Soil-Water-Balance (SWB) model data sets for the Greater Wake County area, North Carolina, 1981 - 2070

This data release has been deprecated. The new version can be found at https://doi.org/10.5066/P95XKK5V.

A Soil-Water-Balance (SWB) model was developed to estimate annual net infiltration below the root-zone for the Greater Wake County Area, North Carolina for the period 1981 through 2019 and project future estimates from 2020 through 2070. The model was developed as part of a study to assess groundwater availability in the fractured-rock aquifers underlying Wake County. The model is documented in the associated report, U.S. Geological Survey (USGS) Scientific Investigations Report 2022-5041. Comparison was done with annual base-flow estimates from the PART hydrograph separation technique for available years of streamflow record at 6 sites (02089000, 02087570, 02087324, 02087359, 02088500, 02097314) within the model area to annual net infiltration estimates from the SWB model. Curve number, maximum net infiltration rate, and root-zone depth parameters for all land cover classes were adjusted in the SWB model to manually test parameter sensitivity and adjust for best fit. The comparison results are included in this archive and the method is documented in the associated USGS Scientific Investigations Report.