《明史·志·卷六十三》
侯于赵勘测上奏洳河事宜： 从泉河口到大河口五百三十里以内，从直河到清河三百多里，不依赖洳河，其事现在可以停止。
于赵勘上泇河事宜： 自泉河口至大河口五百三十里内，自直河至清河三百馀里，无赖於泇，事在可已。
Hou Yuzhao surveyed and reported the Ruohe River's affairs: Within 530 miles from the spring river mouth to the river mouth, from the straight river to the clear river for more than 300 miles, without relying on the Ruohe River, the action can be stopped now.