Research on Vegetation Phenological Change Based upon NDVI in Qinling Area

Abstract:

Currently, NDVI are increasingly used to reflect dynamic changes of vegetation phenology in a wide range. Based on NDVI data in Qinling Area from 1998 to 2009, this paper estimates the start date, end date and time span of the growing season in the study area, using both smooth-moving average method and NDVI mean method. The results show that: (1) NDVI makes good reflection of plant phenology changes in the growing season, also conveys accurately the Growth Recovery Trend and Remote-Sensing Growing Season Elementary Period as an easily accessible parameter. (2) With the arrival of Remote-Sensing Growing Season Elementary Period, NDVI is 0.43. As Sequence Curve reaches the annual peak, when the Phenology ends, NDVI gradually declines to 0.41. (3) When the Active Period of Vegetation Growth advances, end date delays, NDVI in the Active Period has increased.

• Periodical: Applied Mechanics and Materials (Volume 700)
• Pages: 350-359
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.700.350
• Online since: December 2014
• Authors: Hai Peng Feng, Hong Ying Bai*, Xin Ping Ma
• Keywords: NDVI Growing Season, Phenology, Qinling Area

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