Parsimonious Mathematical Characterization of Channel Shape and SizeSource: Journal of Hydrologic Engineering:;2017:;Volume ( 022 ):;issue: 012Author:Glenn E. Moglen
DOI: 10.1061/(ASCE)HE.1943-5584.0001588Publisher: American Society of Civil Engineers
Abstract: This work has two purposes: (1) starting from the classic hydraulic geometry formulation, present a mathematically parsimonious, two-parameter, characterization of channel shape and size; and (2) analytically quantify cross-sectional area, top width, average depth, critical energy, and bank-full discharge at critical conditions as a function of these two parameters. The matter of channel asymmetry is examined, and a metric for quantifying asymmetry is presented. The robustness of this characterization is demonstrated in an application to several observed channels in Maryland and Delaware across three physiographic regions: Allegheny plateau, Piedmont, and coastal plain. Values of the shape parameter, u, ranged from 1.6 to 4.3, and asymmetry measures ranged from 0.09 to 0.51 for the demonstration cross sections. The channel characterization and set of channel property relationships have value for both analysis and design applications related to stream restoration, in which the consistency of a designed channel with existing field conditions is imperative for channel stability.
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contributor author | Glenn E. Moglen | |
date accessioned | 2017-12-30T12:56:11Z | |
date available | 2017-12-30T12:56:11Z | |
date issued | 2017 | |
identifier other | %28ASCE%29HE.1943-5584.0001588.pdf | |
identifier uri | http://138.201.223.254:8080/yetl1/handle/yetl/4243610 | |
description abstract | This work has two purposes: (1) starting from the classic hydraulic geometry formulation, present a mathematically parsimonious, two-parameter, characterization of channel shape and size; and (2) analytically quantify cross-sectional area, top width, average depth, critical energy, and bank-full discharge at critical conditions as a function of these two parameters. The matter of channel asymmetry is examined, and a metric for quantifying asymmetry is presented. The robustness of this characterization is demonstrated in an application to several observed channels in Maryland and Delaware across three physiographic regions: Allegheny plateau, Piedmont, and coastal plain. Values of the shape parameter, u, ranged from 1.6 to 4.3, and asymmetry measures ranged from 0.09 to 0.51 for the demonstration cross sections. The channel characterization and set of channel property relationships have value for both analysis and design applications related to stream restoration, in which the consistency of a designed channel with existing field conditions is imperative for channel stability. | |
publisher | American Society of Civil Engineers | |
title | Parsimonious Mathematical Characterization of Channel Shape and Size | |
type | Journal Paper | |
journal volume | 22 | |
journal issue | 12 | |
journal title | Journal of Hydrologic Engineering | |
identifier doi | 10.1061/(ASCE)HE.1943-5584.0001588 | |
page | 06017006 | |
tree | Journal of Hydrologic Engineering:;2017:;Volume ( 022 ):;issue: 012 | |
contenttype | Fulltext |