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城市建成区周边草地荒漠化遥监测研究

发表时间:2009-07-31  浏览量:1605  下载量:517
全部作者: 王广军,付梅臣,肖秋平,王增
作者单位: 中国地质大学(北京)土地科学技术学院
摘 要: 以中国北方典型的草原煤矿城市——霍林郭勒市为例,基于多时相遥感影像,研究了城市扩张而导致的城市周边草地荒漠化问题。通过引入BP神经网络模型和光谱混合分解模型,完成了城市建成区信息、荒漠化主要评价指标和荒漠化程度信息的提取,并就城市建成区周边的草地荒漠化时空变化特点进行了分析。研究结果表明:从1987年至2006年的20年间,霍林郭勒市城市扩张明显,由此导致城市周边草地荒漠化加重,特别是重度荒漠化草地在季风的作用下向城市下方发展迅速,并与城市建成区面积显著相关,可将城市建成区面积作为评价城市扩张对周边草地荒漠化影响的重要评价和预测指标之一。
关 键 词: 摄影测量与遥感技术;城市扩张;草地荒漠化;遥感;时空分析
Title: Remote monitoring research grassland desertification around built-up area of the city
Author: WANG Guangjun, FU Meichen, XIAO Qiuping, WANG Zeng
Organization: School of Land Science and Technology, China University of Geosciences (Beijing)
Abstract: This paper presents the spatial extent, magnitude and temporal behavior of grassland desertification caused by urban expansion. The selected test site, Huolinguole city, is a grassland city located in northeast China. A time-series of Landsat TM images covering a period of 20 years (1987~2006) were used. The built-up area of the city, grassland desertification indicators and grassland desertification degree information were extracted based on BP neural network and spectral mixture model, and the spatio-temporal evolution characteristics were analyzed. The results of the studies indicated that there was a significant increase in urban expansion from 1987 to 2006, and the similar trend was observed in the temporal magnitude behavior of the severe grassland desertification around the built-up area of the city; the severe grassland desertification was always in shape of triangle around the built-up area of the city, and developed to the east quickly with the help of monsoon; and there was a positive correlation between the built-up area of the city and the area of severe desertification, so the built-up area of the city could be used as an important assessment and prediction indicator for grassland desertification due to urban expansion.
Key words: photogrammetry and remote sensing; urban expansion; grassland desertification; remote sensing; spatio-temporal analysis
发表期数: 2009年7月第14期
引用格式: 王广军,付梅臣,肖秋平,等. 城市建成区周边草地荒漠化遥监测研究[J]. 中国科技论文在线精品论文,2009,2(14):1463-1468.
 
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