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Pedro Luiz Borges Chaffe
Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil

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Journal article
Published: 22 June 2021 in Ocean & Coastal Management
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The implementation of sustainable spaces and infrastructure can offset environmental damage caused by urban land parceling of coastal plains. However, there is no clear methodology for the analysis and quantification of damage on coastal water bodies. In this paper, we provide a procedure for the identification of degraded urban rivers and the quantification of corresponding environmental damage according to Brazilian law. In Brazil, environmental legislation requires public authorities to consider the recovery or compensation of environmental liabilities in protected areas in the regularization of urban occupations. We use the Jurerê Coastal Plain located in Southern Brazil as a case study to analyze damage to the river bed and the riparian permanent preservation area (PPA). The suppression of the Meio and Faustino rivers occurred in several stages starting in the 1970s. Our analysis is subdivided into: (i) review of the evolution of environmental legislation protecting streams corridors over time; (ii) spatio-temporal analysis of land use from historical cartographic documents, obtaining accurate topographic data to assist in the identification of the river beds; and (iii) quantification of the suppressed PPA according to the legislation in force at the time of the implementation of urban land parceling. The procedure developed here contributes to the quantification of the environmental liabilities of other urban occupations and may be used to determine the compensatory environmental measures which are effectively bound to the corresponding damaged area.

ACS Style

Kleber Isaac Silva de Souza; Pedro Luiz Borges Chaffe; Tadeu Maia Portela Nogueira; Cátia Regina Silva De Carvalho Pinto. Environmental damage of urbanized stream corridors in a coastal plain in Southern Brazil. Ocean & Coastal Management 2021, 211, 105739 .

AMA Style

Kleber Isaac Silva de Souza, Pedro Luiz Borges Chaffe, Tadeu Maia Portela Nogueira, Cátia Regina Silva De Carvalho Pinto. Environmental damage of urbanized stream corridors in a coastal plain in Southern Brazil. Ocean & Coastal Management. 2021; 211 ():105739.

Chicago/Turabian Style

Kleber Isaac Silva de Souza; Pedro Luiz Borges Chaffe; Tadeu Maia Portela Nogueira; Cátia Regina Silva De Carvalho Pinto. 2021. "Environmental damage of urbanized stream corridors in a coastal plain in Southern Brazil." Ocean & Coastal Management 211, no. : 105739.

Editorial
Published: 13 March 2021 in Remote Sensing
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Water is undoubtedly the most valuable resource of human society and an essential component of the ecosystem

ACS Style

Weili Duan; Shreedhar Maskey; Pedro Chaffe; Pingping Luo; Bin He; Yiping Wu; Jingming Hou. Recent Advancement in Remote Sensing Technology for Hydrology Analysis and Water Resources Management. Remote Sensing 2021, 13, 1097 .

AMA Style

Weili Duan, Shreedhar Maskey, Pedro Chaffe, Pingping Luo, Bin He, Yiping Wu, Jingming Hou. Recent Advancement in Remote Sensing Technology for Hydrology Analysis and Water Resources Management. Remote Sensing. 2021; 13 (6):1097.

Chicago/Turabian Style

Weili Duan; Shreedhar Maskey; Pedro Chaffe; Pingping Luo; Bin He; Yiping Wu; Jingming Hou. 2021. "Recent Advancement in Remote Sensing Technology for Hydrology Analysis and Water Resources Management." Remote Sensing 13, no. 6: 1097.

Special issue paper
Published: 13 February 2021 in Hydrological Processes
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The Peri Lake Experimental Catchment, in Southern Brazil, is a small coastal lake (5km2, 7 m depth) with a total catchment area of 20 km2. The catchment is mainly covered by subtropical Atlantic Forest. Peri Lake is a recreational destination, an important ecosystem for biodiversity preservation, and a major water supply source. Even though there is a clear social and economic relevance, the information on this ecosystem is scarce, especially regarding the dynamics of water balance and water quality. We built this observatory using a low‐cost, low‐technology monitoring system to estimate the major components of the water budget on what we called a critical budget. We monitor meteorology, rainfall interception in two plots, overland flow and groundwater connectivity in a representative hillslope; and streamflow and velocity are measured in several small headwater rivers mostly starting during 2015. Geographic information on topography, land cover, geology, soil characteristics and the location of all the equipment installed in the field are also provided. The data set can be used to understand rainfall interception in Atlantic forests, catchment connectivity and streamflow permanence in coastal areas, spatial patterns of baseflow, and the modelling of complex processes in the critical zone involving the interaction between surface and groundwater, that are important in coastal lake ecosystems. Besides being used for research and education, we hope this observatory built on a shoestring budget will encourage fieldwork particularly in underrepresented and underfunded regions of the world. This article is protected by copyright. All rights reserved.

ACS Style

Pedro Luiz Borges Chaffe; Camyla Innocente dos Santos; Alondra Beatriz Alvarez Perez; João Henrique Macedo Sá; Tomas Carlotto; Leonardo Hoinaski. Observing the critical zone on a critical budget: The Peri Lake experimental catchment. Hydrological Processes 2021, 35, 1 .

AMA Style

Pedro Luiz Borges Chaffe, Camyla Innocente dos Santos, Alondra Beatriz Alvarez Perez, João Henrique Macedo Sá, Tomas Carlotto, Leonardo Hoinaski. Observing the critical zone on a critical budget: The Peri Lake experimental catchment. Hydrological Processes. 2021; 35 (3):1.

