Urban hydrological response unit [parameters] calibration and verification for conceptual hydrological model METQ
2017
Grinfelde, I., Latvia Univ. of Agriculture, Jelgava (Latvia) | Bakute, A., Expertisecentrum Regelgeving Bouw, Delft (Netherland)
The growing urbanization level significantly impacts the hydrological regime of streams and rivers. Land use is changed and natural areas are transformed to living areas or industrial parks. The conceptual hydrological model METQ is developed by the Latvia University of Agriculture to calculate total run-off for different purposes. However, it was developed for rural areas and is missing the urban hydrological response unit. The aim of this research is to calibrate and verify the urban hydrological response unit parameters of the conceptual hydrological model METQ. In Latvia, there is no hydrometric station with urban catchment area and in Europe there was not possibility to get enough long run-off and meteorological data set. Free access run-off and meteorological data from the United States Geological Survey were used in this research. The calibration was made using Monte Carlo simulations. To evaluate the calibration results Nash–Sutcliffe efficiency index (NSE), determination coefficient R 2, percent bias (PBIAS), ratios the root mean square error to the standard deviation of measured data (RSR) in addition to the graphical method were used. The calibration and validation results of the urban hydrological response unit parameters were satisfactory and achieved the recommended limits NSE is larger than 0.5; R2 is larger than 0.75; RSR is less than 0.70 and PBIAS +/- 25 % for all six catchments. There is variation of the parameter values between catchments, which is related with the urbanization level and hydrogeological conditions of the catchment. This paper gives recommendations for hydrological response unit parameter application for the conceptual hydrological model METQUL2012.
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