Inundation Risk of Storm Surge in the West Coast of Bangladesh
Dedicated To
This book is outcome of an academic research under NUGELP of Nagoya University, Japan supported by JICA.
Foreword
I am very pleased that the book ‘Inundation risk of storm surge in the west cost of Bangladesh’ is being published. In this book I have identified the inundation risk levels derived from inundation depth and inundation velocity by applying a numerical model. This unveiled a new dimension for the geographers of Bangladesh. I believe Geographers can take the advantage by learning the fundamentals of storm surge simulation from this book and can apply similar techniques using GIS.
In this book I have find out different inundation characteristics and impact of two different cyclone within a common affected area. Super cyclone Sidr was a huge in term of its size, speed, affected area, affected population and the height of storm surge. Whereas, cyclone Aila was of medium category but intrude into far inland through the estuarine river channels due to the pressure of high tide and other external causes like the broken embankments by the river side’s. This caused a long term water logging in the Aila affected area. Interestingly, similar behavior was found in the storm surge simulation as well. If we could have performed such simulation earlier we could have enough information to plan for taking adequate mitigation measures.
Disaster management authorities and other stakeholders in Bangladesh can utilize this information for sustainable risk reduction interventions both for preparedness and for response activities in the west coast area of Bangladesh. Similar simulation could be carried out along the whole coastal area of Bangladesh and Geographers can take the lead for modeling such simulation by using GIS.
24 May 2014, Dhaka
Nazmun Nahar
Associate Professor
Department of Geography and Environment
University of Dhaka
Content
LIST OF FIGURES...Page ix
LIST OF TABLES...Page x
ACKNOWLEDGEMENT...Page xi
LIST OF ACRONYMS...Page xii
Introduction...Page 3
- Coastal Environment of Bangladesh...Page 4
- Coastal Area of Bangladesh...Page 5
- Coastal Livelihood of Bangladesh...Page 7
- Cyclone Hazard in Bangladesh...Page 8
- Chronology of Modeling Storm Surge...Page 8
- Rational for Modeling Storm Surge in Bangladesh...Page 11
Modeling Storm Surge and Risk Assessment...Page 15
The Study Area...Page 15
Computational Domain and Conditions...Page 15
Numerical Simulation...Page 17
- Typhoon Model...Page 18
- The SWAN Model...Page 19
- Storm Surge Model...Page 19
- Inundation Model...Page 21
- Simulation Flow chart...Page 23
Risk Assessment in the Study Area...Page 25
Data Sources...Page 27
Assessment of Cyclone Sidr...Page 31
Validation of Data Fields...Page 31
- Meteorological Field...Page 31
- Storm Surge Field...Page 34
- Inundation Field...Page 36
Risk Assessment for Cyclone Sidr...Page 38
- Inundation Risk from Inundation Depth...Page 38
- Inundation Risk from Inundation Velocity...Page 40
- Integrated Risk...Page 41
Assessment of Cyclone Aila...Page 45
Validation of Data Fields...Page 45
- Meteorological Field...Page 45
- Storm Surge Field...Page 48
- Inundation Field...Page 48
Risk Assessment of Aila...Page 51
- Inundation Risk from Inundation Depth...Page 51
- Inundation Risk from Inundation Velocity...Page 53
- Integrated Risk...Page 54
Inundation Risk Characteristics: Sidr vs Aila...Page 59
Conclusion and Recommendations...Page 67
References...Page 70
LIST OF GIGURES
Fig. 1: Coastal areas of Bangladesh (Zones and Regions) 6
Fig. 2: Location of the study area 15
Fig. 3: Computational domain 16
Fig. 4: Minimum height of polder blocks 17
Fig. 5: Outline of numerical models 18
Fig. 6: Calculation of typical overflow discharge 22
Fig. 7:Estimation of inundation height 23
Fig. 8: Flowchart of Storm surge and Inundation model 24
Fig. 9: Validation sites for meteorological data field 32
Fig. 10: Validation result of meteorological field 34
Fig. 11: Validation sites for water level data 35
Fig. 12: Validation result of water level field 36
Fig. 13: Calculated inundations by cyclone Sidr 37
Fig. 14: Observed and calculated inundation areas of cyclone Sidr 38
Fig. 15: Calculated risk from inundation depth for cyclone Sidr 39
Fig. 16: Calculated risk by inundation velocity for cyclone Sidr 41
Fig. 17: Integrated inundation risk of cyclone Sidr 42
Fig. 18 Validation of metrological field 47
Fig. 19: Validation of water level field 48
Fig. 20: Calculated inundations by cyclone Aila 49
Fig. 21: Observed and calculated inundation map of cyclone Aila 50
Fig. 22: Calculated inundation depth of cyclone Aila 52
Fig. 23: Calculated inundation velocity of cyclone Aila 53
Fig. 24: Integrated inundation risk of cyclone Aila 55
Fig. 25 Calculated maximum inundation depth by risk levels 59
Fig. 26: Calculated maximum inundation velocity by risk levels 60
Fig. 27: Cyclone tracks 61
Fig. 28: Integrated inundation risk 61
Fig. 29: Population affected by inundation risk 62
LIST OF TABLES
Table 1: Computational domain and conditions 16
Table 2: Risk by inundation depth 25
Table 3 Risk by inundation velocity 26
Table 4: Possibility of evacuation by walk based on integrated risk 26
Table 5: Risk levels for the integrated inundation risk 26
Table 6: Sources of data collection 27
Table 7: Calculated risk assessment 61
Table 8: Observed physical & other characteristics and cyclone damage 63
Specifications
- বইয়ের লেখক: Nazmun Nahar & Dr Koji Kawasaki
- আই.এস.বি.এন: 9847021401071
- স্টকের অবস্থা: স্টক আছে
- ছাড়কৃত মূল্য: 150.00 Taka
- বইয়ের মূল্য: 200.00 Taka
- সংস্করণ: 1st Edition
- পৃষ্ঠা: 84
- প্রকাশক: Hakkani Publishers
- মুদ্রণ / ছাপা: Techno Bd International
- বাঁধাই: Hardback
- বছর / সন: June, 2014