The primary objective of the project was to increase irrigation water for 85,424 hectares (about 212,560 acres) of farmland in the Chianan irrigation area. After completion of the project, the annual production of brown rice was increased by 130,000 metric tons and that of sugar by more than 70,000 metric tons.
曾文水庫的主要目標在增加嘉南平原農作區的灌溉，使得稻米每年可增產十三萬公噸、蔗糖可增產七萬公噸以上。