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Variables used from the Probabilistic Survey Data
The Probabilistic Sampling databrowser brings together data from the two major datasets comprising the Wadeable Streams Assessment in a uniform interface that provides access to a large number of variables found in these datasets. Detailed variable descriptions are given below. The following table summarizes the data found in the databrowser:
- 54 Watershed variables
- 75 Site Condition variables
- 56 Benthic Macroinvertebrate variables
- 35 Water Chemistry variables
- 5 Categorical variables
Watershed
The following list of 54 watershed variables are available. The all-caps name used internallly matches the variable names defined in the EMAP West and WSA datasets. These names may be familiar to scientists already aquainted with these datasets. The descriptive text appears in the Probabilistic Sampling databrowser's variable selectors.
- XBKA
- Bank Angle--mean (degrees)
- AG_TOT
- % Watershed Ag (NLCD-81,82,83,84,61)
- ASPCTDEG
- Aspect of Watershed Longest Dimension
- BAR_TOT
- % Watershed Barren (NLCD-31,33)
- DAMCOUNT
- National Inventory of Dams Count
- DISTOT
- URB_TOT + AG_TOT + MINE_TOT
- DOMECO3
- Dominant L3 Ecoregion (max% of watershed)
- ELEVMAX
- Max Watershed Elevation (m)
- ELEVMEAN
- Mean Watershed Elevation (m)
- ELEVMIN
- Min Watershed Elevation (m)
- ELEVSTD
- STD Watershed Elevation (m)
- FOR_TOT
- % Watershed Forest (NLCD-41,42,43)
- GRAZING
- Potential for water degradation due to grazing
- H2O_TOT
- % Watershed Water (NLCD-11)
- HYPSOINT
- Hypsometric Integral
- KM_SEA
- Straight-line Distance to Ocean (km)
- LTROFF_M
- Annual Runoff (m)
- MINES
- Active + Abandoned Surface Mine Count
- MINE_TOT
- % Watershed Mines (NLCD-32)
- NLCD_11
- % Open Water
- NLCD_12
- % Perennial Ice/Snow
- NLCD_21
- % Low Intensity Residential
- NLCD_22
- % High Intensity Residential
- NLCD_23
- % Commercial/Industrial/Transportation
- NLCD_31
- % Bare Rock/Sand/Clay
- NLCD_32
- % Quarries/Strip Mines/Gravel Pits
- NLCD_33
- % Transitional
- NLCD_41
- % Deciduous Forest
- NLCD_42
- % Evergreen Forest
- NLCD_43
- % Mixed Forest
- NLCD_51
- % Shrubland
- NLCD_61
- % Orchards/Vineyards/Other
- NLCD_71
- % Grasslands/Herbaceous
- NLCD_81
- % Pasture/Hay
- NLCD_82
- % Row Crops
- NLCD_83
- % Small Grains
- NLCD_84
- % Fallow
- NLCD_85
- % Urban/Recreational Grasses
- NLCD_91
- % Woody Wetlands
- NLCD_92
- % Emergent Herbaceous Wetlands
- NON_RES
- % Watershed Non-Residential Urban (NLCD-23)
- POPDENKM
- Population Density (persons/sq km)
- PRECIP_M
- Annual Precipitation (m)
- RD_DEN
- Road Density (m/ha)
- RNG_TOT
- % Watershed Rangeland (NLCD_71,51)
- ROUGHNES
- Terrain Roughness (unitless)
- SLOPMEAN
- Mean Watershed Slope (%)
- STRAHLER
- Strahler Order from RF3 Stream Data
- TUN_TOT
- % Watershed Tundra (NLCD-12)
- URB_TOT
- % Watershed Urban (NLCD-21,22,23,85)
- WETL_TOT
- % Watershed Wetlands (NLCD-91,92)
- WSAREAKM
- Watershed Area Digitized from Maps (sq km)
- WSLOCLKM
- Local Watershed Area if Interbasin Transfers
- XELEV
- Elevation at the X-site (m)
Site Condition
The following list of site 75 site condition variables are available. The all-caps name used internallly matches the variable names defined in the EMAP West and WSA datasets. These names may be familiar to scientists already aquainted with these datasets. The descriptive text appears in the Probabilistic Sampling databrowser's variable selectors.
