Abstracts for the 6th International GAME Conf.

3-5 December 2004

Kyoto Japan

Pattern of Temporal Daily Rainfall Distribution in Northern River Basin in Thailand

Assoc.Prof. Uruya WEESAKUL, Ph.D. (1)

Pattern of Temporal Daily Rainfall Distribution in Northern River Basin in Thailand Assoc.Prof. Uruya WEESAKUL, Ph.D. Department of Civil Engineering, Faculty of Engineering Thammasat University, Khlong Luang, Pathumthani 12121, THAILAND Email: wuruya@engr.tu.ac.th ABSTRACT Necessity of accurate rainfall forecast increases in many fields of water resources engineering. Daily rainfall forecast is also required for both flood and drought forecast. In this study, an attempt was emphasized firstly on investigation of pattern of temporal daily rainfall distribution and secondly focused on formulation of pattern of temporal distribution in order to be capable of forecasting a series of daily rainfall. Yom river basin, located in the northern region of Thailand, was selected as study area due to its frequent problems of flood and drought. Daily rainfall of 26 rainfall stations, distributed over the basin, were collected and analyzed during 1973 to 2002. It has been found that in one year, generally there are two peaks of rainfall, the first lower one occurs in May and the second higher peak occurs during August to September. Many formulae have been tested and fitted to such temporal distribution. It has been found that the 11 degree polynomial provide the least error compared to other formulae. The formula, proposed in the study, is capable to be applied for estimation of rainfall distribution for planning purpose. However, at this stage, the result of the study is only the first step to formulate pattern of daily rainfall distribution, the next step is to further develop for daily rainfall forecast which will be more useful for engineering practice.

Submittal Information

Name : Date :
    Uruya weesakul
    28-Jul-04-11:02:00
Organization : Theme :
    Thammasart University (Faculty of Science)
    Theme 5
Address : Presentation :
    Khlong Luang, Pathumtani 12121
    Poster or oral
Country : Abstract ID :
    Thailand
    T5Uw28Jul04110200
Phone : Fax :
    661-314-5855
E-mail :
    wuruya@engr.tu.ac.th