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Model Averaging, Equifinality And Uncertainty Estimation In The Modelling Of Ungauged Catchments, J. P. C. Reichl, F. H. S. Chiew, A. W. Western
Model Averaging, Equifinality And Uncertainty Estimation In The Modelling Of Ungauged Catchments, J. P. C. Reichl, F. H. S. Chiew, A. W. Western
International Congress on Environmental Modelling and Software
The problem of estimating runoff in ungauged catchments remains an important but elusive one. Previous studies suggest that there are two important properties common to rainfall-runoff models: over-parameterisation, leading to parameter covariance; and equifinality, the existence of multiple parameter sets which reproduce the streamflow adequately. Both reduce parameter identifiability, impeding identification of relationships between model parameter values and catchment characteristics that would otherwise be useful for regionalisation. This study investigates the use of a model averaging framework to circumvent this problem. Multiple behavioural parameter sets arising from Monte-Carlo simulation are used from each catchment in order to retain information about …
Hydrological Characterisation Of Four Brazilian Catchments Using A Simple Rainfall-Streamflow Model, I. G. Littlewood, R. T. Clarke, W. Collischonnb, B. F. W. Croke
Hydrological Characterisation Of Four Brazilian Catchments Using A Simple Rainfall-Streamflow Model, I. G. Littlewood, R. T. Clarke, W. Collischonnb, B. F. W. Croke
International Congress on Environmental Modelling and Software
A rainfall–streamflow model featuring a unit hydrograph component is applied to four Brazilian catchments to characterise and quantify their quite different dynamic rainfall–streamflow behaviours. Using only catchment size (km2) and time series of daily rainfall, streamflow and air temperature, six dynamic response characteristics (DRCs) are estimated for each catchment. The DRCs include decay time constants for dominant quick- and slow-response components of streamflow, a time-averaged relative volumetric contribution to streamflow from slow flow (i.e. a slow flow index, SFI) and the size of a conceptual catchment wetness store. The six DRCs are compared for the four catchments in the context …
Regionalization Of Ihacres Model Parameters For In-Tegrated Assessment Across The Lake Erie, Northern Ohio Usa Basin, Richard M. Anderson, Jonathan L. Goodall
Regionalization Of Ihacres Model Parameters For In-Tegrated Assessment Across The Lake Erie, Northern Ohio Usa Basin, Richard M. Anderson, Jonathan L. Goodall
International Congress on Environmental Modelling and Software
The IHACRES model is being applied in a regionalization approach to develop streamflow predic-tions within the region of Northern Ohio, U.S.A. that drains into Lake Erie, located on the border between the U.S. and Canada. The approach to-date is based on independent univariate regressions of model parameters on watershed attributes for a collection of 11 watersheds. Anderson et al. (2005) used one of these regression relationships to represent possible effects of declining forest cover on streamflow, but did not obtain regional models for the parameters of the routing model of IHACRES. Here we apply and “validate” a regionaliza-tion approach to …
Evaluation Of A Physically Based Distributed Hydrological Model, Btopmc, For Different Physiographic Zones Of Nepal, K. N. Dulal, S. Shrestha, K. Takeuchi, H. Ishidaira
Evaluation Of A Physically Based Distributed Hydrological Model, Btopmc, For Different Physiographic Zones Of Nepal, K. N. Dulal, S. Shrestha, K. Takeuchi, H. Ishidaira
International Congress on Environmental Modelling and Software
Many rivers in Nepal are ungauged and there is an urgent need to develop a model for those ungauged basins in order to properly use the vast natural resources of Nepal. The aim of this study is to evaluate the performance of the distributed hydrological model, BTOPMC (Block-wise use of TOPMODEL with Muskingum-Cunge method) for different physiographic zones of Nepal and then to develop a regional model, which can be used for prediction in ungauged basins. It is advantageous to use BTOPMC for poorly gauged or ungauged basins as it utilizes various global datasets available in public domain. In this …
