scholarly journals Evaluation of the use of GFS analysis data for energy management over Minas Gerais State (Brazil)

2020 ◽  
Author(s):  
Rafael Arcanjo de Oliveira Filho ◽  
Vanessa Silveira Barreto Carvalho ◽  
Michelle Simões Reboita

Several regions of Brazil have been experiencing periods of intense drought in the last decades. Hydropower plants produce most of the energy of the country and a reduction in the reservoir flow can compromise the energy sector. Therefore, the Brazilian government has seek the diversification of energy production with other renewable sources. The introduction of new renewable sources such as wind and solar power requires a detailed study about local weather conditions usually through historical data analysis. However, several areas in Brazil are not covered by weather stations. In this context, this study aims to assess the ability of the Global Forecast System (GFS) to represent wind, on the state of Minas Gerais (MG) which has 79.5% of energy production associated with water resources. Although the study considers a specific region, it presents a methodology that can be replicated in regions where there is no data available. For most areas, 10 meters wind speed values of the GFS analysis were similar to those registered by the weather stations. For 10 and 100 meters of altitude, results shows higher wind speed values in the north of the state, a region where the highest power densities are also recorded (approximately 150 Wm-2 in winter and spring). The state is characterized by low precipitation rates during winter and spring, when the winds are, in turn, more intense. Model results indicate that the region reaches the minimal meteorological conditions required for wind energy production that can be used as a complementary source of hydroelectricity.

Oryx ◽  
2014 ◽  
Vol 49 (1) ◽  
pp. 60-63 ◽  
Author(s):  
Guilherme Braga Ferreira ◽  
Marcelo Juliano Rabelo Oliveira ◽  
Rogério Cunha de Paula ◽  
Flávio Henrique Guimarães Rodrigues ◽  
Érica Daniele Cunha Carmo

AbstractThe bush dog Speothos venaticus, a rare Near Threatened South American canid that lives in packs, was thought to be extinct in Minas Gerais state, south-eastern Brazil, until recently. Here, we report four recent records of the species in Minas Gerais, the first in the state since the description of the species in 1842. All records are from the Cerrado ecosystem in the north and north-west of the state; two are from animals found dead, one from footprints and another from a camera trap. Three of the records were inside or close (< 10 km) to strict protected areas, in a region recognized as the Protected Areas Mosaic Sertão Veredas–Peruaçu, where we expect any new records of the bush dog to be found. We discuss the low probability of detecting the bush dog and the main regional threats to the species, and emphasize the need to protect large and interconnected natural areas and keep them free of domestic dogs to avoid the extinction of the bush dog in Minas Gerais.


2021 ◽  
Vol 7 (20) ◽  
pp. 202106
Author(s):  
Marcelo Cervo Chelotti ◽  
Rosa Maria Vieira Medeiros

