Urban area vegetation changing assessment over the last 20 years based on NDVI
To assess land change around Lome urban and periurban areas, the logical technique of RGB-NDVI associated to unsupcrvised classification was applied to three satellite images of different dates. The normalized difference vegetation index (NDVI) was computed for the three images to define high and low vegetation biomass. Then colour composites were generated by combining each date of NDVI with either the red, green and blue (RGB) image layers in an image. The output of the classified image was interpreted by the means of additive colour to detect biomass change (vegetation reduction and regeneration) across the landscape on the multitemporal NDVI classified colour composite. The analysis results show that, in a whole, there was a great change in land resources, especially between 1986 and 2001.The landscape dynamics, such us biomass degradation or restoration is more visible between 2001 and 2007.Althoug there was a small area so far well conserved, it remains under urbanization high pressure.
NDVI Land change Biomass, Lome
Folega Fousseni Huang H. Guo Zhao X. Hai Jean L.Seburanga Seyf-laye Alfa-Sika Mande
The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry Univ Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geoscienc
国际会议
2011 International Conference on Future Environment and Energy(ICFEE 2011)(2011年未来环境与能源大会)
三亚
英文
32-35
2011-03-25（万方平台首次上网日期，不代表论文的发表时间）