Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (8): 54-60.doi: 10.13474/j.cnki.11-2246.2022.0232

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The response of urban and rural ecological quality to the expansion of construction land in rapid economic growth zone: taking Hefei as an enample

WANG Jian1,2,3, SU Tao1,2,3, ZHU Fei1,2,3, XIA Jun1,2,3, LIAO Jinyi1,2,3   

  1. 1. School of Spatial Informatics and Geomatics Engineering, Anhui University of Science and Technology, Huainan 232001, China;
    2. Key Laboratory of Aviation-aerospace-ground Cooperative Monitoring and Early Warning of Coal Mining-induced Disasters of Anhui Higher Education Institutes, Anhui University of Science and Technology, Huainan 232001, China;
    3. Coal Industry Engineering Research Center of Mining Area Environmental and Disaster Cooperative Monitoring, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2021-11-23 Published:2022-09-01

Abstract: Since the 21st century, China's economic growth has promoted the rapid development of urbanization, but also brings a series of environmental problems to a certain extent. Taking Hefei in Anhui province, one of the fast economic-developing in the Yangtze River Delta region, as a study area, based on Landsat images of 2002, 2010 and 2020, this paper discusses the response of urban and rural ecological changes to the expansion of construction land by using improved remote sensing ecological index and introducing urban expansion intensity and urban center of gravity center displacement model. The results show that: From 2002 to 2020, the ecological environment quality of the main urban area and surrounding towns of Hefei show a general deteriorating trend. The average MRSEI of surrounding towns decreases from 0.747 in 2002 to 0.495 in 2020, a decrease of 33.7%. The average MRSEI of the main urban area decreases from 0.669 in 2002 to 0.491 in 2020, a decrease of 28.73%. The decline in the ecological quality of surrounding towns is higher than that of the main urban area, the expansion of construction land is stronger than that of the main urban area, and the ecological damage is more serious. The deteriorating ecological environment is mainly distributed radially from the main urban area to the surrounding towns. The areas with improved ecological environment are mainly distributed around the old urban area. The areas of urban expansion and the deteriorating ecological environment shown by the MRSEI evaluation results basically coincide, and the ecological environment changes have a obviously negative correlation with the expansion intensity of urban construction land.

Key words: construction land expansion, MRSEI, ecological quality, Hefei, extension strength

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