Physical Processes of Land Degradation and Changes of Land Resources Use by Agro-Pastoralists in the Inner Mongolia, China

在内蒙古自治区中部的武川县，2003-2010年的最大沟蚀速率估计为25-115 cm/yr。该地区的沟壑自全新世中期开始持续形成。在内蒙古西部乌兰布和沙漠东缘，近8 ka以来沙丘迁移量达到1500 ~ 2800 m以上，近50年沙丘迁移量达到1~10 m/年。在这样的自然环境下，当地农民在不可持续的意识下集约从事向日葵种植。通过对近年来ndvi值变化的分析，明确了浑山达克沙漠沙漠化过程的组成部分。

In the Wuchuan County, the middle part of the Inner Mongolia Autonomous Region, China, it is clarified that maximum gully erosion rate estimated to 25-115 cm/yr during 2003-2010 due to our observation. The gullies in this area continue to form since the middle Holocene. On the eastern margin of the Ulan Buh desert, Western Inner Mongolia, the amount of sand dune migration attains more than 1, 500～2, 800 m since ca. 8 ka, especially 1～10 m/yr in the past five decades. Under such physical environment, local farmers intensively engaged in sunflower cropping in unsustainable consciousness. We also made clear the part of desertification processes of the Hunshandake Desert, from the analysis of NDVI-value change during the recent years.