MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND TRAINING AND RURAL DEVELOPMENT THUY LOI UNIVERSITY PHAM THI HAN THESIS OF MASTER DEGREE HA NOI - 2016 MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE, AND TRAINING AND RURAL DEVELOPMENT ‘THUY LOI UNIVERSITY RESEARCH ON HYDRODYNAMICS TO SERVE LAYOUT DESIGN OF BEACH NOURISHMENT PROJECT FOR THE MUI NAIBEACH, HA TIEN, KIEN GIANG PROVINCE ‘Major: Coastal Engineering and Management Code: 62-58-02-03 THESIS OF MASTER DEGREE SUPERVISOR: Assoc. TRAN THANH TUNG HA NOT - 2016 DECLARATION T guarantee the work which is being presented in this thesis entitled, “Research on hydrodynamics to serve layout design of beach nourishment project for the Mui Nai beach, Ha Tien, Kien Giang province” in partial complete of the requirement for the award of Master thesis of Coastal Engineering Management, is an authentic record of my own work carried out under supervision Assoc Prof. Tran Thanh Tung. The ‘matter embodied in this thesis has not been submitted by me for the award of any other degree or diploma Ha Noi, December 16, 2016 Pham Thi Han ACKNOWLEDGMENTS I would like to express my sincere gratitude for my advisor Assoc.
Tran ‘Thanh Tung was help me complete my master thesis. also want to show deep thanks to Master Nguyen Thanh Luan who is making value contributions to success in Master course 1 would like to thank faculty of Marine and Coastal Engineering of Thuy Loi University and Key laboratory of river and coastal engineering for help me to ‘complete thesis on schedule. Finally, I would like to express my special appreciation to my friends and colleagues for their support and encourage. I would like to express deep gratitude to the members ‘of my family Ha Noi, December 16, 2016 Pham Thi Han TABLE OF CONTENTS INTRODUCTION 1 1.
The necessity of study 1 2. Methodology of the thesis 3 4. Thesis outline 4 CHAPTER 1. OVERVIEW OF BEACH NOURISHMENT AND STUDY AREAS 1.1 Introduction of beach nourishment 5 1.1 Beach nourishment, a basic concepts $ 1.2 The beach nourishment in developed countries 8 1.3 Beach nourishment in Vietnam R 1.2Brief description of the study area 15 1.1Geographical location and natural conditions 15 1.2 Topography, geomorphology characteristics 1 1.3 Hydro-marine conditions of study area 7 1.2-4§ocial and economic features 18 CHAPTER 2.
SETUP HYDRODYNAMIC AND WAVE MODEL FOR STUDY AREA, 20 2.2Data usage for model setup, calibration and verification 24 2. Water levels observation and field measurement 28 2.3 Setup wave and tidal models for large domain 32 2.4Setup hydrodynamics model for the M 36 2.2Model calibration 39 CHAPTER 3. CRITERIA FOR BEACH NOURISHMENT AND DESIGN BEACH NOURISHMENT FOR MUI NAI BEACH 40 3.1 Analysis of wave climate and wind regime for the study area 40 3.2 Criteria for beach nourishment project 4“ 3.2 Environmental criteria and landseape 4 3.4 Criteria of the legal framework and implemented project beach nourishments B 3.$ Criteria for planning, protection, exploitation and using of coastal resource 43 3.3 Design the Mui Nai beach nourishment project “4 43.1Design beach nourishment profile “4 3.2 Volume of sand fill and sand composition 4 3.4 Computation lifetime for the Mui Nai beach nourishment project 4 3.1 Estimation of annual alongshore sediment transport for study area 4 3.2Computation lifetime of the Mui Nai beach nourishment project ST HAPTER 4, DESIGN BEACH NOURISHMENT IN COMBINATION WITH |UBMERGED GEOTUBE FOR THE MUI NAI BEACH 36 4.1 Design draft layout for submerged geotube 36 4.1 Criteria proposed plan 56 4.2 Technical solutions is proposed 56 4.3 Design layout for submerged geotubes 58 4.14 The parameters design layout of submerged geo-tube for beach nourishment60 4.2 Simulation waves pattern with and without submerged geotube a 42.1 Simulation scenarios for waves a 42.2 Simulation results and analysis 6 4.3 Estimated sediment loss behind submerged geo-tube 7 4.3 Simulation flow pattern with and without submerged geotube 7 43.1 Simulation scenarios for tide and wave 74 4.2 Simulation results and analysis 7 44 Propose layout for beach nourishment in combination with submerged geotube 86 CONCLUSIONS AND RECOMMENDATIONS 87 Conclusions 87 Recommendations 88 REFERENCI 89 ‘THE APPENDIX 1 LIST OF FIGURES Figure 1 [Beach nourishment (left) and shore-face nourishment (right)(Source: Internet) 6 Figure1, 2Dam in Mui Ne, Binh Thuan (Source: Google Earth) 4 Figure 1. 3Location of Ha Tien town, Kien Giang province 16 Figure1.
