Flood Risk Measuring under the Flood Protection Embankment Construction in Dhaka Metropolitan Zone

Marju Ben Sayed^1, and Shigeko Haruyama¹

¹Graduate school of Bioresources, Mie University, 1577 Kurimamachiyacho, Tsu city, Mie Pref. Japan

Cite this paper

Marju Ben Sayed and Shigeko Haruyama. Flood Risk Measuring under the Flood Protection Embankment Construction in Dhaka Metropolitan Zone. Journal of Geosciences and Geomatics. 2017; 5(2):46-58. doi: 10.12691/JGG-5-2-1

Abstract

The flooding is a common feature for problem solution in rapidly urbanizing Dhaka city. In this research, evaluation of flood risk of Dhaka city in Bangladesh has been developed by using an integrated approach of GIS, remote sensing with socio-economic data. The purpose of the study is to evaluate the flooding risk concerning with the flood protection embankment in remarkable flooding events (1988, 1998 and 2004) and urbanization of Dhaka metropolitan zone. In this research, we considered the Dhaka city into two parts east Dhaka where is outside the flood protection embankment and west Dhaka where is inside the flood protection embankment. Using statistical data we explored the socio-economic status of the study area population by comparing density of population, land price and income level. We have drawn the cross section profile of the flood protection embankment into three different points for realizing the flooding risk in the study area, especially in the historical flooding year (1988, 1998 and 2004). According to the physical condition of the study area, the land use/land cover map has been classified into five classes. Comparing with each land cover unit, historical weather station data and the socio-economic data the flooding risk has been evaluated. Although various adaptation strategies for prevention infrastructure was developed on basis of 1988 memorial flood. As a result, urban area expansion has driven by infrastructure development by 10% and population growth by 5% inside the embankment area. The socio-economic development such as; the average total income inside of embankment has been increased 10 USD while the income outside the embankment remain same.

Keywords

Land use/ land cover change, Socio-economic, Dhaka city, GIS, Flood

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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