《旧唐书·本纪·卷十七》
河阳修筑防口堰，征用民工四万，可灌溉济源、河内、温县、武德、武陟等五县的农田五千多顷。
河阳修防口堰，役工四万，溉济源、河内、温县、武德、武陟五县田五千余顷。
He built a weir in Heyang to irrigate the farmland of more than 5,000 hectares in five counties, including Jiyuan, Heyi, Wenxian, Wude and Wuzhi.