Surface Temperature and Albedo in the Ilha Solteira Region, São Paulo

Gomes, Heliofábio Barros; Cavalcante, Lucas Barbosa; Silva, Rosisberto Salustiano da; Santos, Maurílio Neemias dos

doi:10.4215/rm2017.e16018

Cited by 3 publications

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“…Our surface water temperature data for all reservoirs matches with those collected in situ 71 – 73 as well as in situ measurements of chl-a density for Três Irmãos varying from 0.1 to 5.0 μg/L (X¯: 1.0 μg/L) 47 and for Ilha Solteira 0.4 and 13.8 μg/L (X¯: 4.6 μg/L), 34 indicating the robustness of our remote sensing analysis. In contrast to our data, it is expected that chl-a density starts to increase at the end of fall, after the wet season that is characterized by high precipitation, constant temperature above 30°C and intense fluvial discharge, culminating in higher nutrient inflow 74 .…”

Section: Resultssupporting

confidence: 75%

Spatio-temporal water quality variability and regionalization of tropical reservoirs based on Landsat imagery

Carvalho

Figueira²,

Fortunato³

2023

J. Appl. Rem. Sens.

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Reservoirs are aquatic environments with complex interactions between biochemical and physical components. Many of those parameters can be estimated from remote sensing tools, especially since increasing technological progress allows the analysis of those environments in high spatial and temporal resolutions. This work aimed to analyze the water quality of four reservoirs, with high energy productivity, located in the center-southern region of Brazil from bio-optical and thermal water parameters. Therefore, hundreds of Landsat 5 (TM), 7 (ETM+), and 8 (OLI) satellite images were processed by the Google Earth Engine cloud computing platform to estimate water surface temperature, chlorophyll-a density (chl-a), Secchi depth (SD), and trophic state index (TSI). To calibrate the equations, 11 in situ monitoring points were used in 27 scenes from the TM and ETM+ sensors and 30 from the OLI sensor, within 6 days interval between the monitoring date and the image acquisition. Additionally, records from two weather stations near the reservoirs were analyzed to evaluate meteorological influences on water parameters. SD has influenced TSI in three reservoirs, while chl-a has acted as a proxy in only one. Moderate correlations were observed between air temperature, rainfall, and global radiation and the bio-optical and thermal water parameters. Remote sensing has detected a clear spatio-temporal variation, which allowed regionalizing the reservoirs. Reservoir regionalization based on the mapped parameters may be able not only to visualize the spatial dynamics of the waters but also as a tool for the management of water bodies with multiple users and issues.

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Section: Resultssupporting

confidence: 75%

Spatio-temporal water quality variability and regionalization of tropical reservoirs based on Landsat imagery

Carvalho

Figueira²,

Fortunato³

2023

J. Appl. Rem. Sens.

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Parâmetros Biofísicos Aplicados no Parque Nacional da Serra das Confusões, Piauí-Brasil

Alves

Gomes

Santos

et al. 2020

Rev. bras. meteorol.

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Resumo O objetivo deste trabalho é avaliar os parâmetros biofísicos, chuva e a temperatura de superfície nas condições da vegetação, no Parque Nacional da Serra das Confusões (PNSC), Piauí-NEB. Com auxílio das imagens obtidas do satélite Landsat 8 foi possível calcular o Normalized Difference Vegetation Index (NDVI) e a temperatura de superfície (Ts). A chuva do PNSC apresentou sazonalidade bem definida, estações seca e chuvosa. Ambas as estações têm papel crucial nas condições da vegetação do PNSC. A classe de NDVI (>0,693) apresentou a maior redução da área de cobertura do PNSC próximo de 72,7%, enquanto que as classes (0,347-0,433) e (0,433-0,52) tiveram um aumento de 34,7% e 31,8%, respectivamente. Além disso, ficou claro que as condições da vegetação influenciam na Ts da região.

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Análise do balanço de radiação e energia em áreas de veredas no Norte de Minas Gerais, bioma cerrado

