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选择内蒙古中部为研究区,以地理信息系统技术与层次分析法为依托,在深入调研风蚀驱动因子的基础上,构建了一个驱动因子相对全面并且实践可行的土壤风蚀危险度模型;基于该模型,综合长时间序列的遥感数据、地面气象台站观测数据,对研究区2000~2008年土壤风蚀危险度的空间分布格局、变化动态及其驱动机制进行了分析。结果表明:在内蒙古中部地区,从东南到西北土壤风蚀危险度呈现逐渐增强的趋势,不同的风蚀危险等级区有着不一样的主导控制因子;在2000~2008年期间,区域土壤风蚀危险程度总体呈现下降趋势;2000年以来风场强度的持续下降及植被NDVI的持续上升是促使区域土壤风蚀危险度下降的控制因子,而气候干燥度在2005年的大幅上升则是当年区域土壤风蚀危险度上升的控制因素。
Based on the analysis of the driving factors of wind erosion, based on GIS technology and AHP, a risk model of wind erosion is established which is relatively comprehensive and practicable. Based on this model, Based on long-time series of remote sensing data and observational data of ground meteorological stations, the spatial distribution pattern, dynamics of change and driving mechanism of soil erosion risk in the study area from 2000 to 2008 were analyzed. The results show that in central Inner Mongolia, the risk of wind erosion from southeast to northwest tends to increase gradually, and different types of wind erosion risk zones have different dominant risk factors. During the period from 2000 to 2008, The decreasing trend of the wind farm intensity and the continuous increase of vegetation NDVI since 2000 are the control factors to reduce the risk of wind erosion in the region. However, the sharp increase of climate dryness in 2005 is that the risk of soil wind erosion in the region increased Controlling factor.