- XBKA
- Bank Angle--mean (degrees)
- XUN
- Undercut Distance--Mean (m)
- XBKF_W
- Bankfull Width--Mean (m)
- XBKF_H
- Bankfull Height-Mean (m)
- XINC_H
- Channel Incision Ht.-Mean (m)
- XPCM
- Rip Can & MidLayer Present (Frac. reach)
- XPCMG
- Riparian 3-Layers Present (Fract. reach)
- XPMG
- Riparian mid & gnd Present (Frac. reach)
- XPMGH
- Rip. mid & gnd herb Present (Frac. reach)
- XPMGW
- Rip. mid & gnd wood Present (Frac. reach)
- XCL
- Riparian Canopy > 0.3m DBH (Cover)
- XGB
- Rip Ground Layer Barren (Cover)
- XC
- Riparian Veg Canopy Cover
- XG
- Riparian Veg Ground Layer Cover
- XCMW
- Rip Veg Canopy+Mid Layer Woody Cover
- XCMGW
- Rip Veg Canopy+Mid+Ground Woody Cover
- PCAN_C
- Riparian Canopy Coniferous (Fract reach)
- XCDENBK
- Mean Bank Canopy Density (%)
- XCDENMID
- Mean Mid-channel Canopy Density (%)
- XEMBED
- Mean Embeddedness--Channel+Margin (%)
- XFC_ALG
- Fish Cvr-Filamentous Algae (Areal Prop)
- XFC_AQM
- Fish Cvr-Aq. Macrophytes (Areal Prop)
- XFC_LWD
- Fish Cvr-Large Woody Debris (Areal Prop)
- XFC_BRS
- Fish Cvr-Brush&Small Debris (Areal Prop)
- XFC_OHV
- Fish Cvr-Overhang Veg (Areal Prop)
- XFC_UCB
- Fish Cvr-Undercut Banks (Areal Prop)
- XFC_RCK
- Fish Cvr-Boulders (Areal Prop)
- XFC_HUM
- Fish Cvr-Artif. Structs. (Areal Prop)
- XFC_ALL
- Fish Cvr-All Types (Sum Areal Prop)
- XFC_NAT
- Fish Cvr-Natural Types (Sum Areal Prop)
- XFC_BIG
- Fish Cvr-LWD,RCK,UCBorHUM(Sum Area Prop)
- W1_HALL
- Rip Dist--Sum All Types (ProxWt Pres)
- W1_HNOAG
- Rip Dist--Sum NonAg Types (ProxWt Pres)
- W1_HAG
- Rip Dist--Sum Agric Types (ProxWt Pres)
- W1H_WALL
- Rip Dist--Wall/Bank Revet. (ProxWt Pres)
- W1H_PIPE
- Rip Dist--Pipes infl/effl (ProxWt Pres)
- LSUB_DMM
- Substrate-Mean Log10(Diam Class mm)
- LTEST
- Log10[Erodible Substr Dia.(mm)]-Fast est
- LRBS_TST
- Log10[Relative Bed Stability] - Fast est
- LDMB_BW5
- Log10[Erodible Substr Dia.(mm)]-Est. 2
- LRBS_BW5
- Log10[Relative Bed Stability] - Est. 2
- REACHLEN
- Length of sample reach (m)
- XSLOPE
- Channel Slope -- reach mean (%)
- XDEPTH
- Thalweg Mean Depth (cm)
- RPGT75
- Resid Pools >75cm deep (number/reach)
- RPGT100
- Resid Pools >100cm deep (number/reach)
- RPMXDEP
- Maximum residual depth in reach (cm)
- RPXAREA
- Mean vert. profile area of RPs (m2/pool)
- RP100
- Mean Residual Depth (m2/100m)
- PCT_FN
- Substrate Fines -- Silt/Clay/Muck (%)
- PCT_SA
- Substrate Sand -- .06-2 mm (%)
- PCT_HP
- Substrate Hardpan -- (%)
- PCT_RC
- Substrate Concrete (%)
- PCT_SAFN
- Substrate Sand & Fines -- <2 mm (%)
- PCT_SFGF
- Substrate <= Fine Gravel (<=16 mm) (%)
- PCT_BIGR
- Substrate >= Coarse Gravel (>16 mm) (%)
- PCT_BDRK
- Substrate Bedrock (%)
- PCT_ORG
- Substrate Wood or Detritus -- (%)
- LSUBD_SD
- Substrate-StDev LOG10(Diam Class mm)
