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首页> 外文期刊>Environmental earth sciences >Lake water quality assessment: a case study of Shahu Lake in the semiarid loess area of northwest China
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Lake water quality assessment: a case study of Shahu Lake in the semiarid loess area of northwest China

机译：湖泊水质评价：以中国西北半干旱黄土区的沙湖为例

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摘要

A comprehensive assessment on lake water quality was carried out in Shahu Lake, northwest China, to provide valuable information about present lake water quality for decision making. Major ions, general parameters, bacteriological parameters, organics and trace metals monitored monthly in 2014 were considered. Monitored parameters were compared with quality criteria for surface water of China, and overall water quality assessment was carried out using an entropy weighted water quality index (EWQI) based on 20 selected parameters. Lake water quality was also assessed for irrigation purpose. The results show that the lake water is of Cl center dot SO4-Na facies with high salinity and COD. The geochemistry of the lake water is regulated by intense evaporation and human activities. TP, TN and F- are major inorganic contaminants, with over 50% of the water samples polluted by them. Oil, mainly attributed by leaky motor tourist boats, is the major organic pollutants in the lake water, with 10 samples (37.04%) showing higher oil content than the permissible limit. The concentrations of other inorganic and organic contaminants as well as trace metals are well below the permissible limits. The present study indicates that inorganic contamination in the lake water is more severe than organic pollution. The overall lake water quality, assessed by EWQI, is poor and very poor with SO42-, TDS, TH and Cl-being the dominant contributing factors. The lake water is suitable for irrigation in terms of alkalinity, but is unsuitable for irrigation from the salinity point of view. Accelerating the circulation and replenishment of the lake water is an important way of reducing contaminant concentrations. This study is important in providing comprehensive information on lake water quality for decision makers and valuable reference for international lake water researchers.
机译：在中国西北的沙湖对湖泊水质进行了综合评估，以提供有关当前湖泊水质的宝贵信息，以供决策。考虑了2014年每月监测的主要离子，一般参数，细菌学参数，有机物和微量金属。将监测的参数与中国地表水水质标准进行比较，并基于20个选定参数，使用熵加权水质指数（EWQI）进行整体水质评估。还评估了湖泊水质以用于灌溉目的。结果表明，湖水为Cl中心点SO4-Na相，盐度和COD高。剧烈蒸发和人类活动调节着湖水的地球化学。 TP，TN和F-是主要的无机污染物，超过50％的水样被它们污染。湖水中的主要有机污染物是主要由泄漏的游船引起的油，其中10个样品（37.04％）的油含量高于允许的限度。其他无机和有机污染物以及痕量金属的浓度均远低于允许的限值。本研究表明，湖水中的无机污染比有机污染更为严重。由EWQI评估的总体湖泊水质很差，而且非常差，其中SO42，TDS，TH和Cl是主要的影响因素。就碱度而言，湖水适合灌溉，但从盐度的角度来看，不适合灌溉。加快湖水的循环和补充是减少污染物浓度的重要方法。这项研究对于为决策者提供有关湖泊水质量的全面信息以及为国际湖泊水研究人员提供有价值的参考非常重要。

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  • 来源
    《Environmental earth sciences》 |2017年第5期|232.1-232.15|共15页
  • 作者

    Wu Jianhua; Xue Chenyang; Tian Rui; Wang Siting;

  • 作者单位

    Changan Univ, Sch Environm Sci & Engn, 126 Yanta Rd, Xian 710054, Peoples R China|Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, 126 Yanta Rd, Xian 710054, Peoples R China;

    Changan Univ, Sch Environm Sci & Engn, 126 Yanta Rd, Xian 710054, Peoples R China|Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, 126 Yanta Rd, Xian 710054, Peoples R China;

    Changan Univ, Sch Environm Sci & Engn, 126 Yanta Rd, Xian 710054, Peoples R China|Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, 126 Yanta Rd, Xian 710054, Peoples R China;

    Changan Univ, Sch Environm Sci & Engn, 126 Yanta Rd, Xian 710054, Peoples R China|Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, 126 Yanta Rd, Xian 710054, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Lake water; Water pollution; Water quality index; Entropy weight; Seasonal variation; Loess area;

    机译：湖泊水水污染水质指数熵权季节变化黄土区;

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