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

Table 9. Precipitation Runoff Modeling System parameters used in uncertainty analysis.

Name	Description	Possible range
carea_max	Maximum possible area contributing to surface runoff expressed as a portion of the HRU area	0 to 1
crad_coef	Coefficient(B) in Thompson(1976) equation	0.1 to 0.7
fastcoef_lin	Coefficient to route preferential-flow storage down slope	0 to 1
fastcoef_sq	Coefficient to route preferential-flow storage down slope	0 to 1
gwflow_coef	Groundwater routing coefficient	0 to 1
pref_flow_den	Preferential-flow pore density	0 to 1
slowcoef_lin	Coefficient to route gravity-flow storage down slope	0 to 1
slowcoef_sq	Coefficient to route gravity-flow storage down slope	0 to 1
smidx_coef	Coefficient in non-linear contributing area algorithm	0.0001 to 1
smidx_exp	Coefficient in non-linear contributing area algorithm	0.2 to 0.8
soil2gw_max	The maximum amount of the soil water excess for an HRU that is routed directly to the associated groundwater reservoir each day	0 to 5
ssr2gw_exp	Coefficient in equation used to route water from the subsurface reservoirs to the groundwater reservoirs	0 to 3
ssr2gw_rate	Coefficient in equation used to route water from the subsurface reservoirs to the groundwater reservoirs	0 to 1