Abstract: The vulnerability of water resources in Guiyang City in 2000-2015 was evaluated using Analytic Hierarchy Process (AHP) in GIS platform. An index system in aspects of exposure, sensitivity, and adaptability for the evaluation was established.Research findings suggest that the vulnerability of water resources in Guiyang City differed remarkably in spatial scale, with vulnerability intensifying and also weakening coexisted. From 2000 to 2015, the vulnerability developed from being high in the middle and south and low in surrounding areas towards low in the north while high in the south. In Yunyan district, Nanming district, Baiyun district, Wudang district, Guanshan Lake district and Huaxi district,the vulnerability of water resources has intensified evidently, among which Guanshan Lake district, Huaxi district and Wudang district witnessed the most remarkable changes. In Qingzhen city, Xiuwen county, Xifeng county, and Kaiyang county, the vulnerability of water resources mostly weakened. The results offer reference for the sustainable and healthy development of social economy and the rational utilization of water resources in Guiyang.

Key words: water resources, vulnerability evaluation index system, changing environment, Guiyang City, GIS, analytic hierarchy process