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Mangroves as Protection from Storm Surges in Bangladesh

33 Pages Posted: 22 Nov 2017 Last revised: 5 Dec 2017

Susmita Dasgupta

World Bank - Development Research Group (DECRG)

Md. Saiful Islam

Institute of Water Modeling - Port and Estuary Division

Mainul Huq

World Bank

Zahirul Huque Khan

Institute of Water Modeling - Port and Estuary Division

Md. Raqubul Hasib

Institute of Water Modeling - Port and Estuary Division

Date Written: November 21, 2017

Abstract

Mangrove forests can reduce the vulnerability of adjacent coastal lands from storm surges by slowing the flow of water. Although the potential utility of mangroves in disaster risk reduction is increasingly recognized by coastal managers, efficient use of this ecosystem-based protection is often hindered by the scarcity of location-specific information on the protective capacity of mangroves. This paper evaluates that capacity in seven coastal locations of Bangladesh, where surge heights can range from 1.5 to 9 meters. Estimates confirm varying levels of protection from different species, width, and density of mangrove forests. The findings highlight that mangroves must be used along with built infrastructure such as embankments. However, mangroves in the foreshore of embankments will contribute to savings in maintenance costs by protecting the built infrastructure from breaching and other damages.

Keywords: Disaster Management, Social Risk Management, Hazard Risk Management

Suggested Citation

Dasgupta, Susmita and Islam, Md. Saiful and Huq, Mainul and Khan, Zahirul Huque and Hasib, Md. Raqubul, Mangroves as Protection from Storm Surges in Bangladesh (November 21, 2017). World Bank Policy Research Working Paper No. 8251. Available at SSRN: https://ssrn.com/abstract=3075610

Susmita Dasgupta (Contact Author)

World Bank - Development Research Group (DECRG) ( email )

1818 H. Street, N.W.
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Washington, DC 20433
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202-473-2679 (Phone)
202-522-3230 (Fax)

HOME PAGE: http://econ.worldbank.org/staff/sdasgupta

Md. Saiful Islam

Institute of Water Modeling - Port and Estuary Division ( email )

Dhaka
Bangladesh

Mainul Huq

World Bank

1818 H Street, N.W.
Washington, DC 20433
United States

Zahirul Huque Khan

Institute of Water Modeling - Port and Estuary Division

Dhaka
Bangladesh

Md. Raqubul Hasib

Institute of Water Modeling - Port and Estuary Division

Dhaka
Bangladesh

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