TY  - JOUR
A1  - Vormoor, Klaus Josef
A1  - Heistermann, Maik
A1  - Bronstert, Axel
A1  - Lawrence, Deborah
T1  - Hydrological model parameter (in)stability
BT  - "crash testing" the HBV model under contrasting flood seasonality conditions
JF  - Hydrological sciences journal = Journal des sciences hydrologiques
N2  - This paper investigates the transferability of calibrated HBV model parameters under stable and contrasting conditions in terms of flood seasonality and flood generating processes (FGP) in five Norwegian catchments with mixed snowmelt/rainfall regimes. We apply a series of generalized (differential) split-sample tests using a 6-year moving window over (i) the entire runoff observation periods, and (ii) two subsets of runoff observations distinguished by the seasonal occurrence of annual maximum floods during either spring or autumn. The results indicate a general model performance loss due to the transfer of calibrated parameters to independent validation periods of -5 to -17%, on average. However, there is no indication that contrasting flood seasonality exacerbates performance losses, which contradicts the assumption that optimized parameter sets for snowmelt-dominated floods (during spring) perform particularly poorly on validation periods with rainfall-dominated floods (during autumn) and vice versa.
KW  - hydrological modelling
KW  - flood seasonality
KW  - differential split-sample test
KW  - flood generating processes
KW  - Nordic catchments
Y1  - 2018
U6  - https://doi.org/10.1080/02626667.2018.1466056
SN  - 0262-6667
SN  - 2150-3435
VL  - 63
IS  - 7
SP  - 991
EP  - 1007
PB  - Routledge, Taylor & Francis Group
CY  - Abingdon
ER  - 
TY  - GEN
A1  - Vormoor, Klaus Josef
A1  - Heistermann, Maik
A1  - Bronstert, Axel
A1  - Lawrence, Deborah
T1  - Hydrological model parameter (in)stability
BT  - “crash testing” the HBV model under contrasting flood seasonality conditions
T2  - Hydrological Sciences Journal
N2  - This paper investigates the transferability of calibrated HBV model parameters under stable and contrasting conditions in terms of flood seasonality and flood generating processes (FGP) in five Norwegian catchments with mixed snowmelt/rainfall regimes. We apply a series of generalized (differential) split-sample tests using a 6-year moving window over (i) the entire runoff observation periods, and (ii) two subsets of runoff observations distinguished by the seasonal occurrence of annual maximum floods during either spring or autumn. The results indicate a general model performance loss due to the transfer of calibrated parameters to independent validation periods of −5 to −17%, on average. However, there is no indication that contrasting flood seasonality exacerbates performance losses, which contradicts the assumption that optimized parameter sets for snowmelt-dominated floods (during spring) perform particularly poorly on validation periods with rainfall-dominated floods (during autumn) and vice versa.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 459 
KW  - hydrological modelling
KW  - flood seasonality
KW  - differential split-sample test
KW  - flood generating processes
KW  - Nordic catchments
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-413008
ER  -