Abstract: With the global climate change and the interference of human activities, the ecological vulnerability of various regions has become increasingly prominent. In this study, according to the natural conditions and artificial interference on ecological vulnerability in Huri Chagannoor of Inner Mongolia, eight indexes such as topography, vegetation, soil, meteorology and land use etc. were selected. Based on RS and GIS technology, the analytic hierarchy process (AHP), entropy weight method and comprehensive index method were used to construct the ecological vulnerability assessment model, and the ecological vulnerability of this region in 2010 and 2017 was comprehensively and quantitatively analyzed. The results show that: (1) in 2010 and 2017, the integrated ecological vulnerability index was 3.516 6 and 3.235 0, respectively. The overall ecological vulnerability was in the medium and high level, but the ecological status was generally improved; (2) The regions with potential and mild vulnerability were mainly in the lake, river basins and high vegetation coverage areas in the south of the lake, that with moderate vulnerability generally in low vegetation coverage areas and dry lake basins, and that with severe and extreme vulnerability mainly in the bare land in the east, west and north of the study area; (3) The ecological vulnerability level of most areas to the north of the lake was higher than that of the south. However, during the study period, the ecological vulnerability level of the north decreased in a large area, and shifting from extreme vulnerability to moderate and mild vulnerability; (4) Due to the interaction of natural and human factors, the ecological vulnerability of Huri Chagannoor showed strong spatial autocorrelation characteristics.

Key words: ecological vulnerability, RS, GIS, Huri Chagannoor