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[1]CHEN Yong,RUAN Jinghua,WANG Qiaozhi,et al.Expansion of Construction Land and Its Ecological Effect Based on Three-Dimension Information in Daye[J].Research of Soil and Water Conservation,2019,26(05):346-352.

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Expansion of Construction Land and Its Ecological Effect Based on Three-Dimension Information in Daye

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 346-352 Column: Public date: 2019-09-06

Title:: Expansion of Construction Land and Its Ecological Effect Based on Three-Dimension Information in Daye

Author(s):: CHEN Yong^1,2, RUAN Jinghua¹, WANG Qiaozhi^1,2, XIAO Xiao¹, ZENG Xiangyang^1,2; 1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic mineral Resources, Wuhan 430081, China

Keywords:: spatial pattern change; expansion mode; ecological effect; three-dimension information

CLC:: K903

DOI:: -

Abstract:: Topographic fluctuations widely affect the patterns, processes and dynamics of landscape ecology. Based on remote sensing images and DEM data the topographic fluctuation and slope, Daye City was divided into four types of landform:flats, gentle hills, steep hills and low mountains. This paper considered the effects of three-dimensional terrain on ecosystem services from the topographic fluctuation and aspect, established a three-dimensional ecosystem service value estimation model, and introduced 3-D landscape pattern index to discuss the expansion of construction land and its ecological effects. The results show that:(1) from 1995 to 2015, the expansion of construction land in Daye City accelerated gradually, the expansion in flat and gentle hill areas was strong, and the extension mode occupied a dominant position, while the expansion in steep hills and low mountain areas was relatively slow, and the expansion, infilling and isolation modes show a three-pillar situation; (2) from 1995 to 2015, the total loss of ecological service value caused by the construction land expansion in Daye City was 375.256 million yuan, and the total loss in flat and gentle hill was large because of the large occupation of land, but the cost of unit occupation land in gentle hill and low mountain areas was higher; (3) from the change of 3-D landscape pattern index in 1995, 2005 and 2015, construction land expansion in Daye City hasd led to the continuous increase of landscape fragmentation in the whole region; in flat and gentle hills, the connectivity between new construction land and existing construction land was improving, but the landscape balance of flat began to weaken in the later stage, while the landscape balance of gentle hill continued to enhance; in steep hills and low mountain, the aggregation of new construction land was low, and the dominant position of forest land began to weaken.

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