# Site Information
# ---------------------------------- 
# SiteCode: POBR
# SiteName: Pond Branch at Oregon Ridge, MD
# Latitude: 39.48030556
# Longitude: -76.6875
# LatLonDatum: NAD83 
# Elevation_m: 135.95
# ElevationDatum: NAVD88 
# State: Maryland 
# County: Baltimore 
# Comments: USGS stream gaging station 01583570; water quality sensors are located at this site.  https://waterdata.usgs.gov/monitoring-location/01583570
# SiteType: Stream 
#
# SiteCode: BARN
# SiteName: Baisman Run at Broadmoor, MD
# Latitude: 39.4794722
# Longitude:  -76.67802778
# LatLonDatum: NAD83 
# Elevation_m:  100.38
# ElevationDatum: NAVD88 
# State: Maryland 
# County: Baltimore 
# Comments: USGS stream gaging station 01583580; water quality sensors are located at this site. https://waterdata.usgs.gov/monitoring-location/01583580/
# SiteType: Stream 
#
# SiteCode: GFGB
# SiteName: Gwynns Falls Near Delight, MD
# Latitude: 39.44294444
# Longitude: -76.7834167
# LatLonDatum: NAD83 
# Elevation_m: 162.61
# ElevationDatum: NAVD88 
# State: Maryland 
# County: Baltimore 
# Comments: USGS stream gaging station 01589197; water quality sensors are located at this site. https://waterdata.usgs.gov/monitoring-location/01589197   
# SiteType: Stream 
#
# SiteCode: GFVN
# SiteName: Gwynns Falls at Villa Nova, MD
# Latitude: 39.34588889
# Longitude: -76.7331944
# LatLonDatum: NAD83 
# Elevation_m: 109.91
# ElevationDatum: NAVD88 
# State: Maryland 
# County: Baltimore 
# Comments: USGS stream gaging station 01589300; water quality sensors are located at this site. https://waterdata.usgs.gov/monitoring-location/01589300
# SiteType: Stream 
#
# SiteCode: MCWA
# SiteName: Maidens Choice Run at Wilkens Avenue at Baltimore, MD
# Latitude: 39.275472
# Longitude: -76.665806
# LatLonDatum: NAD83 
# Elevation_m: 21.3
# ElevationDatum: NGVD29
# State: Maryland 
# County: Baltimore City
# Comments: USGS legacy stream gaging station 01589351; water quality sensors are located at this site. https://waterdata.usgs.gov/monitoring-location/USGS-01589351/#dataTypeId=daily-00060-0&period=P10Y
# SiteType: Stream 
#
# SiteCode: DR5
# SiteName: Dead Run Near Catonsville, Maryland
# Latitude: 39.295889
# Longitude: -76.744083
# LatLonDatum: NAD83 
# Elevation_m: 124.29
# ElevationDatum: NAVD88 
# State: Maryland 
# County: Baltimore 
# Comments: Co-located with USGS stream gaging station 01589312.
# SiteType: Stream 
#
# Variable and Method Information
# ----------------------------------
# VariableCode: Turbidity_FNU
# VariableName: Turbidity
# ValueType: Field Observation
# DataType: Continuous
# GeneralCategory: Water Quality
# SampleMedium: Surface Water
# VariableUnitsName: formazin nephelometric unit
# VariableUnitsType: Turbidity
# VariableUnitsAbbreviation: FNU
#
# VariableCode: Suspended_sediment_conc
# VariableName: Suspended sediment concentration
# ValueType: Field Observation
# DataType: Sporadic
# GeneralCategory: Water Quality
# SampleMedium: Surface Water
# VariableUnitsName: milligrams per liter
# VariableUnitsType: Concentration
# VariableUnitsAbbreviation: mg/L
#
# Variable Code: Discharge
# VariableName: Discharge
# ValueType: Derived value
# DataType: Continuous
# GeneralCategory: Hydrology
# SampleMedium: Surface Water
# VariableUnitsName: cubic feet per second
# VariableUnitsType: Flow
# VariableUnitsAbbreviation: cfs
#
# NoDataValue: -9999  
# TimeSupport: 0.0  
# TimeSupportUnitsAbbreviation: min  
# TimeSupportUnitsType: Time  
# TimeSupportUnitsName: minute 
# 
# MethodCode: YSI-EXO2
# MethodDescription: A YSI-EXO2s multiparameter sonde is outfitted with temperature/specific conductance, turbidity (FNU), dissolved oxygen, and pH sensors as well as a central wiper. Data are collected at a 5-minute interval and recorded in a CR1000X Campbell Scientific data logger. Data are transmitted to UMBC via a Sierra Wireless RV50X cellular modems. Data are pulled into UMBC from the modems using Campbell Scientific's Loggernet software loaded onto a computer dedicated to this purpose. Field stations are powered by 60W solar panels, two 12V 42-amp-hr batteries, and 6-amp MorningStar solar controllers. The sondes are co-located with USGS stream gaging stations. The sensors are calibrated in the field every 8 weeks using YSI calibration solutions and procedures. 
