HAZARD RISK MAPPING
THROUGH SATELLITE IMAGES
Azmi Hassan, Lecturer
Faculty of Surveying
Universiti Teknologi Malaysia
Skudai Johor Malaysia
Shattri Mansor, Lecturer
Faculty of Engineering
Universiti Pertanian Malaysia
Serdang Selangor
ABSTRACT
Hazards such as floods can be predicted using the appropriate
combinations of data. This paper will discussed a method of
flood prediction using the concept of risk probability analysis.
The heart of this method is to take into account the changing of
hydrological characteristics of an area through satellite images.
From this analysis a map will be produced which provides
information of areas that are prone to flood. Satellite images
from MSS band 4, 5, 6 and 7 for the year 1985 was used as case
study.
INTRODUCTION
The effective management of flood plains consist of more than
building detention reservoirs and levees. As urban pressure are forcing
more and more developments on flood plains, such devices as flood-plain
regulations and flood proofing are coming into wider use. These devices,
however, require information as to what areas are likely to be flooded.
Flood-hazard mapping is a means of providing flood-plain information
for planning and management programs. Such information should be designed
to assist officials and private interests in making decisions and
alternative plans concerning the development of specific lands subject to
flooding.
Hydrological models, especially those having parameters defined in
terms of land cover and other characteristics, are becoming increasingly
important tool in the development of water resource planning and
management strategies. Even when the area involved is small, the
quantification of the spatial distribution of the land covers, soil types
and topographic variables is extremely tedious and time consuming when
approached with conventional methods. Fortunately, the efficiency of the
hydrologic model parameter defination tasks can be increased through the
used of satellite images, as well as the digital elevation models.
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