There are various small streams, including the Tongch'ŏn (동천), Songgyech'ŏn (송계천), and Namch'ŏn (남천). These are used to transport cut lumber; and the Namch'ŏn is also used to generate hydroelectric power.
There are several small streams, such as the Tongch'ŏn (동천), Songgyech'ŏn (송계천), and Namch'ŏn (남천). These serve to transport sawed timber; and the Namch'ŏn is also used for generating hydroelectric power.