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首页> 外文期刊>International Journal of Environmental Research and Public Health >Environmental Factors Correlated with Culturable Enterococci Concentrations in Tropical Recreational Waters: A Case Study in Escambron Beach, San Juan, Puerto Rico
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Environmental Factors Correlated with Culturable Enterococci Concentrations in Tropical Recreational Waters: A Case Study in Escambron Beach, San Juan, Puerto Rico

机译：与热带休闲水域可培养肠球菌浓度相关的环境因素：以波多黎各圣胡安Escambron海滩为例

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摘要

Enterococci concentration variability at Escambron Beach, San Juan, Puerto Rico, was examined in the context of environmental conditions observed during 2005?￠????2015. Satellite-derived sea surface temperature (SST), turbidity, direct normal irradiance, and dew point were combined with local precipitation, winds, and mean sea level (MSL) observations in a stepwise multiple regression analyses (Akaike Information Criteria model selection). Precipitation, MSL, irradiance, SST, and turbidity explained 20% of the variation in observed enterococci concentrations based upon these analyses. Changes in these parameters preceded increases in enterococci concentrations by 24 h up to 11 days, particularly during positive anomalies of turbidity, SST, and 480?￠????960 mm of accumulated (4 days) precipitation, which relates to bacterial ecology. Weaker, yet still significant, increases in enterococci concentrations were also observed during positive dew point anomalies. Enterococci concentrations decreased with elevated irradiance and MSL anomalies. Unsafe enterococci concentrations per US EPA recreational water quality guidelines occurred when 4-day cumulative precipitation ranged 481?￠????960 mm; irradiance < 667 W???·m ?￠????2 ; daily average turbidity anomaly >0.005 sr ?￠????1 ; SST anomaly >0.8 ???°C; and 3-day average MSL anomaly
机译：在2005年至2015年期间观察到的环境条件下，对波多黎各圣胡安Escambron海滩的肠球菌浓度变化进行了检查。通过逐步多元回归分析（Akaike Information Criteria模型选择），将卫星衍生的海表温度（SST），浊度，直接法向辐照度和露点与局部降水，风和平均海平面（MSL）观测值相结合。根据这些分析，降水，MSL，辐照度，SST和浊度解释了所观察到的肠球菌浓度的20％变化。这些参数的变化先于肠球菌浓度增加24小时，直至11天，尤其是在浊度，SST和480 mm×960 mm累积（4天）降水的正异常期间，这与细菌生态有关。在阳性露点异常期间还观察到肠球菌浓度增加，但仍然较弱。肠球菌浓度随辐照度和MSL异常升高而降低。当4天累积降水量在481 mm至960 mm范围内时，根据US EPA娱乐用水质量准则发生了不安全的肠球菌浓度。辐照度<667 W ???·m？￠ ?????? 2;日平均浊度异常> 0.005 sr？1？ SST异常> 0.8°C;和3天平均MSL异常<18.8 cm。该案例研究表明，卫星衍生的环境数据可用于为未来的水质研究提供信息，并保护人类健康。

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