Índices radiométricos para estimativa de umidade do solo

Penachio, Sara Maciel; Oliveira, Samuel Almeida Santos; Tagliarini, Felipe de Souza Nogueira; Barros, A. L. F. de

doi:10.34117/bjdv6n5-418

Cited by 1 publication

(1 citation statement)

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“…This technique has been advancing considerably in the latest years, enabling the acquisition of more accurate and detailed information, especially to identify and classify targets on earth surface that may facilitate several studies, such as land use mapping, dynamics of vegetation, and superficial waters. (Fernandes et al, 2012;Penachio et al, 2020).…”

Section: Delimitation Of Water Areas Using Remote Sensing In Brazil's...mentioning

confidence: 99%

Delimitation of water areas using remote sensing in Brazil’s semiarid region

Almeida

Araújo

Soares

et al. 2023

Rev. Bras. Ciênc. Ambient.

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Remote sensing techniques are of fundamental importance to investigate the changes occurred in the terrestrial mosaic over the years and contribute to the decision-making by increasing efficient environmental and water management. This article aimed to detect, demarcate and quantify the hydric area of Poço da Cruz reservoir, located in Ibimirim, Pernambuco, semiarid region of Brazil, with modeling based on Landsat 8/OLI satellite multispectral images from 2015 to 2020, and to relate it with data from the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) satellites average rainfall. For this purpose, the Modified Normalized Difference Water Index (MNDWI) was modeled, being produced georeferenced theme maps and extracted only the pixels represented by positive spectral values, which represent water targets. The open-access software Quantum Geographic Information System (QGIS, version 2.18.16) was used for all stages of digital image processing and connection with complementary databases on the theme maps elaboration. In the results, changes in the spatial distribution of Poço da Cruz were evidenced and analyzed using precipitation data from the CHIRPS product, allowing a better understanding of the rainfall behavior in the region and its influence. The MNDWI was lined with the CHIRPS product, in which the spatial correlation between the rainy event and the water area’s delimitation is documented, especially in October 2017 (minimum values) and October 2020 (maximum values).

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Section: Delimitation Of Water Areas Using Remote Sensing In Brazil's...mentioning

confidence: 99%