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Journal Article

Investigating the impact of calibration timescales on streamflow simulation, parameter sensitivity and model performance for Indian catchments

Authors

Setti,  Sridhara
External Organizations;

Barik,  Kamal Kumar
External Organizations;

/persons/resource/bmerz

Merz,  B.
4.4 Hydrology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/aagarwal

Agarwal,  Ankit
4.4 Hydrology, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Rathinasamy,  Maheswaran
External Organizations;

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5009866.pdf
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Supplementary Material (public)
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Citation

Setti, S., Barik, K. K., Merz, B., Agarwal, A., Rathinasamy, M. (2022): Investigating the impact of calibration timescales on streamflow simulation, parameter sensitivity and model performance for Indian catchments. - Hydrological Sciences Journal - Journal des Sciences Hydrologiques, 67, 5, 661-675.
https://doi.org/10.1080/02626667.2022.2036340


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5009866
Abstract
Hydrological model calibration is a quintessential step in model development and the time scale of calibration depends on the application. However, the implications of choice of time scale of calibration ACCEPTED MANUSCRIPT 2 have not been explored extensively. Here, we evaluate the effect of the timescale of calibration on model sensitivity, best parameter ranges, and predictive uncertainty for three river basins using the SWAT model. Multiple models were setup for three different catchments from southern India. Our results showed that the sensitivity of the parameters, best parameter ranges, and model performance is conditioned on the timescale of calibration. The models calibrated at coarser time scales marginally outperformed the models calibrated at fine time scale in terms of Nash-Sutcliffe Efficiency and percentage bias. Transfer of parameters across scales (both from coarse to fine and fine to coarse) have general tendency to worsen the model performance in all three catchments, leaving for few exceptions.