TITLE

Population evacuation: evaluating spatial distribution of flood shelters and vulnerable residential units in Dhaka with geographic information systems

AUTHOR(S)
Masuya, Akiko; Dewan, Ashraf; Corner, Robert
PUB. DATE
September 2015
SOURCE
Natural Hazards;Sep2015, Vol. 78 Issue 3, p1859
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The objective of this study was to evaluate the spatial distribution of flood shelters in relation to flood hazards in a resource-poor country. Flood hazard estimates were developed from multi-temporal flood-affected frequency and floodwater depth maps. It is intended that the results could support non-structural flood management. In addition, the location of vulnerable housing units was mapped and their accessibility to shelters was computed with the aid of spatial techniques using a geographic information system. A subset of the Dhaka Metropolitan Development Plan zone and Dhaka megacity, covering an area of 878 km, was used as a case study since this area is likely to experience more frequent and intense flooding in coming years as a result of rapid urbanisation and climatic change. Using three different criteria, the study identified that a total of 5537 buildings, out of 6342 candidate structures, can be used as emergency shelters during floods, and approximately 145,000 dwellings (19.3 % of total residential units) of various types were located in places that are prone to flood. Further, many (3500 of 5537) of the identified shelters were not sufficiently close to vulnerable dwellings to protect approximately 496,000 potential flood victims during an emergency. There were 26.4 % of the total residents living in vulnerable housing units. In addition, 1098 flood shelters were distributed over five catchments in the study area, although in close proximity to vulnerable residents, do not have the capacity to house the number of people who could potentially seek refuge there. This study, the first of its kind in Dhaka, can assist urban planners and emergency managers in developing an effective evacuation plan for an imminent flood disaster as the city currently lacks any disaster management plan.
ACCESSION #
108509897

 

Related Articles

  • Tight coupling 2D integrated urban inundation model on GIS to a high-density area, South Korea. Kang, S. H. // Water Science & Technology;2009, Vol. 60 Issue 2, p283 

    In urban areas with a high building density, features such as roads, buildings, and river dykes significantly effect flow dynamics and flood propagation. This should therefore be accounted for in the model set-up. While 2D hydraulic models of densely urban areas are at the forefront of current...

  • Modeling Flood Hazard Zones at the Sub-District Level with the Rational Model Integrated with GIS and Remote Sensing Approaches. Asare-Kyei, Daniel; Forkuor, Gerald; Venus, Valentijn // Water (20734441);Jul2015, Vol. 7 Issue 7, p3531 

    Robust risk assessment requires accurate flood intensity area mapping to allow for the identification of populations and elements at risk. However, available flood maps in West Africa lack spatial variability while global datasets have resolutions too coarse to be relevant for local scale risk...

  • Report indexes global risk.  // Crisis Response Journal;2011, Vol. 7 Issue 3, p7 

    The article discusses the 2011 World Risk Report which compares the global risk indexes, descriptive content, and factors of vulnerability of some countries in responding to disasters and climate change.

  • Database of geo-hydrological disasters for civil protection purposes. Blahut, Jan; Poretti, Ilaria; Amicis, Mattia; Sterlacchini, Simone // Natural Hazards;Mar2012, Vol. 60 Issue 3, p1065 

    This paper presents the results of a research concerning available historical information about natural hazards (landslides and floods) and consequent disasters in the Consortium of Mountain Municipalities of Valtellina di Tirano, in Northern Italy. A geo-referenced database, collecting...

  • EVACUATION SIMULATION IN KALAYAAN RESIDENCE HALL, UP DILIMAN USING GAMA SIMULATION SOFTWARE. Claridades, Alexis Richard C.; Villanueva, Jara Kaye S.; Macatulad, Edgardo G. // International Archives of the Photogrammetry, Remote Sensing & S;2016, Vol. 42 Issue 4/W1, p83 

    Agent-Based Modeling (ABM) has recently been adopted in some studies for the modelling of events as a dynamic system given a set of events and parameters. In principle, ABM employs individual agents with assigned attributes and behaviors and simulates their behavior around their environment and...

  • Brazilian Floods, Government Inaction Trigger Deadly Landslides. Young, Joseph // ENR: Engineering News-Record;5/3/2010, Vol. 264 Issue 14, p1 

    The article reports on the floods and mudslides which killed 249 people in Rio de Janeiro and outlying metropolitan area in Brazil in April 2010. According to fire department officials, Niterói city has the highest toll of mortalities. Having studied flood-related disasters, the Geosciences...

  • Development of a screening method to assess flood risk on Danish national roads and highway systems. Nielsen, N. H.; Larsen, M. R. A.; Rasmussen, S. F. // Water Science & Technology;2011, Vol. 63 Issue 12, p2957 

    A method to assess flood risk on Danish national roads in a large area in the middle and southern part of Jutland, Denmark, was developed for the Danish Road Directorate. Flood risk has gained renewed focus due to the climate changes in recent years and extreme rain events are expected to become...

  • Coasts: the high-risk areas of the world. Kron, Wolfgang // Natural Hazards;Apr2013, Vol. 66 Issue 3, p1363 

    No other region is more threatened by natural perils than coasts. Fierce winds, storm surges, large waves and tsunamis expend their destructive energy when they reach the coastline. Constituting, in many cases, the boundary between continental plates, coasts experience earthquakes and volcanic...

  • From Editor. Joshi, P. K. // International Journal of Geoinformatics;Mar2013, Vol. 9 Issue 1, preceding p1 

    An introduction is presented in which the editor discusses climate change as a geographic problem as well as the importance of geospatial technology.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics