布置植物“柔性坝”河道冲淤计算及数值模拟

Silt Calculation and Numerical Simulation of River with Vegetation Flexible Dam

为了解决我国的河流泥沙灾害,尤其是新疆的防沙、治沙和水土流失问题,通过室内物理模型试验的初期成果,经过理论分析,在物理模型试验的基础上建立相应的数学模型,对沙棘植物"柔性坝"过流水动力学特性的几个方面进行了深入分析,并尝试推导了一些相应的公式。对植物坝前上游段推移质泥沙的输移特性进行了研究,在试验的基础上,运用一维水沙数学模型,进行了植物坝前壅水区内河床冲淤计算的数值模拟。结果表明,计算值与实测值吻合较好,具有一定的实用价值。利用沙棘植物"柔性坝"来治理泥沙、减少泥沙危害,是一种全新的泥沙治理理念。它将生物措施和流体力学原理相结合,并且充分利用了两者的优势。

In order to solve river sediment disaster in our country,particularly the problems of sand prevention and soil erosion in Xinjiang.According to the indoor physical model experiment result,based on theories analysis and physical model experiment,the mathematics model is established to study a few aspects of hydrodynamic characteristic of sea buckthorn vegetation Flexible Dam and tried to deduce some homologous formulas.The transportation characteristic of bed load sediment of upstream vegetation dam is studied.Base on experiment,utilizing one-dimensional flow sediment mathematical model,the numerical simulation of bed silt before vegetation dam is conducted.The result shows that calculating result is similar to observation result.Making use of the sea buckthorn vegetation Flexible Dam to manage sediment and reduce sediment bane is a new kind of sediment prevention approach.It combines biologic measure together with fluid mechanics principle,and fully makes use of the advantages of the both.