Abstract
Rainfall is one of main causes of floods. Monitoring of the rainfall is essential for understanding flood mechanism and early warning. Ground-based rain gauge is a conventional device to measure rainfall amount and considered as a point measurement. Satellite-based rainfall estimates provides complement measurement over wide area having few or even no in situ data. This study evaluates rainfall intensity variation and patterns preceding flood events in Indonesia for the period of 2003-2010 using the GSMaP_MVK satellite-based rainfall product with one hour and 0.1o x 0.1o resolutions and rain gauge station data as a benchmark. The analysed data are 3-hourly average and daily accumulation time steps. The chosen research locations were Medan City, Pekanbaru City, Indragiri Hulu Regency, Samarinda City and Manado City. Graphical comparisons of the GSMaP_MVK with the rain gauge data show discrepancies in capturing rainfall events and intensity. The GSMaP_MVK performs underestimation for the most areas, except Samarinda City, which is overestimated. Short-term period rainfall pattern is the most frequent occurred preceding flood events for the entire study areas which indicate that the areas are more susceptible to flash floods and river overflows. Overall, the GSMaP_MVK product provides promising potentiality for the application of monitoring rainfall conditions preceding flood events over the research locations. Statistical verifications reveal that on average, correlation coefficients are (0.22-0.54) and (0.65-0.83) for 3-hourly and daily scale, respectively. While, probability of rain detections (PODs) are (0.57-0.75) and (0.93-0.99), accordingly.
Highlights
Flood is a prevalent threatening natural disaster in Indonesia and spreading in many places throughout the country
Within the period of 2003-2010, there were about 5,186 flood disaster incidences, which accounted for 45.5% of the total natural disasters (BNPB, 2013)
According to Kidd and Huffman (2011) monitoring and measurement of the rainfall is crucial to our well-being and critical to the application in hydrological and water
Summary
Flood is a prevalent threatening natural disaster in Indonesia and spreading in many places throughout the country. Within the period of 2003-2010, there were about 5,186 flood disaster incidences, which accounted for 45.5% of the total natural disasters (BNPB, 2013). Rainfall is commonly known as one of major factors triggering the flood. Amount of rain falls during certain period of time over the area could determine how fast the flood starts to occur. The study of rainfall is of fundamental importance for understanding flood mechanism and early warning. According to Kidd and Huffman (2011) monitoring and measurement of the rainfall is crucial to our well-being and critical to the application in hydrological and water
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Environment and Geosciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
