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| SPATIOTEMPORAL DYNAMIC CHANGE ANALYSIS OF LAND USE IN EASTERN SONGNEN PLAIN |
| YANG Jia-jia1, ZHANG Yi-he1,2, FENG Yu-lin1, GAO Tie1,2, XIAO Hong-ye1,2, LIU Yang1, YANG Ze1,2, WEI Ming-hui1,2, ZHANG Zhe-huan1,2 |
1. Shenyang Center of China Geological Survey, Shenyang 110034, China;
2. Key Laboratory of Black Land Evolution and Ecological Effects, CGS, Shenyang 110034, China |
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Abstract Based on the remote sensing monitoring data of land use in 1985, 2000 and 2017, the spatiotemporal variation characteristics and eco-environmental effects of land use transition in eastern Songnen Plain in the past 30 years are analyzed by means of land use transfer matrix, gravity center model and eco-environment quality index. The results show that the land use is mainly cultivated land and forest land with clear distribution boundary during 1985-2015. The land use intensity continues to increase, fast in early stage and slow in later. The main performances of land use transition involve continuous increase of agricultural land, continuous decrease of ecological land and slight increase of construction land, changing drastically in early stage and slowing down in later. The direction of land use transition is generally stable. The shift trajectory of transfer barycenter varies greatly, of which the largest change is during 1985-2000, with the transfer trajectory of water area shifting 76.34 km northwestward. The regional eco-environmental quality index of Songnen Plain continued to decline from 0.395 in 1985 to 0.361 in 2017, indicating the continuous deterioration of eco-environmental quality. In 2017, the spatial distribution is dominated by medium and low-medium quality areas. The mutual transition between agricultural land, grassland and unused land is the main influencing factor of ecological environment quality.
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Received: 11 June 2020
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2020, Vol. 29 
