共和盆地土地荒漠化敏感性评估  

Desertification sensitivity assessment in the Gonghe Basin

作　　者：贾虹 刘连友 刘吉夫 Jia Hong;Liu Lianyou;Liu Jifu(Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education/MOE Engineering Research Center of Desertification and Blown-Sand Control/Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学环境演变与自然灾害教育部重点实验室/防沙治沙教育部工程研究中心/地理科学学部,北京100875

出　　处：《中国沙漠》2025年第1期1-9,共9页Journal of Desert Research

基　　金：国家自然科学基金项目(42330502,42201168);第二次青藏高原综合科学考察研究项目(2019QZKK0906)。

摘　　要：共和盆地位于青藏高原气候变化的敏感区域,由于极端的气候条件和不合理的人类活动,正面临严重的荒漠化威胁。基于气候质量指数(CQI)、植被质量指数(VQI)、土壤质量指数(SQI)和管理质量指数(MQI),利用MEDALUS模型,评估共和盆地2000-2020年荒漠化敏感性的时空分布特征,并利用地理探测器模型探究荒漠化敏感性的驱动机制。结果表明:(1)共和盆地土地荒漠化以中高敏感性为主,呈现出中部高、四周低的空间格局。(2)2000-2020年共和盆地荒漠化敏感性显著降低,高、极高荒漠化敏感性的土地面积明显减少。(3)气候质量指数、植被质量指数对荒漠化敏感性的影响高于土壤质量指数和管理质量指数;共和盆地的荒漠化敏感性受自然与人为因素共同影响,植被质量指数与管理质量指数相互作用是荒漠化敏感性的主导因素。The Gonghe Basin is located in a sensitive area of climate change on the Qinghai-Tibet Plateau,and is facing serious desertification threats due to extreme climate conditions and irrational human activities.In this study,we used MEDALUS model to evaluate the spatiotemporal variation characteristics of desertification sensitivity from 2000 to 2020 based on the climate quality index(CQI),vegetation quality index(VQI),soil quality index(SQI)and management quality index(MQI),and then analyzed the driving mechanism of desertification sensitivity using Geodetector.The results showed:(1)The land desertification in the study area was mainly characterized by medium to high sensitivity,showing a spatial pattern of high sensitivity in the central region and low sensitivity in the surrounding areas.(2)From 2000 to 2020,the desertification sensitivity of the Gonghe Ba‐sin significantly decreased,and the land area with high and extremely high desertification sensitivity had markedly declined.(3)The influence of climate quality index and vegetation quality index on desertification sensitivity was higher than that of soil quality index and management quality index;the desertification sensitivity of Gonghe Basin was affected by both natural and human factors,and the interaction between vegetation quality index and management quality index was the dominant factor of desertification sensitivity.

关 键 词：荒漠化 MEDALUS 敏感性评估 地理探测器 共和盆地 

分 类 号：P931.3[天文地球—自然地理学]