( 3 ) the landscape pattern of kaifeng city were affected by yellow river , such as many no - used land were transformed to farmland land through irrigation diverting water from yellow river , the developing direction of construction land was restricted by yellow river ( 3 )开封城市景观格局深受黄河的影响，如引黄淤灌使的未利用土地转变为耕地，引黄水利建设使的水域面积增加，建设用地受到黄河的影响向北发展受到一定的限制。
