Nutrient Results of Ground and Surface Waters at the Bayside Well Cluster study site

The dataset contains the nutrient results from the collection of both ground and surface water samples at the Bayside Well Cluster study site. Treated sewage is injected into the limestone under the Florida Keys via on-site disposal systems (OSDs). There are 25,000 septic tank systems, approximately 5,000 cesspools, and approximately 1000 class 5 injection wells. Depths of injection wells ranges from 10 to 30 meters. Excessive algal growth, coral diseases and both marine grass and sponge mortality is perceived by the local population, NOAA, and EPA to be caused by sewage nutrients leaking from groundwater on both sides of the Florida Keys. Determining the rate and direction of saline groundwater movement beneath the Key, and the Florida Bay was considered critical to understanding the fate and effects of subsurface waste water disposal n the Florida Keys. The objective of this research was to determine the rate, direction of flow, and contamination levels of saline groundwater in the Florida Keys and Florida Bay. Contamination studies are necessary to determine if nutrient and other contaminant levels are rising and to provide a baseline of data for future decision making.本数据集包含贝赛德井群（Bayside Well Cluster）研究点位采集的地下水与地表水样本的养分检测结果。 经处理的污水通过现场处置系统（on-site disposal systems, OSDs）注入佛罗里达礁岛群下方的石灰岩地层。该区域现存25000套化粪池系统、约5000座渗井以及约1000座五级注入井，注入井深度区间为10至30米。当地民众、美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）与美国环境保护署（Environmental Protection Agency, EPA）均认为，佛罗里达礁岛群两侧地下水中渗漏的污水养分，是引发藻类过度增殖、珊瑚病害以及海草与海绵死亡的诱因。明确佛罗里达礁岛群下方及佛罗里达湾内咸水地下水的运移速率与方向，是理解该区域地下废水处置后果与影响的核心关键。本研究的目标为测定佛罗里达礁岛群与佛罗里达湾内咸水地下水的运移速率、流向及污染水平。开展污染监测研究，既可判定养分及其他污染物浓度是否呈上升趋势，也可为未来决策提供基准数据集。