CARTOGRAPHS OF VITICULTURE IN MINAS GERAIS: from South genesis to North expansionCARTOGRAFÍAS DE LA VITICULTURA EN MINAS GERAIS: de la génesis en el Sur a la expansión al NorteRESUMOO presente artigo tem como objetivo analisar a reorientação no deslocamento do padrão espacial do cultivo de uvas no estado de Minas Gerais, originalmente localizado no Sul, mas expandiu-se para o norte mineiro nas últimas décadas. Os procedimentos metodológicos centraram-se na revisão de literatura sobre a viticultura no Brasil, e na coleta em dados secundários na Pesquisa Agrícola Municipal/PAM/IBGE, nos Censos Agropecuários do IBGE, além do Banco de Dados de Uva, Vinho e Derivados/VITIBRASIL. Os mapas temáticos demonstraram a dinâmica da viticultura em Minas Gerais, evidenciando uma mudança no padrão espacial, ou seja, historicamente concentrada no sul do estado, mas verificamos no pós-1990 uma expansão geográfica para o norte, principalmente em direção ao Cerrado e vale do Rio São Francisco. O papel desempenhado pela pesquisa, na busca de novas técnicas para a viticultura em regiões tropicais, tem uma grande centralidade nesse processo, uma vez que estamos diante de um novo paradigma para a produção de uvas e vinhos.Palavras-chave: Viticultura; Regionalização; Geografia do Vinho; Minas Gerais.ABSTRACTThis article has the goal to analyze the reorientation in the displacement of the spatial pattern of grape cultivation in the state of Minas Gerais, originally located in the south, but has expanded to the north of Minas Gerais in recent decades. The methodological procedures focused on the literature review on viticulture in Brazil, and the collection of secondary data from the Municipal Agricultural Research/PAM/IBGE, the IBGE Agricultural Census, and the Grape, Wine and Derivatives Database/VITIBRASIL. Thematic maps showed the dynamics of viticulture in Minas Gerais, showing a change in the spatial pattern, that is, historically concentrated in the south of the state. Sao Francisco River. The role played by the research in the search for new techniques for viticulture in tropical regions has a great centrality in this process, since we are facing a new paradigm for the production of grapes and wines.Keywords: Viticulture; Regionalization; Wine Geography; Minas Gerais.RESUMENEl presente artículo tiene como objetivo analizar la reorientación en el desplazamiento del patrón espacial del cultivo de la uva en el estado de Minas Gerais, originalmente ubicado en el sur, pero se ha expandido al norte de Minas Gerais en las últimas décadas. Los procedimientos metodológicos se centraron en la revisión de la literatura sobre viticultura en Brasil, y en la recopilación de datos secundarios en la Investigación Agrícola Municipal/PAM/IBGE, en los Censos Agrícolas del IBGE, además de la Base de Datos de Uva, Vino y Derivados/VITIBRASIL. Los mapas temáticos demostraron la dinámica de la viticultura en Minas Gerais, mostrando un cambio en el patrón espacial, es decir, históricamente concentrado en el sur del estado, pero en la década de 1990 verificamos una expansión geográfica hacia el norte, principalmente hacia el Cerrado y Vale do Río São Francisco El papel desempeñado por la investigación, en la búsqueda de nuevas técnicas para la viticultura en las regiones tropicales, tiene una gran centralidad en este proceso, ya que nos enfrentamos a un nuevo paradigma para la producción de uvas y vinos.Palabras-clave: Viticultura; Regionalización; Geografía del Vino; Minas Gerais.


Check List ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 432
Author(s):  
João Luiz Gasparini ◽  
Diogo Andrade Koski ◽  
Pedro L.V. Peloso

We present the first record of Urostrophus vautieri for the state of Espírito Santo and a distribution map for the species. This species was previoulsy known from the states of Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul. The present record represent an extension of nearly 200 km to the North from the nearest published record for the species.


1996 ◽  
Vol 14 (10) ◽  
pp. 1088-1094 ◽  
Author(s):  
E. Cogliani ◽  
G. Abbate ◽  
S. Racalbuto

Abstract. Ground temperature, pressure and wind speed monthly averages in the area of the Italian Station at Terra Nova Bay, Antarctica, were analyzed for the period 1987–1991 by means of a network of nine AWS (automatic weather stations). Spatial configurations of temperature show a well-defined, relatively warm island in the area of Terra Nova Bay, between Drygalsky and Campbell ice tongues, throughout the year. A second warm island is present to the north along the coast, between Aviator and Mariner ice tongues, for most of the year. From February to March a rapid drop in temperature is observed at all stations. A strong thermal gradient develops during February, March, April and October, November, December, between the coastal region and inner highlands. The baric configuration follows the elevation of the area. Annual average pressure and temperature as functions of stations altitude show linear trends. Severe katabatic wind episodes are recorded at all stations, with wind speed exceeding 25 m s–1 and direction following the orographic features of the inner areas. Co-occurrences of these episodes were observed for stations located along stream lines of cold air drainage. The autocorrelation function of maximum wind speed time series shows wind persistence of 2–3 days and wind periodicity of about one week.


2021 ◽  
pp. 0309524X2110351
Author(s):  
Abeba Debru ◽  
Mulu Bayray ◽  
Marta Molinas

The objective of this paper was to assess the performance of the Adama-II Wind Farm in comparison to the feasibility study. Using 1-year mast data, the site potential was reassessed by WAsP software and the performance of wind turbine generators was assessed by 2 years of SCADA data. The obtained mean annual wind speed and power density were 7.75 m/s, and 462 W/m2 while in the feasibility study, 9.55 m/s, and 634.6 W/m2, which resulted in 18.8%, and 27.1% deviations respectively. The prevailing and secondary wind directions obtained were ENE and NE with 35.7% and 19.1% while, in the feasibility study, ENE with 36.5% and E with 17.3%. From the SCADA data, the Capacity factor, Annual Energy Production (AEP), and Availability of wind turbines were determined as 30.5%, 398 GWh, and 95.1%. The reasons for the deviation were difference in long-term correction data and weather conditions during study period.


