The Assessment Of Land Desertification Vulnerability And Desertification Prevention And Control Planning In Inner Mongolia

Under the influence of arid and windy weather and long-term overgrazing and other human activities,the desertification in Inner Mongolia is serious and the area of desertified land is 4.08×10~5km~2,accounting for more than 30%of the total land area.The ecological environment of the study area is fragile and the task of desertification prevention and control is arduous.In order to maintain the effects of desertification control and prevent the development of desertification,assessment of the desertification vulnerability and desertification prevention and control planning are essential in the region.This paper selected NDVI(Normalized Difference Vegetation Index)and land use type data,analyzed their distribution characteristics and evolution in Inner Mongolia from 2000 to 2015;Based on the VSD(Vulnerability Scoping Diagram)framework,this paper evaluated the desertification vulnerability in Inner Mongolia;Combining desertification vulnerability and the evolution of NDVI and land use,this paper divided the desertification prevention and control according to the degree of desertification vulnerability.The main results achieved in this paper are:1?This paper analyzed the status of desertification and the dynamic change of land use in Inner Mongolia:The vegetation cover conditions in the study area were gradually improved.In the areas with the highest vegetation coverage and the lowest vegetation coverage,the restoration of vegetation,that is the reversal of land desertification was the most obvious;Urban and rural industrial and mining Residents'land was expanding,and grassland,woodland,cultivated land and unused land are transforming each other,especially the increase in forest area was most obvious.2?This paper studied on the desertification vulnerability in Inner Mongolia using the VSD evaluation model:The desertification vulnerability of Inner Mongolia showed a spatial pattern of“lower-northeast and higher-southwest”.The regions with significant increasing trend of desertification vulnerability were concentrated in the middle of the Urad Houqi,Bayan Nur,which were mainly induced by the increasing trend of exposure.The adaptability improvement induced by economic development was the main reason for the reduction of desertification vulnerability in Inner Mongolia since 2000.Vegetation,wind erosion and dry-wet index were the key natural factors of the evolution of desertification vulnerability.3?This paper divided the desertification of Inner Mongolia and proposed,combining the results of desertification vulnerability and desertification analysis:The desertification prevention and control was divided into 5 sub-regions,15 secondary sub-regions;In the northeast and Hetao areas,the results of desertification control should be consolidated;The desertification vulnerability in the western and the degree of desertification are high,and it is necessary to focus on protection.The research can provide support for the national and local governments to understand the distribution and development trend of desertification in Inner Mongolia and desertification prevention and control work,provide decision support for scientific command of agricultural production and ecological environment restoration,and also provide a reference for ecosystem protection in sand ecological zones.