Abrasion Prediction at Kayraktepe Sediment Bypass Tunnel in Turkey

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dc.contributor.advisorWang, Keh-Han
dc.contributor.committeeMemberVipulanandan, Cumaraswamy
dc.contributor.committeeMemberQian, Qin
dc.creatorYesil Ozden, Ayse
dc.date.accessioned2019-09-10T15:13:31Z
dc.date.createdDecember 2018
dc.date.issued2018-12
dc.date.submittedDecember 2018
dc.date.updated2019-09-10T15:13:31Z
dc.description.abstractSediment accumulation in reservoirs is a challenging issue that concerns most of the reservoirs worldwide. Use of sediment bypass tunnels is one of the potential solutions to reduce sediments deposited in reservoirs. However, the sediment bypass tunnels could face major invert abrasion problems due to intense bedload sediment transportation. Three existing abrasion prediction models are introduced developed respectively by Ishibashi (1983), Sklar and Dietrich (2004), and Auel et al. (2015). Those models are applied to estimate the abrasion of the Kayraktepe sediment bypass tunnels in Turkey. The Ishibashi (1983) model results reveal some discrepancies when compared to laboratory data, which reflects that its grinding stress term gives much higher values than its particle impact term does. However, when examining the effect of particle impact term by neglecting the grinding stress, the model predicts consistent results. The model by Auel at al. (2015) demonstrates reasonable predictions in case of regulated abrasion coefficient values are used. The model of Sklar and Dietrich (2004) predicts the lowest abrasion value due to its development according to the subcritical flow conditions. In Kayraktepe dam, the flow condition in sediment bypass tunnels are supercritical flow, thus the Sklar and Dietrich (2004) model does not fit for abrasion estimation. Modifications are made to the Sklar and Dietrich (2004) model are the revised model shows great improvement on the abrasion prediction. It is concluded that the estimation of sediment transport rate using commonly adapted theoretical or empirical formulations tends to be predicted more than the real transport rate and results in the over-estimation of the abrasion rate. It is recommended to modify the formulations and equation coefficients with the inputs of the field data on laboratory measurements for bettering the abrasion prediction.
dc.description.departmentCivil and Environmental Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/4414
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectAbrasion Prediction
dc.titleAbrasion Prediction at Kayraktepe Sediment Bypass Tunnel in Turkey
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2020-12-01
local.embargo.terms2020-12-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentCivil and Environmental Engineering, Department of
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Civil Engineering

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