Contents
Certificate of original authorship i
Certificate of Dissertation Advisor’s consent iii
Acknowledgments v
Abstract vii
List of figures ix
List of tables xiii
1 INTRODUCTION 1
1.1 General 1
1.2 Low Impact Development 2
1.2.1 Objectives of LID 3
1.2.2 Key Elements of LID 3
1.2.3 Types of LID 3
1.3 Objectives of the study 4
1.4 Analytical Hierarchy Process (AHP) 4
1.5 Need of the Study 6
2 LITERATURE REVIEW 7
2.1 Potential Application of LID Techniques to Reduce Urban Flooding in Different Rainfall Pattern, Case Study for Quy Nhon, Vietnam 7
2.2 Low Impact Development (LID) Solutions for Flood-Resilient Urbanization 8
3 STUDY AREA 9
4 METHODOLOGY 10
4.1 Data Collection 10
4.2 Overall Methodology 10
4.3 Site suitability Methodology 11
4.4 BMP Siting tool 13
4.5 SWMM Modelling for runoff reduction calculation 15
5 DATA ANALYSIS 17
5.1 Temporal Change in Surfaces 17
5.1.1 Change in Land use 17
5.1.2 Change in Pervious Surface 21
5.2 Site Suitability of LID using AHP-MCDA 23
5.2.1 Land use 23
5.2.2 Hydraulic soil group 23
5.2.3 Slope 25
5.2.4 Stream 25
5.2.5 Weighted Overlay Tool 25
5.3 BMP Siting Tool 28
5.3.1 Bioretention 29
5.3.2 Infiltration Trench 31
5.3.3 Swales 31
5.4 Comparison between AHP and BMP 34
5.5 Design the Type of LIDs on Flooded Area 35
5.5.1 Identification of Flooded Area 35
5.5.2 Designing of LIDs 36
5.6 SWMM MODEL 41
5.6.1 Impact on Runoff Volume 41
5.6.2 Infiltration Rate 42
6 CONCLUSION 44
References 45
Appendix 1: ABBREVIATION USED 48
Appendix 2: COMPUTER MODELLING OF LID 49