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CONTENTS Page
Title page i
Declaration ii
Certificate of Approval & Certificate by the Supervisors iii-iv
Acknowledgement v
List of Symbols vi
Abstract ix
Contents x
Chapter 1 Introduction 1
1.1 Objectives of the Study 5
1.2 Scope of the Study 5
1.3 Organization of the Thesis 6
Chapter 2 Review of Literature 8
2.1 Flood Control Measures 8 2.2 Hydrodynamic Modelling of Flood 11
2.2.1 River hydrodynamic models 12
2.2.2 Model calibration, validation and uncertainty analysis
12 2.2.3 MIKE 11HD and MIKE FLOOD models 14 2.2.4 Hydrodynamic modelling under limited data
availability
15 2.3 Flood Hazard and Risk Modelling 17
2.3.1 Flood vulnerability 17
2.3.2 Flood risk 19
2.4 Flood Frequency Analysis 20
2.5 Modelling the Shape of Flood Hydrographs 22 2.6 Critiques to the Literature Reviewed 24
Chapter 3 Study Area 26
3.1 General Descriptions 26
3.2 Topography and Regional Information 27
3.2.1 Elevation 27
3.2.2 Climate and rainfall 28
3.2.3 Land use 28
3.3 Flood problems in the Brahmani delta 29
3.3.1 Flood protection 30
Chapter 4 Data and Methodology 33
4.1 Data 33
4.1.1 Hydrological data 35
4.1.2 River geometry data 35
4.1.3 Spot heights, contour map and DEM 36 4.2 Theoretical Considerations and Methodology 37
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4.2.1 SRTM DEM and cross-section extractions 384.2.1.1 Cross-section extractions 39
4.2.1.2 Hydraulic parameter analysis 40 4.2.2 Development of design flood hydrographs 41 4.2.2.1 Probability density functions 42
4.2.2.2 Base flow separation 45
4.2.2.3 Dimensionless hydrographs and PDF fitting 46 4.2.2.4 Frequency analysis and development of
design flood hydrographs
48 4.2.2.5 Error and sensitivity analysis of the PDF
parameters
49 4.2.3 MIKE 11 Hydrodynamic Model (MIKE 11HD) 50 4.2.3.1 Dynamic channel flow equations 50 4.2.3.2 Solution schemes for the equations 51 4.2.3.3 Abbott and Ionescu scheme 52 4.2.3.4 MIKE 11HD model stability 56
4.2.3.5 Courant criterion 57
4.2.3.6 Velocity criterion 57
4.2.4 MIKE 11HD model setup 58
4.2.4.1 River network 58
4.2.4.2 Insertion of cross-sections 59
4.2.4.3 Boundary conditions 60
4.2.4.4 Hydrodynamic and simulation parameter setting
61 . 4.2.5 MIKE 11HD model calibrations 62
4.2.6 MIKE 21 HD model 63
4.2.6.1 2D flow equations 64
4.2.6.2 MIKE 21HD input parameters 65
4.2.7 MIKE FLOOD model setup 67
4.2.7.1 Overview of MIKE FLOOD and dynamic links
67 4.2.7.2 MIKE FLOOD model in the present study 70 4.2.8 Flood hazard modelling and risk zoning 72 4.2.8.1 Flood vulnerability analysis 73
4.2.8.2 Flood risk zoning 74
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Chapter 5 Results and Discussion 77
5.1 Hydrodynamic Modelling using DEM-Extracted Cross- Sections
77
5.1.1 DEM error analysis 78
5.1.2 Modification of DEM-extracted cross-sections 81 5.1.3 Analysis of cross-section hydraulic parameters 83 5.2 Calibration and Validation of MIKE 11HD Model 85 5.3 Simulation of River Water Surface Profile 96 5.4 Simulation of Flood Inundation Extent using MIKE FLOOD 98 5.4.1 Flood inundation simulation using SRTM bathymetry 98 5.4.2 Calibration of MIKE FLOOD model 100 5.5 Development of Design Flood Hydrographs 111
5.5.1 Base flow separations and development of dimensionless hydrographs
111 5.5.2 Development of best-fitted PDF 112 5.5.3 Results of error and sensitivity analysis of the PDF parameters
118 5.5.4 Development of design flood hydrographs 122 5.6 Non-dimensional Analysis of Stream Flow Hydrographs 127 5.7 Flood Hazard and Risk Mapping of the Delta 129 5.7.1 Flood vulnerability and risk mapping 131
Chapter 6 Summary and Conclusions 137
6.1 Summary 137
6.2 Conclusions 144
6.3 Future Scope of Study 146
