Assessment of spatio-temporal vegetation dynamics in tropical arid ecosystem of India using MODIS time-series vegetation indices

Reddy, G P A and Kumar, N and Sahu, N and Srivastava, R and Singh, S K and Naidu, LG K and Chary, G R and Biradar, C M and Gumma, M K and Reddy, B S and Kumar, J N (2020) Assessment of spatio-temporal vegetation dynamics in tropical arid ecosystem of India using MODIS time-series vegetation indices. Arabian Journal of Geosciences (TSI), 13 (15). pp. 1-13. ISSN 1866-7511

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Abstract

In the present study, we analyzed spatio-temporal vegetation dynamics to identify and delineate the vegetation stress zones in tropical arid ecosystem of Anantapuramu district, Andhra Pradesh, India, using Normalized Difference Vegetation Index (NDVI), Vegetation Condition Index (VCI), and Vegetation Anomaly Index (VAI) derived from time-series Moderate Resolution Imaging Spectroradiometer (MODIS) 16-day products (MOD13Q1) at 250 m spatial resolution for the growing season (June to September) of 19 years during 2000 to 2018. The 1-month Standardized Precipitation Index (SPI) was computed for 30 years (1989 to 2018) to quantify the precipitation deficit/surplus regions and assess its influence on vegetation dynamics. The growing season mean NDVI and VCI were correlated with growing season mean 1-month SPI of dry (2003) and wet (2007) years to analyze the spatio-temporal vegetation dynamics. The correlation analysis between SPI and NDVI for dry year (2003) showed strong positive correlation (r = 0.89). Analysis of VAI for dry year (2003) indicates that the central, western, and southwestern parts of the district reported high vegetation stress with VAI of less than − 2.0. This might be due to the fact that central and south-western parts of the district are more prone to droughts than the other parts of the district. The correlation analysis of SPI, NDVI, and VCI distinctly shows the impact of rainfall on vegetation dynamics. The study clearly demonstrates the robustness of NDVI, VCI, and VAI derived from time-series MODIS data in monitoring the spatio-temporal vegetation dynamics and delineate vegetation stress zones in tropical arid ecosystem of India.

Item Type:	Article
Divisions:	Research Program : Innovation Systems for the Drylands (ISD)
CRP:	UNSPECIFIED
Uncontrolled Keywords:	SPI, MODIS, NDVI, VCI, VAI, Vegetation stress zones, Tropical arid ecosystem
Subjects:	Others > GIS Techniques/Remote Sensing Others > Semi-Arid Tropics
Depositing User:	Mr Arun S
Date Deposited:	08 Aug 2020 11:16
Last Modified:	08 Aug 2020 11:16
URI:	http://oar.icrisat.org/id/eprint/11542
Official URL:	https://doi.org/10.1007/s12517-020-05611-4
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	We acknowledge the US Geological Survey (USGS) for providing the temporal MODIS 250m products (https://earthexplorer.usgs.gov/) through the Earth Explorer Data Gateway. The authors are thankful to all India Coordinated Research Project for Dryland Agriculture (CRIDA), Anantapuramu and Minor Irrigation, Department of Command Area Development, Anantapuramu, for their support in providing the climatic data for the study area. The support of Shri K.C.Arun Kumar, Young Professional—II in data processing and GIS mapping is duly acknowledged. We sincerely thank anonymous reviewers whose constructive comments and suggestions greatly improved the manuscript.
Links:	Google Scholar

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