The coarse sand area located in the middle reaches of the Yellow river is the main source area which produces the most amount of the deposited sediment in the riverbed of the Yellow river.

• 摘要黄河中游多沙粗沙区是黄河中下游淤积泥沙的主要来源区，所以研究多沙粗沙区的土地利用与覆盖变化具有重要的现实意义。