Estimation of evaporation in the Banabuiú dam, in the state of Ceará, Brazil, by different combined methods, derived from the Penman equation

Leão, Raimundo Alípio de Oliveira; Soares, Antônio Alves; Teixeira, Adunias dos Santos; Silva, Demétrius David da

doi:10.1590/s0100-69162013000100014

Cited by 11 publications

(8 citation statements)

References 9 publications

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“…Through this combination, a better method used to calculate evaporation was achieved. Nowadays, the Penman equation is the most widely used method (Mcmahon et al, 2012;Leão et al, 2013;Giadrossich et al, 2015). In this study, the Penman method was applied to calculate E pa by five meteorological variables.…”

Section: Sobol' Sensitivity Analysis Methodsmentioning

confidence: 99%

Historical pan evaporation changes in the Qiantang River Basin, East China

Pan

Gao

et al. 2015

Int. J. Climatol.

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Pan evaporation (E pa ) has been decreasing in many regions of the world in the past decades. Analysis of the changes in E pa helps to understand the variation of vapour in the hydrological cycle and the impact of climate change on E pa . This study aims to investigate the spatial and temporal trends in E pa and analyse the causes of E pa variation in the Qiantang River Basin, East China. A self-organizing map neural network is first applied to classify the 40 hydrological stations. Based on the clustering results, a trend-free pre-whitening Mann-Kendall test is then used to investigate the historical trends in E pa based on more than 50 years of monthly observations. Finally, sensitivity analysis is conducted for evaluating the relationship between E pa and five climate variables and for investigating the causes of changes in E pa using a global, variance-based method. It is found that the hydrological stations located in this basin can be classified into six sub-areas and the E pa trends vary substantially at six sub-areas. Generally, there is a decreasing trend of E pa in a majority of months in all sub-areas except one and the most significant decreases occur in summer. The results of sensitivity analysis reveal that E pa is more sensitive to solar radiation, followed by minimum air temperature, wind speed, relative humidity and maximum air temperature. The contribution of interactions between different climate variables to the variation of E pa cannot be ignored in some specific stations. Overall, the change of E pa is mainly due to the decrease of solar radiation. This study provides an in-depth understanding of the causes of E pa variation and valuable information for sustainable water and crop management in this region.

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Section: Sobol' Sensitivity Analysis Methodsmentioning

confidence: 99%

Historical pan evaporation changes in the Qiantang River Basin, East China

Pan

Gao

et al. 2015

Int. J. Climatol.

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“…Teoricamente, a água absorve calor durante a alteração do seu estado físico, (JENSEN, 2010) ocorrendo assim o processo de evaporação, principalmente durante os períodos mais quentes do dia e nas zonas mais quentes da Terra, como as regiões áridas e semiáridas (GALLEGO-ELVIRA et al, 2012;LEÃO et al, 2013).…”

Section: Dados Climatológicos Da áRea Experimentalunclassified

Redução Na Evaporação De Águas Superficiais Visando Incremento Da Disponibilidade Hídrica No Semiárido Pernambucano

