1986~2019年乌拉特后旗荒漠化动态演变及其成因研究  

Analysis on the Dynamic Evolution and Causes of Desertification in the Later Period of Urat From 1986 to 2019

作　　者：苏丽德 王海兵 左合君 Su Lide;Wang Haibing;Zuo Hejun(Key Laboratory of Aeolian Sand Physics and Sand Control Engineering from Inner Mongolia Autonomous Region,College of Desert Control,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,内蒙古风沙物理与防沙治沙工程重点实验室,内蒙古呼和浩特010018

出　　处：《绿色科技》2020年第12期1-6,共6页Journal of Green Science and Technology

基　　金：内蒙古自治区科技重大专项(编号:2019ZD007)。

摘　　要：指出了巴音温都尔沙漠位于乌拉特后旗境内,为内蒙古五大沙漠,对区域荒漠化发展和分布影响显著。利用Landsat数据建立了NDVI-Albedo特征空间,计算出荒漠化差值指数,对乌拉特后旗1986~2019年土地荒漠化动态变化进行了动态监测并分析其成因。结果表明:荒漠化土地集中分布在巴音温都尔沙漠及其周边地区,其中极重度荒漠化主要分布在本巴台沙漠和海里沙漠,重度荒漠化分布在巴音查干沙漠,中度荒漠化分布在巴音温都尔沙漠及其周边地区,轻度荒漠化则分布于狼山及其周边地区。2019年乌拉特后旗荒漠化土地总面积为23415.45 km^2,其中极重度荒漠化面积为5437.55 km^2;重度荒漠化面积为4285.39 km^2;中度荒漠化面积为9493.49 km^2;轻度荒漠化为4297.02 km^2。33年间乌拉特后旗荒漠化面积由23390.8 km^2增至23415.45 km^2,以中度荒漠化土地为主。1986~2015近33年间荒漠化土地扩展率仅为0.8%,但是在缓慢发展的同时,区域荒漠化情况却进一步加重,在1986~2000年间,荒漠化发生变化的主要因子为自然因素,2000~2019年间荒漠化变化则以人为因素主导。The BayinWendul Desert is located in Wulathou Banner,which is the five major deserts in Inner Mongolia,and has a significant impact on the development and distribution of regional desertification.This paper uses Landsat data to establish the NDVI-Albedo feature space,calculate the desertification difference index,dynamically monitor the dynamic changes of land desertification in Wulatehouqi from 1986 to 2019 and analyze the causes.The results show that:Desertification land is concentrated in BayinWendul Desert and its surrounding areas.Among them,extremely severe desertification is mainly distributed in Benbatai Desert and Haili Desert,and severe desertification is distributed in Bayanchagan Desert,and moderate desertification is distributed in BayinWendul Desert and its surrounding areas,while mild desertification is distributed in Langshan and its surrounding areas.The total area of desertified land in Wulathou Banner in 2019 is 23415.45 km^2,of which the extremely severe desertification area is 5435.55 km^2;the severe desertification area is 4285.39 km^2;the moderate desertification area is 9493.49 km^2;the mild desertification area is 4297.02 km^2.The desertification area of Wulathouqi ranges from^23390.8 km^2 to 23415.45 km^2,mainly with moderate desertification land in the past 33 years.In the past 33 years from 1986 to 2015,the land expansion rate of desertification is only 0.8%,but at the same time of slow development,the regional desertification situation is further aggravated.From 1986 to 2000,the main factors for desertification changes are natural factors.While the changes in desertification in 2019 is dominated by human factors.

关 键 词：巴音温都尔沙漠 荒漠化差值指数 动态变化 植被覆盖度 

分 类 号：X171[环境科学与工程—环境科学]