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[1]YU Zheng-zheng,WU Guo-xi,LIU Liang-yun.Research on Vegetation Coverage Evolution of Mentougou District by Remote Sensing[J].Research of Soil and Water Conservation,2011,18(03):32-35.

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Research on Vegetation Coverage Evolution of Mentougou District by Remote Sensing

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 03 Page number: 32-35 Column: Public date: 2011-06-20

Title:: Research on Vegetation Coverage Evolution of Mentougou District by Remote Sensing

Author(s):: YU Zheng-zheng¹, WU Guo-xi¹, LIU Liang-yun²; 1. College of Urban and Environment, Xuchang University, Xuchang, He’nan 46100, China;
2. Center for Earth Observation and Digital Earth Chinese Academy of Sciences, Beijing 100190, China

Keywords:: remote sensing; vegetation coverage; pixel binary model; spatiotemporal evolution

CLC:: X171.4;TP79

DOI:: -

Abstract:: In this paper,we chose two TM images of 1979 and 2005 as the data source.After boundary fixing,cloud processing,topographic correction,atmospheric radiation correction,and reflection calculation,based on normalized difference vegetation index and improved pixel binary model,we calculated NDVI and vegetation coverage of these two images,and dynamically monitored the vegetation cover changes of Mentougou district in Beijing.The results showed that:(1) the vegetation coverage showed a downward trend,reduced from 76.4% in 1979 to 72.7% in 2005;(2) the area with coverage more than 60% is relatively stable,which is the main area of this district;(3) the area with coverage over 80% was largely decreased,indicating that there was severe damage to vegetation coverage in these area,the reason must be the rapid urbanization,the large-scale land use and the rapid economic growth;(4) Yongding,Longquan,Tanzhesi,these three towns’ vegetation has severe degraded because of the sand mining,quarrying and mining.Junzhuang is the only town whose vegetation coverage increased,the reason is to return farm land to woodland and fruit trees planting.Because of human activities such as mining and quarrying,the vegetation coverage shows a clear degradation of Miaofengshan,Wangping,Datai and Zhaitang,especially the Beijing West Coal Mining Group focus on these four towns.The coverage shows a relatively small degradation,and the natural degradation is dominant in Yanchi and Qingshui.

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