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首页> 外文期刊>Environmental Science & Technology >Simple Estimate of Entrainment Rate of Pollutants from a Coastal Discharge into the Surf Zone
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Simple Estimate of Entrainment Rate of Pollutants from a Coastal Discharge into the Surf Zone

机译：从沿海排入冲浪区的污染物的夹带率的简单估算

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摘要

Microbial pollutants from coastal discharges can increase illness risks for swimmers and cause beach advisories. There is presently no predictive model for estimating the entrainment of pollution from coastal discharges into the surf zone. We present a novel, quantitative framework for estimating surf zone entrainment of pollution at a wave-dominant open beach. Using physical arguments, we identify a dimensionless parameter equal to the quotient of the surf zone width l_(sz) and the cross-flow length scale of the discharge l_α - M_j~(1/2)/U_(sz(3)) where M_j is the discharge's momentum flux and U_(sz) is a representative alongshore velocity in the surf zone. We conducted numerical modeling of a nonbuoyant discharge at an alongshore uniform beach with constant slope using a wave-resolving hydrodynamic model. Using results from 144 numerical experiments we develop an empirical relationship between the surf zone entrainment rate a and l_(sz)/l_α.The empirical relationship can reasonably explain seven measurements of surf zone entrainment at three diverse coastal discharges. This predictive relationship can be a useful tool in coastal water quality management and can be used to develop predictive beach water quality models.
机译：沿海排放物中的微生物污染物会增加游泳者的疾病风险，并引起海滩咨询。目前，尚无用于估算从沿海排放物进入冲浪区的污染夹带的预测模型。我们提出了一种新颖的定量框架，用于估计在波浪为主的开放海滩上的冲浪带污染。使用物理参数，我们确定了一个无量纲参数，该参数等于冲浪区宽度l_（sz）的商与排放口l_α的横流长度的商-M_j〜（1/2）/ U_（sz（3）） M_j是流量的动量通量，U_（sz）是冲浪区中代表性的沿岸速度。我们使用波动解析水动力模型对具有恒定斜率的沿海均匀海滩的非浮力排放进行了数值模拟。利用144个数值实验的结果，我们得出了冲浪带夹带率a和l_（sz）/l_α之间的经验关系，该关系可以合理地解释三个不同沿海排放区的七个冲浪带夹带量。这种预测关系可以成为沿海水质管理中的有用工具，并可用于开发预测性海滩水质模型。

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  • 来源
    《Environmental Science & Technology》 |2013年第20期|11554-11561|共8页
  • 作者

    Simon H. C. Wong; Stephen G. Monismith; Alexandria B. Boehm;

  • 作者单位

    Department of Civil and Environmental Engineering, Environmental and Water Studies, Stanford University, Stanford, Californi 94305, United States;

    Department of Civil and Environmental Engineering, Environmental and Water Studies, Stanford University, Stanford, Californi 94305, United States;

    Department of Civil and Environmental Engineering, Environmental and Water Studies, Stanford University, Stanford, Californi 94305, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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