Calibrate the HBV model for the HBV-land catchment for the period 1981-09-01 to 1991-08-31 (warm-up period starting at 1981-01-01). This catchment behaves exactly as the HBV model sees the world, therefore you might be able to achieve a perfect fit (Reff=1).
- Try to calibrate the model. It is a good idea to start with the snow routine to get the spring flood right, then work on the soil-routine parameters to get the water balance ok and finally fix the response function. You might have to do this in iterations.
- During calibration look also on different variables, i.e. soil moisture, storage in the upper groundwater box, ... .
- Once you you have reached a perfect fit (or have received the 'true'parameter values by kindly asking your teacher), you may again change parameter values and study the effects of different parameter values
- Change one (or two) of the following parameter: TT, CFMAX, FC, BETA, LP, K0, K1, K2, PERC, UZL, MAXBAS, SFCF.
- Discuss - before running the model - what effect You expect (i.e. more runoff during spring, slower response to rain, ...)
- Run the model and look on the deviation of the simulated runoff (red line) from the 'recorded' runoff (blue line).
- Make a note of each change of a parameter value and its effect to the simulation.
- Change the parameter value back to its original value.
- Continue with 2.
Exercise 2
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