Chikara OGURA1,2*, Somsak SUKCHAN3 and Hajime NARIOKA4
1 Crop Production and Environment Division, Japan International Research Center for Agricultural
Sciences (JIRCAS) (Tsukuba, Ibaraki 305–8686, Japan)
3 Land Development Department (Mittraparp Rd., Khon Kean 40000, Thailand)
4 Graduate School of Bioresources, Mie University (Tsu, Mie 514–8507, Japan)
Abstract1 Crop Production and Environment Division, Japan International Research Center for Agricultural
Sciences (JIRCAS) (Tsukuba, Ibaraki 305–8686, Japan)
3 Land Development Department (Mittraparp Rd., Khon Kean 40000, Thailand)
4 Graduate School of Bioresources, Mie University (Tsu, Mie 514–8507, Japan)
From the results of observations in Nong Saeng Village, Khon Kaen Province, Northeast Thailand from May 2002 to February 2005, precipitation was concentrated from evening to early morning in the middle of the rainy season. However, at the end of the rainy season, the concentration of precipitation during these hours decreased and the precipitation ratio in the morning increased. Extraordinary precipitation in the dry season had the same tendency as at the end of the rainy season. The frequency of gusty rain against all rain was lower than the frequency of the previous and following month during the middle of the rainy season. These results are a reference for development of water control systems and erosion control with cropping systems that are adjusted for precipitation patterns.
Discipline: Watershed and regional resources management
Additional key words: farmland conservation, water resource, watershed
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