This metadata record describes water quality data collected during a water-quality mapping project. Project data are an aggregation of data collected during forty 2018 DATAFLOW mapping cruises.
The data are contained in six related entities (tables): Light_Attenuation_Data, Monitoring_Event_Data, Optical_Density_Data, Sonde_Data, Station_Information and Water_Quality_Data. Each table contains attributes (fields).
The entity Light_Attenuation_Data is comprised of the attributes: Agency, BiasPC, Cruise, Depth, Details, EventId, Lab, Latitude, Layer, Longitude, LowerPycnocline, MeasureValue, Method, Station, Parameter, PrecisionPC, Problem, Program, Project, Qualifier, SampleDate, SampleReplicateType, SampleTime, SampleType, Source, Station, TotalDepth, Unit and UpperPycnocline.
The entity Monitoring_Event_Data is comprised of the attributes: Agency, CloudCover, Cruise, Details, EventId, FieldActivityEventType, FieldActivityRemark, FlowStage, GaugeHeight, Latitude, Longitude, LowerPycnocline, MonitoringStation, PrecipType, Pressure, Program, Project, SampleDate, SampleTime, Source, Station, TideStage, TotalDepth, UpperPycnocline, WaveHeight, WindDirection and WindSpeed.
The entity Optical_Density is comprised of the attributes: Agency, BiasPC, Cruise, Depth, Details, EventId, HUC8, Lab, Latitude, Layer, Longitude, LowerPycnocline, MeasureValue, Method, Parameter, PrecisionPC, Problem, Program, Project, Qualifier, SampleDate, SampleReplicateType, SampleTime, SampleReplicateType, SampleType, Source, Station, Station, TotalDepth, Unit and UpperPycnocline.
The entity Sonde_Data is comprised of the attributes: Sample_Date, Sample_Time, Water_Body, Section, Pri_Seg, Sonde, Latitude, Longitude, Total_Depth, Boat_Speed, Batt, Wtemp, Spcond, Salinity, Do_Sat, Do, Ph, Turb_NTU, Fluor, TChl_Pre_Cal and Comments.
The entity Station_Information is comprised of the attributes: CBSeg2003, CBSeg2003Description, CBSegmentShed2009, CBSegmentShed2009Description, CountyCity, FallLine, FIPS, HUC12, HUC8, Latitude, LLDatum, Longitude, State, Station, StationDescription, USGSGage, UTMX, and UTMY.
The entity Water_Quality_Data is comprised of the attributes: Agency, BiasPC, Cruise, Depth, Details, EventId, Lab, Latitude, Layer, Longitude, LowerPycnocline, MeasureValue, Method, MonitoringStation, Parameter, PrecisionPC, Problem, Program, Project, Qualifier, SampleDate, SampleReplicateType, SampleTime, SampleReplicateType, SampleType, Source, Station, TotalDepth, Unit and UpperPycnocline.
Maps created by interpolating the dissolved oxygen, turbidity, chlorophyll a, salinity and temperature data acquired during monthly mapping cruises show spatial distribution of water quality parameter values on the day of the survey. The maps may be viewed and downloaded from <
http://eyesonthebay.dnr.maryland.gov/sim/DataflowDataMenu.cfm>.