|Table of Contents|

Construction of Urban Ecological Security Pattern Based onMCR Model:a Case Study of Pingliang City,Gansu Province(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2021年03期
Page:
54-62
Research Field:
·地理学·
Publishing date:

Info

Title:
Construction of Urban Ecological Security Pattern Based onMCR Model:a Case Study of Pingliang City,Gansu Province
Author(s):
Zhang Yixuan1; 2; 3; 4; Wei Hong1; 2; 3; 4; Na Jiaming1; 2; 3; 4; Ou Weixin5; 6; Lan Jing5; 6; Lu Xiu1; 2; 3; 4
(1.School of Geography,Nanjing Normal University,Nanjing 210023,China)(2.Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,Nanjing 210023,China)(3.Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing 210023,China)(4.State Key Laboratory Cultivation Base of Geographical Environment Evolution(Jiangsu Province),Nanjing 210023,China)(5.College of Land Management,Nanjing Agricultural University,Nanjing 210095,China)(6.State and Local Joint Engineering Research Center of Rural Land Resources Utilization and Consolidation,Nanjing 210095,China)
Keywords:
ecological security pattern; minimum cumulative resistance(MCR)model; ecological source; ecological resistance surface; Pingliang City
PACS:
X826,X321,P901
DOI:
10.3969/j.issn.1001-4616.2021.03.009
Abstract:
The establishment of urban ecological security pattern is of great significance for urban planning of spatial expansion and the health and stability maintaining of regional ecological processes. The ecological security pattern of Pingliang City in Western China is studied based on the minimum cumulative resistance(MCR)model and geographic information spatial analysis. Combined with land use data,this paper divides the ecological source areas by four comprehensive indicators:soil erosion sensitivity,biodiversity maintenance function,water conservation function and soil conservation function. From three aspects of natural factors,economic factors,and social factors,eight resistance factors such as altitude,slope and land use were selected as constraints to establish resistance surface. The MCR model is used to extract the ecological corridor and ecological nodes,generate the ecological security pattern,and conduct optimal protection suggestions. The results show that:firstly,the ecological source of Pingliang City covers 1 049.38 km2,which is 9.44% of the total area,and has a clear spatial agglomeration in distribution. Secondly,the basic framework of ecological security pattern of Pingliang City,including 16 main ecological corridors,25 secondary ecological corridors and 34 ecological nodes,were generated by MCR model. Thirdly,the ecological security pattern of “two ecological barriers,five ecological corridors,three soil and water conservation functional areas and multiple ecological nodes”in the study area was conducted. This study is expected to provide a reference case for the land use improvement and ecological security optimization in the western region of China.

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Last Update: 2021-09-15