USGS Open-File Report 2012-1274 - Potential Climate-Induced Runoff Changes and Associated Uncertainty in Four Pacific Northwest Estuaries

Table 6. Hydrologic Response Unit parameters derived from Geographic Information System data.

Name	Description	GIS data source
cov_type	Vegetation cover type for each HRU (bare, grass, shrubs, trees)	2001 USGS National LULC
covden_sum	Summer vegetation cover density for each HRU	2001 USGS National LULC
covden_win	Winter vegetation cover density for each HRU	2001 USGS National LULC
hru_aspect	Mean aspect of each HRU	USGS 30 m DEM
hru_elev	Mean elevation of each HRU	USGS 30 m DEM
hru_lat	Latitude of each HRU	--
hru_percent_imperv	Proportion of each HRU area that is impervious	2001 USGS National Impervious Surface
hru_slope	Mean slope of each HRU	USGS 30 m DEM
hru_type	Type of each HRU (land, water, swale)	2001 USGS National LULC
jh_coef_hru	Air temperature coefficient used in Jensen-Haise PET computations for each HRU.	2001 USGS National LULC
rad_trncf	Transmission coefficient for short-wave radiation through the winter vegetation canopy	2001 USGS National LULC
snow_intcp	Snow interception storage capacity for each HRU	2001 USGS National LULC
snow_intcp	Snow interception storage capacity for the major vegetation type in each HRU	2001 USGS National LULC
soil_moist_max	Maximum available water holding capacity of soil profile for each HRU	USDA SSURGO and USGS LULC
soil_rechr_max	Maximum value for soil recharge zone for each HRU	USDA SSURGO and USGS LULC
soil_type	HRU soil type (sand, clay, or loam)	USDS SSURGO Soil Maps
srain_intcp	Summer rain interception storage capacity each HRU	2001 USGS National LULC
tmax_adj	Adjustment to max. temp. for each HRU based on slope and aspect	USGS 30 m DEM
tmin_adj	Adjustment to min. temp. for each HRU based on slope and aspect	USGS 30 m DEM
wrain_intcp	Winter rain interception storage capacity each HRU	2001 USGS National LULC