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首页> 外文OA文献 >Sediment Yield Modeling and Identification of Erosion Hotspots in Tropical Watersheds: The Case of Upper Ruvu Catchment in Tanzania
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Sediment Yield Modeling and Identification of Erosion Hotspots in Tropical Watersheds: The Case of Upper Ruvu Catchment in Tanzania

机译：热带流域侵蚀热点泥沙产量模拟与识别 - 以坦桑尼亚上Ruvu流域为例

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摘要

The main objective of this study was to test the sediment prediction capability of the Water Erosion Prediction Project (WEPP) model on tropical watersheds and also identify erosion hotspot areas. The maximum total discharge at the watershed outlet was 3,462m3/s. Runoff also varied with soil type in all four watersheds. The highest average annual runoff depths occurred on areas with high percentage of ferralic cambisols and humic acrisols soils. The lowest runoff depth was in areas with high percentage of rhodic ferralsols and eutric leptosols soils in Kibungo chini. The soil loss and sediment yield had the same relationship as the runoff changes. The highest and lowest total average annual soil loss rate was estimated in Mfizigo juu and Kibungo chini respectively. The cultivated land contributed to over 81% of soil loss and 86% of sediment yield in all four scenarios. The overall spatial results maps indicated WEPP model can help managers to implement necessary precaution measures to prevent sediment yield and soil erosion.
机译：这项研究的主要目的是检验热带流域水蚀预报项目（WEPP）模型的泥沙预报能力，并确定侵蚀热点地区。流域出口处的最大总排放量为3,462m3 / s。在所有四个流域中，径流也随土壤类型而变化。最高年均径流深度发生在高铁草甘露醇和腐殖酸cri土的比例较高的地区。最低的径流深度是在基本古中国的红壤性铁土和中性钩藤土壤含量高的地区。土壤流失与产沙量与径流变化具有相同的关系。分别在Mfizigo juu和Kibungo chini中估计了最高和最低的年平均总土壤流失率。在所有四种情况下，耕地造成了超过81％的土壤流失和86％的泥沙产量。总体空间结果图表明WEPP模型可以帮助管理人员实施必要的预防措施，以防止沉积物增加和水土流失。

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    Msaghaa Juliana J.;

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  • 年度 2012
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