ASSESSMENT OF HYDRO MORPHOLOGY OF LOWER GUMTI RIVER BY MOHAMMAD AKTARUZZAMAN DEPARTMENT OF WATER RESOURCES ENGINEERING BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKA, BANGLADESH FEBRUARY 2010 ASSESSMENT OF HYDRO MORPHOLOGY OF LOWER GUMTI RIVER By Mohammad Aktaruzzaman (Roll No. 100716018 F) DEPARTMENT OF WATER RESOURCES ENGINEERING BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY, DHAKA A project submitted to the Department of Water Resources Engineering of Bangladesh University of Engineering and Technology, Dhaka, in partial fulfillment of the requirements for the degree Of MASTER OF ENGINEERING IN WATER RESOURCES ENGINEERING DEPARTMENT OF WATER RESOURCES ENGINEERING BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY DHAKA FEBRUARY 2010 CERTIFICATE OF APPROVAL We hereby recommend that the M.Engg. research work presented by Mohammad Aktaruzzaman, Roll No. 100716018F, Session: October 2007, entitled “Assessment of Hydro Morphology of lower Gumti River” be accepted as fulfilling this part of the requirement for the degree of Master of Engineering in Water Resources Engineering. Dr. Umme Kulsum Navera Chairman Associate Professor (Supervisor) Department of Water Resources Engineering BUET, Dhaka Dr. M. Abdul Matin Member Professor & Head Department of Water Resources Engineering BUET, Dhaka Dr. M. Monowar Hossain Member Professor Department of Water Resources Engineering BUET, Dhaka DECLARATION This is to certify that this project work entitled “Assessment of Hydro Morphology of lower Gumti River” has been done by me under the supervision of Dr. Umme Kulsum Navera, Associate Professor of the Department of Water Resources Engineering (WRE), Bangladesh University of Engineering and Technology (BUET), Dhaka. I do hereby declare that this project work or any part of it has not been accepted elsewhere for the award of any degree or diploma from any other institution. ……………………….. (Mohammad Aktaruzzaman) TABLE OF CONTENTS Page No . Table of Contents i List of Figures iii List of Table ix List of Abbreviations x List of Notations xi Acknowledgement xii Abstract xiii CHAPTER 1: INTRODUCTION 1 1.1 General 1 1.2 Background of the study 1 1.3 Objectives of the study 3 1.4 Layout of the project 4 CHAPTER 2: LITERATURE REVIEW 2.1 General 5 2.2 Hydro-morphological study in Bangladesh 5 2.3 Previous studies in Gumti River system 7 2.4 Summary 11 CHAPTER 3 : THEORETICAL CONSIDERATION, DATA AND METHODOLOGY 12 3.1 Theory 12 3.2 River Flow variables 13 3.2.1 Non-dimensionalization of variables 14 3.3 Data Collection 15 3.3.1 Cross Sectional data 15 3.3.2 Water level and discharge data 16 3.4 Methodology 19 3.4.1 Cross-sectional data analysis 20 3.4.2. Determination of bankful level 20 i Page No. 3.4.3 Calculation of area 20 3.4.4 Calculation of wetted perimeter 21 3.4.5 Calculation of Hydraulic radius 21 3.4.6 Calculation of average depth 22 3.4.7 Prediction of geometric parameters by different 22 (a) Julien - Wargadalam -Lee (2006) 22 (b) Julien-Wargadalam (1995) 23 (c) Lee-Julien (2006) 23 (d) Singh et.al.(2003) 24 (e) RSP (1996) 25 (f ) Lacey’s regime depth (1929) 25 3.5 Summary 26 CHAPTER 4: RESULTS AND DISCUSSIONS 27 4.1 General 27 4.2 Cross-sectional data analysis for Gumti River 27 4.2.1 Assessment of channel width and average depth 54 4.3 Relation between discharge parameter [Q2/5 / (Sg)1/5 ]/D 55 and aspect ratio,(B/D) 4.4 Non-dimensional correlation between shape factor (W/D) 62 and Froude number [V/(gD) 1 ∕ 2] 4.5 Water levels of Gumti River 64 4.6 Discharges of Gumti River 66 4.7 Relationship between area and width 67 4.8 Relationship between width and hydraulic radius 69 4.9 Summary 70 CHAPTER 5: CONCLUSIONS AND RECOMENDATIONS 71 5.1 Conclusions 71 5.2 Recommendations 72 REFERENCES 73 APPENDICES 77 ANNEX-A (FIGURE) 78 ANNEX-B (TABLES) 81 ANNEX-C (DATA) 91 ii LIST OF FIGURES Page No. Figure 1.2.1 Location of Gumti River inside Bangladesh 2 Figure 3.2.1 Location of BWDB transects along the Gumti River 18 Figure 3.4.1 Schematic diagram of cross-sectional area 21 Figure 4.2.1 Variation of observed water area and top width with the predicated values of Gumti for BWDB transects 28 RMGT 01 over time Figure 4.2.2 Variation of MBL of Gumti at BWDB transects RMGT 28 01 over time Figure 4.2.3 Variation of cross-section parameters of Gumti at 29 BWDB transect RMGT 01 over time Figure 4.2.4 Variation of observed average depth and hydraulic 29 radius with the predicated values for Gumti at BWDB transects RMGT 01 over time Figure 4.2.5 Variation of observed water area and top width with 30 the predicated values of Gumti for BWDB transects RMGT 02 over time Figure 4.2.6 Variation of MBL of Gumti at BWDB transects RMGT 30 02 over time Figure 4.2.7 Variation of cross-section parameters of Gumti at 31 BWDB transect RMGT 02 over time Figure 4.2.8 Variation of observed average depth and hydraulic 31 radius with the predicated values for Gumti at BWDB transects RMGT 02 over time Figure 4.2.9 Variation of observed water area and top width with 32 the predicated values of Gumti for BWDB transects RMGT 03 over time Figure 4.2.10 Variation