Renyitan Reservoir is located Bazhang River upstream, Fanlu Township, Chiayi County. Its catchment area of 3.66 square kilometers, with a crest length of 1535 meters,the width of 9 meters, the annual water supply is 52 million tons. Was built in April 1980. The reservoir completed in June 1987,and began filling with water. It the largest supply of water in Chiayi area about 500,000 population Renyitan Reservoir supply drinking water in Chiayi, near lake water color, scenic, full of greenery, Lake Crescent, a well-planned dike trail, often visible valentine's walk in here. Also have a lot of tourists walking in early morning evening and sports, kite flying, jogging, dog-walkers...etc, here is a leisure destination of the popular holiday in Chiayi.