of formation and motion mechanism for soil erosion in loess hills and gullies, and analyses the formation and converge process of flows containing lots of silts and sands in loess regions, and discusses the basic modelsof motion for silts and sands. On the basis of above menioned, the author makes the mechanics imitation for motion mechanism and abilities of carring silts and sands for flows containing lots of sludges and grits, and analyses current velocity distribution and vertical distribution of silts and sands for high sanded flows, and builds the models of delivery sands for siltsand sands of bed load. Meanwhile, the author also makes a deep analysis for dispersedstrengths among grains of sands and their abilities of carring sands for silts and sands oflaminar load, and deduces the function relations between delivery intensity and current flowintensity, and makes the mechanics analyses for cause of 'formation and mechanism of soilerosion.