Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220210082
Carolina Ferreira de Souza, H. Knapik, J. C. D. Azevedo
Abstract Photodegradation is an important process for aquatic metabolism, related to the dissolved organic matter (DOM) transformation in water. For example, in a water supply reservoir, DOM is an important parameter since it can react and form disinfection by-products during water treatment. Thus, the understanding and determination of photodegradation rates are especially relevant for water resources management since they can influence DOM transformation in the water column. However, besides its relevance, few studies were conducted in the southern hemisphere for photodegradation rates determination. Therefore, we carried out field experiments to characterize and evaluate DOM photodegradation rate ‒ at different depths and in two solar irradiation periods ‒ through the application of absorption spectroscopy techniques in the UV-Vis region and fluorescence excitation-emission matrices (EEM) combined with the dissolved organic carbon (DOC) measurement. Low concentrations of natural DOM and nutrients in the aquatic environment were measured during the field monitoring. Our results indicate that photodegradation rates for a temperate oceanic climate reservoir were proportional to the availability of solar radiation, being more representative considering the time scale.
{"title":"Dissolved organic matter photodegradation in a water supply reservoir on temperate oceanic climate (Cfb): a case study of Passaúna reservoir, Brazil","authors":"Carolina Ferreira de Souza, H. Knapik, J. C. D. Azevedo","doi":"10.1590/2318-0331.272220210082","DOIUrl":"https://doi.org/10.1590/2318-0331.272220210082","url":null,"abstract":"Abstract Photodegradation is an important process for aquatic metabolism, related to the dissolved organic matter (DOM) transformation in water. For example, in a water supply reservoir, DOM is an important parameter since it can react and form disinfection by-products during water treatment. Thus, the understanding and determination of photodegradation rates are especially relevant for water resources management since they can influence DOM transformation in the water column. However, besides its relevance, few studies were conducted in the southern hemisphere for photodegradation rates determination. Therefore, we carried out field experiments to characterize and evaluate DOM photodegradation rate ‒ at different depths and in two solar irradiation periods ‒ through the application of absorption spectroscopy techniques in the UV-Vis region and fluorescence excitation-emission matrices (EEM) combined with the dissolved organic carbon (DOC) measurement. Low concentrations of natural DOM and nutrients in the aquatic environment were measured during the field monitoring. Our results indicate that photodegradation rates for a temperate oceanic climate reservoir were proportional to the availability of solar radiation, being more representative considering the time scale.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"172 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85766234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220035
M. Lucas, Gustavo Bonfim Jodas, L. E. Bertotto, P. T. S. Oliveira, Alessandro Bail
ABSTRACT Curve Number (CN) values estimating from rainfall-runoff data is an attractive topic in hydrology. However, CN values are lacking for Interlocking Concrete Pavement (ICP) material, mainly when seated over bare soil (not over a permeable pavement structure). Here, we compute CN values for the ICP seated over clayey soil using measured rainfall and infiltration capacity data. We estimated runoff ( Q) using 32 events of 24-hour rainfall depth ( P 24) and an infiltration model, assuming a hortonian runoff process. To estimate the CN for each P 24 event, we used the rainfall-runoff incremental approach. Overall, we obtained CN values ranging from 52 to 63. The best CN values to estimate Q were equal to 52.2 ( R M S E = 9.09 mm and R 2 = 0.03) and 60.1 ( R M S E = 1.45 mm and R 2 = 0.97), considering natural- and rank-ordered P 24- Q data, respectively. Our results indicate that it is more suitable to use the initial abstraction ratio ( λ) equal to 0.20 for the ICP material. The findings provide a better understanding of the rainfall-runoff process in ICP and help improve the design of stormwater drainage systems.
