I learned ( In my Natural Resources of China class) that much of the lowlands of China are a delta formed by the Yellow and Yangtze Rivers in China. This is where they do much of their agriculture, because most everywhere else in the country is too mountainous. The Yellow River Delta is a river dominated delta, because of the protection from wave/tidal action provided by Japan and other islands. It is at risk of sea level rise, because much of the sediment supply to the delta is being cut off by the large number of hydroelectric dams on the river, and its tributaries. These often need to be dredged out because there is a lot of sediment in the water-because of the energy and force of the flow. The water comes off of the Tibetan Plateau, and is gravity driven to the ocean. Since the plateau is so high, there is a lot of force in the flow.