Florida Bay Water Quality Estimated by Underway Flow-through Measurement

Data was collected using a boat-mounted Dataflow onboard flow-through collection system (Madden and Day 1992). While the boat is underway, the Dataflow receives a continuous stream of water from an onboard pump that is routed to a series of sensors operating in flow-through mode. These sensors measure the physical and optical properties of water passing through the system at 6 second intervals (approximately every 70 m of boat travel). Measurements are georeferenced by an onboard GPS unit with a horizontal accuracy of ± 250 cm. Each Dataflow survey is supplemented by a set of discrete grab samples. These samples were collected from the Dataflow outflow hose while underway and were analyzed for chlorophyll concentration, total suspended solids, as well as a suite of organic and inorganic nutrient species. Dataflow surveys took place on a quarterly to bimonthly interval from 2008 to 2015.

本数据集采用船载Dataflow流通采集系统（Madden与Day，1992）完成数据采集。船舶航行过程中，Dataflow通过船载泵获取连续水流，该水流经管路输送至一系列以流通模式运行的传感器。这些传感器以6秒为间隔（对应船舶约每航行70米），对流经系统的水体的物理与光学属性进行测量。所有测量数据均通过船载GPS设备进行地理配准，其水平定位精度为±250厘米。每次Dataflow航次均配套采集一组离散抓取水样。上述样本于船舶航行期间从Dataflow的出水软管采集，随后对其叶绿素浓度、总悬浮固体含量以及一系列有机与无机营养盐类开展分析。Dataflow航次的开展频率为每季度至每两个月一次，采集时段为2008年至2015年。