TY - JOUR
T1 - Estimation of supplementary water to paddy fields in the lower Mekong River basin during the dry season
AU - Somura, Hiroaki
AU - Tanji, Hajime
AU - Yoshida, Koshi
AU - Toda, Osamu
AU - Higuchi, Katsuhiro
N1 - Funding Information:
Acknowledgments This research was partially supported by two Grants-in-Aid: a Research Revolution 2002 grant from the Ministry of Education, Culture, Sports, Science and Technology; and a Core Research for Evolutional Science and Technology (CREST) grant from the Japan Science and Technology Agency. Moreover, the GIS data set and rainfall data were provided by the MRCS, and the agricultural statistics for Thailand and Laos, which were obtained from the OAE and the MAF, were provided by Dr. Furuya Jun of the Japan International Research Center for Agricultural Sciences (JIRCAS).
PY - 2005/9
Y1 - 2005/9
N2 - Efficient management of water resources in paddy fields requires an understanding of the volume of supplementary water used. However, quantifying the volume is laborious due to the large amount of data that must be collected and analyzed. The purpose of our study was to estimate the volume of supplementary water used in paddy fields, based on several years of available statistical data, and to provide information on how much water can be supplied to paddy fields in each target area. In this study, the lower Mekong River basin of northeast Thailand, Laos, and Cambodia was selected as the study area. In the first step, we used agricultural statistics for each country, rainfall data acquired from the Mekong River Commission Secretariat (MRCS), and the value of virtual water required per unit of rice production. Because several years of data were used for dry season harvested areas and rice production in each country, the supplementary water to paddy fields in each province was calculated using virtual water and rainfall. This method made it possible to estimate changes in supplementary water in each province. Through this study, the supplementary water to paddy fields during the dry season in three countries was approximated from the minimum number of data sets. Moreover, for cases in which it is not possible to procure agricultural water use data for a hydrological model simulation, an alternative solution is proposed.
AB - Efficient management of water resources in paddy fields requires an understanding of the volume of supplementary water used. However, quantifying the volume is laborious due to the large amount of data that must be collected and analyzed. The purpose of our study was to estimate the volume of supplementary water used in paddy fields, based on several years of available statistical data, and to provide information on how much water can be supplied to paddy fields in each target area. In this study, the lower Mekong River basin of northeast Thailand, Laos, and Cambodia was selected as the study area. In the first step, we used agricultural statistics for each country, rainfall data acquired from the Mekong River Commission Secretariat (MRCS), and the value of virtual water required per unit of rice production. Because several years of data were used for dry season harvested areas and rice production in each country, the supplementary water to paddy fields in each province was calculated using virtual water and rainfall. This method made it possible to estimate changes in supplementary water in each province. Through this study, the supplementary water to paddy fields during the dry season in three countries was approximated from the minimum number of data sets. Moreover, for cases in which it is not possible to procure agricultural water use data for a hydrological model simulation, an alternative solution is proposed.
KW - Cambodia
KW - Laos
KW - Monsoon Asia
KW - Rice production
KW - Thailand
KW - Virtual water
KW - Water use
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U2 - 10.1007/s10333-005-0015-5
DO - 10.1007/s10333-005-0015-5
M3 - Article
AN - SCOPUS:27744514401
VL - 3
SP - 177
EP - 186
JO - Paddy and Water Environment
JF - Paddy and Water Environment
SN - 1611-2490
IS - 3
ER -