Effect of flow and sediment variation on the Yellow River Delta wetland area evolution
Flow and sediment process controlled the formation and evolution of wetlands.They were recognized as significant driving forces of shaping structure and function of wetland ecosystems.In this paper,the dynamic changes were studied about the area,center of gravity and wetland types of delta wetland,based on the remote sensing data of the Yellow River Delta wetland area from 1976 to 2014.The results showed that constructed wetland area had remarkably increased 1000 times.However,natural wetland area had reduced 41.9 ％ with fluctuation during the 40 years.The gravity center of reed,beach-land,culture and salt field wetlands had shifted from northwest to southeast.There were significant difference between south and north of wetland evolution.Northern reed and beach-land areas had a decreasing trend.While reed wetland area showed an increasing trend,and beach-land area firstly increased,then decreased in southern.The results may provide a scientific basis for protection and restoration of the Yellow River Delta wetland ecosystem under the condition of flow and sediment variation.
the Yellow River Deltaflow and sediment variationwetland areawetland center of gravitywetland type
国家科技期刊平台
NSTL
万方数据
维普
