Rende Detention Basin, Stormwater management facility in Rende Village, Taiwan

Rende Detention Basin is a stormwater management facility in Rende Village with a circular design that channels water during heavy rainfall. The structure includes multiple drainage passages to guide and store water flow across the site.

The basin occupies part of the former Jiyu Pond, a low-lying area of the Sanye River watershed, where flat drainage slopes and riverside development limits made flooding frequent. The Sixth River Management Office of the Water Resources Agency built it for NT$77 million, and it opened in 2013, later passing to the Tainan City Government. In 2015 the city signed an adoption agreement with Chung Hwa University of Medical Technology, and in 2020–2021 a NT$40 million landscape project added a lakeside trail and water-purification facilities.

In 2015 the city signed an adoption agreement with Chung Hwa University of Medical Technology, which planted about 500 pink trumpet trees around the basin; they bloom each March and April. On 8 November 2015 the university held a creative rowing contest here and named the basin "Hua Yi Lake" for its 47th anniversary. In September of the same year its president and students released over 1,200 guppies, mosquitofish, tilapia and catfish to help control dengue mosquitoes.

The facility is best viewed after rainfall or during wet periods when water actively flows through the channels. The site is visible from the perimeter and can be observed on foot, though interior access is not arranged for general visitors.

The basin's south pool alone can hold about 496,600 cubic metres of floodwater from the Sanye River, cutting its peak flow by 40 cms; the north pool adds 133,600 cubic metres from the Tukuzih drain. Water enters by natural overflow and leaves through automatic gates, and a deep channel in the floor keeps some water present even when no flood is stored.