scholarly journals Parameter regionalization of a monthly water balance model for the conterminous United States

2015 ◽  
Vol 12 (9) ◽  
pp. 10023-10066 ◽  
Author(s):  
A. R. Bock ◽  
L. E. Hay ◽  
G. J. McCabe ◽  
S. L. Markstrom ◽  
R. D. Atkinson
Keyword(s):  
United States ◽  
Water Balance ◽  
Water Balance Model ◽  
Balance Model ◽  
Efficiency Coefficient ◽  
Good Correspondence ◽  
Hydrologic Response Units ◽  
Monthly Water Balance ◽  
Parameter Values ◽  
Uncertainty Information

Abstract. A parameter regionalization scheme to transfer parameter values and model uncertainty information from gaged to ungaged areas for a monthly water balance model (MWBM) was developed and tested for the conterminous United States (CONUS). The Fourier Amplitude Sensitivity Test, a global-sensitivity algorithm, was implemented on a MWBM to generate parameter sensitivities on a set of 109 951 hydrologic response units (HRUs) across the CONUS. The HRUs were grouped into 110 calibration regions based on similar parameter sensitivities. Subsequently, measured runoff from 1575 streamgages within the calibration regions were used to calibrate the MWBM parameters to produce parameter sets for each calibration region. Measured and simulated runoff at the 1575 streamgages showed good correspondence for the majority of the CONUS, with a median computed Nash–Sutcliffe Efficiency coefficient of 0.76 over all streamgages. These methods maximize the use of available runoff information, resulting in a calibrated CONUS-wide application of the MWBM suitable for providing estimates of water availability at the HRU resolution for both gaged and ungaged areas of the CONUS.

scholarly journals Parameter regionalization of a monthly water balance model for the conterminous United States

2016 ◽  
Vol 20 (7) ◽  
pp. 2861-2876 ◽  
Author(s):  
Andrew R. Bock ◽  
Lauren E. Hay ◽  
Gregory J. McCabe ◽  
Steven L. Markstrom ◽  
R. Dwight Atkinson
Keyword(s):  
United States ◽  
Water Balance ◽  
Water Balance Model ◽  
Balance Model ◽  
Efficiency Coefficient ◽  
Fourier Amplitude ◽  
Good Correspondence ◽  
Hydrologic Response Units ◽  
Monthly Water Balance ◽  
Parameter Values

Abstract. A parameter regionalization scheme to transfer parameter values from gaged to ungaged areas for a monthly water balance model (MWBM) was developed and tested for the conterminous United States (CONUS). The Fourier Amplitude Sensitivity Test, a global-sensitivity algorithm, was implemented on a MWBM to generate parameter sensitivities on a set of 109 951 hydrologic response units (HRUs) across the CONUS. The HRUs were grouped into 110 calibration regions based on similar parameter sensitivities. Subsequently, measured runoff from 1575 streamgages within the calibration regions were used to calibrate the MWBM parameters to produce parameter sets for each calibration region. Measured and simulated runoff at the 1575 streamgages showed good correspondence for the majority of the CONUS, with a median computed Nash–Sutcliffe efficiency coefficient of 0.76 over all streamgages. These methods maximize the use of available runoff information, resulting in a calibrated CONUS-wide application of the MWBM suitable for providing estimates of water availability at the HRU resolution for both gaged and ungaged areas of the CONUS.

scholarly journals Allowing the Actual Evapotranspiration Uncertainty in Hydrological Models: Coupling of Interval-Based Water Balance and METRIC Models

2022 ◽  
Author(s):  
Maryam Khodadadi ◽  
Tarokh Maleki Roozbahani ◽  
Mercedeh Taheri ◽  
Fatemeh Ganji ◽  
Mohsen Nasseri
Keyword(s):  
Water Balance ◽  
Hydrological Modeling ◽  
Water Balance Model ◽  
Actual Evapotranspiration ◽  
Balance Model ◽  
Classical Type ◽  
Groundwater Levels ◽  
The North ◽  
North Of Iran ◽  
Monthly Water Balance

Abstract Against the paramount role of actual evapotranspiration (ET) in hydrological modeling, determining its values is mixed with different sources of uncertainties. In addition, estimation of ET with energy-based methods (e.g., METRIC) leads to different results with various acceptable initial and boundary conditions (such as land use and cold/hot pixels). The aim of the current research is to allow the uncertainty effects of ET as an interval-based input variable in hydrological modeling. The goal is achieved via feeding the uncertainty of computed ET values to the developed Interval-Based Water Balance (IBWB) model in terms of gray values. To this purpose, the comprehensive monthly water balance model (including surface and groundwater modules) has been revised to a new interval-based form. Moreover, the METRIC model has been used 20 times in each month of computational period to calculate the ET patterns with different hot/cold pixels to provide monthly ensemble ET values. For a comprehensive assessment, the selected water balance model has been calibrated with ensemble means of the computed ET with its classical type. The study area is a mountainous sub-basin of the Sefidrood watershed, Ghorveh-Dehgolan basin, with three alluvial aquifers in the North of Iran. Not only the paradigm shift from determinist to interval-based hydrologic structure improved the statistical metrics of the models’ responses, but also it decreased the uncertainty of the simulated streamflow and groundwater levels.

Sign in / Sign up

Export Citation Format

Share Document