| Guanlan River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | China |
| Subdivision Type2: | Province |
| Subdivision Name2: | Guangdong |
| Subdivision Type3: | Cities |
| Subdivision Name3: | Shenzhen Dongguan |
| Source1 Location: | Da'naoke Hill |
| Source1 Coordinates: | 22.7964°N 114.051°W |
| Mouth Location: | Qiaotou Town |
| Mouth Coordinates: | 23.03°N 114.1095°W |
| Length: | 88km (55miles) |
Guanlan River is a tributary of the Shima River located in both cities of Dongguan and Shenzhen. It is 88km (55miles) long and drains an area of 1249km2. Guanlan River rises in Da'naoke Hill, north of Shenzhen, and flows generally north through Qinghu Village and Guanlan Subdistrict, to Dongguan, then flows north to join Shima River in Yantian Stream, where it feeds into Dong River, about 1km2 near Qiaotou Town .[1]
The river's has five major tributaries, the Dalang Stream, Minzhi Stream, Zhangkengjing Stream, Niuhu Stream, and Baihua Stream .
Across the area, millions of tons of raw life sewage, industrial waste and fertilizer runoff disposal contribute to the severe pollution of the Guanlan River.[2] [3] [4] [5]