Quantifying downstream impacts of impoundment on flow regime and channel planform, lower Trinity River, Texas

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dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorWellmeyer, Jessica Len_US
dc.contributor.authorSlattery, Michael Cen_US
dc.contributor.authorPhillips, Jonathan Den_US
dc.contributor.otherGeomorphologyen_US
dc.date.accessioned2010-02-15T16:46:06Z
dc.date.available2010-02-15T16:46:06Z
dc.date.issuedJul. 2005en_US
dc.degreeen_US
dc.descriptionpgs. 1-13en_US
dc.description-otheren_US
dc.description.abstractAs human population worldwide has grown, so has interest in harnessing and manipulating the flow of water for the benefit of humans. The Trinity River of eastern Texas is one such watershed greatly impacted by engineering and urbanization. Draining the Dallas-Fort Worth metroplex, just under 30 reservoirs are in operation in the basin, regulating flow while containing public supplies, supporting recreation, and providing flood control. Lake Livingston is the lowest, as well as largest, reservoir in the basin, a mere 95 km above the Trinity's outlet near Galveston Bay. This study seeks to describe and quantify channel activity and flow regime, identifying effects of the 1968 closure of Livingston dam. Using historic daily and peak discharge data from USGS gauging stations, flow duration curves are constructed, identifying pre- and post-dam flow conditions. A digital historic photo archive was also constructed using six sets of aerial photographs spanning from 1938 to 1995, and three measures of channel activity applied using a GIS. Results show no changes in high flow conditions following impoundment, while low flows are elevated. However, the entire post-dam period is characterized by significantly higher rainfall, which may be obscuring the full impact of flow regulation. Channel activity rates do not indicate a more stabilized planform following dam closure; rather they suggest that the Trinity River is adjusting itself to the stress of Livingston dam in a slow, gradual process that may not be apparent in a modern time scale.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeGalveston Bayen_US
dc.history1-15-09 kswen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/18521
dc.latitudeen_US
dc.locationNot available in house - Please contact GBIC for assistanceen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries10045.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectchannelsen_US
dc.subjectcivil engineeringen_US
dc.subjectdam effectsen_US
dc.subjectdamsen_US
dc.subjectenvironmental impacten_US
dc.subjectflooden_US
dc.subjectflowen_US
dc.subjectgeographical information systemsen_US
dc.subjectgeomorphologyen_US
dc.subjecthuman populationen_US
dc.subjecthydrologic dataen_US
dc.subjectimpoundmentsen_US
dc.subjectlake basinsen_US
dc.subjectreservoirsen_US
dc.subjectriversen_US
dc.subjectstressen_US
dc.subjecturbanizationen_US
dc.subjectwatershedsen_US
dc.titleQuantifying downstream impacts of impoundment on flow regime and channel planform, lower Trinity River, Texasen_US
dc.typeArticleen_US
dc.universityen_US
dc.vol-issue69(1-4)en_US

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