Abstracts for the 6th International GAME Conf.
3-5 December 2004
Kyoto Japan
Rainfall Distribution Pattern Investigation with Unit Disaggregation Curve (UDC) Technique
Tantanee, Sarintip (1), Patamatumkul, Snguan (2), Oki, Taikan (3)
(1) Graduate School, Khon Kaen University
(2) Civil Engineering Department, Khon Kaen University
(3) Hydrology and Water Resources Engineering, Institute of Industrial Science, University of Tokyo
The technique of Unit Disaggregation Curve (UDC) has been developed in this study in order to investigate the pattern of rainfall distribution within a year. The proposed technique is based on the concept of Disaggregation model. UDC is constructed from the historical rainfall records, which have been identified as signal. The data used in the study are the records from 4 stations distributed over Northeastern of Thailand, of which the length of records is at least 50 years. Applying wavelet to those signals, approximations or trend, and details or noise, are separated. The analysis emphasizes on the approximations that apparently demonstrate similar pattern of distribution in each year. The rainfall distribution pattern graphs of each year are recognized from these approximations. The obtained UDC is generated from the representative pattern of rainfall distribution graph within a year. UDC is expressed in the unit curve that is able to apply for any level of annual rainfall. By coupling the signal of details, the further study can be undertaken to develop the new technique of rainfall prediction process.
Submittal Information
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Civil Engineering Department, Naresuan University ,Muang, Phitsanulok 65000 | |
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