Evaluation index of water environmental carrying capacity in Shaanxi is determined, depending on characteristics of the water environment in Shaanxi Province and selection principles of water environment carrying capacity evaluation index. Vector norm method is used to determined normalized value of each index of the various types of evaluation factors,based on analysis of the vector-mode method characteristics. The study results show that water environmental carrying capacity in Shaanxi Province improved gradually from 2005 to 2009 and the valuation value rose from 0.281 to 0.352.%根据陕西省水环境特征和水环境承载力评价指标的选取原则确定了陕西省水环境承载力评价指标.在分析向量模法特征的基础上,应用向量模法确立了各类评价因素的每个因子的归一化值.得出陕西省水环境承载力状态结果,结果表明2005-2009年间陕西省水环境承载力状况呈逐年改善的趋势,水环境承载力评价值由0.281升至0.352.
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