| 典型西北山地-绿洲系统不同水体水化学特征及其水力关系分析 |
| 摘要点击 1269 全文点击 476 投稿时间：2022-05-06 修订日期：2022-06-07 |
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| 中文关键词 水化学 稳定同位素 地下水 地表水 时空变化 |
| 英文关键词 hydrochemistry stable isotopes groundwater surface water temporal and spatial change |
| 作者 | 单位 | E-mail | | 王诗语 | 山西师范大学地理科学学院, 太原 030031
山西师范大学黄河中游生态环境研究中心, 太原 030031 | wangshiyuzuibang@sina.com | | 孙从建 | 山西师范大学地理科学学院, 太原 030031
山西师范大学黄河中游生态环境研究中心, 太原 030031 | suncongjian@sina.com | | 陈伟 | 山西师范大学地理科学学院, 太原 030031
山西师范大学黄河中游生态环境研究中心, 太原 030031 | | | 周思捷 | 山西师范大学地理科学学院, 太原 030031
山西师范大学黄河中游生态环境研究中心, 太原 030031 | | | 张鑫 | 山西师范大学地理科学学院, 太原 030031
山西师范大学黄河中游生态环境研究中心, 太原 030031 | |
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| 中文摘要 |
| 开都河流域是西北内陆区典型的山地绿洲系统，其水化学信息对了解区域水文过程和优化水资源配置具有重要意义.基于2020年内不同季节山区、绿洲区多种水体样品的采集及测试，分析了该区域水化学特征及其水力联系.结果表明：①研究区水体整体呈微碱性，pH和TDS值呈现绿洲区高、山区低的分布特征；HCO3-和Ca2+为主要的阴阳离子，区域水化学类型多为HCO3--Ca2+型，绿洲区地下水水化学类型较之山区更复杂；区域水化学特征受岩石风化和人类活动影响较为明显.②河水δ18 O和δD值呈现夏季贫化、春季富集的季节变化特征，而地下水为冬春贫化，秋季富集；降水和冰川水年内变化不显著；河水及地下水的δ18 O和δD值则表现为绿洲区富集、山区贫化的空间分布特征.③研究区地表水和地下水的相互关系密切，且在夏季转化频繁；绿洲区地表水与地下水的转化特征呈显著的时空差异性.研究结果对于我国西北内陆区水资源的优化配置具有重要意义. |
| 英文摘要 |
| Kaidu River basin is a typical mountain oasis ecosystem in the northwest inland. Its hydrochemical environment information is of great significance to understand the regional hydrological process and optimize the allocation of water resources. Based on the collection of samples of various water bodies in mountainous and oasis areas in different seasons in 2020, this study analyzed the water chemical characteristics and hydraulic links in this region. The results showed that:① the water body in the study area was slightly alkaline as a whole, and the pH and TDS values showed the spatial changes of low in the oasis area and high in the mountain area; HCO3- and Ca2+ were the main anions and cations. The regional hydrochemical type was mostly HCO3--Ca2+, and the hydrochemical type of groundwater in the oasis area was more complex than that in the mountainous area. Regional hydrochemical changes were mainly controlled by rock weathering and human disturbance. ② The δ18O and δD values of the river water showed the seasonal changes of dilution in summer and enrichment in spring, whereas groundwater was depleted in winter and spring and enriched in autumn. Precipitation and glacial water did not change significantly within a year. In space, the δ18O and δD values of river water and groundwater showed the law of enrichment in the oasis area and dilution in the mountainous area. ③ The relationship between surface water and groundwater in the study area was close, and the transformation was frequent in summer. The relationship between surface water and groundwater in the oasis area was closer than that in the mountainous area. Groundwater in the oasis area was recharged by groundwater in the previous period, river water, and precipitation, and the recharge rate was usually groundwater in the previous period>river water>precipitation. |
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