基于多源数据的内蒙古东部地区防风固沙能力变化研究

Research on Change of Windbreak and Sand-fixing Capability in Eastern Inner Mongolia Based on Multi-source Data

土壤风蚀是内蒙古的严重环境问题之一,所以,开展防风固沙研究对当地具有重要的参考意义。本文以内蒙古自治区东部为研究对象,基于GIS技术,分析内蒙古东部地区2000年和2015年防风固沙功能的变化。以气象因子、土壤可蚀性因子、土壤结皮因子、植被覆盖因子和地表粗糙因子作为防风固沙功能的重要性评价指标,采用修正风蚀方程估算潜在和实际风蚀强度,以两者差值作为生态系统固沙量来评价生态系统防风固沙功能的强弱。

Soil erosion is one of the serious environmental problems in Inner Mongolia,so the research on wind and sand fixation of the soil has important reference significance to the local area.Taking Eastern the Inner Mongolia Autonomous Region as the research object and based on GIS technology,this paper analyses the changes in wind and sand fixing function of Eastern Inner Mongolia in 2000 and 2015.With meteorological factors,soil erodibility factor,soil crust factor,the importance of evaluation index of vegetation coverage factor and surface roughness factor as a windbreak,the modified wind erosion equation to estimate the potential and actual wind erosion intensity,with the difference between the two as the ecosystem fixing capacity to evaluate windbreak ecosystem strength.