Increasing HSPF Model Performance by Improving FTABLEs: Case Studies on the Illinois River Basin

Lian, Yanqing; Demissie, Misganaw; Chan, I-Chi

doi:10.1061/40792(173)479

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…For a river system as complicated as the Illinois River, FTABLEs cannot fully reflect the hydraulic impacts to the flow routing due to backwater lakes, levees, bridges, and locks and dams. This has been shown in a previous study (Lian et al, 2005) that the HSPF modeling accuracy for the Illinois River Basin can only be moderately improved by using modified FTABLEs created from natural channel geometry data.…”

Section: Introductionmentioning

confidence: 84%

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Lian

Chan

Singh

et al. 2007

Journal of Hydrology

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Section: Introductionmentioning

confidence: 84%

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Lian

Chan

Singh

et al. 2007

Journal of Hydrology

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“…More research is needed using watersheds larger and smaller than the Pigg River watershed to test the conclusions presented here. We are aware of one other study that has examined the impact of alternative approaches to generating FTABLES (Lian et al, 2005). The results of that study suggested that in the approximately 75,000 sq km Illinois River basin, the accuracy of HPSF when predicting average daily flow rates can be "moderately" improved using FTABLEs created from natural channel geometry data.…”

Section: Discussionmentioning

confidence: 99%

Comparison of HSPF Outputs Using Ftables Generated With Field Survey and Digital Data

Staley¹,

Bright²,

Zeckoski³

et al. 2006

J Am Water Resources Assoc

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The Hydrological Simulation Program-FORTRAN (HSPF) describes discharge from a stream reach based on function tables (FTABLES) that relate stream stage, surface area, volume, and discharge. For this study, five FTABLE scenarios were compared to assess their effect on daily discharge rates predicted using HSPF. Four "field-based" FTABLE scenarios were developed using detailed cross section surveys collected at predefined intervals along 14 reaches in the study watershed. A fifth "digital-based" scenario was developed using digital elevation models (DEMs) and Natural Resource Conservation Service (NRCS) Regional Hydraulic Geometry Curves. The Smirnov k-sample test was used to compare average daily discharge rates simulated with HSPF using the five FTABLE scenarios. No significant difference in simulated stream discharge was found (p = 0.99) between the five FTABLE scenarios. Additional examination of the four field-based scenarios revealed that the number of cross sections per stream reach used to generate FTABLES had little effect on the resulting stage discharge relationship. These findings suggest that FTA-BLES generated using digital data are a viable option when simulating stream discharge with HSPF and that if field data are used to generate FTABLES, using fewer cross sections will not adversely affect simulated discharge predictions. (KEY TERMS: simulation; watershed hydrology; stream discharge; HSPF.)

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“…Many previous HSPF modeling studies focused on specific hydrological and water quality modeling applications, and offered only limited recommendations for model enhancement. Recently, there have been efforts to evaluate HSPF’s channel hydraulic representation with the goal of improving its overall simulation performance (Lian et al. , 2005; Staley et al.…”

Section: Discussionmentioning

confidence: 99%

“…(2006) developed a prototype HSPF interface data model (IDM) that exports FTABLE from the HECRAS model to generate an FTABLE for the HSPF model. Lian et al. (2005) suggested that HSPF modeling accuracy can be improved with minimal additional data on channel geometry and flow relationships.…”

Section: Discussionmentioning

confidence: 99%

“…This compound channel representation approximates natural channel and floodplain shapes, which makes the model more flexible, and therefore applicable to watersheds with no surveyed channel cross‐section data. In recent years, there have been efforts to enhance the model’s hydraulic representation by improving the accuracy of its hydraulic function table (FTABLE) (Lian et al. , 2005; Staley et al.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Hyrdological Simulation Program – FORTRAN Model Channel Hydraulic Representation¹

Mohamoud

2007

J American Water Resour Assoc

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The hydrological simulation program -FORTRAN (HSPF) is a comprehensive watershed model that employs depth-area-volume-flow relationships known as the hydraulic function table (FTABLE) to represent the hydraulic characteristics of stream channel cross-sections and reservoirs. An accurate FTABLE determination for a stream cross-section site requires an accurate determination of mean flow depth, mean flow width, roughness coefficient, longitudinal bed slope, and length of stream reach. A method that uses regional regression equations to estimate mean flow depth, mean flow width, and roughness coefficient is presented herein. FTABLES generated by the proposed method (Alternative Method) and FTABLES generated by Better Assessment Science Integrating Point and Nonpoint Sources (BASINS) were compared. As a result, the Alternative Method was judged to be an enhancement over the BASINS method. First, the Alternative Method employs a spatially variable roughness coefficient, whereas BASINS employs an arbitrarily selected spatially uniform roughness coefficient. Second, the Alternative Method uses mean flow width and mean flow depth estimated from regional regression equations whereas BASINS uses mean flow width and depth extracted from the National Hydrography Dataset (NHD). Third, the Alternative Method offers an option to use separate roughness coefficients for the in-channel and floodplain sections of compound channels. Fourth, the Alternative Method has higher resolution in the sense that area, volume, and flow data are calculated at smaller depth intervals than the BASINS method. To test whether the Alternative Method enhances channel hydraulic representation over the BASINS method, comparisons of observed and simulated streamflow, flow velocity, and suspended sediment were made for four test watersheds. These comparisons revealed that the method used to estimate the FTABLE has little influence on hydrologic calibration, but greatly influences hydraulic and suspended sediment calibration. The hydrologic calibration results showed that observed versus simulated daily streamflow comparisons had Nash-Sutcliffe efficiencies ranging from 0.50 to 0.61 and monthly comparisons had efficiencies ranging from 0.61 to 0.84. Comparisons of observed and simulated suspended sediments concentrations had model efficiencies ranging from 0.48 to 0.56 for the daily, and 0.28 to 0.70 for the monthly comparisons. The overall results of the hydrological, hydraulic, and suspended sediment concentration comparisons show that the Alternative Method yielded a relatively more accurate FTABLE than the BASINS method. This study concludes that hydraulic calibration enhances suspended sediment simulation performance, but even greater improvement in suspended sediment calibration can be achieved when hydrological simulation performance is improved. Any improvements in hydrological simulation performance are subject to improvements in the temporal and spatial representation of the precipitation data.(KEY TERMS: channel hydraulic representation; hydrau...

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Increasing HSPF Model Performance by Improving FTABLEs: Case Studies on the Illinois River Basin

Cited by 6 publications

References 2 publications

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Comparison of HSPF Outputs Using Ftables Generated With Field Survey and Digital Data

Enhancing Hyrdological Simulation Program – FORTRAN Model Channel Hydraulic Representation¹

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Increasing HSPF Model Performance by Improving FTABLEs: Case Studies on the Illinois River Basin

Cited by 6 publications

References 2 publications

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Coupling of hydrologic and hydraulic models for the Illinois River Basin

Comparison of HSPF Outputs Using Ftables Generated With Field Survey and Digital Data

Enhancing Hyrdological Simulation Program – FORTRAN Model Channel Hydraulic Representation1

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Enhancing Hyrdological Simulation Program – FORTRAN Model Channel Hydraulic Representation¹