Chinese Journal of Agrometeorology

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Analysis of Forest Resources Changes and Effectiveness of Aerial Seeding in Xianyang City Based on GIS and RS

XU Jun-chang1,2,WEI Hai-yan1,WANG Yong2,ZHAO Yi-bing2,Shang Xiao-ning3,Dong Xiao-wen2(1.College of Tourism and Environment,Shaanxi Normal University,Xi'an 710062,China;2.Xianyang Meteorological Bureau,Xianyang 712000,China;3.Institute of Agro-meteorological Science of Xianyang City,Xianyang 712000,China)   

  • Online:2008-08-10 Published:2008-08-10

Abstract: Changes of forest resources in Xianyang City in recent 20 years and the effectiveness of aerial seeding in Xianyang City since 1992 were analyzed by using TM images of 1988,CBERS images of 2007 and NOAA AVHRR NDVI data from 1988 to 2007,based on the GIS and RS.The results showed that the forest coverage rate in Xianyang City had been significantly improved,after many years' artificial forestation,closing hillsides to facilitate forestation,and returning farmland to forests.The changes of forest types in the district of aerial seeding had a strong correlation with aerial seeding,and the NDVI value of main areas of aerial seeding had uptrend as a whole.The aerial seeding had a great effect on improving forest cover in Xianyang City.

Key words: Changes of forest resources, Changes of forest resources, Aerial seeding, Analysis of effectiveness, NDVI