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小流域土壤水蚀强度生态预测模型及实验模拟——以神木六道沟流域为例
Authors
张丽萍
张登荣
张锐波
杨勤科
Publication date
1 January 2007
Publisher
Abstract
文以黄土高原陕北神木六道沟流域为例,综合考虑土壤侵蚀发生的主要下垫面因素和土地利用类型,在GIS平台上,进行制图综合生成284个不同的生态单元个体,这些单元体可以划分成83类,而较为重要的有16类,分析、计算了各主要生态单元类型的侵蚀模数;再通过全流域各类生态单元侵蚀模数的组合,模拟了全流域在雨强为2 mm/min和1.5 mm/min的场降雨土壤水蚀模数。模拟结果显示,该方法能预测不同雨强的流域土壤水蚀模数,能体现出流域土壤水蚀强度的空间差异,推得六道沟流域土壤水蚀的严重地段集中在坡度为15°~25°的荒草地、坡地和稀疏灌木草地,而并非是整个流域,这为我们有目的地规划水土保持措施提供了依据
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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