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Assessment of Soil Loss Using WEPP Model and Geographical Information System
WEPP GIS Soil erosion Watershed
2015/8/14
Severe soil erosion has generally been regarded as a major cause of land degradation in arid and semi arid regions. A quantitative assessment of soil loss intensity is still scanty for developing appr...
Assessment of Soil Loss Using WEPP Model and Geographical Information System
Modeling WEPP GIS Soil erosion
2015/1/9
Severe soil erosion has generally been regarded as a major cause of land degradation in arid and semi arid regions. A quantitative assessment of soil loss intensity is still scanty for developing appr...
Comparison of Erosion and Runoff Predicted by WEPP and AGNPS Models Using a Geographic Information System
Modeling WEPP AGNPS Surface runoff Soil erosion
2009/1/13
The Water Erosion Prediction Project (WEPP) model and the Agricultural Non-Point-Source Pollution Model (AGNPS) were used in conjunction with a geographic information system (GIS) database to predict ...
应用WEPP进行进行重庆市水土流失动态监测研究
WEPP 水土流失 动态监测
2008/10/17
“应用WEPP模型进行重庆市水土流失动态监测研究”是由重庆市科委1999年立项支持的攻关科研项目（项目编号：1999-5703）。课题组已经完成了以下工作：通过实际径流小区观测及实验分析所获得的数据资料，参考WEPP模型运行机理，获得了进行侵蚀预测时需要的模型参数；分析WEPP模型所需的各个参数的文件结构，建立了WEPP模型所需的信息库；进行了水土流失的动态监测，监测结果表明，WEPP模型模拟值...
基于物理过程基础上的WEPP土壤水蚀预报模型将坡面侵蚀分为细沟侵蚀和细沟间侵蚀，建立了独立的细沟间模型和细沟模型。其中细沟侵蚀产沙方程从概念上可以预报细沟侵蚀过程，但没经实验或理论验证。该文经过理论分析表明，WEPP模型中的剥蚀率是水流含沙量的线性函数，并由给定的试验条件计算得到了函数中的参数。将理论分析结果和已有的实验结果进行了比较，验证了WEPP中的侵蚀产沙模型。同时将已得到的确定细沟剥蚀率的...
WEPP模型中细沟可蚀性参数估计方法误差的理论分析
2007/8/10
细沟土壤侵蚀在坡面土壤侵蚀占有重要地位。土壤可蚀性参数是WEPP模型中计算预报/计算细沟土壤侵蚀中极其重要的参数。WEPP模型现在采用的可蚀性参数是用长的细沟/径流小区试验以细沟侵蚀产沙估计得到的最大可能剥蚀率为基础获得的。该文分析了细沟侵蚀产沙随沟长的变化关系，分析了可蚀性参数估计误差的来源。从理论上推导出了计算现有WEPP可蚀性参数估计误差的计算方法。理论分析表明，对于限定性细沟，可蚀性参数...