Jungnangcheon is a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of Seoul

Seoul

Seoul , officially the Seoul Special City, is the capital and largest metropolis of South Korea. A megacity with a population of over 10 million, it is the largest city proper in the OECD developed world...

's Han River

Han River (Korea)

The Han River is a major river in South Korea and the fourth longest river on the Korean peninsula after the Amnok, Duman, and Nakdong rivers. It is formed by the confluence of the Namhan River , which originates in Mount Daedeok, and the Bukhan River , which originates on the slopes of Mount...

. It is generated in the valley of Dorak Mountain of Yangju

Yangju

Yangju is a city in Gyeonggi Province, South Korea. Yangju is located south of Dongducheon and north of Uijeongbu not far from Seoul.- Attractions:...

, Gyeonggi-do

Gyeonggi-do

Gyeonggi-do is the most populous province in South Korea. The provincial capital is located at Suwon. Seoul—South Korea's largest city and national capital—is located in the heart of the province, but has been separately administered as a provincial-level special city since 1946...

. Cheonggyecheon

Cheonggyecheon

Cheonggyecheon is an 8.4 km long, modern public recreation space in downtown Seoul, South Korea. The massive urban renewal project is on the site of a stream that flowed before the rapid post-war economic development required it to be covered by transportation infrastructure...

 is a tributary of Jungnangcheon.
Its whole river basin extends to 299.9km². Most of the stream is located in Uijeongbu

Uijeongbu

Uijeongbu is a city in Gyeonggi Province, South Korea.The city is located just north of Seoul with many U.S. and Korean military bases for the defense of the Korean capital. The U.S. Second Infantry Division has established its headquarters in the city with main troops deployed in Dongducheon...

 and Seoul.

Recreation

Citizens enjoy jogging and cycling near the river. The cycling track links to other tracks on both the nearby Cheongyecheon stream and the Han river.

Seoul Selection reports that there are some areas alongside the stream where rape flowers are visible in May.

Pollution

Its pollution has been serious because of large deal of pollutants especially from domestic pollution. Experts have pointed out that the pollution originated from the upper reaches of the stream. In summer 2007, more than 200 fish died after a heavy rain. The pollutants at the bottom of riverbed contaminanted the stream after the storm. Citizens called environmental authorities.

Uijeongbu

Uijeongbu

Uijeongbu is a city in Gyeonggi Province, South Korea.The city is located just north of Seoul with many U.S. and Korean military bases for the defense of the Korean capital. The U.S. Second Infantry Division has established its headquarters in the city with main troops deployed in Dongducheon...

city government reported its plan to build more ecologically-friendly sewage disposal plants.

Despite the likelihood that the water is not clean, many people fish in the river downstream from Uijeongbu.