摘要
四川中部丘陵是长江三峡库区泥沙淤积的主要来源地。在多年野外观测和调查研究的基础上,综合分析了土壤水力侵蚀的类型、特征和影响因素之后认为,川中丘陵土壤水力侵蚀以沟蚀为主,具有空间分布不均,“立体侵蚀”明显;季节差异大,侵蚀曲线呈“双峰”型,侵蚀高峰超前于降水高峰的特点。这是自然因素和人类活动综合作用的结果。减轻川中丘陵土壤水力侵蚀的对策是:(1)加强农田基本建设,大力推行坡改梯;(2)丘顶丘坡,造林种草;(3)改良耕作技术,实行轮作套种;(4)逐步建立和实行建房必须营造耕地的制度。
The hilly of central Sichuan basin is maily source place of sediment deposition in ThreeGorge reservoir of the Yangtze River. On the basis of field observation and investagetion for many years,after comprehensively analysis the type,features and influencing factors of soil water erosion,it's recognized that the soil water erosion mainly was gully erosion, which temporal distribution is not.uniform, 'stereo—erosion' is serious, seasonal change is obvious, erosion curve presents 'double — peak' type,the high peak of erosion gets ahead of that of precipitation. These were the results that natural factors and human action effect comprehensively. Strategies to decreace soil water erosion in hilly of the central Sichuan basin were as follow: (1) To strengthen farmland basic construction, and change slope land into terrace; (2)To plant tree and grass onto slope top and along gully bank; (3)To improve tillage technologe,and carry out rotation and interplanting; (4)To build up gradually and put into practice systems that constructing house must forestate tillage land
出处
《水土保持学报》
CSCD
北大核心
1992年第4期35-42,共8页
Journal of Soil and Water Conservation
关键词
川中丘陵
土壤侵蚀
防治
hilly of the central Sichuan basin
soil water erosion
gully erosion
preventive stratagies