摘要利用降雨径流数据估算曲线数(CN)值是水文学研究中一个有吸引力的课题。然而，联锁混凝土路面(ICP)材料缺乏CN值，主要是在裸露的土壤上(而不是在透水的路面结构上)。在这里，我们使用测量的降雨量和入渗能力数据计算粘土土壤上ICP的CN值。我们使用32个24小时降雨深度事件(p24)和一个入渗模型来估计径流(Q)，假设径流过程是霍顿式的。为了估计每个p24事件的CN，我们使用了降雨-径流增量方法。总的来说，我们得到的CN值在52到63之间。考虑自然排序和排序排序的p24 - Q数据，估计Q的最佳CN值分别为52.2 (R M S E = 9.09 mm, r2 = 0.03)和60.1 (R M S E = 1.45 mm, r2 = 0.97)。我们的结果表明，对于ICP材料，使用初始抽象比(λ) = 0.20更为合适。这些发现有助于更好地理解ICP的降雨径流过程，并有助于改进雨水排水系统的设计。
{"title":"Curve number for runoff estimating in interlocking concrete pavement","authors":"M. Lucas, Gustavo Bonfim Jodas, L. E. Bertotto, P. T. S. Oliveira, Alessandro Bail","doi":"10.1590/2318-0331.272220220035","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220035","url":null,"abstract":"ABSTRACT Curve Number (CN) values estimating from rainfall-runoff data is an attractive topic in hydrology. However, CN values are lacking for Interlocking Concrete Pavement (ICP) material, mainly when seated over bare soil (not over a permeable pavement structure). Here, we compute CN values for the ICP seated over clayey soil using measured rainfall and infiltration capacity data. We estimated runoff ( Q) using 32 events of 24-hour rainfall depth ( P 24) and an infiltration model, assuming a hortonian runoff process. To estimate the CN for each P 24 event, we used the rainfall-runoff incremental approach. Overall, we obtained CN values ranging from 52 to 63. The best CN values to estimate Q were equal to 52.2 ( R M S E = 9.09 mm and R 2 = 0.03) and 60.1 ( R M S E = 1.45 mm and R 2 = 0.97), considering natural- and rank-ordered P 24- Q data, respectively. Our results indicate that it is more suitable to use the initial abstraction ratio ( λ) equal to 0.20 for the ICP material. The findings provide a better understanding of the rainfall-runoff process in ICP and help improve the design of stormwater drainage systems.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"18 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80939201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220056
Teresa Elane Bezerra Luz, Mariana Kummer da Rocha Pinheiro, A. Scudelari, C. Cunha
ABSTRACT The Mundaú-Manguaba Estuary Lagoon Complex (CELMM), located on the coast of Alagoas state in Northeastern Brazil, consists of two choked coastal lagoons connected to the Atlantic Ocean by a series of narrow channels, establishing a single tidal inlet, which dynamically alters their position. This study uses the modeling system SisBaHiA® (in Portuguese, Sistema Hidrodinâmico Ambiental) and Trophic Index (TRIX) to evaluate how morphological changes in the CELMM can influence the water quality of the lagoons. The results showed that water quality is mainly influenced by river discharge regimes, with no major changes in the region of the tidal inlet for the three simulated years (2006, 2014 and 2017). Trophic index showed greater changes in the rainy season, with a decline in values as river discharge increases, mainly in the northwest and central portions of the Mundaú Lagoon. In the Manguaba Lagoon an opposite pattern was found, namely a rise in the Trophic index with increased river discharges.
