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基于地表覆盖分类的生态环境人为干扰度分析——以北京市为例

冯志贤1,2,张继贤3,侯伟4,翟亮4*#br#   

  1. 1兰州交通大学测绘与地理信息学院, 兰州 730070; 2甘肃省地理国情监测工程实验室, 兰州 730070; 3国家测绘产品质量检验测试中心, 北京 100830; 4中国测绘科学研究院, 北京 100830)
  • 出版日期:2017-02-10 发布日期:2017-02-10

Dynamic changes of hemeroby degree based on the land cover classification: A case study in Beijing. 

FENG Zhi-xian1,2, ZHANG Ji-xian3, HOU Wei4, ZHAI Liang4*#br#   

  1. (1Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; 2Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China; 3National Quality Inspection and Testing Center for Surveying and Mapping Products, Beijing 100830, China; 4Chinese Academy of Surveying and Mapping, Beijing 100830, China).
  • Online:2017-02-10 Published:2017-02-10

摘要: 利用北京市2007年和2015年高精度地表覆盖分类数据,结合人为干扰理论构建了基于地表覆盖分类的人为干扰度分级体系,并采用基于面积权重的综合人为干扰指数模型,从行政边界、格网和主体功能区尺度,对北京市地表覆盖的人为干扰程度及其动态变化状况进行了定量分析与评估。结果表明:1)2007—2015年北京市重度干扰类型地表覆盖面积大幅减少,其他干扰类型地表面积均呈增加趋势,其中中度干扰和完全干扰类型地表覆盖面积增加最显著,分别增加1.97%和1.44%;2)人为干扰指数空间分布呈现以太行山脉和燕山山脉为界,山麓以北和西南区域较低,东南地区以及延庆县西南、密云县中部区域较高,并以东城区、西城区为中心向周边扩散的空间格局;3)北京市人为干扰指数总体呈降低趋势,各区县中东城区、西城区、丰台区和朝阳区人为干扰指数较高,怀柔区、门头沟区和密云县人为干扰指数较低,石景山区、大兴区和通州区两期人为干扰指数变化较大,分别达到0.14、-0.15和-0.11;4)北京市各主体功能区的人为干扰指数由高到低依次为:首都核心功能区、城市功能拓展区、城市发展新区、生态涵养发展区和禁止开发区,其中城市发展新区两期人为干扰指数变化较大,其变化值为-0.10。总体上看,2007—2015年各主体功能区的人为干扰指数变化基本符合北京市主体功能区规划。

Abstract: Based on hemeroby theory, this paper used the high precision land cover data to establish a classification system of human disturbance to environment. All land cover types were classified into seven disturbance levels (no human disturbance, weak human disturbance, moderate human disturbance, moderatestrong human disturbance, strong human disturbance, severe human disturbance, and complete human disturbance). Then, Beijing was taken as a test site in this study and its land cover maps in 2007, 2015 were manually extracted from high resolution remote sensing images (spatial resolution better than 2.5 m). An areaweighted hemeroby index (HI) had been adopted for analyzing the dynamic relationship between ecological environment and human activities by using different types of reporting units, i.e. grid cell, administrative-unit, and main functional area. Our results showed that during the period from 2007 to 2015 in Beijing: (1) Area of strong human disturbance decreased by 5.14%; while others hemeroby types of area all increased. Typically, the areas of moderatestrong and complete human disturbance had increased by 1.97% and 1.44%, respectively. (2) The spatial distribution of HI in Beijing showed a diffusion pattern from the city center to its periphery and high HI areas were mostly located in the southeast part of Taihang Mountain. (3) HI index of whole Beijing decreased during this period, but with regional differences, e.g. HI index of Shijiangshan district had increased 0.14, and Daxing and Tongzhou districts had decreased 0.15 and 0.11. (4) The descending order of HI for each main functional area in Beijing was: capital core area, functional urban area, urban developing area, ecological conservation area, and forbidden development area. The HI variations in main functional areas from 2007-2015 were in accordance with the main functional area planning of Beijing.