Persistent Link:
http://hdl.handle.net/10150/191986
Title:
Overland flow partitioning for rill and interrill erosion modeling
Author:
Page, Donna Ingram,1956-
Issue Date:
1988
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:
Accurate estimation of the shear stress of flowing water is important in modeling rill and interrill erosion. The shear stress of flow in rills helps determine detachment capacity and transport capacity of flow. This study investigated shear stress estimation in erosion modeling. Rill shear stress estimates based on sheet flow and on flow partitioned into rill and interrill areas for a uniform slope were compared. It was found that the sheet flow assumption underestimated actual shear stress in rills. Estimates of rill spacing and rill width affect shear stress in rills. It was found that increasing the distance between rills could increase predicted sediment loads while sediment loads reached a maximum then decreased for increased rill widths. Erodibililty parameters for an erosion model were found using optimization. Optimal values for rill erodibility parameters were found to be distorted when based on a model that estimated shear stress from sheet flow.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Soil erosion -- Mathematical models.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Renewable Natural Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Lane, Leonard J.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleOverland flow partitioning for rill and interrill erosion modelingen_US
dc.creatorPage, Donna Ingram,1956-en_US
dc.contributor.authorPage, Donna Ingram,1956-en_US
dc.date.issued1988en_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.abstractAccurate estimation of the shear stress of flowing water is important in modeling rill and interrill erosion. The shear stress of flow in rills helps determine detachment capacity and transport capacity of flow. This study investigated shear stress estimation in erosion modeling. Rill shear stress estimates based on sheet flow and on flow partitioned into rill and interrill areas for a uniform slope were compared. It was found that the sheet flow assumption underestimated actual shear stress in rills. Estimates of rill spacing and rill width affect shear stress in rills. It was found that increasing the distance between rills could increase predicted sediment loads while sediment loads reached a maximum then decreased for increased rill widths. Erodibililty parameters for an erosion model were found using optimization. Optimal values for rill erodibility parameters were found to be distorted when based on a model that estimated shear stress from sheet flow.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshSoil erosion -- Mathematical models.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineRenewable Natural Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairLane, Leonard J.en_US
dc.contributor.committeememberFogel, Martin M.en_US
dc.contributor.committeememberHawkins, Richard H.en_US
dc.identifier.oclc212627480en_US
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