| 流域产沙模型的研究 |
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| 引用本文： | 汤立群.流域产沙模型的研究[J].水科学进展,1996,7(1):47-53. |
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| 作者姓名： | 汤立群 |
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| 作者单位： | 河海大学水资源水文系 南京 210098 |
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| 基金项目： | “八·五”国家重点科技攻关项目;河海大学水资源开发利用国家专业实验室开发基金资助项目 |
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| 摘 要： | 由坡面泥沙颗粒的动力平衡条件,推导出坡面上细颗粒泥沙的起动切应力,由坡面径流的剩余输沙能力,导得坡面径流的侵蚀量计算公式,与文献4]的雨滴溅蚀量计算公式一起,构成了概念清楚、过程明确、结构完整的流域产沙模型。产沙量取决于水流挟沙能力与可供沙量的对比关系,若水流挟沙能力小于供沙量,则产沙量等于水流挟沙能力;反之,水流将进一步冲刷表土,形成径流侵蚀,产沙量就等于供沙量与径流侵蚀量之和。据此,可计算出坡面和流域产沙量。模型在岔巴沟流域上应用,结果令人满意。
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| 关 键 词： | 水流 挟沙能力 输沙能力 流域泥沙 模型 |
| 收稿时间： | 1994-07-02 |
Study on Sediment Yield Model of Basin |
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| Tang Liqun.Study on Sediment Yield Model of Basin[J].Advances in Water Science,1996,7(1):47-53. |
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| Authors: | Tang Liqun |
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| Affiliation: | Dept. of Water Resources and Hydrology, Hohai University, Nanjing 210098 |
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| Abstract: | According to the dynamic balance condition of the soil particle on the sloping land,the critical shear stress of the fine silt on the sloping land is deduced. Based on the surplus transport capacity of the overland flow,a calculation formula of the soil erosion of the overland flow is obtained. With the calculation formula of the rainfall splash in the reference four,a mathematical model with clear conception and definite process and complete structure of sediment yield from watershed is developed. Sediment yield depends on the comparison relation of the transport capacity of flow and supply sediment. If transport capacity of flow less than supply sediment,the seiment yield is equal to the transport capacity of flow. Otherwise,the soil will be eroded by the overland flow,and the sediment yield is addtion of the supply sediment and runoff erosion. Therefor, the sediment yield from sloping land and watershed can be calculated. The model is verified with measured data of Chabagou catchment and the results are satisfactory. |
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| Keywords: | water flow transport capacity watershed sediment model |
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