Subject: Extending a calibrated model setup to a larger catchment using calibrated parameters Posted: 8/6/2021 Viewed: 6407 times
I have set up and calibrated model for a certain catchment of a River basin using soil moisture method. the model performed quite well. But when I extended the model for a larger catchment having outlet in the downstream of the previously calibrated model on the same River, the catchments runoff has shown unusual peaks, while I used the same parameter values which were earlier used for the calibration.
Please help me to know what is the probable reason for this kind of error.
Mr. Doug Chalmers
Subject: Re: Extending a calibrated model setup to a larger catchment using calibrated parameters Posted: 2/5/2025 Viewed: 503 times
If you have a model well calibrated for one catchment and gauge location, but the same parameters do not provide a good calibration for a different gauge location-
Generally, the same hydrology parameters are used across all catchments in a model. So, if this isn't working well, then overall, two problems are possible. One is that you achieved good results, but did not accurately capture the underlying processes. You can view the Soil Moisture (Z1, Z2) results to see if it behaves reasonably. It may also be possible that there are processes occurring in this other area that your model is not capturing. Are there inflows or demands or groundwater interactions you aren't modeling? Is perhaps the hydrology or geology so different between these areas that you need different hydrology parameters?
Topic "Extending a calibrated model setup to a larger catchment using calibrated parameters"
