Monitoring of responses to a local base-level change in an ephemeral stream

Persistent Link:
http://hdl.handle.net/10150/191709
Title:
Monitoring of responses to a local base-level change in an ephemeral stream
Author:
Kaehler, C. A.
Issue Date:
1980
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:
A long-term program has been established in the Tucson Mountains to monitor changes caused by removal of a small dam whose reservoir was filled with sediment, and to describe the characteristics of the associated fluvial system. For this ephemeral stream, data are collected using cross-channel profiles, scour chains, longitudinal profiles, plane-table mapping, painted rocks, crest-stage gages, and measurement of sediment-size distribution. The drainage basin, described using topographic maps, has an area of 3.78 km², and length of 3910 m, a total relief of 547 m, an elongation ratio of 0.56, and a drainage density of 10.4 km/km². Three small post base-level drop flow events resulted in net deposition (with widely interspersed short reaches of net erosion) and increases in width-depth ratio downstream from the base-level fall, and formation of a gully and headcuts, local steepening of the stream gradient by 145%, and a decrease in the width-depth ratio by roughly 80% upstream from the base-level fall. The morphologic changes at intervals along the length of the streambed in response to the 2.5 in high base-level fall. The data appear to indicate a greater change in gradient than in width-depth ratio during initial response to the base-level fall.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Ephemeral streams.; Stream channelization.; Stream measurements.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Geosciences; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Bull, William B.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleMonitoring of responses to a local base-level change in an ephemeral streamen_US
dc.creatorKaehler, C. A.en_US
dc.contributor.authorKaehler, C. A.en_US
dc.date.issued1980en_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.abstractA long-term program has been established in the Tucson Mountains to monitor changes caused by removal of a small dam whose reservoir was filled with sediment, and to describe the characteristics of the associated fluvial system. For this ephemeral stream, data are collected using cross-channel profiles, scour chains, longitudinal profiles, plane-table mapping, painted rocks, crest-stage gages, and measurement of sediment-size distribution. The drainage basin, described using topographic maps, has an area of 3.78 km², and length of 3910 m, a total relief of 547 m, an elongation ratio of 0.56, and a drainage density of 10.4 km/km². Three small post base-level drop flow events resulted in net deposition (with widely interspersed short reaches of net erosion) and increases in width-depth ratio downstream from the base-level fall, and formation of a gully and headcuts, local steepening of the stream gradient by 145%, and a decrease in the width-depth ratio by roughly 80% upstream from the base-level fall. The morphologic changes at intervals along the length of the streambed in response to the 2.5 in high base-level fall. The data appear to indicate a greater change in gradient than in width-depth ratio during initial response to the base-level fall.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshEphemeral streams.en_US
dc.subject.lcshStream channelization.en_US
dc.subject.lcshStream measurements.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGeosciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairBull, William B.en_US
dc.identifier.oclc212908793en_US
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