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首页> 外文会议>International Soil Conservation Organization Conference vol.4; 20020526-31; Beijing(CN) >Inquiry for a Calculated Method of Soil Loss Amount from Irrigular Slopes
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Inquiry for a Calculated Method of Soil Loss Amount from Irrigular Slopes

机译：坡面土壤流失量计算方法的探讨

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摘要

With regards to calculation of soil erosion amount in irrigular slopes, a method to calculate topographical factor LS value put forward by foster and weichmeier was applied. The method was not used well in practice due to without considering change of the irrigular slope curvature and rough slope grading. In fact, however, the natural slope shapes are very complex. Using generalised slope shapes was bound to lead to loss of some imformation. Thinking to solve the problem is to use crossline Between the irrigular slope and its direction of waterflow slope shape lines to present irrigular slope. The irrigular slope is replaced by even slope under the same conditions (to pography, soil ect) except for different slope gradients. Because soil erosion amount between both is equal, and erosive energy is also same. Based on the theory, a method to look for enquivalent even slope under the model of over infiltration runoff was found. The mothed is very simple, without generalised error and confirmed in the field experiment.
机译：在计算坡地土壤侵蚀量方面，采用了福斯特和魏克迈尔提出的计算地形因子LS值的方法。该方法由于未考虑周缘边坡曲率变化和坡度变化而在实践中使用不佳。然而，实际上，自然斜坡形状非常复杂。使用广义的斜坡形状势必导致某些信息的丢失。解决该问题的思路是利用不规则边坡与水流边坡形状线之间的交线来表示不规则边坡。在相同的条件下（对摄影，土壤等），除了不同的坡度梯度外，平缓坡度被平整坡度代替。因为两者之间的土壤侵蚀量相等，所以侵蚀能也相同。在此基础上，找到了一种在过渗径流模型下寻找等效平坡的方法。该方法非常简单，没有普遍的错误，并且在现场实验中得到了证实。

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