Evaluation of transmission losses in ephemeral streams with compound channels.

Persistent Link:
http://hdl.handle.net/10150/186484
Title:
Evaluation of transmission losses in ephemeral streams with compound channels.
Author:
El-Shinnawy, Ibrahim Abdelmagid.
Issue Date:
1993
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The problem of analyzing and estimating transmission losses in ephemeral streams with compound channels was the focus of this research. The Kinematic Runoff and Erosion model KINEROS (Woolhiser et al., 1990) and the Soil Conservation Service SCS model (Lane, 1983) were employed in this study as they represent a range in model complexity. Initial soil moisture and channel wetness conditions were employed to modify channel infiltration capacity in the SCS model and the saturated hydraulic conductivity in KINEROS. Numerically both models have been improved to treat compound channel routing with differential over-bank and main channel infiltration. The KINEROS model was extended by coupling the over-bank and channel one-dimensional kinematic and infiltration equations through the lateral inflow terms with an assumed horizontal water surface. The SCS was extended to incorporate the Manning's equation for flow with the ordinary differential equation employed in the model. Results demonstrate that simulations by multiple trapezoidal and multiple compound cross sections further decrease computed outflow volumes and increase transmission losses as compared to using a single average trapezoidal cross section. Both models simulated observed channel losses with a comparable degree of accuracy for eight carefully checked runoff events. Over-bank losses represented 12.5% of the mean main channel loss in the case of KINEROS model and 13.4% in the SCS model. The evaluation of the performance of both models demonstrated that the best results were obtained by introducing the channel bed capacity term in the analysis to more fully treat pre-runoff channel moisture conditions.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Hydrology.; Mechanical engineering.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Civil Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Contractor, Dinshaw N.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleEvaluation of transmission losses in ephemeral streams with compound channels.en_US
dc.creatorEl-Shinnawy, Ibrahim Abdelmagid.en_US
dc.contributor.authorEl-Shinnawy, Ibrahim Abdelmagid.en_US
dc.date.issued1993en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe problem of analyzing and estimating transmission losses in ephemeral streams with compound channels was the focus of this research. The Kinematic Runoff and Erosion model KINEROS (Woolhiser et al., 1990) and the Soil Conservation Service SCS model (Lane, 1983) were employed in this study as they represent a range in model complexity. Initial soil moisture and channel wetness conditions were employed to modify channel infiltration capacity in the SCS model and the saturated hydraulic conductivity in KINEROS. Numerically both models have been improved to treat compound channel routing with differential over-bank and main channel infiltration. The KINEROS model was extended by coupling the over-bank and channel one-dimensional kinematic and infiltration equations through the lateral inflow terms with an assumed horizontal water surface. The SCS was extended to incorporate the Manning's equation for flow with the ordinary differential equation employed in the model. Results demonstrate that simulations by multiple trapezoidal and multiple compound cross sections further decrease computed outflow volumes and increase transmission losses as compared to using a single average trapezoidal cross section. Both models simulated observed channel losses with a comparable degree of accuracy for eight carefully checked runoff events. Over-bank losses represented 12.5% of the mean main channel loss in the case of KINEROS model and 13.4% in the SCS model. The evaluation of the performance of both models demonstrated that the best results were obtained by introducing the channel bed capacity term in the analysis to more fully treat pre-runoff channel moisture conditions.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectHydrology.en_US
dc.subjectMechanical engineering.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairContractor, Dinshaw N.en_US
dc.contributor.committeememberLansey, Kevin E.en_US
dc.contributor.committeememberLane, Leonarden_US
dc.contributor.committeememberGoodrich, David C.en_US
dc.contributor.committeememberFogel, Martinen_US
dc.identifier.proquest9410683en_US
dc.identifier.oclc701553403en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.