I am looking for papers that have analyzed the impact of high artificial upstream storages in a watershed upon the applicability of the curve number method for runoff estimation.
There is version of the curve number application in Excel called "Wildcat 5" for use on a PC. I have attached the manual for Wildcat 5 where the authors discuss how to incorporate reservoirs into the curve number technology. Wildcat 5 isa 2014 Excel application, and I am not sure if it still works. You can download it from this site: https://www.fs.usda.gov/biology/nsaec/products-tools.html