Papers by Alvaro José Back
Revista Técnico-Científica de Engenharia Civil Unesc, Feb 22, 2022
Relações Intensidade-Duração-Freqüência de chuvas intensas de Chapecó, Estado de Santa Catarina = Intensity-duration-frequency rainfall relationship of rainfall for Chapecó, Santa Catarina State
DOAJ (DOAJ: Directory of Open Access Journals), Oct 1, 2006
This paper studies the Intensity-Duration-Frequency relationship of rainfall for the city of Chap... more This paper studies the Intensity-Duration-Frequency relationship of rainfall for the city of Chapeco, Santa Catarina State, Southern Brazil. High rainfall, with duration from 5 to 1440 minutes was studied and three equations to predict the rainfall intensity were adjusted: one for rainfall with duration below 120 minutes, another for durations between 120 and 480 minutes and the third for durations from 480 to 1440 minutes. It was also defined the relationship between several rainfall durations. Variation was observed between 24-hour rainfall and one-day rainfall, depending on the hour in which the samples were collected.
Erosivity factor and characteristics of the erosive rains for the North Plateau Region of the State of Santa Catarina, Brazil
Agropecuária catarinense, 2018
Revista de tecnologia e ambiente, Nov 28, 2017
The surface erosion is a major environmental problem, which causes degradation of agricultural la... more The surface erosion is a major environmental problem, which causes degradation of agricultural land, pollution of water resources, silting of reservoirs. This study aimed to analyze the pluviograms of Itajaí and Indaial stations located in the basin of the Itajaí river, in order to evaluate the erosivity and adjust the equations to estimate erosivity index from the average rainfall in the region. The methodology used to determine the rainfall erosivity was according to , based on the kinetic energy of the rain and the maximum intensity in 30 minutes. Regression equations were adjusted for linear and potential models with the average values of EI30 and the rainfall coefficient (Rc), adopting the model with the highest coefficient of determination. Based on the series of rainfall data values were determined monthly and yearly average and its distribution throughout the year for each season. For both stations the linear equation was more suitable, and obtained the equationsEI30 =40.56Rc + 68.74 (R² = 0.7090) and Rc =28.701Rc + 13.54 (R² = 0.8152), respectively for Indaial and Itajaí. The average value of Erosivity Index (R) for Indaial is 7025.0 MJ mm ha -1 h -1 year -1, and Itajaí 4756.3 MJ mm ha -1 h -1 yr -1 .
Revista Técnico-Científica de Engenharia Civil Unesc, Dec 10, 2019
As estruturas de drenagem como sarjetas, bocas de lobo, galerias pluviais e bueiros são dimension... more As estruturas de drenagem como sarjetas, bocas de lobo, galerias pluviais e bueiros são dimensionadas em função das chuvas intensas do local do projeto (DNIT, 2005). Na caracterização da chuva a ser usada no projeto, devem ser determinadas as relações entre intensidade, duração e frequência (IDF), que podem ser expressas por meio de curvas ou de equações IDF . Nas obras de microdrenagem, utilizam-se chuvas com duração inferior a 24 horas . No entanto, em projetos de macrodrenagem, a duração pode ser de várias horas ou até de alguns dias. Para o planejamento das obras, além do conhecimento das relações IDF, também é importante conhecer as épocas do ano com maior risco de ocorrência de eventos extremos. Nesse sentido, este trabalho teve como objetivo analisar a série histórica de chuva, determinando as relações IDF e a ocorrência sazonal dos eventos extremos de chuva, da estação pluviométrica de Vargem do Cedro, no município de São Martinho (SC). No estudo, foram usados os dados diários de precipitação do período de 1977 a 2018 da estação pluviométrica de Vargem do Cedro (Código 02848006), pertencente à
In the water supply systems exist losses inherent in the systems, which represent a major portion... more In the water supply systems exist losses inherent in the systems, which represent a major portion of investments in water supply. To improve the system efficiency and reduce costs, as well as more rational use of water resources should evaluate losses and adopt procedures to reduce them to acceptable levels. This work aimed to evaluate water loss of a water supply system located in the district of São Bento Baixo, City of Nova Veneza, in the extreme south of Santa Catarina State, Brazil. Data flow and flow measured in macro hydrometer during the period from August 2012 to August 2013 in three sectors totaling 555 consumers were analyzed. Average losses during the study period were 32.12 %. The monthly consumption values predominate in the range 0-10 m³ and only 3.97 % of the values were above 25 m³/month. Hydrometers belonging to the system are 15.19% of the volumetric type category and 84.81 % belong to the
Revista Ceres, 1990
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Drainage systems for nonsteady flow
Revista Ceres, 1990
Estimativas De Chuvas Intensas De Longa Duração Para Braço Do Norte
Editora e-Publicar eBooks, Jul 1, 2021
Revista de Gestão de Água da América Latina, 2015
Recursos hídricos -Administração. 2. Reservatórios. 3. Represas. 4. Abastecimento de água. 5. São... more Recursos hídricos -Administração. 2. Reservatórios. 3. Represas. 4. Abastecimento de água. 5. São Bento, Rio, Barragem (SC). I. Título. CDD. 22ª ed. 333.91 Bibliotecária Rosângela Westrupp -CRB 14º/364 Biblioteca Central Prof. Eurico Back -UNESC
Paisagem e território no geoprocessamento
Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena... more Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica. A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.