{"title":"Effects of different tidal inlet configurations on the water quality of an estuary lagoon complex in northeastern Brazil","authors":"Teresa Elane Bezerra Luz, Mariana Kummer da Rocha Pinheiro, A. Scudelari, C. Cunha","doi":"10.1590/2318-0331.272220220056","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220056","url":null,"abstract":"ABSTRACT The Mundaú-Manguaba Estuary Lagoon Complex (CELMM), located on the coast of Alagoas state in Northeastern Brazil, consists of two choked coastal lagoons connected to the Atlantic Ocean by a series of narrow channels, establishing a single tidal inlet, which dynamically alters their position. This study uses the modeling system SisBaHiA® (in Portuguese, Sistema Hidrodinâmico Ambiental) and Trophic Index (TRIX) to evaluate how morphological changes in the CELMM can influence the water quality of the lagoons. The results showed that water quality is mainly influenced by river discharge regimes, with no major changes in the region of the tidal inlet for the three simulated years (2006, 2014 and 2017). Trophic index showed greater changes in the rainy season, with a decline in values as river discharge increases, mainly in the northwest and central portions of the Mundaú Lagoon. In the Manguaba Lagoon an opposite pattern was found, namely a rise in the Trophic index with increased river discharges.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"40 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88801996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220210127
Maycon Rodrigues da Silva, Igor Antônio de Paiva Brandão, M. Ribeiro
ABSTRACT Urban areas in semi-arid regions are under chronic water stress. In this scenario, expanding water supply with decentralized sources that collaborate with Water-Sensitive Urban Design (WSUD) may be relevant, such as rainwater harvesting (RWH) systems. In this respect, this study aimed to analyze the potential for the use of rainwater in public buildings in the Brazilian semi-arid region, integrating three aspects: environmental and economic feasibility, seasonality, and reliability. The results provide substantial evidence on the benefits of using rainwater, both from an environmental and an economic point of view. This use can significantly reduce the annual consumption of water from the public supply, which would reduce the demand from water bodies. It has also been found that there is considerable variation in the potable water savings potential throughout the year; the systems, however, still provide reliability.
{"title":"Feasibility, seasonality and reliability of rainwater harvesting in buildings of a university in Campina Grande, Paraíba","authors":"Maycon Rodrigues da Silva, Igor Antônio de Paiva Brandão, M. Ribeiro","doi":"10.1590/2318-0331.272220210127","DOIUrl":"https://doi.org/10.1590/2318-0331.272220210127","url":null,"abstract":"ABSTRACT Urban areas in semi-arid regions are under chronic water stress. In this scenario, expanding water supply with decentralized sources that collaborate with Water-Sensitive Urban Design (WSUD) may be relevant, such as rainwater harvesting (RWH) systems. In this respect, this study aimed to analyze the potential for the use of rainwater in public buildings in the Brazilian semi-arid region, integrating three aspects: environmental and economic feasibility, seasonality, and reliability. The results provide substantial evidence on the benefits of using rainwater, both from an environmental and an economic point of view. This use can significantly reduce the annual consumption of water from the public supply, which would reduce the demand from water bodies. It has also been found that there is considerable variation in the potable water savings potential throughout the year; the systems, however, still provide reliability.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89274314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220057
Jéssica Anastácia Alves, A. Siqueira, Eliana Freire Gaspar Dores, L. P. C. Bruno, Ibraim Fantin-Cruz
ABSTRACT This study evaluated the water sources at the points of water collection for human supply, identifying conventional and emerging pollutants that could compromise the public supply of the municipality of Cuiabá-MT. Raw water was analyzed at three water pumping sites, using secondary (2014 to 2019) and primary (June and November 2019) data. The parameters described in current regulations were used to calculate the Index of Conformity with the Guidelines, which assesses the distance between planned quality and measured quality. Drugs were discussed based on ecotoxicological studies. There was a reduction in the quality of water sources in the urbanized area, with the disposal of in natura domestic sewage and surface runoff as the most important causes of this reduction. Measures are needed to expand and ensure adequate and efficient collection and treatment of effluents, preventing pollutants from reaching rivers.
