Taking Hengyang basin, a typical hillock area in the subtropical region as a case, the reasons and forms of vulnerability in surface water resource were analyzed in this paper. It is found that the major factors influencing the vulnerability of surface water resource include the climate, topography, soil and vegetation, human activities and economic development. In order to quantitatively evaluate the vulnerability, an assessment indicator system, including 9 indicators, was sep up for the first time in the present study. Then, by using mathematical method to calculate the scores of vulnerabil...
