GeoEco
Vol 12, No 2 (2026): GeoEco July 2026

TEMPORAL VARIATION OF VEGETATION INDEX RELATED TO PRECIPITATION DYNAMICS IN FORESTED AREA OF BOJONEGORO REGENCY

Heri Mulyanti (Department of Environmental Science, Faculty of Science and Engineering, Universitas Bojonegoro, Bojonegoro)
Oktavianus Cahya Anggara (Department of Environmental Science, Faculty of Science and Engineering, Universitas Bojonegoro, Bojonegoro)
Bagus Saputra (Department of Environmental Science, Faculty of Science and Engineering, Universitas Bojonegoro, Bojonegoro)
Nabila Nalalizza (Department of Environmental Science, Faculty of Science and Engineering, Universitas Bojonegoro, Bojonegoro)
Eka Luluk Fitriani (Department of Environmental Science, Faculty of Science and Engineering, Universitas Bojonegoro, Bojonegoro)



Article Info

Publish Date
10 Jul 2026

Abstract

Vegetation dynamics in monsoonal regions are related to climate variability, particularly precipitation. Changes in precipitation may be reflected in vegetation conditions, yet studies on the temporal relationship between NDVI and Rainfall at the regional scale remain limited. This study aims to analyze NDVI dynamics and their relationship with precipitation in Bojonegoro Regency, East Java, during 2001–2023. Using Landsat satellite imagery and CHIRPS precipitation data, the Normalized Difference Vegetation Index (NDVI) was analyzed to evaluate seasonal and interannual vegetation patterns. NDVI values were calculated for April–May and October, representing the end and beginning of the rainy season. Results show that NDVI tends to be higher at the end of the rainy season, with a median value of 0.365, compared to 0.254 at the beginning. The highest NDVI was recorded in 2021, with a median of 0.596. Forested areas demonstrated greater resilience to climate variability than croplands or degraded land. NDVI and Rainfall exhibited a complex relationship, with significant correlations observed only in 2001 at lags –2, –1, and +2. The lag time responses of NDVI after specified precipitation can be used for forest management and planting. The analysis suggests that detailed assessments using time series data are necessary for a clearer understanding. NDVI alone is insufficient, and field validation is required to confirm satellite-based interpretations. Therefore, planned management required to enhance ecosystem resilience to climate change.

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Journal Info

Abbrev

GeoEco

Publisher

Subject

Earth & Planetary Sciences Education Environmental Science Social Sciences

Description

GeoEco is a journal covering all fields of education and science related to geography and the environment. The purpose of writing this journal are to reveal facts, problems and problem solving that can be used as input for Government, institutions, society and individual.The subject matter of the ...