基于Landsat遥感数据武汉地区植被覆盖度动态变化监测分析
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摘要
旨在研究受人类经济活动影响的植被资源及其动态变化趋势的程度,采用基于归一化植被指数的像素二分模型,利用2002—2010年(武汉市每年8月)的卫星遥感数据,对武汉地区6年间的植被覆盖变化进行监测分析。结果表明,植被覆盖度变化与武汉GDP增长率有着紧密联系:2002—2007年,武汉经济较缓慢上升,植被覆盖度基本维持在55%左右;而2007—2008年武汉GDP总值增长率高达26.06%,但随之而来的是植被覆盖度由高峰期的61.68%下降到49.18%,是历年来的最低水准; 2008—2010年经济发展放缓,植被指数有小幅度回升。人类经济活动是影响植被资源的重要因素。
The purpose of this study is to study the extent of vegetation resources affected by the economic activities of human beings and their dynamic trends. Based on the pixel-dichotomy model of the normalized vegetation index,satellite remote sensing data from2002 to 2010( Wuhan,August each year) 6 years of vegetation cover change monitoring analysis. The results show that the change of vegetation coverage is closely related to the growth rate of Wuhan's GDP. From 2002 to 2007,the economic growth of Wuhan was relatively slow,and the vegetation coverage basically remained at about 55%. However,the total GDP growth rate of Wuhan was up to26.06% from 2007 to 2008,but followed by the peak of vegetation coverage the period of 61.68% to 49.18%,is the lowest level over the years,from 2008 to 2010 economic slowdown,the vegetation index rose slightly. Human economic activity is an important factor affecting vegetation resources.
The purpose of this study is to study the extent of vegetation resources affected by the economic activities of human beings and their dynamic trends. Based on the pixel-dichotomy model of the normalized vegetation index,satellite remote sensing data from2002 to 2010( Wuhan,August each year) 6 years of vegetation cover change monitoring analysis. The results show that the change of vegetation coverage is closely related to the growth rate of Wuhan's GDP. From 2002 to 2007,the economic growth of Wuhan was relatively slow,and the vegetation coverage basically remained at about 55%. However,the total GDP growth rate of Wuhan was up to26.06% from 2007 to 2008,but followed by the peak of vegetation coverage the period of 61.68% to 49.18%,is the lowest level over the years,from 2008 to 2010 economic slowdown,the vegetation index rose slightly. Human economic activity is an important factor affecting vegetation resources.
引文
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[3] Lep rieur C,VerstraeteM M,PintyB. Evaluation of the performance ofvarious vegetation indices to retrieve vegetation cover from AVHRRdata[J]. Remote Sensing Review,1994,52(10):21-25.
[4]梅安新,彭望碌,秦其明,等.遥感导论[M].北京:高等教育出版社,2001.
[5]马超飞,马建文,布和敖斯尔. USLE模型中植被覆盖因子的遥感数据定量估算[J].水土保持通报,2001,21(4):6-9.
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