Characteristic Analysis of Temporal and Spatial Variation of Grassland Desertification in Zoige Plateau from 1991 to 2020
Song Yunfan
Guo Bin
Wu Danqin
Wang Kun
Wang Ge
Zhao Xuan
Abstract：As an important pastoral area in northwest Sichuan,the grassland on the Zoige Plateau has been affected by natural conditions and human activities,resulting in serious desertification in recent years.In order to understand the spatial distribution and dynamic variation of grassland desertification in detail,based on the Landsat images,the deep learning combined with visual interpretation methods was used to extract desertification land from 1991 to 2020 in grassland on the Zoige P lateau and analyze their spatiotemporal variation characteristics and influencing factors.The results showed that:(1)The area of grassland desertification was the largest in Zoige County,followed by Maqu County,while desertification area of Hongyuan County,Luqu County and Aba County was quite small.(2)The sandy land area in the study area increased first and then decreased.(3)The spatial variation characteristics of desertification land in the Zoige Plateau were mainly"development"in the north and"reversal"in the south.(4)The desertification of Zoige grassland was affected by both natural and human factors.The desertification area decreased with the increase of temperature and precipitation,and decreased with the decrease of actual livestock carrying capacity.
Keywords：ZoigeLandsatdesertification areatemporal and spatial distribution
Publication Date：2026-05-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 66-73 )