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>A NEW APPROACH OF OPERATION FOR THE BHUMIBOL RESERVOIR IN THE CAHOPHRAYA BASIN, THAILAND BASED ON THE OBSERVED ACCUMULATED AREAL MEAN RAINFALL
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A NEW APPROACH OF OPERATION FOR THE BHUMIBOL RESERVOIR IN THE CAHOPHRAYA BASIN, THAILAND BASED ON THE OBSERVED ACCUMULATED AREAL MEAN RAINFALL
In 2011, massive floods occurred in the Chao Phraya River basin (CPRB) in Thailand. This affected both Thai socio-economics and the global industrial production supply-chain. There is also a risk of droughts in the CPRB during the dry season. The CPRB has two multi-purpose, large-scale reservoirs: the Bhumibol and Sirikit reservoirs. The aim of this study was to develop a science-based reservoir operation system that can easily be put into practice. To accomplish this aim, we studied the optimum operation of these two reservoirs. On the basis of our observations, we propose a new reservoir operation method for reducing the risk of droughts and floods. This method was developed and validated with the aid of historical hydro-logical and rainfall data. The volume of water to be released is determined by the accumulated daily rainfall data, daily inflow data, and storage volume. The reservoir operation method proposed provides better sta-bilization between the reservoir’s water discharge and storage volume. This reduces the risk of drought and allows for water discharge without increasing the risk of flooding in the lower section of the basin.
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