期刊
HYDROLOGICAL SCIENCES JOURNAL
卷 65, 期 10, 页码 1667-1684出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02626667.2020.1754420
关键词
hydrological model; IHACRES; HEC-HMS; SWATgrid; Southeast Australia; land use; surface water-groundwater interaction
资金
- University of Newcastle International Postgraduate Research Scholarship (UNIPRS)
- University of Newcastle Postgraduate Research Scholarship Central [UNRSC 50:50]
- Australian Research Council [LP120200494]
- NSW Office of Environment and Heritage, Sydney Catchment Authority, Hunter Water Corporation
- NSW Office of Water
- NSW Department of Finance and Services
Understanding of rainfall-runoff model performance under non-stationary hydroclimatic conditions is limited. This study compared lumped (IHACRES), semi-distributed (HEC-HMS) and fully-distributed (SWATgrid) hydrological models to determine which most realistically simulates runoff in catchments where non-stationarity in rainfall-runoff relationships exists. The models were calibrated and validated under different hydroclimatic conditions (Average, Wet and Dry) for two heterogeneous catchments in southeast Australia (SEA). SWATgrid realistically simulates runoff in the smaller catchment under most hydroclimatic conditions but fails when the model is calibrated in Dry conditions and validated in Wet. All three models perform poorly in the larger catchment irrespective of hydroclimatic conditions. This highlights the need for more research aimed at improving the ability of hydrological models to realistically incorporate the physical processes causing non-stationarity in rainfall-runoff relationships. Although the study is focussed on SEA, the insights gained are useful for all regions which experience large hydroclimatic variability and multi-year/decadal droughts.
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