期刊文献+

皖西大别山区土壤侵蚀空间分布特征及与地形的关系 被引量:11

Spatial Characteristicsof Soil Erosion and Its Relationship to Topography in Dabie Mountains of West Anhui
下载PDF
导出
摘要 基于修正的通用土壤流失方程和GIS空间分析方法,定量分析了皖西大别山区土壤侵蚀空间分布特征,讨论了侵蚀强度与海拔、坡度、坡向等因子的关系.基于信息熵模型评价地形因子与土壤侵蚀强度的空间相关性结果表明:(1)皖西大别山区2010年土壤侵蚀总量为1844.30×10~4t,平均侵蚀模数为1415.05t/km^2·a.区域以微度和轻度侵蚀为主,分别占总面积的52.95%和31.99%,侵蚀强度由东南至西北逐渐加剧.(2)坡度和海拔主导着区域内土壤侵蚀强度的空间分布.随着坡度和海拔增加,侵蚀强度不断加剧,强度侵蚀的面积比例增加,微度侵蚀的面积减少;在坡度15-25°区域、海拔200-500m区域的土壤侵蚀总量最大.坡向对土壤侵蚀强度的影响较小,土壤侵蚀强度在东南坡向较其它坡向略强.(3)地形因子与土壤侵蚀强度的空间相关性强弱为:坡度>海拔>坡向.坡度是安徽省大别山区土壤侵蚀强度的主导因子. Based on revised universal soil loss equation (RUSLE ) and GIS spatial analysis technique, this research analyzed the spatial dis tribution o f soil erosion in Dabie Mountains of West Anhui, and explored the relationships between elevation, slope, and aspect and soil erosion in tensity. The spatial correlation betweentopographic factors and erosion intensity were analyzed by using information entropy model. (1) The annual amount of soil erosion was 1844.30 X l 〇4t , and mean soil erosive modulus was 1415.05t /km2 ? a in 2010. Spatially, soil erosion strengthened from southeast to n o r thw e s t. T r iv ia la n d l ig h t soil erosion areas dominated soil erosion intensity,and accounting fo r 52.95% and 31.99% of total areas. (2) Elevation and slope dominated the spatial distribution of soil erosion intensity in Dabie Mountains o f West A n h u i. Soil erosion degree strengthened wi th elevation and slope increased. The area o f trivia l erosion decreased, and area of intensive erosion increased, along wi th elevation and slope increased. Soil erosion was the strongest from 200m to 500m in different elevation zones. In different slope zones, soil erosion in the 15 - 25° zone was the strongest. Soil erosion of southeast aspect was s l ight ly stronger than other aspects. (3) The spatial correlation was ordered as follows: slope〉 elevation〉 aspect. Slope was the dominant factor of soil erosion intensity in the Dabie Mountains of West Anhui.
出处 《安徽师范大学学报(自然科学版)》 CAS 2017年第3期265-270,共6页 Journal of Anhui Normal University(Natural Science)
基金 国家自然科学基金项目(41501226) 安徽省高校自然科学研究项目(KJ2015A034) 土壤与农业可持续发展国家重点实验室开放基金(Y412201431) 安徽理工大学博士基金(ZY020)
关键词 土壤侵蚀 地形因子 皖西大别山 soil erosion topographical factor Dabie Mountains of West Anhui
  • 相关文献

参考文献12

二级参考文献138

共引文献338

同被引文献229

引证文献11

二级引证文献205

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部