The application of the HBV-6 conceptual runoff model to the Upper Narmada basin is surnmarized. The work includes an extensive investigation of the homogeneity of the precipitation stations anda discussion on the estimates of the potential evapotranspiration. A comparison between a lumped and a distributed model structure is made. Finally is shown how the model can be transformed into a set of nomograms for day-today simulations without support from computer.