Impact of reference evapotranspiration method selection on hydrologic partitioning and climate sensitivity in forest-dominated watersheds
Description
The supplemental materials include equations for actual evapotranspiration used in different methods in the Soil and Water Assessment Tool (SWAT) or the South Carolina Hydrologic and Water Quality System (SC.HAWQS). To provide details on the development and evaluation of the SC. HAWQS: the file includes a table listing calibrated watersheds in South Caroline (SC); Land use (%) across the six watersheds; Input data summary of SC. HAWQS; list of 11 USGS gauges used to calibrate streamflow for SC. HAWQS; calibration statistics for the six watersheds of SC.HAWQS; calibrated parameters for different watersheds; parameters used for aerodynamic resistance (ra) and canopy resistance (rc) calculations; maximum stomatal conductance (GSI) reported in different studies; and relative errors of different hydrologic processes simulated by different potential evapotranspiration methods in different watersheds. The file also includes figures of land use distribution of South Carolina, the dominant suborders of Ultisols in the United States; comparison of measured and simulated daily discharges at different sites; comparison of reference evapotranspiration (ETref) using different methods; relative errors (%) of ETref calculated using (a) pine (evergreen) and (b) oak (deciduous) compared with the reference surface in SWAT under different meteorological conditions; amd relative error (%) of the SWAT-PM method compared with the FAO-PM method under different meteorological conditions.