The climate is humid subtropical and the annual precipitation varies from 127 cm at WCU to 178 cm in the headwaters.
Development in the watershed is generally sparse with the most intensive land use, including WCU, in the lower elevation, flatter part of the basin. Excess sedimentation is considered the largest environmental threat to aquatic systems in the region. Bedrock exposures on campus, mostly the product of human activity, include Late Proterozoic biotite gneiss, schist, and a minor amount of amphibolite. Alluvium, artificial fill, colluvium, and saprolite dominate the sediments observed on campus. Red, clay-rich Ultisols are developed in saprolite on most slopes on the WCU campus whereas loamy Inceptisols make up the floodplain of Cullowhee Creek.







