《水经注·卷五》
河水从前原在褐石注入大海，现在水流经过的地方，已不是大禹时的旧河道了。
河之入海，旧在碣石，今川流所导，非禹渎也。
In the past, the river water flowed into the sea at Brown Stone, but the water now flows through a different channel than the old channel of Emperor Yu's time.