Yangjaecheon starts from Gwanaksan(mountain) in Gwacheon. It flows through Gwacheon street and joins with Makgyecheon. In Seocho District, it joins with Yeouicheon. Makgyecheon and Yeouicheon is a small stream that starts from Cheonggyesan. Finally, it flows through Gangnam District and runs into Tancheon. The total length of Yangjaecheon is 15.6 km. Gwacheon manages 8.4 km, Seocho District manages 3.7 km, and Gangnam District manages 3.5 km. The average width of Yangjaecheon is 6~13 m.