Entity_Type:
Entity_Type_Label: NFWF_water_samples.csv
Entity_Type_Definition:
Suspended-sediment concentration (SSC) and loss-on-ignition (LOI) of collected water samples.
Entity_Type_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: Sample ID
Attribute_Definition: Sample identifier.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Station ID
Attribute_Definition: Station identifier.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Sample Date
Attribute_Definition: Calendar date (dd-mmm-yy) when water sample was collected.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Sample time (UTC)
Attribute_Definition:
Time in universal coordinated time (UTC) and 24-hour format HH:MM:SS when water sample was collected.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Latitude
Attribute_Definition:
Latitude coordinate, in decimal-degrees, of sample location. South latitude recorded as negative values.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 39.02573
Range_Domain_Maximum: 39.22254
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001
Attribute:
Attribute_Label: Longitude
Attribute_Definition:
Longitude coordinate, in decimal degrees, of sample location. West longitude is recorded as negative values.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -75.02975
Range_Domain_Maximum: -74.78235
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001
Attribute:
Attribute_Label: Total Depth (m)
Attribute_Definition: Total water depth at time of sample.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 4.8
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Sample Depth (m)
Attribute_Definition: Depth of water sample collection from surface.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 4.0
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Filter number
Attribute_Definition:
Manufacturer's filter ID number. A "+" between filter numbers means the sample was split between filters, and then the volume and weights were combined together in the final results.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Filter Weight (g)
Attribute_Definition: Weight of filter only, i.e. prior to filtering sample.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1071
Range_Domain_Maximum: 0.3582
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Sample Volume (ml)
Attribute_Definition: Volume of water sample passed through the filter.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 190
Range_Domain_Maximum: 565
Attribute_Units_of_Measure: milliliters
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: Dried at 105C Weight 1 (g)
Attribute_Definition:
Mass from first dry-weighing of filter plus residue retained on filter from sample after filtering and drying.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1182
Range_Domain_Maximum: 0.4784
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Dried at 105C Weight 2 (g)
Attribute_Definition:
Mass from second dry-weighing of filter plus residue retained on filter from sample after filtering and drying.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1178
Range_Domain_Maximum: 0.4784
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Muffled at 550C Weight 1 (g)
Attribute_Definition:
Mass from first dry-weighing of filter plus residue retained on filter after muffling at 550C.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1154
Range_Domain_Maximum: 0.4596
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Muffled at 550C Weight 2 (g)
Attribute_Definition:
Mass from second dry-weighing of filter plus residue retained on filter after muffling at 550C.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1156
Range_Domain_Maximum: 0.4587
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Dried Sediment Mass (g)
Attribute_Definition:
Mass of dried residue on filter = Dried weight (average of both weights) - Filter weight.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0029
Range_Domain_Maximum: 0.1202
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Muffled Sediment Mass (g)
Attribute_Definition:
Mass of muffled residue on filter = Muffled weight (average of both weights) - Filter weight.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0019
Range_Domain_Maximum: 0.1010
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Mass LOI (g)
Attribute_Definition:
Mass of volatile solids retained on the filter that were removed when combusted (loss-on-ignition) = Dried Sediment Mass - Muffled Sediment Mass.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0010
Range_Domain_Maximum: 0.0193
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Fraction LOI
Attribute_Definition:
Ratio of mass of retained solids that were removed when combusted (loss-on-ignition) to the total mass of dried solids retained on the filter = (Mass LOI) / (Dried Sediment Mass).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0426
Range_Domain_Maximum: 0.3908
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Total Dried Sediment Mass (g)
Attribute_Definition:
Sum of Dried Sediment Mass for all filters used for a single water sample. Same as Dried Sediment Mass if only one filter was used for a sample.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0029
Range_Domain_Maximum: 0.1202
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Total Muffled Sediment Mass (g)
Attribute_Definition:
Sum of Muffled Sediment Mass for all filters used for a single water sample. Same as Muffled Sediment Mass if only one filter was used for a sample.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0019
Range_Domain_Maximum: 0.1010
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Total Mass LOI (g)
Attribute_Definition:
Sum of LOI Mass (loss-on-ignition) for all filters used for a single water sample. Same as LOI Mass if only one filter was used for a sample.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0010
Range_Domain_Maximum: 0.0193
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Total Fraction LOI
Attribute_Definition:
Ratio of total mass of retained solids that were removed when combusted (loss-on-ignition) to the total mass of dried solids retained on filter(s) for a sample = (Total Mass LOI) / (Total Dried Sediment Mass).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0426
Range_Domain_Maximum: 0.3908
Attribute_Units_of_Measure: grams
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: SSC (g l-1)
Attribute_Definition:
Suspended-sediment concentration (SSC) for a sample = (Total Dried Sediment Mass) / (Sample Volume).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0056
Range_Domain_Maximum: 0.2732
Attribute_Units_of_Measure: grams per liter
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Inorganic SSC (g l-1)
Attribute_Definition:
Suspended sediment concentration (SSC) of inorganic solids in a sample = (Total Muffled Mass) / (Sample Volume).
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0035
Range_Domain_Maximum: 0.2294
Attribute_Units_of_Measure: grams per liter
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Filtration Date
Attribute_Definition: Calendar date (dd-mmm-yy) when water sample was filtered.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Entity_and_Attribute_Overview:
These data are available in a .csv format and an Esri shapefile. The first line of the .csv file is a header line and those labels are the same as defined in the attribute section. The shapefile has the same fields as the .csv file and two additional attributes, FID (an internal feature number) and Shape (feature geometry). Please note that some of the field names in the shapefile were modified to include underscores instead of spaces and hyphens and truncated to 10 characters since a shapefile has restrictions on field name characters and length.
Entity_and_Attribute_Detail_Citation:
USGS Field Activities 2018-048-FA, 2018-056-FA, 2018-059-FA, 2019-006-FA, 2019-016-FA, 2019-023-FA, 2019-028-FA, 2019-036-FA, 2022-013-FA, 2023-015-FA, and 2023-016-FA.