4The rear beachof Mui Nai beach, Ha Tien Town, Kien Giang Province 16 igure 2. ILoeation of pointsobservingwaves WV 1, currents FLLand water level WL1 ‘on satellite images 26 Figure 2. 2Points setting automatic equipment to observe water level, WLI, under the Wharf in front Ta Pang motels 26 Figure 2. 3 The locations of the sediment sampling area Mui Nai - Ha Tien 26 Figure 2.
4Water level at rear beach of Mui Nai to 18 hours of June 6, 2016 to 18 hours of June 9, 2016 28 Figure 2. 5 Grid and computation domain of wave and tidal models (large domain) 32 Figure 2. 6 Bed topography of wave and tidal models, 33 Figure 2.7 Comparison of measured and calculated water levels of the Phu Quoc gauging stations from May 6, 2010 to May 20,2010 35 Figure 2. 8Comparison of measured and calculated wave height at Mui Nai station, from 18 to 21 of March, 2016 35 Figure 29Compaison of measured and calculated water levels, Phu Quoc gauging stationfrom September 2, 2010 to September 6, 2010 36 Figure 2.
10Computational domain of the Mui Nai hydrodynamies model 37 Figure 2. 11 Grid mesh H and domain of hydrodynamies model 37 Figure 2, 12 Topography of hydrodynamics model for study area 3 Figure 2. 13Comparison of measured and calculated water levels at Mui Nai beach, 16th of March to 22 of March, 2016 39 Figure 3. IMonthly wind rose average month, the period from 2009 to 2016 years, Phú ‘Quoc gauging station (Source: WindFinder com GmbH & Co.
2Monthly wave rose average month, the period from 2009 to 2016 years, Phu Quoc gauging station (Source: WindFinder.com GmbH & Co. 3The scope of dry beach: width 50m, elevation +0. 4The scope of submerged beach: width 40m, slope of 1/20, bed elevation at seaside -1. SDefinition ofthe angle of wave propagation with respect to the coast 46 Figure 3.
6Schematization of triangular beach fill ayer 31 Figure 3. Lifetimes as function of total fill volume 35 Figure 4. 1 Solution submerged built by geotube to sand pump (Source: Internet) 57 Figure 4. 2 Plan view of submerged geotube (Source: Google earth) 59 Figure 4.3 Frequency line of synthesis level at point 139 (104027 "A, 10025: B) My Dục, Ha Tien town, Kien Giang province (Source: I4TCNI613~ 2012) 60 Figure 4 4Layout of submerged geotube for the beach nourishment project “ Figure 4.
5The boundary conditions in wave model 6 Figure 4. 6Location of points on section extracted to calculation results for wave model Source: Google earth) 65 igure 4.7 The grid incase with and without submerged geotube 66 Figure 4. EWave height at MCI section, simulation scenarios without geotube 66 Figure 4.Wave height at MC2 section, simulation scenarios without geotube 67 Figure 4. 10Wave pattern in 4 simulations scenario, without submerged geotube 69 Figure 4.
11 Wave height at MCI section, scenarios with submerged geotube 9 Figure 4. 12Wave height at section MC2,scenarios with submerged geotube 70 Figure 4. 13Wave mode the scripts of the case submerged geo-tube 1 Figure 4, 14 Cros “shore profiles in central section computed by DELFT3D-model (waves oblique to coast) n Figure 4, 15Shows the time development of the total beach fill volume by time 73 Figure 4. 16Water levels at Ha Tien station, 2015 and period of highest spring tide in November 75 Figure 4.
