Satellite Rainfall Estimates Validation and Applicability in Disaster Management
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Department of environment science
Abstract
Abstract
Rainfall is variable environmental component. Its measurement and management is vital
for the social welfare. There have been different methods developed for the
measurement of it, from ancient period. Still, there is lack of reliable and real time rainfall
data. The satellite rainfall estimate (SRFE) is emerging as an alternative method for the
real time rainfall data. Many researches have been carried out for the reliability test of
satellite rainfall estimate and different tests have been preformed for the validation of the
satellite rainfall. In this study, Depth Area Duration (DAD) equation was used for the
interpolation of point rainfall into areal rainfall. Then, validation for monthly cumulative
rainfall, seasonal rainall and daily rainfall was perfomed. The monthly SRFE had better
estimations compare to daily rainfall and followed by the monsoon seasonal rainfall. The
daily SRFE can not be used in flood warning mechanism as it has significant errors and
low correlation coefficient.