Effects of sediment transport on 1-D and 2-D hydrodynamic modeling and flood inundation

Download

index.pdf

Date

2018

Author

Önder, Görkem

Metadata

Show full item record

Item Usage Stats

238
views

126
downloads

In this study, effects of river bed changes on flood inundation are analysed with 1D and 2D coupled hydrodynamic and sediment transport modeling. In order to select the best set of methods depending on qualitative and quantitative indicators, sensitivity of the variables affecting sediment transport processes are presented. Methodology that includes sensitivity analyses of sediment transport processes and real event analyses is implemented for Terme River. Sensitivity analyses are done with 1D modeling by using MIKE 11 HD and MIKE 11 ST software. In these analyses hydrographs having different return periods are used. Effects of sediment transport on flooding are considered with 2D modeling by using MIKE 21 HD and MIKE 21 ST software. Engelund-Fredsoe method with suitable bed level update method is determined as the best method for the study area. Morphological changes and the effect of morphology on hydrodynamics are presented with three real flood events by using 1D modeling. 2D hydrodynamic and sediment transport models are implemented for real flood event occurred in 2014 to examine the effects of morphological changes and grain size diameter on flood inundation. Results of the study show that sediment transport thus morphological changes affect hydrodynamics and flood inundation. In addition, bed level update method and grain size diameter dramatically affect hydrodynamics and flood occurrence. Flood inundation area obtained from coupled modeling decreases compared to pure hydrodynamic modeling for the study area. Analyses show that 2D models give more precise results for bed level changes and sediment transport processes than 1D models but they still demand too much computation time.

Subject Keywords

Hydrodynamics., Sedimentology., Floods.

URI

http://etd.lib.metu.edu.tr/upload/12622189/index.pdf
https://hdl.handle.net/11511/27355

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Effect of Foundation Soil Stiffness on the Seismic Performance of Integral Bridges Dicleli, Murat (Informa UK Limited, 2011-05-01) In this study, the effect of foundation soil stiffness on the seismic performance of integral bridges (IBs) is investigated. For this purpose, nonlinear structural models of a two-span TB with four different foundation soil stiffness types (loose, medium, medium-dense and dense sands) are built. In the nonlinear structural models, nonlinear soil structure interaction including free-field effects is considered. Then, the nonlinear time history analyses of the TB models are conducted using a set of ground mot...
Effect of watershed partitioning on hydrologic parameters and estimation of hydrograph of an ungauged basin: a case study in Gokirmak and Kocanaz, Turkey Kocyigit, Musteyde Baduna; Akay, Huseyin; Yanmaz, Ali Melih (Springer Science and Business Media LLC, 2017-08-01) The main goal of this study is to investigate the effect of the size of the subbasins of a watershed on the hydrologic parameters and their spatial variability in an estimation of the hydrologic parameters and hydrograph of a neighbouring ungauged basin. In this paper, Hydrologic Engineering Center-Hydrologic Modelling System (HEC-HMS), a semi-distributed hydrologic model, is used to calibrate and cross-validate two flood events occurred in 1998 and then validate four other flood events occurred in 1991, 19...
Effects of Soil Bridge Interaction and Abutment Deck Continuity on the Live Load Distribution Factors in Integral Bridge Components Erhan, Semih; Dicleli, Murat (2009-10-01) In this study, the effects of soil bridge interaction and abutment deck continuity on the live load distribution in integral bridge components are studied. For this purpose, 2-D and 3-D structural models of typical integral and conventional bridges having various structural, geometric and geotechnical properties are built. The analyses of the models are then conducted under AASHTO live load. The analyses results revealed that soil-bridge interaction has significant effects on the live load distribution in a...
Effects of harbour shape on the induced sedimentation Kian, Rozita; Velioglu, Deniz; Yalçıner, Ahmet Cevdet; Pelinovsky, Efim; Kurkin, Andrey; Zaytsev, Andrey; Yalciner, Bora; Pamuk, Aykut (2017-01-01) Tsunamis in shallow water zones lead to sea water level rise and fall, strong currents, forces (drag, impact, uplift, etc.), morphological changes (erosion, deposition), dynamic water pressure, as well as resonant oscillations. As a result, ground materials under the tsunami motion move and scour/erosion/deposition patterns can be observed in the region. Ports and harbours as enclosed basins are the main examples of coastal structures that usually encounter natural hazards with small or huge damaging scales...
Effects of Harbor Shape on the Induced Sedimentation; L-Type Basin Kian, Rozita; Velioglu, Deniz; Yalçıner, Ahmet Cevdet; Zaytsev, Andrey (2016-09-01) Tsunamis in shallow water zones lead to sea water level rise and fall, strong currents, forces (drag, impact, uplift, etc.), morphological changes (erosion, deposition), dynamic water pressure, as well as resonant oscillations. As a result, ground materials under the tsunami motion move, and scour/erosion/deposition patterns can be observed in the region. Ports and harbors as enclosed basins are the main examples of coastal structures that usually encounter natural hazards with small or huge damaging scales...

Citation Formats

G. Önder, “Effects of sediment transport on 1-D and 2-D hydrodynamic modeling and flood inundation,” M.S. - Master of Science, Middle East Technical University, 2018.