of MBL of Gumti at BWDB transects RMGT 32 03 over time Figure 4.2.11 Variation of cross-section parameters of Gumti at 33 BWDB transect RMGT 03 over time iii Page No. Figure 4.2.12 Variation of observed average depth and hydraulic 33 radius with the predicated values for Gumti at BWDB transects RMGT 03 over time Figure 4.2.13 Variation of observed water area and top width with 34 the predicated values of Gumti for BWDB transects RMGT 04 over time Figure 4.2.14 Variation of MBL of Gumti at BWDB transects RMGT 34 04 over time Figure 4.2.15 Variation of cross-section parameters of Gumti at 35 BWDB transect RMGT 04 over time Figure 4.2.16 Variation of observed average depth and hydraulic 35 radius with the predicated values for Gumti at BWDB transects RMGT 04 over time Figure 4.2.17 Variation of predicated average depth (h) by different 36 methods of Gumti at BWDB transects RMGT 04 over time Figure 4.2.18 Variation of predicated width (w) by different methods 36 of Gumti at BWDB transects RMGT 04 over time Figure 4.2.19 Variation of observed water area and top width with 37 the predicated values of Gumti for BWDB transects RMGT 05 over time Figure 4.2.20 Variation of MBL of Gumti at BWDB transects RMGT 37 05 over time Figure 4.2.21 Variation of cross-section parameters of Gumti at 38 BWDB transect RMGT 05 over time Figure 4.2.22 Variation of observed average depth and hydraulic 38 radius with the predicated values for Gumti at BWDB transects RMGT 05 over time Figure 4.2.23 Variation of observed water area and top width with 39 the predicated values of Gumti for BWDB transects RMGT 06 over time Figure 4.2.24 Variation of MBL of Gumti at BWDB transects RMGT 39 06 over time Figure 4.2.25 Variation of cross-section parameters of Gumti at 40 BWDB transect RMGT 06 over time Figure 4.2.26 Variation of observed average depth and hydraulic 40 radius with the predicated values for Gumti at BWDB transects RMGT 06 over time iv Page No. Figure 4.2.27 Variation of observed water area and top width with 41 the predicated values of Gumti for BWDB transects RMGT 07 over time Figure 4.2.28 Variation of MBL of Gumti at BWDB transects RMGT 41 07 over time Figure 4.2.29 Variation of cross-section parameters of Gumti at 42 BWDB transect RMGT 07 over time Figure 4.2.30 Variation of observed average depth and hydraulic 42 radius with the predicated values for Gumti at BWDB transects RMGT 07 over time Figure 4.2.31 Variation of observed water area and top width with 43 the predicated values of Gumti for BWDB transects RMGT 08 over time Figure 4.2.32 Variation of MBL of Gumti at BWDB transects RMGT 43 08 over time Figure 4.2.33 Variation of cross-section parameters of Gumti at 44 BWDB transect RMGT 08 over time Figure 4.2.34 Variation of observed average depth and hydraulic 44 radius with the predicated values for Gumti at BWDB transects RMGT 08 over time Figure 4.2.35 Variation of observed water area and top width with 45 the predicated values of Gumti for BWDB transects RMGT 09 over time Figure 4.2.36 Variation of MBL of Gumti at BWDB transects RMGT 45 09 over time Figure 4.2.37 Variation of cross-section parameters of Gumti at 46 BWDB transect RMGT 09 over time Figure 4.2.38 Variation of observed average depth and hydraulic 46 radius with the predicated values for Gumti at BWDB transects RMGT 09 over time Figure 4.2.39 Variation of observed water area and top width with 47 the predicated values of Gumti for BWDB transects RMGT 10 over time Figure 4.2.40 Variation of MBL of Gumti at BWDB transects RMGT 47 10 over time Figure 4.2.41 Variation of cross-section parameters of Gumti at 48 BWDB transect RMGT 10 over time v Page No. Figure 4.2.42 Variation of observed average depth and hydraulic 48 radius with the predicated values for Gumti at BWDB transects RMGT 10 over time Figure 4.2.43 Variation of predicated average depth (h) by different 49 methods of Gumti at BWDB transects RMGT 10 over time Figure 4.2.44 Variation of predicated width (w) by different methods 49 of Gumti at BWDB transects RMGT 10 over time Figure 4.2.45 Variation of observed water area and top width with 50 the predicated values of Gumti for BWDB transects RMGT 11 over time Figure 4.2.46 Variation of MBL of Gumti at BWDB transects RMGT 50 11 over time Figure 4.2.47 Variation of cross-section parameters of Gumti at 51 BWDB transect RMGT 11 over time Figure 4.2.48 Variation of observed average depth and hydraulic 51 radius with the predicated values for Gumti at BWDB transects RMGT 11 over time Figure 4.2.49 Variation of observed water area and top width with 52 the predicated values of Gumti for BWDB transects RMGT 12 over time Figure 4.2.50 Variation of MBL of Gumti at BWDB transects RMGT 52 12 over time Figure 4.2.51 Variation of cross-section parameters of Gumti at 53 BWDB transect RMGT 12 over time Figure 4.2.52 Variation of observed average depth and hydraulic 53 radius with the predicated values for Gumti at BWDB transects RMGT 12 over time Figure 4.3.1 Relation between flow parameter [Q2/5 / (Sg)1/5 ]/D and 56 aspect ratio(B/D) of the Gumti for section RMGT 01 at Dudkandi Bazar .