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通过分析近３８年青海省主要河流径流量及其流域降水、气温的变化趋势，着重研究了干旱气候对青海地表水资源的影响。结果表明，内陆河多为高山冰雪融水和雨水混合补给型河流，外流河多为以雨水补给为主的河流；青海地表水资源呈减少趋势，其减少趋势进入９０年代后尤为明显；气温和降水是影响青海地表水资源的主要气候因子，其中气温升高加剧了流域蒸发量的增大和干旱影响，减少了地表径流量；而９０年代以来降水量的减少特别是汛期降水量的减少直接影响到径流量的减少。
By analyzing the runoff of major rivers in Qinghai Province in recent 38 years and the trend of precipitation and temperature in its drainage basin, the paper studies the effects of arid climate on surface water resources in Qinghai. The results show that most inland rivers are alluvial snowmelt and rainwater recharge recharge rivers. Most of the outlying rivers are mainly recharged by rainwater. The surface water resources of Qinghai are decreasing. The decreasing trend is especially evident after the 1990s. The temperature And precipitation are the main climatic factors affecting the surface water resources in Qinghai, of which the increase of the temperature exacerbates the increase of evaporation and the impact of drought, reducing the surface runoff; and the decrease of precipitation since the 1990s, especially the decrease of precipitation in the flood season Affect the reduction of runoff.