Distributed model for simulating runoff yield in the typical watershed of the purple soil region in Sichuan Province

Yuan Zaijian; Cai Qiangguo; Wu Shu′an; Zhang Mingzheng

Volume 22 Issue 4

Apr. 2006

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2006 > 22(4): 36-41.

Yuan Zaijian, Cai Qiangguo, Wu Shu′an, Zhang Mingzheng. Distributed model for simulating runoff yield in the typical watershed of the purple soil region in Sichuan Province[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2006, 22(4): 36-41.

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Distributed model for simulating runoff yield in the typical watershed of the purple soil region in Sichuan Province

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Received Date: June 05, 2005
Revised Date: October 08, 2005
Published Date: April 29, 2006

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Abstract

Abstract

According to the aggravation status of water loss and soil erosion in the purple soil region, Hemingguan watershed of Nanbu county in Sichuan Province was selected as study region and a distributed model of runoff based on the natural storage model was developed in order to quantitatively analyze the degree of soil erosion and water loss. The model takes plot of land as calculated unit and the parameters were inputted for each plot, then the runoff of each plot was calculated based on the mechanism of the runoff, finally, the total runoff was calculated by recursion algorithm from the peak of watershed. The model can also evaluate the effect of variation of land use and support practice on runoff, and simulate the runoff process of rainfall in each plot of land. The model was finally validated in Hemingguan watershed and the results showed that the proposed model could reasonably simulate rainfall-runoff in small watershed. The research can offer the evaluation of regional soil and water conservation.
- purple soil,
- natural storage model,
- distributed model of runoff,
- plot of land,
- recursion algorithm

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