《水经注·卷九》
水又往东北流，经过榆阳城北面。汉武帝把这里封给太常江德，立为侯国。
其水又东北径榆阳城北，汉武帝封太常江德为侯国。
The water flowed northeast again, passing north of Yuyang city. Emperor Wu of Han enfeoffed Tai Chang Jiangde here, establishing a principality.