Modeling elements and geographical factors of formation of the monthly runoff as exemplified by the Kuda river

We have formulated the main principles of constructing the model for a seasonal cycle of the runoff with a temporal resolution of one month. We worked out the elements of technology for the first stages of model making. Based on analyzing the local data on monthly characteristics of the runoff, precipitation and temperature, we formulated and verified a number of hypotheses about the physicalgeographical patterns of formation of seasonal and interannual variability in water flow rates for three river discharge sections within the Kuda river basin. The most important factors have been determined, which govern the observed values of monthly mean flow rates.