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Abstract
Use of Geospatial Technology in Flood Mitigation
Dato' Ir. Hj. Ahmad Husaini Sulaiman
Director General
Department of Irrigation and Drainage , Malaysia
Flood is one of the major disasters affecting the population especially those living in high risk areas, in the
flood plains and coastal areas causing extensive damage to properties and even loss of lives. Great efforts
are taken by the government to mitigate the floods and ensure a safe environment for the society.
Planning, execution, monitoring and assessment of flood mitigation projects based on the holistic and
integrated approach of Integrated Flood Management (IFM) require knowledge of the entire river basin to
ensure a more effective output and outcome. Advances in geospatial technologies (GPS, Remote sensing
and GIS) has enabled the acquisition of data and analysis of the river basin for flood mitigation projects
(either structural or non-structural) in a faster and more accurate manner. GIS facilitates integration of
spatial and non-spatial geographical data such as rainfall and stream flows, river cross-sections and
profiles and river basin characteristics. Other informations such as flood maps, infrastructures, landuse,
social and economic information can be inventoried for future use. Flood maps prepared using satellite
images of real flood events and information from the ground are useful for flood damage assessment,
future flood mitigation planning and validation of hydraulic analysis. Flood hazard maps produced using
GIS enabled hydrological, hydraulic and DEM data are effective tools for land use planning, hazard
management and development control.
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