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Temporal variability in water quality parameters—a case study of drinking water reservoir in Florida, USA

机译：水质参数的时间变异性-以美国佛罗里达州的饮用水水库为例

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摘要

Our objective was to evaluate changes in water quality parameters during 1983-2007 in a subtropical drinking water reservoir (area: 7 km~2) located in Lake Manatee Watershed (area: 338 km~2) in Florida, USA. Most water quality parameters (color, turbidity, Secchi depth, pH, EC, dissolved oxygen, total alkalinity, cations, anions, and lead) were below the Florida potable water standards. Concentrations of copper exceeded the potable water standard of <30 μgT~-1 in about half of the samples. About 75 % of total N in lake was organic N (0.93 mgF1) with the remainder (25 %) as inorganic N (NH_3-N: 0.19, NO_3-N: 0.17 mgF~-1), while 86 % of total P was orthophos-phate. Mean total N/P was <6:1 indicating N limitation in the lake. Mean monthly concentration of chlorophyll-a was much lower than the EPA water quality threshold of 20 μgl~-1. Concentrations of total N showed significant increase from 1983 to 1994 and a decrease from 1997 to 2007. Total P showed significant increase during 1983-2007. Mean concentrations of total N (n=215; 1.24 mgF~-1) were lower, and total P (n=286; 0.26 mgF~-1) was much higher than the EPA numeric criteria of 1.27 mg total N 1 ~-1 and 0.05 mg total P F1 for Florida's colored lakes, respectively. Seasonal trends were observed for many water quality parameters where concentrations were typically elevated during wet months (June—September). Results suggest that reducing transport of organic N may be one potential option to protect water quality in this drinking water reservoir.
机译：我们的目的是评估位于美国佛罗里达州海牛湖分水岭（面积：338 km〜2）的亚热带饮用水水库（面积：7 km〜2）在1983-2007年期间水质参数的变化。大多数水质参数（颜色，浊度，Secchi深度，pH，EC，溶解氧，总碱度，阳离子，阴离子和铅）均低于佛罗里达州饮用水标准。在大约一半的样品中，铜的浓度超过了<30μgT〜-1的饮用水标准。湖泊中总氮的约75％为有机氮（0.93 mgF1），其余（25％）为无机氮（NH_3-N：0.19，NO_3-N：0.17 mgF〜-1），而总P的86％为正磷酸盐。平均总N / P小于6：1，表明湖泊中的氮含量受到限制。叶绿素-a的平均每月浓度远低于EPA水质阈值20μgl〜-1。从1983年至1994年，总氮的浓度显示出显着增加，从1997年至2007年，其浓度下降。在1983-2007年期间，总磷显示出显着增加。总氮的平均浓度（n = 215; 1.24 mgF〜-1）较低，而总磷（n = 286; 0.26 mgF〜-1）远高于EPA数值标准1.27 mg总N 1〜-1佛罗里达有色湖泊的总P F1和0.05 mg。在许多水质参数中都观察到季节性趋势，在潮湿月份（6月至9月），浓度通常会升高。结果表明，减少有机氮的运输可能是保护该饮用水水库水质的一种潜在选择。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第5期|4305-4320|共16页
  • 作者

    Gurpal S. Toor; Lu Han; Craig D. Stanley;

  • 作者单位

    Soil and Water Quality Laboratory, Gulf Coast Research and Education Center, University of Florida,14625 C.R. 672,Wimauma, FL 33598, USA;

    Soil and Water Quality Laboratory, Gulf Coast Research and Education Center, University of Florida,14625 C.R. 672,Wimauma, FL 33598, USA;

    Soil and Water Quality Laboratory, Gulf Coast Research and Education Center, University of Florida,14625 C.R. 672,Wimauma, FL 33598, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lake management; nitrogen; phosphorus; temporal variability; water quality;

    机译：湖泊管理;氮;磷;时间变异;水质;

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