NAME =  Kuraji Koichiro  
ORGANIZATION =  University Forest in Aichi, The University of Tokyo  
ADDRESS =  11-44 Goizuka, Seto, Aichi  
COUNTRY =  Japan  
PHONE =  0561-82-2371  
FAX =  0561-85-2838  
E-MAIL =  kuraji@uf.a.u-tokyo.ac.jp  
POSTER_ONLY =  no  
THEME =  T3  
DATE =  09-Aug-04-16:02:37  
ABSID = T3KK09Aug04160237 
TITLE = Six years intensive rainfall observation in Mae Chaem Watershed, Northern Thailand 
AUTHOR_1 = Kuraji Koichiro 
INSTITUTION_1 = University Forest in Aichi, The University of Tokyo 
PRESENTER = AUTHOR_1 
AUTHOR_2 = Kowit Punyatrong 
INSTITUTION_2 = Royal Initiatives and Security Projects Division, National Park Wildlife and Plant Conservation Department 
ABSTRACT = To examine intra-seasonal variation in rainfall in a mountainous watershed under tropical monsoon climate in Thailand, the data obtained by GAME-T rain gauge network for two years in the Mae Chaem watershed, 3,858 km2, were analyzed. Tipping time data from 9 points located from the top of the mountain to the valley bottom were used. It was found that the coefficient of variation in 5-day rainfall among 9 sites was a useful indicator to understand seasonal transition. Using this indicator, rainy season was divided into five regimes i.e. pre-monsoon, early rainy, middle rainy, late rainy and post-monsoon regime. The seasonal transition of the altitudinal increase and the diurnal cycle in rainfall were analyzed using these regimes. It was found that all regimes have their original pattern of the altitudinal increase and diurnal cycle in rainfall.