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基于栅格尺度的北京市密云县生态环境脆弱性评价(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年01期
Page:
96-102
Column:
研究论文
publishdate:
2017-01-31

Article Info:/Info

Title:
Assessing ecological and environmental vulnerability of Miyun County in Beijing according to pixel scale
Article ID:
1000-2006(2017)01-0096-07
Author(s):
MAO Xuegang WANG Hang
College of Forestry, Northeast Forestry University, Harbin 150040, China
Keywords:
ecological and environmental vulnerability ecological restoration pixel scale fuzzy evaluation
Classification number :
S826
DOI:
10.3969/j.issn.1000-2006.2017.01.015
Document Code:
A
Abstract:
【Objective】In order to quantitatively evaluate the dynamic changes of ecological vulnerability in Miyun County of Beijing City.【Method】By using remote sensing(RS)and geographic information system(GIS)technology to preprocess 12 kinds of grid data from two aspects of natural environment and social data, a spatial database for the ecological environment quality evaluation index with a spatial resolution of 30 m was established. Based on the sensitivity-elasticity-pressure model, a multi-level fuzzy comprehensive method coupled with a natural boundary method was used to assess the ecological environment vulnerability of Miyun County through dividing the vulnerability into five grades. Further, the spatio temporal variations of vulnerability were analyzed based on transfer matrix method, followed by a validation using vegetation coverage data collected from filed investigation. 【Result】For ecological environment quality in 2003-2013, the northern mountainous area was better than that of the southern plains, and forest region with a higher altitude was better than that of the low altitude farming area. The area proportion of moderate vulnerable area in the study region in 2003 was the largest, followed by the slight vulnerable area, with an area ratio of 40.43% and 37.00%, respectively. The sum of area percentage of slight vulnerable area and low vulnerable area in the study region reached 76.52% in 2013, absolutely showing a dominance of improvement trend. 【Conclusion】After a 10-year’s construction of a series of ecological and environmental protection projects such as natural forest protection project, as well as implementation of environmental protection policy, the ecological environment quality of Miyun County has been greatly improved. The evaluate method based on the sensitivity-elasticity-pressure model could be applied to evaluate the ecological vulnerability at Province, District and County scale.

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Last Update: 2017-01-30