- V1W_MSQ
- LWD Vol in Bkf chnl (m3/m2-all sizes)
- V4W_MSQ
- LWD Vol in Bkf chnl (m3/m2-L,X)
- V1TM100
- LWD Vol in/abv Bf chan(#/100m-all sizes)
- V4TM100
- LWD Vol in/abv Bf chan (#/100m-L,X)
- SINU
- Channel Sinuosity (m/m)
- SDDEPTH
- Std Dev of Thalweg Depth (cm)
- XWIDTH
- Wetted Width -- Mean (m)
- XWXD
- Mean Width*Depth Product (m2)
- XWD_RAT
- Mean Width/Depth Ratio (m/m)
- SDWXD
- Std Dev of Width*Depth Product (m2)
- PCT_FA
- Falls (% of reach)
- PCT_FAST
- Fast Wtr Hab (% riffle & faster)
- PCT_SLOW
- Slow Wtr Hab (% Glide & Pool)
- PCT_POOL
- Pools -- All Types (% of reach)
- PCT_DRS
- Dry Channel or Subsurf Flow (%)
- PCT_SIDE
- Side channel presence (% of reach)
Benthic Macroinvertebrates
The following list of 56 benthic macroinvertebrate variables are available. The all-caps name used internallly matches the variable names defined in the EMAP West and WSA datasets. These names may be familiar to scientists already aquainted with these datasets. The descriptive text appears in the Probabilistic Sampling databrowser's variable selectors.
- TOTLNIND
- Total Number of Individuals
- TOTLRICH
- Total Distinct Taxa Richness
- TOTLDENS
- Macroinvertebrate Density (number/m2)
- DOM1PIND
- Percent of Individuals in Dominant Taxa
- DOM3PIND
- Percent of Individuals in Top 3 Taxa
- DOM5PIND
- Percent of Individuals in Top 5 Taxa
- HPRIME
- Shannon Diversity
- SIMPSON
- Simpson Index
- HBI
- Hilsenhoff Biotic Index
- CHIRRICH
- Chironomid Distinct Taxa Richness
- CHIRPTAX
- Chironomid % Distinct Taxa
- CHIRPIND
- Chironomid % Individuals
- EPHERICH
- Ephemeroptera Distinct Taxa Richness
- EPHEPTAX
- Ephemeroptera % Distinct Taxa
- EPHEPIND
- Ephemeroptera % Individuals
- EPT_RICH
- EPT Distinct Taxa Richness
- EPT_PTAX
- EPT % Distinct Taxa
- EPT_PIND
- EPT % Individuals
- NOINRICH
- Non-Insect Distinct Taxa Richness
- NOINPTAX
- Non-Insect % Distinct Taxa
- NOINPIND
- Non-Insect % Individuals
- OLLERICH
- Oligochaete/Leech Distinct Taxa Richness
- OLLEPTAX
- Oligochaete/Leech % Distinct Taxa
- OLLEPIND
- Oligochaete/Leech % Individuals
- PLECRICH
- Plecoptera Distinct Taxa Richness
- PLECPTAX
- Plecoptera % Distinct Taxa
- PLECPIND
- Plecoptera % Individuals
- TRICRICH
- Trichoptera Distinct Taxa Richness
- TRICPTAX
- Trichoptera % Distinct Taxa
- TRICPIND
- Trichoptera % Individuals
- COFIRICH
- Collector-Filterer Distinct Taxa Richness
- COFIPTAX
- Collector-Filterer % Distinct Taxa
- COFIPIND
- Collector-Filterer % Individuals
- COGARICH
- Collector-Gatherer Distinct Taxa Richness
- COGAPTAX
- Collector-Gatherer % Distinct Taxa
- COGAPIND
- Collector-Gatherer % Individuals
- PREDRICH
- Predator Distinct Taxa Richness
- PREDPTAX
- Predator % Distinct Taxa
- PREDPIND
- Predator % Individuals
