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径流及泥沙中~7Be含量分布与影响因素研究
Authors
张风宝
杨明义
Publication date
1 January 2007
Publisher
Abstract
通过分析次降雨下,来自坡耕地、荒草地、灌木林地径流小区径流、泥沙中7Be含量,发现径流中7Be浓度较小,均值为0.92 Bq/L,但次降雨过程由于受径流量的影响,随径流流失的7Be量较大。坡耕地小区随径流流失7Be占整个小区7Be流失量的11%~33%,对示踪结果影响较大。与地表土壤相比较,侵蚀泥沙中7Be含量较大,尤其是荒草地和灌木林地小区。坡耕地小区侵蚀泥沙颗粒分选性对泥沙中7Be含量影响不明显,它主要受侵蚀类型的影响,面蚀对侵蚀泥沙中7Be含量贡献最大
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018