# MethodLink: https://www.ysi.com/exo2
#
# MethodCode: Suspended_sediment_conc
# MethodDescription: Suspended sediment samples were collected with ISCO samplers and processed in the laboratory at UMBC. Samples were taken to the lab and refrigerated until analysis. To measure the concentration of suspended sediment, the total mass of the suspended sediment was measured using filtration and the volume of the sample was determined using fluid mass and density. It was assumed that the density of each sample was the density of water (1 g/mL) as suspended sediment never accounted for more than 1% of a sample’s weight; the greatest measured value of suspended sediment concentration was 8210 mg/L, and values of that magnitude were uncommon in the data set. Thus by measuring the total mass of the samples in their bottles and using density as well as the difference between that total mass of the samples and the previously recorded mass of the bottles, the volume of the sample was determined. The mass of the suspended sediment was then measured using filtration. Glass fiber filter paper was prepared by washing with three successive 20 mL volumes of ultrapure DI water while being suctioned in a vacuum flask. The washings were discarded and the filters placed (using forceps) into aluminum weighing dishes, which were then dried in an oven at 103-105 ˚C for 60 minutes. After being removed from the oven, the filters took approximately 30 seconds to cool and were then weighed. This drying, cooling, and weighing cycle was repeated until the mass of the filter paper and dish varied from one cycle to the next by no more than 1 mg. The filters and their weighing dishes were then stored in a desiccator until used. The desiccators were prepared by sealing the vacuum valve using a rubber stopper and placing desiccant into thin nylon pouches that were placed below the desiccator plate. Aluminum trays containing their respective filter paper were arranged on the plate and layered on top of one another, spaced using strips of aluminum foil. To find the mass of suspended sediment in a sample, a desiccated filter paper and its corresponding dish were removed from the desiccator and the filter paper placed on the vacuum apparatus using forceps. While suctioning, the sample (or part of the sample) was poured into the vacuum apparatus. Some samples had large enough concentrations of suspended sediment that multiple filters were necessary for one sample to avoid clogging the filters and needlessly long filtration times. The bottle and cap were thoroughly rinsed into the vacuum apparatus using DI water and the sides of the vacuum apparatus were rinsed a final time to ensure no sediment adhered to the walls. After all visible water had drained, suctioning was turned off and the forceps were used to transfer the filter back to its aluminum weighing dish. The dish and filter dried in the oven for 60 minutes at 103-105 ˚C. After being removed from the oven, the filters took approximately 30 seconds to cool and were then weighed, and then the cycle of drying, cooling, and weighing was repeated until the change in the mass of the tray and filter was no more than 1 mg. The total mass of suspended sediment was determined by difference.
#
# MethodCode: Discharge
# MethodDescription: Stage is measured continuously over time using bubbler or radar devices. Discharge is derived from a rating curve developed by USGS for each station relating field observations of stage to discharge over time. Data is indicated as provisional (P)until it is published as final (A).
#
# Processing Level
#-----------------------------------
# QualityControlLevelCode: QC0
# QualityControlLevelDefinition: Quality controlled data.
# QualityControlLevelExplanation: Data have been minimally edited.
# 
# QualityControlLevelCode: QC1
# QualityControlLevelDefinition: Quality controlled data.
# QualityControlLevelExplanation: Data have passed quality control processing.
# 
# QualityControlLevelCode: P
# QualityControlLevelDefinition: Provisional data
# QualityControlLevelExplanation: Data are preliminary and can be changed in the future.
# 
# QualityControlLevelCode: A
# QualityControlLevelDefinition: Final/accepted data
# QualityControlLevelExplanation: Data are final. 
#
# Qualifier Codes
# ----------------------------------
# LI: Linear Interpolation
#
# Source Information 
# ---------------------------------- 
# Organization: University of Maryland, Baltimore County
# SourceCode: UMBC
# SourceDescription: Monitoring data collected by University of Maryland, Baltimore County as part of the Urban Baltimore Social-Environmental Collaborative Urban Integrated Field Laboratory, funded by Department of Energy, and the Critical Zone Collaborative Network supported by National Science Foundation. 
# SourceLink: Null 
# ContactName: Claire Welty 
# Email: weltyc@umbc.edu 
# 
# 
# Censor Codes
# ----------------------------------
# gt: greater than
# lt: less than
# nc: not censored
# nd: non-detect
#
# UTC Offset
-------------------------------------
# UTCOffset: -5  
# -----------------------------------