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首页> 外文期刊>Journal of Degraded and Mining Lands Management >Morphometric analysis and prioritization of watersheds for soil erosion management in Upper Gibe catchment
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Morphometric analysis and prioritization of watersheds for soil erosion management in Upper Gibe catchment

机译：吉贝河上游流域水土流失治理的形态计量学分析和优先次序

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As morphometric investigation is connected to prioritization of watershed, morphometric analysis has got a significance role in light of soil and water conservation. In this study, an endeavour for the examination of point by point morphometric analyses of sub-basins was accomplished through the measurement of linear and shape parameters by using ArcGIS-9.3 software. Specifically, linear and shape morphometric parameters like stream length, stream order, drainage density, stream frequency, bifurcation ratio, Length of overland flow, basin perimeter, form factor, compactness coefficient, elongation ratio has been considered. The SRTM DEM (30 x 30 m) is processed for the delineation resulting in 61 sub-basins. The morphometric parameters which affect the soil erodibility are considered to organize the sub-basins and relegate positions on the premise of their association with erodibility to get compound parameter (Cp) esteem. Based on the value of Cp the sub-basin with the lowest Cp value was given the highest priority and then categorized the sub-basins into three classes as high, medium and low in terms of priority. Accordingly, high priority zone comprises 11 sub-basins, medium 19 and low 31 sub-basins. The sub-basins which are falling under high priority were a great deal more defenceless to soil disintegration and ought to be given high need for land preservation measures.
机译：由于形态计量学与流域划分的优先级相关，因此形态计量学分析在水土保持方面具有重要作用。在这项研究中，通过使用ArcGIS-9.3软件测量线性和形状参数，完成了对子盆地的逐点形态分析检查的工作。具体而言，已考虑了线性和形状形态参数，例如流长，流序，排水密度，流频率，分叉比，陆流长度，流域周长，形状因数，压实系数，伸长率。对SRTM DEM（30 x 30 m）进行处理，以形成61个子流域。在影响土壤易蚀性的形态学参数的前提下，考虑它们与易蚀性的关系来组织子流域和放水位置，以获得复合参数（Cp）的估计值。基于Cp的值，具有最低Cp值的子流域被赋予最高优先级，然后按照优先级将子流域分为高，中和低三类。因此，高优先级区域包括11个子流域，中19个子流域和低31个子流域。处于高度优先地位的子流域对土壤崩解的抵抗力更大，应该高度重视土地保护措施。

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