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汪翡翠,汪东川,张利辉,刘金雅,胡炳旭,孙志超,陈俊合.京津冀城市群土地利用生态风险的时空变化分析.生态学报,2018,38(12):4307~4316 本文二维码信息
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京津冀城市群土地利用生态风险的时空变化分析
Spatiotemporal analysis of the dynamic changes in land use ecological risks in the urban agglomeration of Beijing-Tianjin-Hebei vegion
投稿时间:2018-01-30  修订日期:2018-04-25
DOI: 10.5846/stxb201801300246
关键词京津冀城市群  土地利用  景观指数  生态风险评价  重心转移
Key WordsBeijing-Tianjin-Hebei vegion  land use  landscape index  ecological risk assessment  center of gravity shift
基金项目国家重点研发计划课题(2016YFC0503001)
作者单位E-mail
汪翡翠 天津城建大学, 地质与测绘学院, 天津 300384  
汪东川 天津城建大学, 地质与测绘学院, 天津 300384
天津城建大学, 天津市土木建筑结构防护与加固重点实验室, 天津 300384 
mrwangdc@126.com 
张利辉 天津城建大学, 地质与测绘学院, 天津 300384  
刘金雅 天津城建大学, 地质与测绘学院, 天津 300384  
胡炳旭 天津城建大学, 地质与测绘学院, 天津 300384  
孙志超 天津城建大学, 地质与测绘学院, 天津 300384  
陈俊合 天津城建大学, 地质与测绘学院, 天津 300384  
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摘要:
以京津冀城市群为研究区,基于1984、1990、2000、2005、2010和2015年土地利用数据,利用斑块密度、蔓延度和土地利用类型的主观权重构建土地利用生态风险指数,从而揭示京津冀城市群地区6个时间节点的土地利用生态风险空间分布特征。土地利用生态风险划分为5个等级:低风险区、较低风险区、中等风险区、较高风险区和高风险区,将较高风险区和高风险区定义为综合高风险区,然后计算其重心转移轨迹,从而探究土地利用生态综合高风险区的空间转移动态变化规律。结果表明在研究时段内:(1)研究区土地利用生态风险的总体分布规律为城市中心城区周边的土地利用生态风险逐渐加剧,非城市地区低于城市地区,且高风险区、较高风险区的面积呈增加趋势。(2)京津冀城市群13个地级市综合高风险区变化各不相同:北京市、天津市、唐山市和廊坊市的综合高风险区呈现出增加的趋势;承德市、张家口市、保定市、石家庄市、秦皇岛市、邯郸市和邢台市的综合高风险呈现出降低的趋势;而沧州市和衡水市几乎不变。(3)综合高风险区的重心转移方向基本分为三类:朝首都方向、朝东部海洋方向和自身发展方向,且重心转移方向与城市的规划、治理及发展方向联系密切。
Abstract:
In this study, the patch density, contagion degree and subjective weight of land use type were combined to construct an ecological risk index of land use for the Beijing-Tianjin-Hebei vegion based on the land use data from 1984, 1990, 2000, 2005, 2010, and 2015. The results revealed the Beijing-Tianjin-Hebei spatial distribution characteristics of land use ecological risks for six nodes of urban agglomeration. Land use ecological risks were divided into five levels: low risk area, low medium risk area, medium risk area, medium high risk area, and high risk area. The medium high and high risk areas were defined as the comprehensive high risk areas, and then their centers of gravity were calculated. Transfer trajectories were used to explore the dynamic changes in spatial transfer dynamics for high risk land use. The following results were found for the study period. (1) Based on the overall distribution pattern of ecological risks of land use in the study area, the ecological risks from land use around the urban center area have gradually intensified, non-urban areas are lower than the urban areas, and high risk and medium high risk areas are increasing in size. (2) The comprehensive high risk areas in the cities of the Beijing-Tianjin-Hebei vegion are subject to various changes, with Beijing, Tianjin, Tangshan, and Langfang showing an increasing trend, Chengde, Zhangjiakou, Baoding, Shijiazhuang, Qinhuangdao, Handan, and Xingtai showing a decreasing trend, and Cangzhou and Hengshui remaining almost unchanged. (3)The shifting focus of comprehensive high risk areas can be generally divided into three categories: the direction of capital, direction of the eastern sea and its development direction, and shifting direction of the center of gravity closely related to the planning, governance, and development direction of the city.
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