Potencial de geração de energia eólica no Submédio São Francisco

Lopes, Iug; Júnior, Euvaldo Pereira de Cerqueira; Melo, Juliana Maria Medrado de; Leal, Brauliro Gonçalves

doi:10.24221/jeap.2.3.2017.1407.330-340

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…By observing the average monthly variation of wind direction for ve regions of the Paraíba state (São Gonçalo, Monteiro, Patos, Campina Grande and João Pessoa), found similar results to those found here, with wind direction in the regions varying between the angles of 20º and 180° in the study period. In an analogous study for the Sub-middle São Francisco River,Lopes et al (2017) found a predominant frequency in the southeast direction for the winds in the region.…”

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confidence: 81%

Wind Intensity and Power Density in the Brazilian Dry Tropical Forests (Caatinga)

Silva¹,

Sousa²,

Cavalcanti³

et al. 2021

Preprint

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Wind speed has been widely used for energy purposes. Therefore, studies focused on its knowledge are extremely relevant to better benefit from this resource. The aim of this study is to analyze wind behavior and estimate wind power density (WPD) in the interior of northeastern Brazil, a region with predominance of the semi-arid climate, based on the data made available by the automatic station installed at the Experimental Farm in the municipality of São João do Cariri-PB, which come from the SONDA project and refer to the year 2007. Descriptive analysis techniques were used to identify the periods in which the wind behavior is more favorable to wind harnessing. From the results obtained, there was a predominance of southeast in the wind direction component. However, the values of both the observed wind speed (2, 25 and 50 m) and the wind speed estimated for the levels of 100 and 150 m, as well as the estimates of power density (50, 100 and 150 m) showed that the lowest records are present mainly in the first hours of the day, as well as in the first half of the year, while the highest values occur from 10 a.m. extending to the beginning of the night and prevail in the last six months of the year. These determinations denoted higher values of wind power density available for the second half of the year (mainly from August to December).

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confidence: 81%

Wind Intensity and Power Density in the Brazilian Dry Tropical Forests (Caatinga)

Silva¹,

Sousa²,

Cavalcanti³

et al. 2021

Preprint

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“…A região segundo classificação climática de Peel et al ( 2007) apresenta clima BSh, predominando o semiárido, com precipitação média anual aproximada de 430 mm. A umidade relativa do ar média anual é de 66% e a temperatura média anual do ar é de 26,5ºC (Pinheiro et al, 2015;Nemus, 2016;Sá, 2016;Lopes et al, 2017;Silva et al, 2021). Figura 1.…”

Section: Caracterização Da áRea De Estudounclassified

Estimativa do TVDI para avaliação das condições hídricas em áreas de produção de cana-de-açúcar no semiárido brasileiro.

Martins

Lopes

Martins

2022

Rev. Bras. Geog. Fis.