{"title":"Presence of emerging and conventional contaminants in water sources in the city of Cuiabá (MT): potential sources and damages","authors":"Jéssica Anastácia Alves, A. Siqueira, Eliana Freire Gaspar Dores, L. P. C. Bruno, Ibraim Fantin-Cruz","doi":"10.1590/2318-0331.272220220057","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220057","url":null,"abstract":"ABSTRACT This study evaluated the water sources at the points of water collection for human supply, identifying conventional and emerging pollutants that could compromise the public supply of the municipality of Cuiabá-MT. Raw water was analyzed at three water pumping sites, using secondary (2014 to 2019) and primary (June and November 2019) data. The parameters described in current regulations were used to calculate the Index of Conformity with the Guidelines, which assesses the distance between planned quality and measured quality. Drugs were discussed based on ecotoxicological studies. There was a reduction in the quality of water sources in the urbanized area, with the disposal of in natura domestic sewage and surface runoff as the most important causes of this reduction. Measures are needed to expand and ensure adequate and efficient collection and treatment of effluents, preventing pollutants from reaching rivers.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"25 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83279419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220045
K. S. Rautela, D. Kumar, B. G. R. Gandhi, Ajay Kumar, A. Dubey
ABSTRACT The estimation of stream discharge is an essential component of planning and decision-making. It is highly correlated with many development activities involving water resources. The study of transportation of sediments in the rivers will help us to develop policies and plans for soil conservation, flood control, irrigation, navigation, and aquatic biodiversity problems. Using data-driven models such as Artificial Neural Networks (ANNs), modeling of streamflow and sediment transport is frequently adopted due to their applicability and problem-solving ability. This study has used three training algorithms such as Scaled Conjugate Gradient (SCG), Bayesian Regularization (BR), and Levenberg-Marquardt (LM) to simulate the streamflow and Suspended Sediments Concentration (SSC). After optimizing the best training algorithm based on the model efficiency parameters, L-M based-ANN model has been used to predict streamflow for two years and the modeling of suspended sediments was validated with the help of observed data. The result shows that the simulated results tracked the streamflow as well as SSC with the desired accuracy based on the model efficiency parameters such as coefficient of Determination (R2), Nash Sutcliffe Efficiency (NSE), Root Mean Square Error (RMSE), and Root Mean Square Deviation (RMSD). The study's outcomes reveal that in the streamflow the concentration of suspended sediments is significantly affected by the base rock material, glaciers covered by debris, and moraine-laden ice. The transportation of the sediments is high in the Alaknanda basin as compared to the other basins and the previous studies. This might happen due to the severe anthropogenic activities in the surrounding basin.
{"title":"Application of ANNs for the modeling of streamflow, sediment transport, and erosion rate of a high-altitude river system in Western Himalaya, Uttarakhand","authors":"K. S. Rautela, D. Kumar, B. G. R. Gandhi, Ajay Kumar, A. Dubey","doi":"10.1590/2318-0331.272220220045","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220045","url":null,"abstract":"ABSTRACT The estimation of stream discharge is an essential component of planning and decision-making. It is highly correlated with many development activities involving water resources. The study of transportation of sediments in the rivers will help us to develop policies and plans for soil conservation, flood control, irrigation, navigation, and aquatic biodiversity problems. Using data-driven models such as Artificial Neural Networks (ANNs), modeling of streamflow and sediment transport is frequently adopted due to their applicability and problem-solving ability. This study has used three training algorithms such as Scaled Conjugate Gradient (SCG), Bayesian Regularization (BR), and Levenberg-Marquardt (LM) to simulate the streamflow and Suspended Sediments Concentration (SSC). After optimizing the best training algorithm based on the model efficiency parameters, L-M based-ANN model has been used to predict streamflow for two years and the modeling of suspended sediments was validated with the help of observed data. The result shows that the simulated results tracked the streamflow as well as SSC with the desired accuracy based on the model efficiency parameters such as coefficient of Determination (R2), Nash Sutcliffe Efficiency (NSE), Root Mean Square Error (RMSE), and Root Mean Square Deviation (RMSD). The study's outcomes reveal that in the streamflow the concentration of suspended sediments is significantly affected by the base rock material, glaciers covered by debris, and moraine-laden ice. The transportation of the sediments is high in the Alaknanda basin as compared to the other basins and the previous studies. This might happen due to the severe anthropogenic activities in the surrounding basin.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"93 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84030335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220046
J. C. G. Gutierrez, C. B. Caballero, Sofia Melo Vasconcellos, Franciele Maria Vanelli, J. Bravo
ABSTRACT Calibration of hydrologic models estimates parameter values that cannot be measured and enable the rainfall-runoff processes simulation. Multi-objective evolutionary algorithms can make the calibration faster and more efficient through an iterative process. However, the standard stopping criterion used to stop the iterative process is to reach a pre-defined number of iterations defined by the modeller. Alternatively, the Ticona stopping criterion is based on the minimum number of iterations required to achieve a determined number of non-dominated solutions in the Pareto front, resulting in a reduction of the computational time without losing performance during the calibration processes. We evaluated the Ticona stopping criterion in the Tank Model calibration. The calibration processes were performed using data from two river basins, with three genetic algorithms and two objective functions. The Ticona stopping criterion required a computational time 27.4% to 44.1% lower than using the standard stopping criterion and were obtaining similar results in simulated streamflow time series and similar values of the best set of parameters.