Santos¹,

Silva

Soares

et al. 2017

R_I

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REDUÇÃO NA EVAPORAÇÃO DE ÁGUAS SUPERFICIAIS VISANDO INCREMENTO DA DISPONIBILIDADE HÍDRICA NO SEMIÁRIDO PERNAMBUCANO MAX HENRIQUE VIEIRA DOS SANTOS¹; ÊNIO FARIAS DE FRANÇA E SILVA1; TALES MILER SOARES2; GEBER BARBOSA DE ALBUQUERQUE MOURA3 E ALEXSANDRO OLIVEIRA DA SILVA4 1 Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros. s/n, Dois Irmãos, Recife-PE. E-mail: maxhvs@gmail.com, enio.fsilva@ufrpe.br2 Núcleo de Engenharia de Água e Solo, Universidade Federal do Recôncavo Baiano, Rua Rui Barbosa, 710, Cruz das Almas-BA. E-mail: talesmiler@gmail.com3Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros. s/n, Dois Irmãos, Recife-PE. E-mail: geber.moura@ufrpe.br4 Departamento de Engenharia Agrícola, Universidade Federal do Ceará, Av. Mister Hull, 2977, Fortaleza-CE. E-mail: alexsandro@ufc.br 1 RESUMO A evaporação é um dos fatores que contribui para a redução da disponibilidade hídrica de reservatórios nas regiões semiáridas. Diante disto, objetivou-se avaliar diferentes tipos de telas de sombreamento sobre a redução da evaporação de água de superfícies livres na região semiárida. A estrutura foi composta por 20 tanques dispostos em um delineamento experimental inteiramente casualizado com telas de polietileno com 50% de sombreamento nas cores vermelha, azul, branca, preta e prata e telas na cor preta com porcentagens de sombreamento 50, 70 e 80%; como testemunha, foram adicionadas parcelas sem cobertura, ambos com quatro repetições. A estrutura experimental foi localizada na Estação da Agricultura Irrigada de Ibimirim - PE, Brasil. Após 30 dias observou-se que a tela na cor branca foi a mais eficiente na redução da evaporação a qual foi 64,6% inferior à evaporação do tanque Classe A. Enquanto isso, a percentagem de sombreamento da tela preta de 80% reduziu a evaporação em 66% quando comparada com o tanque Classe A. Em termos de volume, a economia pode atingir, quando estimada para o reservatório Engenheiro Francisco Sabóia, em média 7.038.939,3m3 quando se utiliza telas de sombreamento na cor branca e tela preta com percentagem de sombreamento de 80%. Palavras-chave: tanques evaporímetros, telas de sombreamento, variáveis climáticas. SANTOS, M. H. V.; SILVA, Ê. F. F.; SOARES, T. M.; MOURA, G. B. A.; SILVA, A. O.REDUCTION IN SURFACE WATER EVAPORATION AIMING AT INCREASING WATER AVAILABILITY IN THE SEMIARID REGION OF THE STATE OF PERNAMBUCO 2 ABSTRACT Evaporation is one of the factors that contributes to the reduction of water availability in reservoirs in the semiarid region of the state of Pernambuco. Given this, the objective of this study was to evaluate different types of shading screens in the reduction of the water evaporation in tropical semiarid region. The structure was composed of 20 tanks in a completely randomized design; covered by polyethylene screens with 50% shading in red, blue, white, black and silver; and black screens with shading percentages of 50%, 70% and 80%, as a control, uncovered plots (SC) were added, both with four replications. The experimental structure was located in the Irrigated Agriculture Station of Ibimirim, PE, Brazil. The white screen was efficient in the most efficient in reducing evaporation, 64.6% below the evaporation of class A tank. The black screen with the 80% shading percentage reduced by 66% the evaporation in ratio compared to Class A tank. In terms of volume, savings may reach, when estimated for the Engenheiro Francisco Savoy reservoir, an average of 7,038,939.3 m3 using shading screens with white and black screens, with an 80% shading percentage. Keywords: evaporimeter tanks, shading screens, climatic variables.

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“…The authors used the energy budget method as a reference, and found that the Penman, DeBruin-Keijman, and Priestley-Taylor methods were the ones that most closely agreed with the energy budget. Leão et al (2013) [28] assessed six evaporation methods while using the water balance as a reference and found that the Priestley-Taylor method performed best for a large dam in semiarid Brazil. However, regardless of their importance for water resource planning and management, no studies on small reservoir evaporation were found in the conditions of the Brazilian savannah.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Evaporation Methods for Estimating Small Reservoir Water Surface Evaporation in the Brazilian Savannah

Althoff

Silva

2019

Water

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Small reservoirs play a key role in the Brazilian savannah (Cerrado), making irrigation feasible and contributing to the economic development and social well-being of the population. A lack of information on factors, such as evaporative water loss, has an impact on the design and management of these reservoirs, as well as on regional water safety. Acquiring this information is crucial for hydrologists to develop more effective water resource management strategies and policies. This study assesses the performance of a diverse number of methods that are used to estimate evaporation and provides evaporation probability curves on a fortnightly period for small reservoirs in the Brazilian savannah region. Evaporation data were collected for a small water reservoir located in the Buriti Vermelho watershed, a typical dam of the Brazilian savannah region. Among the assessed methods, those of Kohler et al. (1955) and Linacre (1993) presented the best performances on both the daily and monthly scales for evaporation estimates. By simulating the evaporation rates for a timeseries, an increasing trend in evaporation was observed for the transition between the dry and wet seasons, jeopardizing double cropping in the region. The developed probability curves are an important tool for improving water resource planning and increasing the local water availability.

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Estimation of evaporation in the Banabuiú dam, in the state of Ceará, Brazil, by different combined methods, derived from the Penman equation

Cited by 11 publications

References 9 publications

Historical pan evaporation changes in the Qiantang River Basin, East China

Historical pan evaporation changes in the Qiantang River Basin, East China

Redução Na Evaporação De Águas Superficiais Visando Incremento Da Disponibilidade Hídrica No Semiárido Pernambucano

Evaluating Evaporation Methods for Estimating Small Reservoir Water Surface Evaporation in the Brazilian Savannah

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