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首页> 外文会议>International Soil Conservation Organization Conference vol.1; 20020526-31; Beijing(CN) >Soil Erosion Regularity in Three Gorges Reservoir Area and its Controlling Measures
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Soil Erosion Regularity in Three Gorges Reservoir Area and its Controlling Measures

机译：三峡库区水土流失规律及其防治措施。

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摘要

The Three Gorges Reservoir Area is one of the most severe soil erosion in China. Serious erosion has degraded the soil productivity, deteriorated the ecological environment, and influenced the service life of Three Gorges Reservoir. The natural and social-economic factors which influence the soil erosion in Three Gorges Reservoir Area include topography, geological situation, vegetation, rainfall characteristics, human activity, soil feature, such as infiltration, antiscour ability, etc. Based on the relationship between these factors and soil erosion, several laws of soil erosion are systematically expounded and summarized. Those are: (1) According to the difference of topography, geological situation, the form and degree of soil erosion, four regionalizations of erosion are divided; (2) With the degradation of vegetation, the erosion area and erosion intensity are developed and deteriorated; (3) The erosion types are gradually erosion (such as sheet erosion and gully erosion) and abrupt erosion (such as gravity erosion); (4) The peak of soil erosion in sloping farmland comes forth from April to May, while the peak in river channel comes forth from July to September; (5) Sediment source mainly comes from slope land, land slide, mountain slump, and debris-mud flow. On the bases of sufficiently understanding soil erosion laws of Three Gorges Reservoir area, the control countermeasures which includes vegetation restoration, terracing on the slope, soil reservoir construction and comprehensive control of small watershed are pointed out.
机译：三峡库区是中国水土流失最严重的地区之一。严重的侵蚀降低了土壤生产力，恶化了生态环境，并影响了三峡水库的使用寿命。影响三峡库区水土流失的自然和社会经济因素包括地形，地质状况，植被，降雨特征，人类活动，土壤特征（如入渗，抗冲能力等）。基于这些因素之间的关系在土壤侵蚀方面，系统地阐述和总结了几种土壤侵蚀规律。它们是：（1）根据地形，地质情况，水土流失的形式和程度的不同，划分了四个侵蚀区域。 （2）随着植被的退化，侵蚀面积和侵蚀强度不断加剧和恶化； （3）侵蚀类型为逐渐侵蚀（如片状侵蚀和沟壑侵蚀）和突变性侵蚀（如重力侵蚀）； （4）坡耕地水土流失高峰出现在4月至5月，河道水土流失高峰出现在7月至9月。 （5）泥沙源主要来自坡地，滑坡，山崩和泥石流。在充分了解三峡库区水土流失规律的基础上，提出了植被恢复，坡地梯田，水库建设和小流域综合治理的防治对策。

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