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da sua demanda hídrica é fundamental para o manejo adequado, podendo-se, a partir dela, avaliar e mensurar o desenvolvimento morfofisiológico das plantas, acompanhando seu crescimento ao longo de todo o ciclo. Existem diversos parâmetros biofísicos que estimam as condições hídricas da cultura, dentre eles o Temperature Vegetation Dryness Index-TVDI. O objetivo deste trabalho é utilizar o TVDI para avaliar as condições hídricas em áreas de produção de cana-de-açúcar no semiárido brasileiro, por meio da relação de parâmetros biofísicos, utilizando técnicas de geoprocessamento e sensoriamento remoto. Como resultado, obteve-se o valor de 0,64 como a maior média de TVDI em 22/09/2014 e 10/08/2016, ambas com 64,0% de superfície ressecada. A menor média de TVDI foi 0,41 em 30/05/2013. O TVDI elevado está relacionado com as fases iniciais e após a colheita, períodos em que o solo está mais exposto à radiação global aumentando o ressecamento. Os menores valores de TVDI foram encontrados nas fases de desenvolvimento avançando quando a cultura apresentou grande densidade, cobrindo o solo e diminuindo o nível de ressecamento. O TVDI se mostrou um índice capaz de analisar a complexidade das condições de ressecamento da superfície condicionada às diferentes temperaturas e diferentes níveis de biomassa da cana-de-açúcar que recobrem o solo, auxiliando no manejo da irrigação, tornando-a mais efetiva e precisaPalavras-chave: método do triângulo, geotecnologia, irrigação, ressecamento TVDI estimate to assess water conditions in sugarcane production areas in the Brazilian semiarid region.ABSTRACTSugarcane is one of the most important agricultural crops for the Brazilian market. Monitoring its water demand is essential for proper management, and from this, it is possible to evaluate and measure the morphophysiological development of plants, following their growth throughout the cycle. There are several biophysical parameters that estimate the water conditions of the crop, including the Temperature Vegetation Dryness Index – TVDI. The objective of this work was used TVDI to evaluate water conditions in sugarcane production areas in Brazil semiarid through the relationship of biophysical parameters using geoprocessing and remote sensing techniques. The highest average of 0.64 TVDI was found on the dates 2014/09/22 and 2016/08/10 both with 64.0% of dry area. The lowest TVDI average, 0.41, occurred on 2013/30/05. Elevated TVDI is related to the initial stages and after harvest, periods when the soil is most exposed to high global radiation and dryness. The lowest values of TVDI were found in the advanced development stages when the crop showed high density, covering the soil and decreasing the level of dryness. TVDI proved to be able to characterize the complexity of the dryness of the surface conditioned to the different differences and levels of sugar cane biomass that covered the soil, helping in the irrigation management, leading to more effective and accurate actions.

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“…A umidade relativa do ar média anual é de 66% e a temperatura média anual do ar de 26,5 ºC. A evapotranspiração potencial média anual é de 1550 mm (Pinheiro et al, 2015;Lopes et al, 2017;CODEVASF, 2019).…”

Section: áRea De Estudounclassified

Evapotranspiração de canaviais em diferentes fases fenológicas por sensoriamento remoto no vale do submédio do São Francisco.

Martins

Lopes

Silva

et al. 2019

Jour. Hypers. Rem. Sensg.

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The study aimed to estimate the reference evapotranspiration of sugarcane using the Priestley-Taylor method, comparing with the standard Penman-Monteith-FAO 56 method in the region of the São Francisco Submiddle Valley in the period from 2013 to 2016. Images of the Landsat-8 satellite of the OLI and TIRS sensors acquired from the North American space Agency (NASA) and meteorological data from the Instituto Nacional de Pesquisas Espaciais (INPE) were used, along with the Sistema de Organização Nacional de Dados Ambientais (SONDA) and the Instituto Nacional de Pesquisas Espaciais (INMET). The instantaneous radiation balance, soil heat flow, latent heat flow, crop coefficient (Kc) and Priestley-Taylor coefficient were estimated to obtain the reference evapotranspiration, which ranged from 0.00 to 3.65 mm d-1. The validation proceeded through the correlation between method of crop coefficient applied for Priestley-Taylor and Penman-Monteith. The value of R² 0.75, Pearson coefficient (R) 0.88 (strong correlation) and the mean error found in 1.81 mm d-1 were considered satisfactory. The Priestley-Taylor method was able to estimate the reference evapotranspiration in sugarcane production areas in the region of the São Francisco Submiddle Valley in a satisfactory way.

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Potencial de geração de energia eólica no Submédio São Francisco

Cited by 7 publications

References 16 publications

Wind Intensity and Power Density in the Brazilian Dry Tropical Forests (Caatinga)

Wind Intensity and Power Density in the Brazilian Dry Tropical Forests (Caatinga)

Estimativa do TVDI para avaliação das condições hídricas em áreas de produção de cana-de-açúcar no semiárido brasileiro.

Evapotranspiração de canaviais em diferentes fases fenológicas por sensoriamento remoto no vale do submédio do São Francisco.

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