Irriga ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 458-467
Author(s):  
Angélica Carvalho Cunha ◽  
Cesar De Oliveira Ferreira Silva ◽  
Rodrigo Lilla Manzione ◽  
Fernando Ferrari Putti

EVAPOTRANSPIRAÇÃO DE REFERÊNCIA AO LONGO DO ESTADO DE MINAS GERAIS COMO GUIA PARA A GESTÃO REGIONALIZADA DA IRRIGAÇÃO     ANGÉLICA CARVALHO CUNHA1; CÉSAR DE OLIVEIRA FERREIRA SILVA2; RODRIGO LILLA MANZIONE3 E FERNANDO FERRARI PUTTI4   1 Departamento de Engenharia de Biossistemas, Faculdade de Ciências e Engenharia, Universidade Estadual Paulista, Rua. Domingos da Costa Lopes, nº 780, Jardim Itaipu, 17602-496, Tupã, São Paulo, Brasil, [email protected]. 2 Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista", Avenida Universitária, n° 3780, Altos do Paraíso, 18610-034, Botucatu, São Paulo, Brasil, [email protected]. 3 Departamento de Engenharia de Biossistemas, Faculdade de Ciências e Engenharia, Universidade Estadual Paulista, Rua. Domingos da Costa Lopes, nº 780, Jardim Itaipu, 17602-496, Tupã, São Paulo, Brasil, [email protected]. 4Departamento de Engenharia de Biossistemas, Faculdade de Ciências e Engenharia, Universidade Estadual Paulista, Rua. Domingos da Costa Lopes, nº 780, Jardim Itaipu, 17602-496, Tupã, São Paulo, Brasil, [email protected].     1 RESUMO   Minas Gerais é o terceiro estado brasileiro com maior área irrigada, sendo assim é de suma importância o manejo da irrigação para garantir o uso sustentável dos recursos hídricos. Uma das formas de se calcular a quantidade hídrica necessária na irrigação é por meio da estimativa da evapotranspiração de referência (ETo). Os valores de evapotranspiração são influenciados por diversos fatores climatológicos, como: radiação solar, temperatura, deficiência de pressão de vapor, logo, os valores de evapotranspiração tendem a diferir de acordo com cada região. Assim, o presente estudo propõe a elaboração de um mapa de evapotranspiração de referência média para o estado de Minas Gerais como base para gestão hídrica para a agricultura. Os dados foram fornecidos pelo Instituto Nacional de Meteorologia (INMET), utilizando Estações Meteorológicas Automáticas (EMAs) localizadas em 49 cidades do estado de Minas Gerais. Por meio das análises realizadas, pôde-se observar que, em mesorregiões caracterizadas por maior seca, como o norte do estado, os índices de evapotranspiração foram maiores do que em mesorregiões mais úmidas, que apresentam maiores níveis de precipitação, como as Regiões Centro, Sul e Triângulo Mineiro. Devido a sua característica úmida, a região do bioma Mata Atlântica obteve menores valores de ETo em relação aos biomas do Cerrado e Caatinga. Palavras-chave: gestão hídrica, manejo da irrigação, modelagem de dados.     CUNHA, A. C.; SILVA, C. O. F.; MANZIONE, R. L.; PUTTI, F. F. REFERENCE EVAPOTRANSPIRATION THROUGHOUT THE STATE OF MINAS GERAIS AS A GUIDE FOR REGIONALIZED IRRIGATION MANAGEMENT     2 ABSTRACT   Minas Gerais is the third Brazilian state with the largest irrigated area, so irrigation management is of paramount importance to ensure the sustainable use of water resources.  One way of calculating the water quantity needed for irrigation is by estimating reference evapotranspiration (ETo). Evapotranspiration values are influenced by several climatological factors, such as solar radiation, temperature, vapor pressure deficiency; therefore, evapotranspiration values tend to differ according to each region. Thus, this study proposes the use of a medium reference evapotranspiration map of Minas Gerais as a basis for water management in agriculture. The data were provided by the National Institute of Meteorology (INMET), using Automatic Meteorological Stations (EMAs) located in 49 cities in the state of Minas Gerais. Through the analysis conducted, it was observed that, in mesoregions characterized by greater drought, such as the north of the state, evapotranspiration rates were higher than in more humid mesoregions, which present higher levels of precipitation, such as the Central, Southern, and Mineiro Triangle Regions. Due to its humid characteristic, the region of the Atlantic Forest biome had lower ETo values compared to the Cerrado and Caatinga biomes.   Keywords: water management, irrigation management, data modeling.


