성균관을 중심으로 서쪽에서 흐르는 물을 서반수, 동쪽에서 흐르는 물을 동반수라고 불렀다고 한다.
It is said that centering around Sungkyunkwan, the water flowing from the west was called Seobansu, and the water flowing from the east was called Dongbansu.