EFFECT OF SEASONAL RAINFALL ON VEGETATION DYNAMICS IN KARBI ANGLONG DISTRICT OF ASSAM: A GEO SPATIAL STUDY

Abstract

Productivity of vegetation in Karbi Anglong district is mainly dependent on climatic parameters like rainfall and temperature of the region. The Normalized Difference Vegetation Index (NDVI) has been the most commonly used index in vegetation dynamics. The growth and distribution of natural vegetation were significantly affected by rainfall. This study focuses on the relationship between NDVI and rainfall in Karbi Anglong district. Another objective of this paper is to study about the vegetation dynamics of the study area using NDVI. The NDVI values were computed from LANDSAT 5 (TM) and LANDSAT 8 (OLI) satellites and rainfall data were collected from website of IMD. Correlation-coefficients between NDVI and rainfall have been calculated with the help of MS Excel. In the study area there exist strong positive relation between rainfall and NDVI. In Karbi Anglong district vegetation degradation are mainly caused by human induction.