E&S recently updated the Ecosystem Management Decision Support (EMDS) system previously developed for the U.S. Forest Service (FS) by E&S and FS staff. Results of model scenarios showed that many southern Appalachian Mountain streams exhibited modest recovery of acid neutralizing capacity (ANC), but soil base saturation is not expected to recover to levels approaching pre-industrial conditions. One fourth of the study streams were determined to be in exceedance of their critical load (CL) of acidic deposition required to attain stream ANC=30 µeq/L by the year 2100. Data and model projections developed in this project will be helpful for forest land management and protection of base nutrients, including calcium, supplies in soils. Download the report.