TEMPORAL VARIATIONS OF NDVI WITH RESPONSES TO CLIMATE CHANGE IN MAYURBHANJ DISTRICT OF ODISHA FROM 2015-2020

Tóm tắt

The study aims to calculate the Normalized Difference Vegetation Index (NDVI) in the Mayurbhanj District of Odisha, analyze the temporal changes in the Normalized Difference Vegetation Index (NDVI) of the study area, and examine the effects or impacts of vegetation change on the environment. The Normalized Difference Vegetation Index (NDVI) values of four different seasons in January, April, July, and October for the years 2015,2016,2017,2018, and 2019 were compared to the NDVIs values of January, April, July, and October for the year 2020 respectively. The changes in vegetation pixel areas were calculated using the raster calculation tool. Analyzing the database of these 6 years, it was found that, the highest significant loss was found in July 2016 at 3381.3 ha. and the lowest at 43.2 in October 2018. The loss was maximum in October 2018 at 3683.7 ha. and lowest in July 2017 at 960.3 ha. No change in vegetation category was highest in the year 2017, October of 3855.6 ha. and lowest in the year 2018, July of 1065.6 ha. In the year 2017, July had the highest gain in the vegetation of 3154.5 ha., the maximum whereas the lowest gain in October 2017 was at 1248.3 ha. The significant gain was maximum in the year 2017, April of 1775.7 ha. and a minimum of 3.6 ha. in October 2016. The year 2015 and 2019 had no more effect on vegetation changes whereas the year 2016-2018 was severely affected by a change in vegetation and they have a huge effect on the environment of Mayurbhanj.