Regional modelling of the Narayani basin in Nepal.
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Computing inflow from ungauged basins is a challenge in practical hydrology since many planning assignments is located in areas where no data is available. A number of methods are developed to handle ungauged basins with variable success. One method that could be useful is regional calibration of hydrological models where the idea is that a parameter set for model simultaneously calibrated for several catchments will be valid also for other catchments in the same region. The purpose of this MSc thesis is to investigate this for the Narayani basin in Nepal. The main topics of the work will be the following: 1. Prepare climate, runoff and catchment data for the Narayani basin for use in the SHyFT hydrological model. It should be paid particularly attention to runoff data for calibration and evaluation of the model. 2. Set up and calibrate the model for the Narayani region. 3. Study strategies for regionalization of the parameter set and evaluate it´s goodness and uncertainty. 4. Test the model for a number of catchments not included in the calibration on the ability to predict the duration curve, time series of flow and extremes.