- SCRPRICH
- Scraper Distinct Taxa Richness
- SCRPPTAX
- Scraper % Distinct Taxa
- SCRPPIND
- Scraper % Individuals
- SHRDRICH
- Shredder Distinct Taxa Richness
- SHRDPTAX
- Shredder % Distinct Taxa
- SHRDPIND
- Shredder % Individuals
- INTLRICH
- Intolerant Distinct Taxa Richness
- INTLPTAX
- Intolerant % Distinct Taxa
- INTLPIND
- Intolerant % Individuals
- FACLRICH
- Facultative Distinct Taxa Richness
- FACLPTAX
- Facultative % Distinct Taxa
- FACLPIND
- Facultative % Individuals
- TOLRRICH
- Tolerant Distinct Taxa Richness
- TOLRPTAX
- Tolerant % Distinct Taxa
- TOLRPIND
- Tolerant % Individuals
- NUMTRANS
- Number of Transect Samples Composited
- PCTCOUNT
- Percent of Sample Counted
Water Chemistry
The following list of 35 water chemistry variables are available. The all-caps name used internallly matches the variable names defined in the EMAP West and WSA datasets. These names may be familiar to scientists already aquainted with these datasets. The descriptive text appears in the Probabilistic Sampling databrowser's variable selectors.
- ALKCALC
- Calculated Alkalinity (ueq/L)
- ANC
- Gran ANC (ueq/L)
- ANDEF
- Anion Deficit [C-A] (ueq/L)
- ANSUM
- Sum of Anions (ueq/L)
- BALANCE
- Ion Balance [C-A]/[C+A/2] (%)
- CA
- Calcium (ueq/L)
- CATSUM
- Sum of Cations (ueq/L)
- CL
- Chloride (ueq/L)
- CO3
- Calculated Carbonate (ueq/L)
- COLOR
- Color (PCU)
- CONCAL
- Calculated Conductivity (uS/cm)
- COND
- Conductivity (uS/cm @ 25 C)
- CONDHO
- Debye-Huckel-Onsager Calc. Cond. (uS/cm)
- DIC
- Dissolved Inorganic Carbon (mg/L)
- DOC
- Dissolved Organic Carbon (mg/L)
- H
- H+ from PHSTVL (ueq/L)
- HCO3
- Calculated Bicarbonate (ueq/L)
- IONSTR
- Ionic Strength (M)
- K
- Potassium (ueq/L)
- MG
- Magnesium (ueq/L)
- NA
- Sodium (ueq/L)
- NH4
- Ammonium (ueq/L)
- NO3
- Nitrate (ueq/L)
- NTL
- Total Nitrogen (ug/L)
- OH
- Hydroxide from PHSTVL (ueq/L)
- ORGION
- Est. Organic Anion (ueq/L)
- PHSTVL
- Closed Headspace pH
- PTL
- Total Phosphorus (ug/L)
- SE
- Dissolved Selenium (ug/L)
- SIO2
- Silica (mg/L SiO2)
- SO4
- Sulfate (ueq/L)
- SOBC
- Sum of Base Cations (ueq/L)
- TSS
- Total Suspended Solids (mg/L)
- TURB
- Turbidity (NTU)
- ZN
- Dissolved Zinc (ug/L)
Categorical Variables
Categorical variables are non-continuous variables that can be used as factors to split the data up into categories of interest. In the Probabilistic Sampling databrowser, the following 5 categorical variables are available from the EMAP West and WSA datasets.
- ALL_SITES
- Single category
- STATE
- State
- YEAR
- Year of visit to site
- STRAHLER
- Strahler Order from RF3 Stream Data
- AGG_ECO_9
- Aggregated Nine Level Ecoregion. (This variable is created by aggregating the Omernik Level 3 ecoregion codes available in the datasets.)