区域性土壤流失预测方程的初步研究
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A PRELIMINARY STUDY ON THE REGIONAL PREDICTION EQUATION OF SOIL LOSSES
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    摘要:

    应用我国南方花岗岩侵蚀红壤区的径流小区观测资料,采用数值分析方法推导出适合花岗岩侵蚀红壤区,计算各次降雨吋土壤流失量和年土壤流失量方程:A1=4·ys·K·LS;并利用野外调查量测资料,推导出适合长江三峡低中山区的土壤流失方程:A2=(152.5D-1016)·R·LS·C-2.3利用上述方程可以预测特定区域的土壤流失量。

    Abstract:

    A predicting equation for soil loss is derived by means of numerical analysis of the data from the experimental plots on eroded red earth developed on granite in Southen China. The equation is A1=4·ys·K·LS where A1, is amount of soil losses y=5.459-0.472x1+0.128x2+1.715x3-14.041x4,x1, to x4, refer to rainfall, rainfall intensity, volume of runoff anti runoff coefficient respetively; K is erodibility and LS gradient-length of slope. This equation could be used for predicting the amount of soil losses in granite region of South China. Another predicting equation derived through soil erosion investigation and reservoir sediment measurement in the region of the Yangtze Gorges is A2=0.8351·R·K·LS·C-2.3,where A2 is soil losses,R and C are rainfall factor and coverage of vegetation respectively, K and LS are the same as mentioned above. By using this equation, the soil losses of the region of Yangtze Gorges could be calculated.

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杨艳生.区域性土壤流失预测方程的初步研究[J].土壤学报,1990,27(1):73-79. Yang Yansheng. A PRELIMINARY STUDY ON THE REGIONAL PREDICTION EQUATION OF SOIL LOSSES[J]. Acta Pedologica Sinica,1990,27(1):73-79.

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  • 在线发布日期: 2013-02-25
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