摘要
研究地形因子对水土流失造成的影响,可为区域水土保持工作提供参考。本文以广西百色市、河池市、贺州市、防城港市为研究区域,以ArcGIS平台为技术支持,基于数字高程模型数据,选取坡度、剖面曲率、地表粗糙度、沟壑密度4个指标,进行空间叠加分析,得到研究区基于所选地形因子的水土流失强度分级图及水土流失面积,得出如下结论:1)基于地形因子的水土流失分析结果与实际水土流失分区具有较大的吻合性,表明所选地形因子是导致研究区水土流失的重要因素;2)仅考虑文中所选地形因子对水土流失的影响,四市的水土流失强度由高到低依次为河池市、百色市、贺州市、防城港市;3)不同地貌形态下地形因子对水土流失的影响程度不同,根据本文研究结果,山地地区及喀斯特地貌形态地区受地形因子的影响更大。
Studying the effects of topographical factors on soil and water loss can provide a reference for regional soil and water conservation.Taking Baise,Hechi,Hezhou,Fangchenggang in Guangxi as research areas,and using ArcGIS platform as the technical support,based on the digital elevation model data,the four indicators such as slope,profile curvature,surface roughness and trench density were selected for spatial overlay analysis.Based on the analysis,the soil and water loss intensity grading map and the area of soil and water loss based on the selected terrain factors in the study area are obtained,and the following conclusions are drawn:(1)The results of soil and water loss analysis based on terrain factors are in good agreement with the actual soil and water loss zoning,indicating that the selected terrain factors are important factors leading to soil and water loss in the study area.(2)Considering only the influence of selected terrain factors on soil and water loss,the intensity of soil and water loss in the four cities in order from high to low is:Hechi,Baise,Hezhou,Fangchenggang.(3)Terrain factors have different effects on soil and water loss under different landforms.According to the results of this paper,mountainous areas and karst landforms are more affected by terrain factors.
作者
欧镇丽
刘彦花
廖丹婵
杨宇宁
OU Zhenli;LIU Yanhua;LIAO Danchan;YANG Yuning(School of Natural Resources and Surveying,Nanning Normal University,Nanning 530001,China;Key Laboratory of Environment Change and Resources Use in Beibu Gulf under Ministry of Education/Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning Normal University,Nanning 530001,China;College of Economics and Management,Nanning Normal University,Nanning 530001,China)
出处
《测绘与空间地理信息》
2021年第2期58-63,共6页
Geomatics & Spatial Information Technology
基金
广西第七批特聘专家专项——国家自然科学基金项目“基于图谱分析的区域经济发展与资源环境脱钩路径研究——以广西北部湾经济区为例”(41461116)
北部湾环境演变与资源利用教育部重点实验室和广西地表过程与智能模拟重点实验室开放基金项目(GTEU-KLOP-K1701)资助。
