Bankfull Regional Curves for the Alleghany Plateau/Valley and Ridge, Piedmont, and Coastal Plain Regions of Maryland

McCandless, Tamara L.; Starr, Richard R.; Harman, William A.

doi:10.1111/1752-1688.12332

Cited by 6 publications

(10 citation statements)

References 19 publications

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“…(1978), referred to as “Britain I,” 56 of the 62 reaches from Hey and Thorne (1986), referred to as “Britain II,” 11 of the 16 reaches from Kellerhals et al. (1972), referred to as “Alberta,” and all 11 reaches from McCandless (2003b), referred to as “Maryland.” In addition, data sets from Foster (2012), Sherwood and Huitger (2005), and Wohl and Wilcox (2005) used for model validation in 3.1.2 are also included. Among these, the data sets from Charlton et al.…”

Section: Resultsmentioning

confidence: 99%

“…Among these, the data sets from Charlton et al (1978) and Kellerhals et al (1972) were part of the baseline data set in the development of the Parker models. Similarly, those from Hey and Thorne (1986) and McCandless (2003b) are part of the baseline data sets used in this study. The remaining four data sets were not used in the development of either our or Parker's models and are referred to as "independent data set" in this Section.…”

Section: Comparison With Parker Et Al Modelsmentioning

confidence: 99%

“…The data on which this article is based are available in Andrews (1984), Brockman (2010), Charlton et al (1978), Chase (2004), Dutnell (2000), Elliott and Cartier (1986), Foster (2012), Hey and Thorne (1986), Horton (2003), Keaton et al (2005), Kellerhals et al (1972), Lawlor (2004), Lotspeich (2009), McCandless (2003a, 2003b, McCandless and Everett (2002), C. Metcalf (2004), C. K. Metcalf et al (2009), Moody et al (2003), Mulvihill et al (2009), Parola et al (2007), Sherwood andHuitger (2005), Southerland (2003), Westergard et al (2005), and Wohl and Wilcox (2005).…”

Section: Appendix A: Expanded Tablesmentioning

confidence: 99%

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Modeling Bankfull Channel Geometry Based on Watershed and Precipitation Characteristics Using Dimensionless Parameters

Bastola

Diplas

2023

Water Resources Research

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Regression models have consistently identified discharge as a suitable variable for capturing the systematic trends in channel geometry. Using a discharge‐based relation, however, does not reflect the more fundamental dependence of channel geometry on basic watershed properties and precipitation characteristics. To explore relations between bankfull channel geometry and watershed properties, we consider two sets of dimensionless regression models: (a) with bankfull discharge as an independent variable, and (b) with bankfull discharge as a dependent variable. While bankfull discharge is used as an input variable in the first set of regression analyses, average annual precipitation has been used in the second set. Other watershed and channel variables considered include drainage area, median sediment grain size, and valley slope. A data set of 538 sandy and gravel channel reaches from UK, and various physiographic provinces of the USA is considered. By representing bankfull discharge, width, depth and watershed variables in the form of dimensionless parameters, we specify the relationship between channel morphology and watershed and precipitation characteristics using an approach that is applicable to sandy and gravel streams from a range of climatic and physiographic regions. The formulation presented here is an effort toward the development of models that will be capable of predicting bankfull channel dimensions and discharge under modified average annual precipitation due to change in climate.

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Section: Resultsmentioning

confidence: 99%

Section: Comparison With Parker Et Al Modelsmentioning

confidence: 99%

Section: Appendix A: Expanded Tablesmentioning

confidence: 99%

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Modeling Bankfull Channel Geometry Based on Watershed and Precipitation Characteristics Using Dimensionless Parameters

Bastola

Diplas

2023

Water Resources Research

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“…There are many methods used in the current practice of stream restoration and channel design; however, the most common methods usually involve a particular reliance on the use of analogs or designs based on a single "dominant" discharge [8][9][10]. The single-design discharge is often assumed to be the discharge that most influences channel form and an adequate proxy for all flows that influence channel form in the flow regime [11].…”

Section: Introductionmentioning

confidence: 99%

Full Spectrum Analytical Channel Design with the Capacity/Supply Ratio (CSR)

