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黄土丘陵区近10年典型小流域对侵蚀环境演变的泥沙响应
Authors
刘普灵
张宁宁
Publication date
1 January 2017
Publisher
Abstract
针对近年来黄河泥沙的锐减现状,以2003—2011年国家退耕还林工程实施效果的显现期为背景,采用典 型流域剖析的方法,深入研究了近10a来黄土丘陵区典型流域侵蚀泥沙总量以及年际变化量。结果表明:小流 域土壤侵蚀强度大幅度下降,年平均侵蚀模数不足500t/(km2·a),下降至退耕还林还草工程实施以前的8.3%; 如不考虑建坝初期2003年的特殊状况,小流域2004—2011年侵蚀模数平均值为144.93t/(km2·a),为退耕 前的2.4%。这表明在新的侵蚀环境背景下该小流域的侵蚀强度已稳定在轻度以下。</p
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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 30/04/2019