Open AccessEvaluation and validation of flood hazard zoning using Analytical Hierarchy Process and GIS: A case study of Lam River basin (Vietnam)
Author(s) -
Ba Dung Nguyen,
Quynh Nga Nguyen,
Thi Lan Pham,
Thi Le Le,
Tuyet Minh DANG
Publication year - 2021
Publication title -
vestnik sankt-peterburgskogo universiteta. nauki o zemle
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.236
H-Index - 5
eISSN - 2587-585X
pISSN - 2541-9668
DOI - 10.21638/spbu07.2021.410
Subject(s) - flood myth , zoning , analytic hierarchy process , structural basin , natural hazard , drainage basin , hydrology (agriculture) , hazard , warning system , environmental science , natural disaster , 100 year flood , water resource management , geographic information system , geography , civil engineering , cartography , geology , computer science , meteorology , engineering , operations research , geotechnical engineering , geomorphology , telecommunications , chemistry , archaeology , organic chemistry
In recent years, the Lam river basin had suffered various forms of natural disasters such as floods, inundations, windstorms, tornadoes, etc. Among all these, the flood has proved to be the greatest threat to the people and the socio-economic development in the basin. Moreover, it is very frequent as compared to other natural disasters. In view of the fact that such disastrous floods are still occurring in the basin, it becomes a necessity to determine the causes and analyze the components affecting flood. This is important in order to develop an early flood warning system and thus minimize the negative impact of flood in the Lam river basin on the people and the facilities. In this paper, the Analytical Hierarchy Process (AHP) analysis method integrated with GIS technology is used to map flood risk zones in the Lam river basin. The parameters used for the analysis are the main causes affecting the floods. In addition to the 5 most commonly used factors such as slope, rainfall, land cover, soil, and drainage density, this study also includes a new factor - relative slope length to compute a more rigorous and reliable model. The results were compared with the two more methods of flood hazard zoning in the same study area: the method of the main flood caused factor analysis and the method of inheriting, data analyzing, and processing. The results were also validated by the historical flood data of three years 2010, 2013, and 2016.