Model Averaging, Equifinality And Uncertainty Estimation In The Modelling Of Ungauged Catchments, J. P. C. Reichl, F. H. S. Chiew, A. W. Western
Model Averaging, Equifinality And Uncertainty Estimation In The Modelling Of Ungauged Catchments, J. P. C. Reichl, F. H. S. Chiew, A. W. Western
International Congress on Environmental Modelling and Software
The problem of estimating runoff in ungauged catchments remains an important but elusive one. Previous studies suggest that there are two important properties common to rainfall-runoff models: over-parameterisation, leading to parameter covariance; and equifinality, the existence of multiple parameter sets which reproduce the streamflow adequately. Both reduce parameter identifiability, impeding identification of relationships between model parameter values and catchment characteristics that would otherwise be useful for regionalisation. This study investigates the use of a model averaging framework to circumvent this problem. Multiple behavioural parameter sets arising from Monte-Carlo simulation are used from each catchment in order to retain information about …
Hydrological Characterisation Of Four Brazilian Catchments Using A Simple Rainfall-Streamflow Model, I. G. Littlewood, R. T. Clarke, W. Collischonnb, B. F. W. Croke
Hydrological Characterisation Of Four Brazilian Catchments Using A Simple Rainfall-Streamflow Model, I. G. Littlewood, R. T. Clarke, W. Collischonnb, B. F. W. Croke
International Congress on Environmental Modelling and Software
A rainfall–streamflow model featuring a unit hydrograph component is applied to four Brazilian catchments to characterise and quantify their quite different dynamic rainfall–streamflow behaviours. Using only catchment size (km2) and time series of daily rainfall, streamflow and air temperature, six dynamic response characteristics (DRCs) are estimated for each catchment. The DRCs include decay time constants for dominant quick- and slow-response components of streamflow, a time-averaged relative volumetric contribution to streamflow from slow flow (i.e. a slow flow index, SFI) and the size of a conceptual catchment wetness store. The six DRCs are compared for the four catchments in the context …
Regionalization Of Ihacres Model Parameters For In-Tegrated Assessment Across The Lake Erie, Northern Ohio Usa Basin, Richard M. Anderson, Jonathan L. Goodall
Regionalization Of Ihacres Model Parameters For In-Tegrated Assessment Across The Lake Erie, Northern Ohio Usa Basin, Richard M. Anderson, Jonathan L. Goodall
International Congress on Environmental Modelling and Software
The IHACRES model is being applied in a regionalization approach to develop streamflow predic-tions within the region of Northern Ohio, U.S.A. that drains into Lake Erie, located on the border between the U.S. and Canada. The approach to-date is based on independent univariate regressions of model parameters on watershed attributes for a collection of 11 watersheds. Anderson et al. (2005) used one of these regression relationships to represent possible effects of declining forest cover on streamflow, but did not obtain regional models for the parameters of the routing model of IHACRES. Here we apply and “validate” a regionaliza-tion approach to …
Evaluation Of A Physically Based Distributed Hydrological Model, Btopmc, For Different Physiographic Zones Of Nepal, K. N. Dulal, S. Shrestha, K. Takeuchi, H. Ishidaira
Evaluation Of A Physically Based Distributed Hydrological Model, Btopmc, For Different Physiographic Zones Of Nepal, K. N. Dulal, S. Shrestha, K. Takeuchi, H. Ishidaira
International Congress on Environmental Modelling and Software
Many rivers in Nepal are ungauged and there is an urgent need to develop a model for those ungauged basins in order to properly use the vast natural resources of Nepal. The aim of this study is to evaluate the performance of the distributed hydrological model, BTOPMC (Block-wise use of TOPMODEL with Muskingum-Cunge method) for different physiographic zones of Nepal and then to develop a regional model, which can be used for prediction in ungauged basins. It is advantageous to use BTOPMC for poorly gauged or ungauged basins as it utilizes various global datasets available in public domain. In this …