中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
利用7Be研究侵蚀性降雨前后坡面土壤侵蚀空间分布特征

文献类型:期刊论文

作者贺秀斌; 张信宝
刊名水土保持通报
出版日期2005
卷号25期号:2页码:16-19
关键词7Be 侵蚀性降雨 土壤侵蚀 空间分布
其他题名Application of 7Be to Study Spatial Distributed Characteristics of Soil Erosion on Hillslopes Before and After Erosive Rainfall Occurrence
通讯作者丁晋利
合作状况国内
中文摘要结合野外调查方法,利用7Be示踪法研究了直形坡侵蚀性降雨发生前后坡面土壤侵蚀空间分布特征。结果表明,侵蚀性降雨发生前,在20m坡长范围内,7Be在坡面不同部位分布的差异性不显著;而全年侵蚀性降雨结束后,7Be在坡面不同部位分布有显著差异。侵蚀性降雨发生后表层土壤中7Be含量及其侵蚀性降雨发生前后表层土壤7Be含量的差值皆随坡长的增加而减少,表明坡面土壤侵蚀随坡长增加呈增加趋势。坡面不同部位发生剥蚀或沉积过程有较大的差异,坡面上部距分水岭0~5m坡长范围内主要发生沉积现象;而在8~15m坡长范围内,土壤侵蚀以剥蚀过程为主,且土壤侵蚀最严重。
英文摘要The spatial distributed characteristics of soil erosion on straight hillslopes before and after erosive rainfall are studied with 7Be trace method and field investigation. The results showed that within 20 m of slope length, 7Be inventory at 0~2 cm deepth of soil profile in different sloping locations was not significant before occurrence of erosive rainfall, but after occurrence of erosive rainfall in 2004, 7Be inventory in different sloping locations was great significant. 7Be inventory at 0~2 cm deep after occurrence of erosive rainfall and difference values of 7Be inventory before and after erosive rainfall occurrence decreased as slope length increased with 20 m slope length. This indicated that soil erosion increased generally as the increase of slope length. There are great differences in detachment or deposition process at different sloping locations. At 0~5 m slope length of the upper slope, deposition process was dominant; but at 8~15 m of slope length, detachment was dominant, where soil erosion was very severe.
分类号S157.1
资助信息国家自然科学基金西部重大研究计划项目(90302001);中国科学院知识创新重要方向项目(K2CX3-SW-422)
语种中文
公开日期2011-05-27
源URL[http://ir.imde.ac.cn/handle/131551/3186]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
推荐引用方式
GB/T 7714
贺秀斌,张信宝. 利用7Be研究侵蚀性降雨前后坡面土壤侵蚀空间分布特征[J]. 水土保持通报,2005,25(2):16-19.
APA 贺秀斌,&张信宝.(2005).利用7Be研究侵蚀性降雨前后坡面土壤侵蚀空间分布特征.水土保持通报,25(2),16-19.
MLA 贺秀斌,et al."利用7Be研究侵蚀性降雨前后坡面土壤侵蚀空间分布特征".水土保持通报 25.2(2005):16-19.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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