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Overview | Earthquake | Drought | Fire | Flood & Cyclones | Landslide& Soil Erosion | Volcano
Map Malaysia 2009
Abstract
Analysis of Change Detection of Simulated Droughts and Floods of Water Bodies
Dinesh Sathyamoorthy
Research Officer
Sensor Branch
Instrumentation and Electronics Division
Science & Technology Research Institute for Defence (STRIDE)
Malaysia
dinsat60@hotmail.com
Change detection is the process of identifying differences in the state of an object or phenomenon by
observing it at different times monitoring and managing natural resources and urban development
because it provides quantitative analysis of the spatial distribution of the population of interest. In this
paper, the characterization of regions of change of simulated droughts and floods of water bodies is
performed. Power law relationships are observed between the areas of regions of change of simulated
droughts/floods and the actual levels. These power law relationships arise as a consequence of the fractal
properties of the regions of change of simulated droughts and floods of water bodies. The scaling exponent
of these power laws, which is named as a fractal dimension, indicates the rate of variation of areas
of regions of change of water bodies over varying levels of drought/flood. The identified regions of change
are employed to compute two fundamental complexity measures of the simulated droughts and floods of
water bodies; average area and average uncertainty. It is observed that simulated droughts have higher
values of average size and average uncertainty as compared to simulated floods, as simulated droughts
diverge from the self organized criticality, while simulated floods converge towards the self organized
criticality.
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