The dam will improve flood control to Kaeng Khoi in Saraburi province and through the Lower Chao Phraya Bas0in, from Ayutthaya to Pathumthani and Nonthaburi provinces and Bangkok Metropolis itself. Originally the Rama0 VI Barrage alone stored or held back floods from the Pa Sak River, as well as from the north and north-east. Now the load can be allocated to the Pa Sak Reservoir - holding back floodwater to reduce risk of crop damage. During the dry season, the released water will help stave off, dilute and drive off sea-water intrusion that often takes croplands out of production.