{"title":"Multi-objective calibration of Tank model using multiple genetic algorithms and stopping criteria","authors":"J. C. G. Gutierrez, C. B. Caballero, Sofia Melo Vasconcellos, Franciele Maria Vanelli, J. Bravo","doi":"10.1590/2318-0331.272220220046","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220046","url":null,"abstract":"ABSTRACT Calibration of hydrologic models estimates parameter values that cannot be measured and enable the rainfall-runoff processes simulation. Multi-objective evolutionary algorithms can make the calibration faster and more efficient through an iterative process. However, the standard stopping criterion used to stop the iterative process is to reach a pre-defined number of iterations defined by the modeller. Alternatively, the Ticona stopping criterion is based on the minimum number of iterations required to achieve a determined number of non-dominated solutions in the Pareto front, resulting in a reduction of the computational time without losing performance during the calibration processes. We evaluated the Ticona stopping criterion in the Tank Model calibration. The calibration processes were performed using data from two river basins, with three genetic algorithms and two objective functions. The Ticona stopping criterion required a computational time 27.4% to 44.1% lower than using the standard stopping criterion and were obtaining similar results in simulated streamflow time series and similar values of the best set of parameters.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"496 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77806579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220220028
Thais Magalhães Possa, W. Collischonn, P. Jardim, F. Fan
ABSTRACT The great flood of 1941 remains the most impactful and traumatic flood event in the history of Porto Alegre. This event was caused by a combination of heavy rainfall in the basin in the days prior to the peak of the flood, and the wind that occurred during the flood. However, the influence of wind on the maximum flood level, although frequently mentioned, is not well known. This is largely because there are no systematic data for wind speed measuring and direction in 1941. Therefore, the present work aims to estimate the discharge and the maximum flood level in the city of Porto Alegre and in other relevant points of the basin. using hydrological-hydrodynamic modeling and, from there, analyze the possible role of the wind during the flood, through the simulation of hypothetical wind scenarios. The results showed that the discharges and levels were represented reasonably well with the MGB model at several locations in the basin. In relation to the 1941 event and the scenarios created, the contribution of the wind to the peak of the flood was of the order of a few to tens of centimeters, showing its potential role despite the limitations of the model.
