摘要
喀斯特地区水土流失研究是水土流失研究中的重点领域,以小流域为基本单元对水土流失变化进行分析能为水土流失治理成效提供评价依据,对下一步水土流失治理工作的宏观决策提供理论依据和基础信息,为研究喀斯特地区水土流失变化及成因做出努力。通过GIS、ENVI技术,结合土地利用类型变化,采用土地利用转移矩阵分析土地利用变化情况,对比分析水土流失现状。总结得出:果木小流域水土流失面积由19.99 km^2降低到18.42 km^2;由期初以中度侵蚀为主降低到期末以轻度侵蚀为主。其变化原因是:1)土地利用变化;2)石漠化治理。
Soil erosion in karst areas has been the focus of the study on soil erosion. In this paper,we analyzed the changes of soil erosion with small watershed as the basic unit, so as to provide evaluation basis for the effectiveness of soil erosion control, and to provide theoretical basis and basic information for the macro decision-making of soil e- rosion control. Adopting GIS and ENVI technology, combined with land use type changes,we analyzed the land use change by land transfer matrix, and summarized the soil erosion status. It is concluded that the soil erosion area in Guomu Small Watershed has reduced from 19.99 km2 to 18.42 km2 ,and from moderate erosion to mild erosion. The reasons for the change were land use change and effective rocky desertification control.
出处
《贵州科学》
2017年第5期78-84,共7页
Guizhou Science
关键词
土地利用
水土流失变化
成因分析
果木小流域
land use, change of soil erosion, reason analysis, Guomu Small Watershed
