长江上游紫色土坡耕地土壤侵蚀^(137)Cs示踪法研究  

A Study on Soil Erosion Rates of the Purple Slope Cultivated Land Using Caesium-137 Technique in the Upper of the Yangtze River

作　　者：文安邦[1] 张信宝[1] 王玉宽[1] 张一云[2] 徐家云[2] 白立新[2] 

机构地区：[1]中国科学院,水利部成都山地灾害与环境研究所环境研究中心,四川成都610041 [2]四川大学物理系,四川成都610041

出　　处：《山地学报》2001年第S1期56-59,共4页Mountain Research

基　　金：国家自然科学基金 (编号 :498710 0 8);长江水利委员会水土保持局‘九;五’科技攻关项目资助。

摘　　要：运用1 37Cs示踪法对长江上游“长治”水土保持工程重点治理区的云贵高原区、川中丘陵区和三峡库区 8块紫色土坡耕地土壤侵蚀速率研究结果表明 ,影响紫色土坡耕地平均侵蚀速率的主要因子为坡度、坡长、降雨量和土壤粒度组成 ,四个研究区土壤平均侵蚀速率介于 75 8t km2 ·a- 1 ～ 985 4t km2 ·a- 1 ,计算值与长江上游类似地区径流试验场观测值基本一致。The upper Yangtze River is one of the most severely eroded areas in China. The purple Cultivated slope land is one of the important sources for river sediment in the mountain regions. The paper reports the results of a preliminary investigation of the potential of using ()^(137)Cs measurements on a purple sloping cultivated land in the upper Yangtze River.Soil samples were mainly collected from the purple cultivated slope land , and the ()^(137)Cs reference samples collected from a plain grassland or terrac...

关 键 词：紫色土 土壤侵蚀速率 137Cs法 

分 类 号：S157[农业科学—土壤学]