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不同盖度羊草地对水土流失的影响
Authors
刘公社
李龙
+3 more
肖庆红
郝明德
郭胜安
Publication date
1 January 2016
Publisher
Doi
Cite
Abstract
[目的]研究羊草盖度与产流产沙量和风蚀量关系,为羊草种植区水土流失防治提供依据。[方法]通过人工模拟降雨试验和风洞模拟试验,研究5种盖度下羊草地的产沙产流特性和抗风蚀特性,对不同盖度羊草地的水土保持效应进行探讨。[结果]坡度相同时,随羊草盖度的增加产流时间逐渐延后;随着盖度的增加,累积径流量的减少率小于累积产沙量的减少率。当羊草盖度由20%增加到100%时,风蚀量减少96.78%;当羊草盖度从60%增加到80%时,风蚀量的减少率明显大于其他相邻盖度风蚀量的减少率。0~23cm高度内收集到的风蚀物占整体风蚀量的70%以上。[结论]羊草地的产流和产沙特征与盖度有密切关系,随着羊草盖度的逐渐增加,产流量和产沙量逐渐减小;羊草地的风蚀速率与盖度呈负相关关系,与风速呈正相关关系
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of Botany,Chinese Academy Of Sciences
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Last time updated on 27/10/2022