On the evaluation of parameter values in models of the water balance

Data of groundwater levels and run-off values of a watershed may occasionally be available together and in sufficiently large amounts that it is worthwhile to try to get as much information on the hydrology of the watershed out of these data as possible. These possibilities are being studied with models of the water balance equation, because run-off is one item on the water balance and groundwater level fluctuations are the result of interplay of all items. In this paper results are discussed of the application of a model of the water balance on data from watersheds in the district of Salland in the province of Overijssel, collected in the years 1970, 1971 and 1972