20 km from the hill-plain junction to the estuary,the lower reach of Xiaolinghe River has developed a series of depositional environments,including pebbely alluvial fan,channel lag,channel bars,floodplain and depressions,salt marshes and open tidal flats,etc.

On the coincidence between the Square Diagram of the Fu Xi s 64 hexagrams and the sectional drawing of the soil in alluvial plain by the Yellow River;