鍏抽敭璇�: 杈芥渤鍙ｆ箍鍦�, 鎵╁紶寮哄害, 绌洪棿鍙戝睍, 褰㈡�佹紨鍙�, Landsat

Abstract:

Using Landsat remote sensing images from 1980锛� 1990锛� 2000锛� 2010 and 2020 as data sources锛� combined with field measurements and Google Earth's high-resolution images锛� we obtained the land cover changes of Liaohekou National Nature Reserve from 1980 to 2020 by using the object-oriented decision tree classification method. The spatial and temporal dynamics of the artificial types of land in the Liaohekou National Nature Reserve in the past 40 years were studied by combining the land use transfer matrix锛� landscape pattern analysis and equal sector orientation analysis. The results show that the natural wetlands in the study area decreased by 270.12 km² between 1980 and 2020锛� and were mainly transformed into artificial land cover types such as arable land锛� oil wells锛� construction land and transportation land. Due to the large disturbance by human activities锛� the landscape in the study area tends to be fragmented and balanced锛� and the landscape heterogeneity is reduced. In the past 40 years锛� the artificial land cover types in the study area have expanded mainly along the north-northwest direction. National policies and economic factors have greatly influenced the evolution of wetlands in the Liaohe estuary锛� and human activities such as farmland reclamation锛� urban construction锛� oil field development and mariculture are the main driving forces for the evolution of natural wetlands.

Key words: Liaohe Estuary Wetland, Tensile strength, Spatial development, Morphological evolution, Landsat