Erchong Floodway. The Erchong Floodway (Chinese: ???????????????) is a major flood control channel of the Tamsui River in New Taipei, Taiwan. Description The Erchong Floodway is approximately 7.7 km (4.8 mi) long and between 450 m (1,480 ft) and 700 m (2,300 ft) wide covering an area of about 424 ha (1,050 acres) in the centre of the Taipei metropolitan area. Located on the left bank of the Tamsui River in New Taipei, the floodway passes through the districts of Sanchong, Xinzhuang, Wugu, and Luzhou. Generally following the path of smaller natural tributaries of the Tamsui, the Erchong Floodway is separated by as much as 3.5 km (2.2 mi) from the main course of the Tamsui. In addition to its importance in flood control measures, the Erchong Floodway provides significant recreation and conservation functions. A network of urban parks, trails, greenspace, and leisure facilities within the floodway includes the New Taipei...