Cost-benefit analysis of reservoir operation scenarios considering environmental flows for the lower stretch of the São Francisco River (Brazil)

Brambilla, Micol; Fontes, Andrea Sousa; Medeiros, Yvonilde Dantas Pinto

doi:10.1590/2318-0331.0117160014

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Deve-se ressaltar, que a ferramenta adotada foi amplamente utilizada em diversas regiões, para estudos de planejamento dos recursos hídricos (Li et al, 2015;Maliehe & Mulungu, 2017). Há diversas aplicações do WEAP para simulação de cenários de gerenciamento dos recursos hídricos e alocação de água considerando diferentes temáticas, entre elas, mudanças climáticas, uso do solo, transposição de bacias, construção e operação de barragens (Strzepek et al, 1999;Li et al, 2015;Brambilla et al, 2017;Maliehe & Mulungu, 2017;Mousavi et al, 2017;Basto et al, 2020).…”

Section: Simulação Dos Cenários Propostosunclassified

Análise da segurança hídrica do rio São Francisco considerando a evolução das demandas de água a curto e médio prazo

Silva,

Torres,

Fontes

et al. 2023

REGA

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Section: Simulação Dos Cenários Propostosunclassified

Análise da segurança hídrica do rio São Francisco considerando a evolução das demandas de água a curto e médio prazo

Silva,

Torres,

Fontes

et al. 2023

REGA

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“…The world attempts to provide water in various sectors, including drinking water, agriculture (Ajeng et al 2020), industry, and the environment (Yaseen et al 2018). On the other hand, robust management is required for appropriate use of available water resources (Rowe et al 2017;Hu 2020) to deal with industrial, agricultural, and social needs and control water scarcity (Can and Houck Responsible Editor: Broder J. Merkel 1984; Brambilla et al 2017;Ehteram et al 2018a). Moreover, assessing the potential of water resources plays a crucial role in the effective management of water resources (Selek and Aksu 2020).…”

Section: Introductionmentioning

confidence: 99%

Introducing affordable and accessible physical covers to reduce evaporation from agricultural water reservoirs and pools (field study, statistics, and intelligent methods)

et al. 2021

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Nowadays, a major part of the stored surface water resources is wasted by evaporation. By implementing low-cost methods to prevent water evaporation, it is possible to return this part of water to the agricultural, industrial, and drinking cycles. The present study aimed to evaluate the effect of polystyrene (compressed foam), pieces of wood, and synthetic beeswax cover with different surface coverage of 60%, 70%, and 80% in the standard Colorado Sunken evaporation pan on the evaporation rate. The materials used in this research are accessible, natural, and affordable in terms of practical applications. Then, the parameters of minimum and maximum temperature, maximum and minimum relative humidity, sunny hours, pressure, and wind speed were obtained from Semnan Synoptic Station near the test site. Due to limited studies in simulation of evaporation reduction through intelligent methods, the evaporation values of polystyrene, pieces of wood, and synthetic beeswax covers were simulated and estimated by using artificial intelligence methods of M5 model tree, Artificial Neural Network, and Least-Square Support Vector Machine. Results indicated that compressed foam, pieces of wood, and synthetic beeswax covers, each with 60%, 70%, and 80% coverage could reduce the evaporation rate by 43%, 54%, and 65%, 10%, 19%, and 26%, and 8%, 18%, and 25%, respectively. From a statistical point of view, the meteorological data received from Semnan Synoptic Station had significant correlations with evaporation rate from station pan, Colorado pan, and pans containing polystyrene, pieces of wood, and synthetic beeswax covers. The temperature and relative humidity parameters are factors affecting the evaporation rate in Semnan station. After evaluating the simulation accuracy based on the parameters of the root mean square error (RMSE), mean absolute error (MAE), and determination coefficient ( R 2 ), the best estimation was obtained by the LSSVM method with R 2 = 99%. From an economic viewpoint, the compressed polystyrene sheet and synthetic beeswax imposed $1 and 8 cents per m 2 in Iran. Moreover, the discarded pieces of wood that are used in the present study are inexpensive. Regarding the cost and performance of the material in reducing evaporation, it is recommended to use polystyrene material, followed by pieces of wood and beeswax.

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“…Meeting the demands of the aquatic ecosystem with the adoption of the environmental hydrogram, as an outflow rule may restrict the operational performance of reservoirs, penalizing other multiple uses, especially in periods of low availability (Pang et al, 2013;Bonsch et al, 2015;Liechti et al, 2015;McManamay et al, 2016;Brambilla et al, 2017;Li et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effects of an outflow regime adoption of the São Francisco River reservoir system to meet water demands for multiple uses

Basto

Fontes

Medeiros

2020

RBRH

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The establishment of reservoir operation rules is a strategy used to increase storage volumes and satisfy water demands. However, these rules are not always compatible with the flow regime required to meet environmental needs. This paper aims to evaluate the effects of an outflow regime adopted by the São Francisco River reservoir system, which includes environmental water requirements, in the current laws for meeting water demands for multiple uses, according to Resolution 2081/2017 of Agência Nacional de Águas - ANA. The methodology adopted was the construction and simulation of alternative outflow operation scenarios, for a regular and a dry hydrological period, which were the following: 1) Outflow scenario according to Resolution 2081/17 and (2) Outflow scenario that considers a proposed environmental flow hydrogram for the low course of the São Francisco river. The operation effects in the meeting of multiple water uses were quantified in each scenario and compared with each other. The results suggest that when the maintenance of the aquatic ecosystems is a priority, the system demonstrated low water security in meeting the reservoirs target volumes and satisfying water demands, including the environmental flows.

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Cost-benefit analysis of reservoir operation scenarios considering environmental flows for the lower stretch of the São Francisco River (Brazil)

Cited by 6 publications

References 10 publications

Análise da segurança hídrica do rio São Francisco considerando a evolução das demandas de água a curto e médio prazo

Análise da segurança hídrica do rio São Francisco considerando a evolução das demandas de água a curto e médio prazo

Introducing affordable and accessible physical covers to reduce evaporation from agricultural water reservoirs and pools (field study, statistics, and intelligent methods)

Effects of an outflow regime adoption of the São Francisco River reservoir system to meet water demands for multiple uses

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