Kuraji Koichiro1, Mie Gomyo1 and Kowit Punyatrong2
1Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
2National Parks, Wildlife and Plant Conservation Department, Thailand
1Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
2National Parks, Wildlife and Plant Conservation Department, Thailand
Abstract
To understand the inter-annual and spatial variation of altitudinal increase in rainfall amount, duration and intensity over Doi (Mount) Inthanon and Mae Chaem Watershed, Northern Thailand, we have conducted rainfall observations in this area since 1997. Ten years of continuous data for 18 rain gauge stations were accumulated. Altitudinal increases in rainfall were observed for all nine years. Annual rainfall hours also had an altitudinal increase, whereas mean rainfall intensity had no clear altitudinal increase for the nine year period. Not only altitudinal rainfall increase but also interannual rainfall fluctuation was determined from the variations of rainfall hours. There was no difference in the intensity of altitudinal increases in rainfall between the western and eastern slopes of Doi Inthanon.
KEYWORDS Rainfall; Altitudinal increase; Interannual variation; Mae Chaem Watershed; Doi Inthanon
To understand the inter-annual and spatial variation of altitudinal increase in rainfall amount, duration and intensity over Doi (Mount) Inthanon and Mae Chaem Watershed, Northern Thailand, we have conducted rainfall observations in this area since 1997. Ten years of continuous data for 18 rain gauge stations were accumulated. Altitudinal increases in rainfall were observed for all nine years. Annual rainfall hours also had an altitudinal increase, whereas mean rainfall intensity had no clear altitudinal increase for the nine year period. Not only altitudinal rainfall increase but also interannual rainfall fluctuation was determined from the variations of rainfall hours. There was no difference in the intensity of altitudinal increases in rainfall between the western and eastern slopes of Doi Inthanon.
KEYWORDS Rainfall; Altitudinal increase; Interannual variation; Mae Chaem Watershed; Doi Inthanon
สืบค้นข้อมูลเพิ่มเติม: Hydrological Research Letters 3, 18-21 (2009) Published online in J-STAGE (www.jstage.jst.go.jp/browse/HRL). DOI:10.3178/HRL.3.18
