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Influences of Terrace Construction and Check Dam Silting-up
Authors
张翔
李占斌
+3 more
李鹏
贾莲莲
高海东
Publication date
1 January 2012
Publisher
Abstract
为了研究梯田建设和淤地坝淤积对流域土壤侵蚀的影响,本文首先建立了包含梯田、坡耕地、陡坡草地以及坝地在内的黄土高原丘陵沟壑区流域简化模型,并定义了流域的先锋期、过渡期以及顶级期三个状态,使用修正通用土壤流失方程(RUSLE)分析了不同时期的流域土壤侵蚀模数。结果显示:先锋期与顶级期是流域水土保持治理的极限状态,先锋期峁边线上部土壤侵蚀模数为299.56t×hm-2×a-1,下部土壤侵蚀模数为136.64t×hm-2×a-1,平均侵蚀模数为229.74t×hm-2×a-1;顶级期峁边线上部土壤侵蚀模数为39.10t×hm-2×a-1,下部土壤侵蚀模数为1.10t×hm-2×a-1,平均侵蚀模数为22.81t×hm-2×a-1;在过渡期,随着梯田面积比例的增加,峁边线上部土壤侵蚀模数呈指数减少,而随着淤积高度的增加,峁边线下部土壤侵蚀模数呈线性减少,文章最后对这一结论进行了实证分析。</span
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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