Integrated assessment of sustainable urban drainage systems in Ho Chi Minh City, Viet Nam | |
| Author | Ho Huu Loc |
| Call Number | AIT Thesis no.WM-13-26 |
| Subject(s) | Urban drainage--Vietnam--Ho Chi Minh City Urban runoff--Vietnam--Ho Chi Minh City |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering Management |
| Publisher | Asian Institute of Technology |
| Abstract | Nhieu Loc Thi Nghe Basin, which is located in the central part of Ho Chi Minh City, is a one of the social-economical of the City. In recently years, this area is frequently affected by local flood and inundation from heavy rainfall. The City Municipality has tional flood mitigation have been implemented but yet to completely solve the problems. Therefore, the objective of this study is to assess another approach for flood control measures known as Sustainable Urban Drainage Systems (SUDS). As its name suggests, solutions sought by SUDS, apart from drainage effectiveness also consider environmental, social and economical aspects as well. It integrates other stakeholders in decision-making process and ultimately, achieving multiple benefits. The philosophy of SUDS has been extensively applied in developed cities in countries such as USA or Europe but not too much in developing counterpart. Therefore, the completion of this study is expected to explore opportunities to apply of this approach under the conditions of developing cities such as Viet Nam. Within the scope of this study, four most popular SUDS are considered: Rainwater harvesting, Green Roofs, Urban Green Space and Pervious Pavements. SUDS have multiple benefits alongside with flood mitigation, hence, requires assessment based on more than one perspective. Therefore, the integrated assessment for SUDS application in this study was done using Multi Criteria Analysis (MCA) based on four criteria: Flood mitigation, Environment, Aesthetics and Economic. Flood Mitigation is measures with runoff attenuation capacity and environment is measured based on pollutant trap efficiency. These criteria are handled with modeling approach using PCSWMM software. Aesthetics was analyzed through real life survey and face to face interviews Last but not least, the Economic aspect of SUDS was evaluated though the development of Life Cycle Costing Analysis of all the considered SUDS. As for the MCA methods, four different types of methods are used i.e. Dictatorship, Borda Count, Pair-wise Voting and AHP. Results from technical, social and economical comparisons are dissimilar. Green Roofs is the best flood mitigation measure where it can attenuate runoff by 20 %. Urban Green Space is the best performer in pollutant removal capacity with 35 %. As for social acceptance, Pervious Pavements is confirmed to be the most preferred one in terms of Aesthetics Values through statistical analysis of the social survey results. Through the survey, relative importance of the criteria is also explored of which Flood mitigation is the first concern, followed by Environment and Aesthetics. The next step is to put them together under MCA framework. The author decided to separate the first three criteria with Economic considerations because all Flood Mitigation, Environment and Social Acceptance are benefits that the community enjoy whereas the Government would not pay the Cost. Without Economic Concern, Green Roofs and Urban Green Space is the predominant SUDS. However, if the cost is the top-priority of decision makers, Pervious Pavements will be chosen for their competitive prices. |
| Year | 2013 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Babel, Mukand S.;Sutat Weesakul; |
| Examination Committee(s) | Perret, Sylvain;Shrestha, Sangam; |
| Scholarship Donor(s) | Swedish International Development Cooperation Agency (SIDA), Sweden; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2013 |