The Yellow River is the second longest River in China. Its flow and sediment changes are becoming more complicated, more flexible due to human activities, changeable climate and geogrpahical features. The flow and sediment characteristics may be roughly described as less water with more sediment; different sources of flow and sediment; unbalanced distribution of flow and sediment during the year and great annual fluctuation. Since the 1970s especially in the 1990s, some new variations and changes have been added to flow and sediment features of the Yellow River. Fast growing economic development, pressing situation of supply and demand of water resources, frequent cut-outs in the lower reaches, serios river course deposits and shrinking. All this, we will account for the new variations of flow and sediment of the Yellow River.
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