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A hybrid approach using GIS-based fuzzy AHP–TOPSIS assessing flood hazards along the south-central coast of Vietnam
Nguyen, H.X.; Nguyen, A.T.; Ngo, A.T.; Phan, V.T.; Nguyen, T.D.; Do, V.T.; Dao, D.C.; Dang, D.T.; Nguyen, A.T.; Nguyen, T.K.; Hens, L. (2020). A hybrid approach using GIS-based fuzzy AHP–TOPSIS assessing flood hazards along the south-central coast of Vietnam. Applied Sciences-Basel 10(20): 7142. https://hdl.handle.net/10.3390/app10207142
In: Applied Sciences-Basel. MDPI: Basel. e-ISSN 2076-3417
|   |
| Author keywords |
fuzzy AHP; fuzzy TOPSIS; GIS; flood hazards; South-Central Coast of Vietnam |
| Auteurs | | Top |
- Nguyen, H.X.
- Nguyen, A.T.
- Ngo, A.T.
- Phan, V.T.
|
- Nguyen, T.D.
- Do, V.T.
- Dao, D.C.
- Dang, D.T.
|
- Nguyen, A.T.
- Nguyen, T.K.
- Hens, L.
|
| Abstract |
Flood hazards affect the local economy and the livelihood of residents along the South-Central Coast of Vietnam. Understanding the factors influencing floods’ occurrence potentially contributes to establish mitigation responses to the hazards. This paper deals with an empirical study on applying a combination of the fuzzy analytic hierarchy process (AHP), the fuzzy technique for order of preference by similarity to ideal solution (TOPSIS), and a geographic information system (GIS) to assess flood hazards along the South-Central Coast of Vietnam. Data are collected from focus group discussions (FGDs) with five communal authorities; a questionnaire completed by eight hamlet heads in the Phuoc Thang commune (Binh Dinh province); and documents, reports, and thematic maps provided from official sources. A total of 12 maps of flood factors are prepared. The results show that terrain elevation, creek-bottom terrains, high tide-induced flooding area, and distance to water body are the main factors affecting flood hazards. The An Loi hamlet faces the highest risk for floods, followed by Lac Dien, Luong Binh, and Pho Dong. The map of flood hazards indicates the western part is assessed as low hazard, whereas the eastern part is a very high hazard area. The study findings show that the hybrid approach using GIS-based fuzzy AHP–TOPSIS allows connecting decision makers with the influencing factors of flooding. To mitigate floods, both the Vietnam national government and the Binh Dinh provincial government should integrate natural hazard mitigation into socio-economic development policies. |
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