17The boundary conditions in hydrodynamies model 75 Figure 4. 18The location to extraet the hydrodynamics data 16 Figure4. 19Water levels at boundary, from 12" Nov. 20The area outside submeged geotube of ease current status id Figure 4.
21The area outside submeged geotube of case with submerged geotube 78 Figure 4. 22The area outside submeged geotube of case current status. 23The area outside submeged geotube of case submerged geotube 9 Figure 4. 24The area inside submeged geotube of case current status, T9 Figure 4 side submeged geotube ofcase with submerged geotube 80 Figure 4 26The area inside submeged geotube ofease current status 80 Figure 4.
27The area inside submeged geotube ofease with submerged geotube SI Figure 4 28The point between submeved geotubes of ease current status 8 Figure 4. 29The point between submeged geotubes of ease with submerged geotube 82 Figure 4, 30The point between submeged geotubes of case current status sẽ Figure 4, 31The point betreen submeged geotubes ofcase with submerged geotube 83 Figure 4. 32Current speed at measuring point with wave direction West before and after the submel 84 Figure 4, 33Current speed at measuring point with wave direction southeastbefore and after the submerged geotube 85 igure 4. 34Currents speed corresponding to the scripts of the status quo plan 85 Figure 4.
35Current speed in the scripts of case with submerged geotube 86 LIST OF TABLES Table 1. IComparison about the number of projects, the frequency and volume of ‘material used for beach nourishment in some countries 7 Table 1. 2Comparison of common parameters beach nourishment project between a numbers of countries 8 Table 2. 1Coordinates of stations observing wave and water level 25 ‘Table 2.
2Description of hydro-dynamics survey + Table 2. 3Quantity of taking suspended sediment and bottom sediment 21 ‘Table 2. 4Water level characteristics at rear beach Mui Nai, Ha Tien town, 28 Table 2. SResults of characteristic wave at WV1 station, averaged for each day 29 ‘Table2.
6Characteristic of wave at WV station, the real beach resort of Mui Nai 29 Table 2. 7Analysis of 12 samples suspended sediment in the Mui Nai beach 30 Table 2. 8The synthesis of mechanical characteristics for 16 samples bed sediment in the areas Mui Nai beach 31 Table 3. 1Statisties waves offshore at Phu Quoc Island from 2005 to 2015 (wave NOAA) 40 ‘Table 3.
2Brief description of the beach nourishment area 4 Table 3. 3Statistical analysis of data offshore wave Phu Quoc Island in 2005-2015 NOAA station 49 Table 3. 4Input data of wave and wave angle 49 ‘Table 3. SInput data of sediment and other main parameters 50 ‘Table 3.60utput data s0 ‘Table 3.
7Input data for calculation lifetime 33 Table3. SOutput data for lifetime of project, st ‘Table4. 1Synthesis of the scripts for wave model 6 Table 4. 2In put data of the scripts for wave model oF ‘Table 4.
3Description of extraction points on wave model 65 ‘Table 4. 4Wave height at Section MCI, MC2, without geotube 68 Table 4. 5Wave height at Section MCI, MC2 with submerged geotube T0 Table 4. 6Wave climate of winter season North Sea (180days; October to March) 72 Table 4.
7Synthesis of the ios for hydrodynamics model 4 Table 4. 8Input dạ ta of the scenariosfor hydrodynamics model 75 Table 4. 9Current speed according tothe s xipts 84 INTRODUCTION 1. The necessity of study The coastal eco-tourism zone of Mui Nai (Ha Tien town, Kien Giang province) is situated in the southwest of Vietnam, with special topography and it has an important role in the economic - social development, security defense and security of Kien Giang province in particular and tourism Southwest region in general.
Geographical coordinates: From 104”40°-105"32'40" East longitude; From 9°23°50"- 10°32°30" North latitude. ‘The study area is located in the west sea, shielded by Mui Nai in the South (Mountain Lights) about 8 km west ofthe island are some of Cambod ‘more than 30 km away from Phu Quoc island. We can say the project area is shielded almost connected with the sea on both sides, creating a gentle waves mode than in other beach area of ‘Vietnam. Besides, here the tidal magnitude reaches a modest value, from 1.
“The coastal eco-tourism zone of Mui Nai beach comprises two beaches: front beach ‘and a rear beach.