Stroth

Bledsoe

Nelson

2017

Water

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Analytical channel design tools have not advanced appreciably in the last decades, and continue to produce designs based upon a single representative discharge that may not lead to overall sediment continuity. It is beneficial for designers to know when a simplified design may be problematic and to efficiently produce alternative designs that approximate sediment balance over the entire flow regime. The Capacity/Supply Ratio (CSR) approach-an extension of the Copeland method of analytical channel design for sand channels-balances the sediment transport capacity of a design reach with the sediment supply of a stable upstream reach over the entire flow duration curve (FDC) rather than just a single discharge. Although CSR has a stronger physical basis than previous analytical channel design approaches, it has not been adopted in practice because it can be a cumbersome and time-consuming iterative analysis without the use of software. We investigate eighteen sand-bed rivers in a comparison of designs based on the CSR approach and five single-discharge metrics: the effective discharge (Q eff) or discharge that transports the most sediment over time; the 1.5-year recurrence interval discharge (Q 1.5); the bankfull discharge (Q bf); and the discharges associated with 50th (Q s50) and 75th (Q s75) percentiles of the cumulative sediment yield curve. To facilitate this analysis, we developed a novel design tool using the Visual Basic for Applications (VBA) programming language in Excel ® to produce stable channel slope/width combinations based on the CSR methodology for both sand-and gravel-bed streams. The CSR Stable Channel Design Tool's (CSR Tool) code structure was based on Copeland's method in SAM and HEC-RAS (Hydrologic Engineering Center's River Analysis System) and was tested with a single discharge to verify outputs. The Q s50 and Q s75 single-discharge designs match the CSR output most closely, followed by the Q bf , Q eff , and Q 1.5. The Q eff proved to be the most inconsistent design metric because it can be highly dependent on the binning procedure used in the effectiveness analysis. Furthermore, we found that the more rigorous physical basis of the CSR analysis is potentially most important in designing "labile" channels with highly erodible substrate, high perennial flow "flashiness", low width-to-depth ratio, and high incoming sediment load. The CSR Tool provides a resource for river restoration practitioners to efficiently utilize design techniques that can promote sediment balance in dynamic fluvial systems.

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“…There are many methods used in the current practice of stream restoration and channel design; however, the most common methods usually involve a particular reliance on the use of analogs or designs based on a single 'dominant' discharge [8][9][10]. This single discharge is often assumed to be the discharge that most influences channel form and an adequate proxy for all flows that influence channel form in the flow regime [11].…”

Section: Introductionmentioning

confidence: 99%

Full Spectrum Analytical Channel Design with the Capacity/Supply Ratio (CSR)

Stroth¹,

Bledsoe²,

Nelson³

2017

Preprint

View full text Add to dashboard Cite

Analytical channel design tools have not advanced appreciably in the last decades, and continue to produce designs based upon a single representative discharge that may not lead to overall sediment continuity. It is beneficial for designers to know when a simplified design may be problematic and to efficiently produce alternative designs that approximate sediment balance over the entire flow regime. The Capacity/Supply Ratio (CSR) approach, an extension of the Copeland method of analytical channel design for sand channels, balances the sediment transport capacity of a design reach with the sediment supply of a stable upstream reach over the entire flow duration curve (FDC) rather than just a single discharge. Although CSR has a stronger physical basis than previous analytical channel design approaches, it has not been adopted in practice because it can be a cumbersome and time-consuming iterative analysis without the use of software. We investigate eighteen sand-bed rivers in a comparison of designs based on the CSR approach and five single-discharge metrics: the effective discharge (Qeff) or discharge that transports the most sediment over time, the 1.5-year recurrence interval discharge (Q1.5), the bankfull discharge (Qbf), and the discharges associated with 50th (Qs50) and 75th (Qs75) percentiles of the cumulative sediment yield curve. To facilitate this analysis we developed a novel design tool using the Visual Basic for Applications (VBA) programming language in Excel ® to produce stable channel slope-width combinations based on the CSR methodology for both sand-and gravel-bed streams. The CSR Stable Channel Design Tool's (CSR Tool) code structure was based on Copeland's method in SAM and HEC-RAS (Hydrologic Engineering Center's River Analysis System) and was tested with a single discharge to verify outputs. The Qs50 and Qs75 single-discharge designs match the CSR output most closely, followed by the Qbf, Qeff, and Q1.5. The Qeff proved to be the most inconsistent design metric because it can be highly dependent on the binning procedure used in the effectiveness analysis. Furthermore, we found that the more rigorous physical basis of the CSR analysis is potentially most important in designing 'labile' channels with highly erodible substrate, high perennial flow 'flashiness,' low width-to-depth ratio, and high incoming sediment load. The CSR Tool provides a resource for river restoration practitioners to efficiently utilize in-depth design techniques that can promote sediment balance in dynamic fluvial systems.

show abstract

Bankfull Regional Curves for the Alleghany Plateau/Valley and Ridge, Piedmont, and Coastal Plain Regions of Maryland

Cited by 6 publications

References 19 publications

Modeling Bankfull Channel Geometry Based on Watershed and Precipitation Characteristics Using Dimensionless Parameters

Modeling Bankfull Channel Geometry Based on Watershed and Precipitation Characteristics Using Dimensionless Parameters

Full Spectrum Analytical Channel Design with the Capacity/Supply Ratio (CSR)

Full Spectrum Analytical Channel Design with the Capacity/Supply Ratio (CSR)

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