TREND ANALYSIS OF TEMPORAL VARIATIONS IN EVI WITH RESPECT TO RAINFALL OF JAIPUR DISTRICT

Garima Sharma, Shabeena Zaidi, Rohit Goyal

Abstract: For the protection and restoration of vegetation, it is imperative to comprehend and map current states of its distribution. Vegetation mapping and its quantification helps in understanding and correlating the factors that contribute to its spread cover over different regions. ‘Jaipur city’, also called Pink city is the capital of the state of Rajasthan lying in the semi-arid zone. Irregular and intermittent rainfall and drastic changes in land use and land cover types highly influence vegetation cover in the region. In order to study influence of erratic patterns of rainfall on vegetation, this study analyses the trend followed by the PostMonsoonal vegetation pattern of Jaipur with respect to the monsoonal rainfall in the years 2003 to 2010 with help of remote sensing data. Freely available remotely sensed data of Enhanced Vegetation Index (EVI) from MODIS and rainfall data from water resources department are processed here to exhibit the dependence of natural vegetation distribution in arid and semi-arid regions on rainfall. It is concluded that the EVI value rises with rise in rainfall. Coefficient of correlation value of 0.138 suggests that other factors may also be responsible for variations in EVI than rainfall. It is also concluded that MODIS EVI gives good estimation of seasonal patterns.

Keywords: Enhanced Vegetation Index (EVI), Rainfall, MODIS, Remote Sensing, Geographical Information Systems

DOI: https://doi.org/10.15623/ijret.2016.0501022