I have 30 years daily rainfall data. How can i calculate the mean monthly runoff, minimum monthly runoff and maximum monthly runoff with the available rainfall data using GIS?
I would like to use SCS curve number method for run off computation.
??? presume you have no snowmelt and no baseflow to worry about? Curvve numbers only give respones to rainfall events.
OTBE there are models that do this. Often/mainly out of USDA. Suggest AGWA for openers. Try SWAT.