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中文摘要：
2009年5～10月在玉龙雪山周边典型小流域白水河、三束河、哥吉河采集河水样品,水化学分析结果表明,三条河流河水均呈现弱碱性,主要离子组成表现为富集Ca2＋＋Mg2＋和HCO3-＋SO42-,且以Ca2＋和HCO3-为主,各类离子存在显著季节变化。离子来源分析表明,玉龙雪山周边小流域河水雨季主要受降水和岩石风化影响,大气降水对河水主要常规离子Na＋、K＋、Ca2＋、Mg2＋、SO42-的贡献率为分别为23.44%,9.66%,3.10%,17.81%,10.48%。研究区碳酸盐岩的风化产物是河水离子组成的主要控制因素。
英文摘要：
In order to study the characteristics of hydrochemical composition in rivers,water samples were collected in Baishui,Sanshu and Geji hydrological stations around Yulong Mountain.The results indicated that water of the three rivers is mildly alkaline with rich with Ca2＋ and HCO3-.Obvious variations have been perceived during the rainy season.According to sources study of major ions,water of the three rivers were mainly influenced by precipitation and rock weathering function.The proportions of Na＋,K＋,Ca2＋,Mg2＋ and SO42-from precipitation in water are 23.44%,9.66%,3.10%,17.81%,and 10.48%,respectively.In addition,the ion characteristics of river water were mainly influenced by carbonating weather.The human activities should not be ignored though its influence was little.
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