Space-Time Dynamics of Vegetable Coverage in the Intermediary Geographical Region of Ilhéus-Itabuna

de Jesus, Andrêssa Pereira; Michel, Roberto Ferreira Machado

doi:10.1590/2179-8087-FLORAM-2024-0009

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ORIGINAL ARTICLE • Floresta Ambient. 31 (3) • 2024 • https://doi.org/10.1590/2179-8087-FLORAM-2024-0009 copy

Space-Time Dynamics of Vegetable Coverage in the Intermediary Geographical Region of Ilhéus-Itabuna

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this study is to evaluate changes in vegetation cover in the Ilhéus-Itabuna geographic intermediate region from 1984 to 2019 using the Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), and Soil-Adjusted Vegetation Index (SAVI). Data was processed through the Google Earth Engine programming interface, using image collections from the TM/Landsat 5 and OLI/Landsat 8 sensors. After creating the indices, areas with different uses were selected, and the NDVI time series graphs were created. It was found that the vegetation density in the region decreased from 1984 to 1999 and increased from that year. The NDVI and EVI showed similar behavior, unlike the SAVI, which lower averages. Average NDVI values were higher in (June-August), due to the association of these conditions with higher soil moisture. In the pasture area, peaks of heat (January-March) drove vegetative activity due to the favorable climate and availability of water and sunlight.

Keywords:
Temporal analysis; Remote sensing; NDVI; Google earth engine; Urban planning

Regions	SD	%RSD	N° of observations
Agriculture (Jan-Mar)	0.129	24.749	60
Agriculture (Jun-Aug)	0.107	18.113	84
Cacao cabruca (Jan-Mar)	0.148	19.903	103
Cacao cabruca (Jun-Aug)	0.110	13.953	160
Eucalyptus (Jan-Mar)	0.177	26.715	98
Eucalyptus (Jun-Aug)	0.167	25.043	115
Forest (Jan-Mar)	0.235	33.741	117
Forest (Jun-Aug)	0.142	19.150	161
Pasture (Jan-Mar)	0.138	23.341	58
Pasture (Jun-Aug)	0.135	23.730	73

Year	Percentage (%)
Year	Class I	Class II	Class III	Class IV	Class V
1984	0.63	12.23	49.65	37.06	0.43
1989	0.66	10.92	46.15	41.41	0.85
1994	0.68	4.41	42.88	51.45	0.58
1999	0.52	25.89	55.17	18.39	0.03
2004	0.71	6.47	51.24	41.36	0.23
2009	0.54	10.42	56.16	32.76	0.12
2014	0.67	2.88	30.30	58.12	8.03
2019	0.70	1.37	26.94	62.31	8.69

Year	Percentage (%)
Year	Class I	Class II	Class III	Class IV	Class V
1984	0.61	6.73	56.44	33.64	2.57
1989	0.66	10.03	53.91	32.89	2.52
1994	0.67	3.83	53.17	40.02	2.31
1999	0.56	13.41	62.38	22.35	1.30
2004	0.70	4.05	60.03	34.14	1.08
2009	0.53	6.54	59.37	32.05	1.52
2014	0.65	0.66	22.87	61.04	14.78
2019	0.69	0.68	23.06	58.17	17.40

Year	Percentage (%)
Year	Class I	Class II	Class III	Class IV	Class V
1984	0.61	42.37	55.97	1.05	0.00
1989	0.66	40.45	57.76	1.13	0.00
1994	0.67	29.63	68.77	0.94	0.00
1999	0.56	60.39	38.71	0.34	0.00
2004	0.70	36.66	62.28	0.35	0.00
2009	0.53	40.90	58.04	0.53	0.00
2014	0.65	15.45	74.78	9.11	0.00
2019	0.69	10.34	79.71	9.26	0.00

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[1] Andrêssa Pereira de Jesus Universidade Estadual de Santa Cruz, Programa de Pós-graduação em Desenvolvimento Regional e Meio Ambiente, Rod. Jorge Amado, Km 16, CEP 45662-900 , Ilhéus , BA , Brasil . e-mail: andressap0803@gmail.com