【Key words】 vegetation recovery benefit; returning cropland to forest; loess hilly areas; soil erosion
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On the base of overland flow theory, by one-dimension kinetic wave model, the formula for overland flow is deduced, which includes configuration and land feature in loess donga.4.
根据坡面流理论，运用一维运动波模型，推导出了考虑黄土沟壑区地形地貌条件的坡面产流公式。 4．根据地下水动力学原理，对现有渗沟埋置深度的确定公式进行了分析评价，从路基正常工作状态出发，提出了考虑荷载作用深度及超高影响的单渗沟、双渗沟埋置深度计算公式。
参考来源 - 黄土沟壑区路基防排水技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and aft er management of small watershed in gully region of the loess plateau.
北部为黄土梁峁沟壑区。
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and after management of small watershed in gully region of the loess plateau.
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