Tecnologia E Ambiente, Apr 15, 2013
Revista de Gestão de Água da América Latina, Apr 3, 2023
Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribut... more Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado.
Application of Chicago Hyetograph Method to Heavy Rainfall Equations of an Alternative Model Obtained by Disaggregating Daily Rainfall
Engenharia agrícola, 2024
Concilium, May 28, 2024
The concentration of rain in short periods can trigger erosion processes and natural disasters su... more The concentration of rain in short periods can trigger erosion processes and natural disasters such as floods and landslides. In order to investigate the spatial and temporal distribution of daily precipitation throughout the Brazilian territory, the Concentration Index (CI) of daily precipitation was used. 1,402 daily rainfall series were used based on regular records from 1991 to 2020. The results of the annual CI allowed the identification of five climatic zones: 0.7% of the Brazilian territory with CI <0.54 located in the state of Mato Grasso do Sul; 29.4% with CI values between 0.54 and 0.56 located in the central-west region, and in small portions of the south, southeast and north regions; 48.1% with CI values between 0.56 and 0.58 distributed in the south, southeast, north and northeast regions of the Brazilian territory; 14.7% with a CI between 0.58 and 0.60 in the northeast region, and in interior portions of the south and southeast regions; 7.1% with CI values between 0.60 and 0.70 characterized by coastal regions from the north of the state of Santa Catarina to the state of Rio Grande do Norte.
Concilium, Feb 2, 2024
Water resources are subject to hydroclimatic and spatio-temporal variations. This article aimed t... more Water resources are subject to hydroclimatic and spatio-temporal variations. This article aimed to analyze the seasonality of rainfall in Brazil. Precipitation data from 1306 rain gauge stations with data from 1990 to 2022. The precipitation seasonality index (PSI) was determined to evaluate the spatial and temporal variation in seasonality. The spatialization of ISP values was carried out using the geostatistical method of ordinary kriging. The ISP values found throughout the Brazilian territory vary from 0.273 to 1.176. This indicates that Brazil has humid regions with precipitation well distributed throughout the months throughout the year, to arid regions, with few months with rain. The lowest seasonal variability was found in the three states in the South region, on the coast of the states in the Southeast region and in the North region near the Amazon forest. The greatest seasonal variability occurs markedly in the Northeast region, close to the semi-arid Northeast, with long periods of drought.
Agropecuária Catarinense, Dec 12, 2023
Este periódico está licenciado conforme Creative Commons Atribuição 4.0 Internacional. Introdução... more Este periódico está licenciado conforme Creative Commons Atribuição 4.0 Internacional. Introdução O clima na Região Sul do Brasil e, em especial, no estado de Santa Catarina, é marcado pela ocorrência de eventos meteorológicos extremos, relacionados principalmente à ocorrência de chuvas. As chuvas intensas são responsáveis por desencadear vários desastres naturais, como inundações e deslizamentos de terra (ESCOBAR et al., 2016). A erosão do solo e os deslizamentos de terra são apontados como uma das principais preocupações ambientais em várias regiões do mundo (LUKIC et al., 2016;
Concilium, Sep 14, 2023
The study aimed to evaluate and spatialize rainfall erosivity, average annual rainfall and erosiv... more The study aimed to evaluate and spatialize rainfall erosivity, average annual rainfall and erosivity density in South America, based on 173 rain gauge stations in 7 countries, using 16 years of historical data series. The erosivity factor (EI30) from the USLE model was used to assess erosivity. The erosivity density was obtained from the relationship between erosivity and precipitation. An erosion risk map was obtained by associating the erosivity density with rainfall. The lowest erosivity factor obtained was 71.00 MJ mm ha-1 h-1 year-1 in Chile (El Sobrante) and the highest was 2,2452.00 MJ mm ha-1 h-1 year-1 in Brazil (Belém do Pará). The erosivity density showed values between 0.49 MJ ha-1 h-1 (Chile) and 12.59 MJ ha-1 h-1 (Brazil). High variability was also found for precipitation, with < 144.00 mm year-1 in Chile and > 4,327 mm year-1 (Colombia). In northeastern Brazil and northern Venezuela were identified the areas with the highest erosion risk, associated with low rainfall and high erosivity density. This indicates that precipitation in these regions is characterized by high-intensity, short-duration events (storms).
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Papers by Alvaro José Back