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首页> 外文期刊>Lakes & Reservoirs >Stratification and water quality of an abandoned opencast coal pit lake at Raniganj Coalfield Area, West Bengal, India
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Stratification and water quality of an abandoned opencast coal pit lake at Raniganj Coalfield Area, West Bengal, India

机译：印度西孟加拉邦Raniganj煤田区的一个废弃露天煤矿坑湖的分层和水质

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摘要

Stratification and assessment of the limnological conditions of an abandoned opencast coal pit (OCP), locally called Khadan, which is a potential water reserve located at the Raniganj-Asansol Coalfield Areas of Burdwan, are the main objectives of this study. Water quality changes occurred with increasing depths in the OCP water and suggest a gradual and significant ecological restoration over time, which can create a condition of sustainable pisciculture. The physical and chemical variables of the OCP water changed with changing depths and seasons. The temperature and alkalinity decreased with depth throughout the year. The dissolved oxygen concentration exhibited a mixing characteristic in the summer and winter, but decreased with depth in the monsoon and postmonsoon seasons. The total hardness increased with depth in the monsoon season, being maximum in the winter (196.0mgL−1). The biochemical oxygen demand (BOD) and chemical oxygen demand (COD) increased with depth in the winter. The silicon concentration increased with depths, exhibiting a maximum value of 14.2mgL−1 in the winter and a minimum value of 1.24mgL−1 in the postmonsoon season. The ammonia-nitrogen, nitrate-nitrogen, potassium, chloride and sulphate concentrations only exhibited seasonal variations. The concentration of heavy metals (arsenic, chromium, cadmium, manganese) decreased with increasing depth. The fluoride concentration exhibited high concentrations in each OCP water layer. The results of this study indicated that limnological variables in thermally stratified lakes may be an important measure for better understanding the gradual process of developing an improved ecological conditions in the OCP and which can facilitate the possibility of pisciculture in the near future.
机译：本研究的主要目的是对废弃的露天煤矿（OCP）（当地称为Khadan）的岩性条件进行分层和评估，该露天矿位于Burdwan的Raniganj-Asansol煤田地区，是潜在的储水区。随着OCP水中深度的增加，水质发生了变化，这表明随着时间的推移，生态系统将逐渐而重要地恢复，从而可以创造可持续的养鱼条件。 OCP水的物理和化学变量随深度和季节的变化而变化。全年温度和碱度随深度降低。在夏季和冬季，溶解氧浓度表现出混​​合特征，但在季风和季风后季节随着深度的增加而降低。季风季节总硬度随深度增加而增加，冬季最高（196.0mgL-1）。在冬季，生化需氧量（BOD）和化学需氧量（COD）随深度的增加而增加。硅浓度随深度增加而增加，在冬季呈现最大值14.2mgL-1，在季风后季节呈现最小值1.24mgL-1。氨氮，硝酸盐氮，钾，氯和硫酸盐的浓度仅表现出季节性变化。重金属（砷，铬，镉，锰）的浓度随深度的增加而降低。在每个OCP水层中，氟化物浓度都显示出高浓度。这项研究的结果表明，热分层湖泊中的湖泊学变量可能是更好地了解OCP中改善生态条件的渐进过程的重要措施，并且可以在不久的将来促进鱼类养殖的可能性。

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  • 来源
    《Lakes & Reservoirs》 |2015年第2期|1-16|共16页
  • 作者

    Subinoy Mondal; Aloke K. Mukherjee; Tarakeshwar Senapati; Sandipan Pal; Smaranya Haque; Apurba R. Ghosh;

  • 作者单位

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

    Department of Environmental Science A K P C Mahavidyalaya Bengai Arambagh Hooghly India;

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

    Department of Environmental Science The University of Burdwan Golapbag Burdwan West Bengal India;

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  • 正文语种 eng
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  • 关键词

    heavy metals; opencast coal pit (Khadan); physicochemical variables; pisciculture; stratification;

    机译：重金属;露天煤矿（Khadan）;理化变量;养鱼业;分层;

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