Numerical solution to kinematic wave equation for surface runoff analysis using satellite based DEM data

Download

12625724.pdf

Date

2020-9

Author

Yıldırım, Hasan Hüseyin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

362
views

434
downloads

Modeling of rainfall runoff over large catchment areas is a critical step in flood analysis to estimate the time-wise variation of discharge at the outlet of hydrological basin. Outlet hydrograph of a basin is generally estimated using empirical formulations based on measurements from previous rainfall events. However, these empirical methods may not correctly model the surface flow dynamics over large and complex geometries. In this study, a fully distributed numerical model is developed that can deal with various flow conditions in natural domains. A structured computational grid is constructed on a Digital Elevation Model (DEM) that is derived from satellite data using appropriate transformations. The numerical algorithm switches between central and up-wind differencing to accurately simulate surface flow, accumulation around barriers and ponding inside cavities. Some numerical anomalies in regions of large bed slope were detected and cure is obtained in the code development stage. The code is optimized for parallel processing in multi-core computers which gives much faster solutions for large domains. Tests on hypothetical and natural domains are performed to validate the developed code.

Subject Keywords

CFD, Kinematic Wave, Rainfall-Runoff, Satellite Based Data

URI

https://hdl.handle.net/11511/69296

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Adaptation measures for seawalls to withstand sea-level rise Kisacik, Dogan; Özyurt Tarakcıoğlu, Gülizar; Cappietti, Lorenzo (2022-04-15) © 2022 Elsevier LtdSea level rise necessitates adaptation measures for coastal protection structures like seawalls as changes in the design conditions will generate higher wave overtopping discharges and coastal flooding. Although increasing crest height is a common measure, the recreational function of urban seawalls limits the applicability. In this paper, performance on overtopping control of crest modifications such as storm walls, parapets, promenade, and stilling wave basin (SWB), are studied for simp...
Evaluating the one way coupling of WRF Hydro for flood forecasting Yücel, İsmail; Yılmaz, Koray Kamil (null; 2016-04-18) A fully-distributed, multi-physics, multi-scale hydrologic and hydraulic modeling system, WRF-Hydro, is used to assess the potential for skillful flood forecasting based on precipitation inputs derived from the Weather Research and Forecasting (WRF) model and the EUMETSAT Multi-sensor Precipitation Estimates (MPEs). Similar to past studies it was found that WRF model precipitation forecast errors related to model initial conditions are reduced when the three dimensional atmospheric data assimilation (3DVAR)...
Application of the bentix index in assessing ecological quality of hard substrata: a case study from the Bosphorus Strait, Turkey KALKAN, E.; KARHAN, S.U.; MUTLU, E.; SIMBOURA, N.; BEKOLET, M. (National Documentation Centre (EKT), 2007-6-1) In this paper, a biotic index (Bentix) has been used for the assessment of ecological quality status of shallow water hard substrate benthic ecosystems affected by coastal sewage discharges in the Bosphorus Strait. A significant difference was observed between the control and the discharge stations with regard to Bentix values (Mann-Whitney U Test, p=0.002) and ecological quality status of the discharge stations was worse than that of controls. The index values revealed that sewage discharges caused ser...
Evaluating the use of bias-corrected radar rainfall data in three flood events in Samsun, Turkey Ozkaya, Arzu; Akyürek, Sevda Zuhal (Springer Science and Business Media LLC, 2019-09-01) In applied hydrology, estimating the peak flood discharge in ungauged or poorly gauged river sections is vital for urbanized areas. Spatially distributed rainfall data such as weather radar data may be a good choice to represent the driving force in hydrologic models for ungauged regions. However, it is important to examine the accuracy of this product, especially over mountainous regions. The bias between radar rainfall and rain gauge rainfall can be progressively removed by using information provided by r...
Trend Analyses of Meteorological Variables and Lake Levels for Two Shallow Lakes in Central Turkey YAĞBASAN, ÖZLEM; Demir, Vandettin; Yazıcıgil, Hasan (2020-02-01) Trend analyses of meteorological variables play an important role in assessing the long-term changes in water levels for sustainable management of shallow lakes that are extremely vulnerable to climatic variations. Lake Mogan and Lake Eymir are shallow lakes offering aesthetic, recreational, and ecological resources. Trend analyses of monthly water levels and meteorological variables affecting lake levels were done by the Mann-Kendall (MK), Modified Mann-Kendall (MMK), Sen Trend (ST), and Linear trend (LT) ...

Citation Formats

H. H. Yıldırım, “Numerical solution to kinematic wave equation for surface runoff analysis using satellite based DEM data,” M.S. - Master of Science, Middle East Technical University, 2020.