2017 ◽  
Vol 10 (4) ◽  
pp. 1281
Author(s):  
Deborah Luiza Poletto de Paula ◽  
Fernando Angelo Couto Cardoso ◽  
Rafael Balbino Cardoso ◽  
Giselle De Paula Queiroz Cunha ◽  
Eliane Maria Vieira

Sendo considerada uma das alternativas energéticas mais promissoras na busca de soluções para reverter o quadro atual de mudanças climáticas, a energia eólica tem ganhado destaque no cenário mundial por ser uma fonte de energia renovável e limpa quando comparada com outros tipos de geração. O conhecimento do regime dos ventos é um dos elementos mais importantes na avaliação.do potencial eólico de uma região, contudo a instalação de torres de medição em quantidade e disposição adequada para estes estudos ainda apresentam um custo financeiro e logístico elevado, desta forma, o trabalho objetivou especializar a velocidade do vento no estado de Minas Gerais a partir de dados coletado por estações do Instituto Nacional de Meteorologia INMET. Foram empregadas 73 estações meteorológicas distribuídas geograficamente pelo estado e nos estados que o circundam. Os mapas de velocidade média do vento para as alturas de 50, 75 e 100 metros foram obtidos a partir de um interpolador geoestatístico chamado krigagem universal, trabalhado no Sistema de Informações Geográficas (SIG), ArcGIS®. Os mapas produzidos demonstram que na região noroeste e norte do estado, próximo aos estados do Espírito Santo e Bahia, valores iguais e superiores a velocidade de 2,5 m/s (velocidade adotada como mínima para a geração de energia) foram observados para todos os meses avaliados, demonstrando ser esta uma região potencial, onde estudos mais locais devem ser realizados para a confirmação deste potencial para geração de energia eólica.  A B S T R A C TConsidered one of the most promising energy alternatives in the search for solutions to reverse the current climate change picture, wind energy has gained prominence in the world scenario as a renewable and clean source of energy when compared to other types of power generation. Knowledge of the wind regime is one of the most important elements in the evaluation of the wind potential of a region. However, the installation of measurement towers in quantity and adequate layout for these studies still represents a high financial and logistical cost. This work aimed to model the wind speed in the state of Minas Gerais, Brazil from data collected by INMET National Meteorological Institute, using data from 73 meteorological stations distributed geographically by the state and in the states that surround it. The mean wind speed maps for the heights of 50, 75 and 100 meters were generated with a geostatistical interpolator called universal kriging, available on the Geographic Information System (GIS) software, ArcGIS®. The maps produced showed that in the northwest and north of the state, close to the states of Espírito Santo and Bahia. Values equal to and greater than 2.5 m/s (speed adopted as minimum for power generation) were observed for all the months evaluated, demonstrating that this is a potential region where more local studies must be carried out to confirm this potential for wind energy generation.Keywords: Wind Speed; Geographical Information System; State of Minas Gerais; kriging.  


Irriga ◽  
2006 ◽  
Vol 11 (4) ◽  
pp. 460-468 ◽  
Author(s):  
Eugênio Ferreira Coelho ◽  
Édio Luis da Costa ◽  
Carlos Alberto da Silva Ledo ◽  
Sebastião De Oliveira e Silva

