In the past, Tapo Lake was fed by the Hsinwulu River and natural springs, but now its main sources of water are stream water from the Chinyuan Community and runoff from crop fields upstream.
過去匯集新武呂溪與自然湧泉的大坡池，目前主要的水源為錦園社區的溪水與池上圳的農田灌溉餘水。