Veloso¹,

Silva²,

Ferreira³

2020

cerrados

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A vereda, típica formação no bioma Cerrado, é reconhecida por sua elevada capacidade de recarga hídrica, em função de uma topografia plana, solos hidromórficos e proximidade de matas de galeria/cursos hidrográficos. Estudos nesses ambientes ainda são escassos, especialmente aqueles voltados para o entendimento da dinâmica do balanço de radiação e energia, relacionado com processos ecológicos e climáticos. O objetivo do trabalho é analisar o comportamento do balanço de energia em ambientes de veredas no Norte de Minas Gerais, em área amostral específica, com técnicas avançadas de sensoriamento remoto, aplicando-se o algoritmo SEBAL (Surface Energy Balance Algorithms for Land). No contexto do balanço de energia, os seguintes valores médios foram obtidos para o inverno e verão, respectivamente: Rn 24 h de 98,71 Wm-2 e 230,95 Wm-2; G de 53,43 Wm-2 e 80,84 Wm-2; H de 26,93 Wm-2 e 88,52 Wm-2; LE de 77,78 Wm-2 e 142,34 Wm-2; e taxa de evapotranspiração de 2,53 mm.d-1 e 5,02 mm.d-1. As técnicas de sensoriamento remoto utilizadas neste estudo foram de grande utilidade para as análises em áreas de vereda, destacando com eficiência o comportamento do balanço de energia e evapotranspiração nesse importante ambiente no Cerrado. Palavras-chave: Savana. Recarga hídrica. Sazonalidade climática. SEBAL. Landsat 8. ANALYSIS OF THE RADIATION AND ENERGY BALANCE IN VEREDAS AREAS IN NORTHERN MINAS GERAIS, CERRADO BIOME ABSTRACT The vereda, typical formation in the Cerrado biome, is recognized for its high-water recharge capacity, due the flat topography, hydromorphic soils and proximity to gallery forests / river courses. Studies in these environments are still scarce, especially those aimed at understanding the dynamics of the radiation and energy balance, related to ecological and climatic processes. The objective of the work is to analyze the energy balance behavior in vereda environments in Northern of Minas Gerais state, in a specific sample area, with advanced remote sensing techniques, applying the SEBAL algorithm (Surface Energy Balance Algorithms for Land). Among the results, it was observed that the behavior of the components of the balance of radiation and energy follow the meteorological and phenological dynamics expected for this phytophysiognomy. In the context of the energy balance, the following average values were obtained, in the winter and summer, respectively: Rn 24 h of 98.71 Wm-2 and 230.95 Wm-2; G of 53.43 Wm-2 and 80.84 Wm-2; H of 26.93 Wm-2 and 88.52 Wm-2; LE of 77.78 Wm-2 and 142.34 Wm-2; and evapotranspiration rate of 2.53 mm.d-1 and 5.02 mm.d-1. The remote sensing techniques used in this study were of great useful for analyzes in veredas, efficiently highlighting the behavior of energy balance and evapotranspiration in this important environment of Cerrado. Keywords: Savanna. Water recharge. Climatic seasonality. SEBAL. Landsat 8. ANÁLISIS DE LA RADIACIÓN Y EL EQUILIBRIO ENERGÉTICO EN LAS ZONAS DE VEREDA EN EL NORTE DE MINAS GERAIS, CERRADO BIOME RESUMEN El Vereda, formación típica en el bioma Cerrado, es reconocido por su alta capacidad de recarga de agua, debido a su topografía plana, suelos hidromórficos y proximidad a bosques de galería / cursos hidrográficos. Los estudios en estos entornos aún son escasos, especialmente aquellos destinados a comprender la dinámica de la radiación y el equilibrio energético, relacionados con los procesos ecológicos y climáticos. El objetivo del trabajo es analizar el comportamiento del equilibrio energético en entornos de senderos en el norte de Minas Gerais, en un área de muestra específica, con técnicas avanzadas de teledetección, aplicando el algoritmo SEBAL (Algoritmos de equilibrio de energía de superficie para tierra). En el contexto del balance energético, se obtuvieron los siguientes valores promedio para invierno y verano, respectivamente: Rn 24 h de 98.71 Wm-2 y 230.95 Wm-2; G de 53,43 Wm-2 y 80,84 Wm-2; H de 26.93 Wm-2 y 88.52 Wm-2; LE de 77.78 Wm-2 y 142.34 Wm-2; y tasa de evapotranspiración de 2.53 mm.d-1 y 5.02 mm.d-1. Las técnicas de detección remota utilizadas en este estudio fueron de gran utilidad para los análisis en áreas de senderos, destacando efectivamente el comportamiento del equilibrio energético y la evapotranspiración en este importante entorno en el Cerrado. Palabras-clave: Savanna. Recarga de agua. Estacionalidad estacional. SEBAL. Landsat 8.

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Surface Temperature and Albedo in the Ilha Solteira Region, São Paulo

Abstract: The main purpose was to perform a dynamic analysis in the fields of soil heat flux, albedo and surface temperature, with a

Cited by 3 publications

References 0 publications

Spatio-temporal water quality variability and regionalization of tropical reservoirs based on Landsat imagery

Spatio-temporal water quality variability and regionalization of tropical reservoirs based on Landsat imagery

Parâmetros Biofísicos Aplicados no Parque Nacional da Serra das Confusões, Piauí-Brasil

Análise do balanço de radiação e energia em áreas de veredas no Norte de Minas Gerais, bioma cerrado

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