| 丽江盆地地表-地下水的水化学特征及其控制因素 |
| 摘要点击 3512 全文点击 1389 修订日期：2011-05-22 |
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| 中文关键词 玉龙雪山 丽江盆地 水化学 河水 地下水 |
| 英文关键词 Mt. Yulong Lijiang Basin geochemistry characteristics river water groundwater |
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| 中文摘要 |
| 2008年11月~2009年10月在丽江盆地-玉龙雪山地区采集白水河、三束河、哥吉河、束河河水及流域内地下水样品,使用离子色谱法分析了样品主要阴阳离子含量,研究了岩溶地区地表及地下水体的水化学特征、季节变化及其控制因素.结果表明,研究区水体均呈现弱碱性,主要离子组成以Ca2+和HCO3-为主,分别占阳离子和阴离子总量的54.8%和92.4%; 不同季节河水的离子浓度差别较大,季风期离子浓度仅为西风期离子浓度的80%左右,表明季风期丰沛的大气降水输入对河水离子特征有较为显著的影响; 河水离子浓度普遍低于盆地地下水主要阴阳离子浓度; 河水和地下水的无机离子浓度都呈现出从高海拔到低海拔离子含量递增的规律.碳酸盐的风化溶解作用是水体离子的主要来源,季风期降水对水体的离子特征也有一定的影响,人类活动对人类聚居区部分天然水体已造成轻度污染. |
| 英文摘要 |
| The study focused on the chemical element compositions of river water and groundwater in Lijiang Basin. Water samples were collected in Baishui, Sanshu, Geji and Shuhe rivers in Lijiang Basin to analyze pH, conductivity and ion concentration, in order to understand the contributions of anthropogenic activities and rock weathering to river solutes. The results show that all water samples are mildly alkaline and are rich in Ca2+and HCO3-, which account for 54.8 and 92.4 percentage of total ion concentration respectively. Obvious variations have been perceived during monsoon and westward wind season. The ion concentration of river water is lower than that of groundwater. With decreasing elevation, the ion concentrations are found to increase considerably in the study region. According to source study of major ions, water chemistry is mainly influenced by precipitation rock weathering and dissolving processes. In addition, precipitation is an important factor in monsoon seasons whereas the anthropogenic inputs have lead to light pollution on water in residential district. |
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