Spatial-temporal variations of land use/cover and its responses to human activity intensity in the Modern Yellow River Delta during 1991-2021
Under the supports of ENVI and ArcGIS software,seven Landsat remote sensing images in July of 1991,1996,2001,2006,2011,2016,and 2021 were selected as data sources to construct landscape type maps of Yellow River Delta.Using the methods of land use dynamic degree,human activity intensity model,and Pearson correlation coefficient,we evaluated the spatial and temporal variations of land use types,human activity intensity,and their relationship in coastal wetlands of the Yellow River Delta in the recent 30 years.The results showed that:(1)There were small fluctuations for the area of the Yellow River Delta in recent 30 years.The annual change rates of natural wetland,artificial wetland,and non-wetland areas were-1.52％,15.17％,and 1.95％,respectively.(2)Land use in the Yellow River Delta changed from single type to diverse types.The largest value(3.28％)of the dynamic degree of synthetic land use appeared during 2011-2016.(3)The equivalent area of construction land and the human activity intensity index of the Yellow River Delta showed an increasing trend in study period.The equivalent area of construction land increased from 212.33 km2 to 501.26 km2,and the human activity intensity index increased from 7.93％to 18.84％in recent 30 years.(4)The spatial-temporal pattern of land use/cover change was consistent,synchronized,and significantly correlated with human activity intensity,suggesting that human activity was closely related to land use change in the study area.
land use/cover changehuman activity intensityModern Yellow River Deltacoastal wetland
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