Hydraulic Modeling of Floods in an Open Conduit Cave

Hydraulic Modeling of Floods in an Open Conduit Cave

Bibliographic Details
Main Author: Albright, Lydia T.
Language:English
Published: Ohio University / OhioLINK 2020
Subjects:
Geological
Geology
Hydraulic Model
Roughness
Discharge
Stream Model
Cave
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596647829960682
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou15966478299606822021-08-03T07:16:12Z Hydraulic Modeling of Floods in an Open Conduit Cave Albright, Lydia T. Geological Geology Hydraulic Model Roughness Discharge Stream Model Cave Discharge and water surface profiles were continuously monitored to determine major sources of energy loss in a narrow bedrock stream. Instrumental data was collected and used to create a hydraulic model of an open conduit, high gradient, narrow, slot canyon-like cave. Data was collected by conducting a cave survey, monitoring stream depths using pressure transducers, and creating a stage-discharge relationship using two methods: A electromagnetic flowmeter and the salt dilution method. The stage-discharge relationship used to model stream flow was a result of measuring discharge at multiple stages. Five pressure transducers were deployed opportunistically along a 94-meter-long reach in Fuller's Cave, Greenbrier County, West Virginia and a sixth probe was placed in a karst window 100 meters upstream. Probe pressures were corrected for atmospheric pressure changes that affected submerged probes. The cave is highly susceptible to flooding due to its geometry and adequate rainfall. When water flows in an open channel, energy is lost through friction along the banks and bed of the channel and through turbulence. The data collected during this study yielded empirical roughness values, head losses, and energy gradients that were obtained from a constrained model to create an accurate representation of flooding in the open channel cave. Major energy losses were observed where channel geometry changed significantly, breakdown occluded the passage, and where the passage cross section was non-uniform.Such hydraulic modeling can be used to better visualize floods and simulate flow in similar environments. This allows for better study of sediment transport, shear forces, and factors that affect flow in open conduit caves. This study's findings confirmed and expanded the use of scallop and sediment measurements, discharge curves, and pressure transducers to create a hydraulic model but more work is needed to perfect the use of these variables when studying energy loss. 2020-09-16 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596647829960682 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596647829960682 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geological
Geology
Hydraulic Model
Roughness
Discharge
Stream Model
Cave
spellingShingle Geological
Geology
Hydraulic Model
Roughness
Discharge
Stream Model
Cave
Albright, Lydia T.
Hydraulic Modeling of Floods in an Open Conduit Cave
author Albright, Lydia T.
author_facet Albright, Lydia T.
author_sort Albright, Lydia T.
title Hydraulic Modeling of Floods in an Open Conduit Cave
title_short Hydraulic Modeling of Floods in an Open Conduit Cave
title_full Hydraulic Modeling of Floods in an Open Conduit Cave
title_fullStr Hydraulic Modeling of Floods in an Open Conduit Cave
title_full_unstemmed Hydraulic Modeling of Floods in an Open Conduit Cave
title_sort hydraulic modeling of floods in an open conduit cave
publisher Ohio University / OhioLINK
publishDate 2020
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1596647829960682
work_keys_str_mv AT albrightlydiat hydraulicmodelingoffloodsinanopenconduitcave
_version_ 1719458042076987392

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