{"title":"Hydrological-hydrodynamic simulation and analysis of the possible influence of the wind in the extraordinary flood of 1941 in Porto Alegre","authors":"Thais Magalhães Possa, W. Collischonn, P. Jardim, F. Fan","doi":"10.1590/2318-0331.272220220028","DOIUrl":"https://doi.org/10.1590/2318-0331.272220220028","url":null,"abstract":"ABSTRACT The great flood of 1941 remains the most impactful and traumatic flood event in the history of Porto Alegre. This event was caused by a combination of heavy rainfall in the basin in the days prior to the peak of the flood, and the wind that occurred during the flood. However, the influence of wind on the maximum flood level, although frequently mentioned, is not well known. This is largely because there are no systematic data for wind speed measuring and direction in 1941. Therefore, the present work aims to estimate the discharge and the maximum flood level in the city of Porto Alegre and in other relevant points of the basin. using hydrological-hydrodynamic modeling and, from there, analyze the possible role of the wind during the flood, through the simulation of hypothetical wind scenarios. The results showed that the discharges and levels were represented reasonably well with the MGB model at several locations in the basin. In relation to the 1941 event and the scenarios created, the contribution of the wind to the peak of the flood was of the order of a few to tens of centimeters, showing its potential role despite the limitations of the model.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"96 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80378071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220210137
P. Drumond, P. Moura, T. Silva, Juliana Camargos Ramires, Lucas Rogério Vieira Silva
ABSTRACT To mitigate urbanization impacts on the hydrological cycle, Low Impact Development techniques, especially On-site Stormwater Detention - OSD, are applied worldwide. Besides their frequent use, the public knowledge about these techniques and stormwater management is insufficient, particularly in Latin America. Public comprehension about stormwater management and LID techniques lead to more acceptance and engagement. In this sense, the aim of this article is to present the results of interviews about local’s perception on stormwater management in Belo Horizonte/Brazil. The results indicate that males and respondents older than 40 years old have more knowledge about stormwater management, as well as higher socioeconomic interviewees. Although the use of OSD is positively perceived, a greater knowledge on urban stormwater does not lead to a greater willingness to co-participate in the stormwater management. Our results provide an overview of city inhabitants’ perception of municipal stormwater management and have great potential to help managers.
{"title":"Citizens’s perception on stormwater management and use of on-site stormwater detention in Belo Horizonte/Brazil","authors":"P. Drumond, P. Moura, T. Silva, Juliana Camargos Ramires, Lucas Rogério Vieira Silva","doi":"10.1590/2318-0331.272220210137","DOIUrl":"https://doi.org/10.1590/2318-0331.272220210137","url":null,"abstract":"ABSTRACT To mitigate urbanization impacts on the hydrological cycle, Low Impact Development techniques, especially On-site Stormwater Detention - OSD, are applied worldwide. Besides their frequent use, the public knowledge about these techniques and stormwater management is insufficient, particularly in Latin America. Public comprehension about stormwater management and LID techniques lead to more acceptance and engagement. In this sense, the aim of this article is to present the results of interviews about local’s perception on stormwater management in Belo Horizonte/Brazil. The results indicate that males and respondents older than 40 years old have more knowledge about stormwater management, as well as higher socioeconomic interviewees. Although the use of OSD is positively perceived, a greater knowledge on urban stormwater does not lead to a greater willingness to co-participate in the stormwater management. Our results provide an overview of city inhabitants’ perception of municipal stormwater management and have great potential to help managers.","PeriodicalId":54151,"journal":{"name":"RBRH-Revista Brasileira de Recursos Hidricos","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77274079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/2318-0331.272220210120
Alexandre de Amorim Teixeira, A. Silva, F. F. Pruski, Clodoveu Davis Jr, H. Roig, Noris Costa Diniz
ABSTRACT The coding basin system proposed by Pfafstetter (1989) is an important reference point and adopted by the principal water resources management system in the world. This adoption is due to the method’s simplicity and the topological relationship between the river stretches built-into the codes. Otherwise, the Pfafstetter basin coding system can only be applied in a hydrographic vector represented by an anti-arborescence binary graph. This type of representation causes loss of hydrographic information due to the simplification of regions where there are anabranching, braided or delta areas that implies multiple confluences, cycles or disruptions of the network. This paper proposes improvements to the Pfafstetter basin coding system, maintaining it simple, while keeping the topological relationship between the stretches and including the possibility to represent the hydrography with multiple confluences, cycles, delta mouths, sinks, water masses and disruptions to drainage.
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