PRODUTIVIDADE E EFICIENCIA DE USO DE ÁGUA DAS BANANEIRAS ´PRATA ANô E ´GRAND NAINE´ SOB IRRIGAÇÃO NO TERCEIRO CICLO NO NORTE DE MINAS GERAIS  Eugênio Ferreira Coelho1; Édio Luis da Costa2; Carlos Alberto da Silva Ledo1; Sebastião de Oliveira e Silva1 1Embrapa Mandioca e Fruticultura, Cruz das Almas, BA, [email protected], Epamig, Nova Porteirinha, BA  1 RESUMO O trabalho teve como objetivo definir o regime de irrigação mais adequado à cultura da bananeira, no terceiro ciclo, para as condições do Norte de Minas Gerais. O delineamento experimental foi em blocos casualizados, em parcelas subdivididas, com três freqüências de irrigação na parcela, cinco lâminas de irrigação para cada freqüência e duas cultivares por lâmina em quatro repetições. Os cinco regimes de irrigação foram definidos em função da evapotranspiração da cultura a partir de variações do coeficiente de cultivo fixado em 1,1 em todo o ciclo. A produtividade das cultivares e algumas características físicas dos frutos foram avaliadas para todos os tratamentos. Foi observado resposta das cultivares em todas as variáveis dependentes avaliadas e influencia do regime de irrigação na produtividade da bananeira para ambas as cultivares. Não houve efeito da freqüência de irrigação na produtividade, apenas no diâmetro de frutos. O regime de irrigação correspondente ao uso da ETc a partir do coeficiente de cultura fixo em 1,1 durante o ciclo foi o mais adequado para ambas as cultivares de banana, tanto em termos de produtividade como em eficiência de uso de água.  A cultivar Grand Naine é mais eficiente no uso de água que a cultivar Prata Anã. UNITERMOS: Musa sp., evapotranspiração, coeficiente de cultivo, cultivares “Grand Naine” , “Prata Anã”.  COELHO, E. F.; COSTA, É. L. da; LEDO, C. A. da S.; SILVA, S. de O. e. PRATA ANA´ AND ´GRAND NAINE’ BANANA YIELD UNDER IRRIGATION IN THE NORTH OF MINAS GERAIS  2 ABSTRACT This study aimed to define the most adequate irrigation level for banana crop under Northern Minas Gerais weather conditions. The experiment followed a randomized block design in a split-plot scheme, with three irrigation frequencies, five water depths for each frequency and two cultivars for each water depth.  Four replications were adopted. The five irrigation levels were defined according to crop evapotranspiration obtained from variations of a referential crop coefficient (Kc = 1.1).  Total yield and some physical fruit characteristics were evaluated for all treatments in both cultivars. All dependant variables and influence of irrigation levels for both cultivars were observed. Irrigation frequency did not affect crop yield, only fruit diameter. The irrigation level based on the referential crop coefficient of 1.1 was the most adequate one for both banana cultivars in relation to yield and water use efficiency. Irrigation is more efficient for Grand Naine cultivar than Prata Anã. KEYWORDS: Musa sp., evapotranspiration, crop coefficient, “Grand Naine”, “Prata Anã” cultivars.


2020 ◽  
Vol 8 ◽  
Author(s):  
Thiago Henrique Evangelista Alves ◽  
Tafarel Andrade de Souza ◽  
Samyla de Almeida Silva ◽  
Nayani Alves Ramos ◽  
Stefan Vilges de Oliveira

The COVID-19 pandemic brings to light the reality of the Brazilian health system. The underreporting of COVID-19 deaths in the state of Minas Gerais (MG), where the second largest population of the country is concentrated, reveals government unpreparedness, as there is a low capacity of testing in the population, which prevents the real understanding of the general panorama of SARS-CoV-2 dissemination. The goals of this research are to analyze the causes of deaths in different Brazilian government databases (Civil Registry Transparency Portal and InfoGripe) and to assess whether there are sub-records showing an unexpected increase in the frequency of deaths from causes clinically similar to COVID-19. A descriptive and quantitative analysis of the number of deaths by COVID-19 and similar causes was performed in different databases. Our results demonstrate that different official sources had a discrepancy of 109.45% between these data referring to the same period. There was also a 758.57% increase in SARI deaths in 2020, when compared to the average of previous years. Finally, it was shown that there was an increase in the rate of pneumonia and respiratory insufficiency (RI) by 6.34 and 6.25%, respectively. In conclusion, there is an underreporting of COVID-19 deaths in MG due to the unexplained excess of deaths caused by SARI, respiratory insufficiency, and pneumonia compared to previous years.


Sign in / Sign up

Export Citation Format

Share Document