Chicago/Turabian Style

Pedro Luiz Borges Chaffe; Camyla Innocente dos Santos; Alondra Beatriz Alvarez Perez; João Henrique Macedo Sá; Tomas Carlotto; Leonardo Hoinaski. 2021. "Observing the critical zone on a critical budget: The Peri Lake experimental catchment." Hydrological Processes 35, no. 3: 1.

Journal article
Published: 01 January 2021 in RBRH
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The development of urban areas exacerbates flood risk by increasing both runoff and the exposure of population and infrastructure. In this study, we highlight the importance of return period choice on flood hazard degree and flood hydraulics characteristics. We use the UFSC campus basin as a test bed and combine a hydrological and a hydrodynamic model to define the flood hazard intensity and flood hazard degree. Six hazard intensity maps were elaborated using different return periods (2, 10, 25, 50, 100 and 500-years) that characterize low and high recurrence scenarios. The low recurrence hazard map can be ideal to verify hazard effects on buildings, while the high recurrence hazard map helps to identify people security. All variables related to the rainfall effect and its consequences (e.g. rainfall intensity, flood mean velocity, and total flood area) follow a logarithmic relationship, with a small variation for higher return periods. We highlight how different return periods can influence flood hydraulics and flood hazard and should therefore be considered in flood hazard mapping.

ACS Style

Leonardo Romero Monteiro; Camyla Innocente dos Santos; Masato Kobiyama; Cláudia Weber Corseuil; Pedro Luiz Borges Chaffe. Effects of return periods on flood hazard mapping: an analysis of the UFSC Campus Basin, Florianópolis city, Brazil. RBRH 2021, 26, 1 .

AMA Style

Leonardo Romero Monteiro, Camyla Innocente dos Santos, Masato Kobiyama, Cláudia Weber Corseuil, Pedro Luiz Borges Chaffe. Effects of return periods on flood hazard mapping: an analysis of the UFSC Campus Basin, Florianópolis city, Brazil. RBRH. 2021; 26 ():1.

Chicago/Turabian Style

Leonardo Romero Monteiro; Camyla Innocente dos Santos; Masato Kobiyama; Cláudia Weber Corseuil; Pedro Luiz Borges Chaffe. 2021. "Effects of return periods on flood hazard mapping: an analysis of the UFSC Campus Basin, Florianópolis city, Brazil." RBRH 26, no. : 1.

Journal article
Published: 01 January 2021 in RBRH
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The quantification of baseflow is key for water resources management. However, there are few reports on the precision and accuracy in low streamflow measurements. In this paper, we systematically analyze the precision and accuracy of dilution streamflow measurements in headwater channels during baseflow. Precision refers to the variability of the values for repeated measurements and accuracy is how much the measured value approximates the reference one. We measured streamflow in 31 different cross-sections with contributing areas ranging from 0.02 to 5.33 km2. Streamflow measurements with the current meter were adopted as reference for accuracy estimation. A precision error of ±5.0% was found for the measurements. The percent errors compared to reference streamflow ranged from 0.7 to 45.6%, with a median of 6.1%. Precision and accuracy are in the same order of magnitude found in the literature for larger streams. These results can be used for constraining the uncertainty of streamflow measurements and rainfall-runoff modeling of headwater streams.

ACS Style

Camyla Innocente dos Santos; Pedro Luiz Borges Chaffe; Alondra Beatriz Alvarez Perez; Pedro Ferreira Arienti; João Henrique Macedo Sá. Precision and accuracy of streamflow measurements in headwater streams during baseflow. RBRH 2021, 26, 1 .

AMA Style

Camyla Innocente dos Santos, Pedro Luiz Borges Chaffe, Alondra Beatriz Alvarez Perez, Pedro Ferreira Arienti, João Henrique Macedo Sá. Precision and accuracy of streamflow measurements in headwater streams during baseflow. RBRH. 2021; 26 ():1.

Chicago/Turabian Style

Camyla Innocente dos Santos; Pedro Luiz Borges Chaffe; Alondra Beatriz Alvarez Perez; Pedro Ferreira Arienti; João Henrique Macedo Sá. 2021. "Precision and accuracy of streamflow measurements in headwater streams during baseflow." RBRH 26, no. : 1.

Data description paper
Published: 08 September 2020 in Earth System Science Data
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We introduce a new catchment dataset for large-sample hydrological studies in Brazil. This dataset encompasses daily time series of observed streamflow from 3679 gauges, as well as meteorological forcing (precipitation, evapotranspiration, and temperature) for 897 selected catchments. It also includes 65 attributes covering a range of topographic, climatic, hydrologic, land cover, geologic, soil, and human intervention variables, as well as data quality indicators. This paper describes how the hydrometeorological time series and attributes were produced, their primary limitations, and their main spatial features. To facilitate comparisons with catchments from other countries, the data follow the same standards as the previous CAMELS (Catchment Attributes and MEteorology for Large-sample Studies) datasets for the United States, Chile, and Great Britain. CAMELS-BR (Brazil) complements the other CAMELS datasets by providing data for hundreds of catchments in the tropics and the Amazon rainforest. Importantly, precipitation and evapotranspiration uncertainties are assessed using several gridded products, and quantitative estimates of water consumption are provided to characterize human impacts on water resources. By extracting and combining data from these different data products and making CAMELS-BR publicly available, we aim to create new opportunities for hydrological research in Brazil and facilitate the inclusion of Brazilian basins in continental to global large-sample studies. We envision that this dataset will enable the community to gain new insights into the drivers of hydrological behavior, better characterize extreme hydroclimatic events, and explore the impacts of climate change and human activities on water resources in Brazil. The CAMELS-BR dataset is freely available at https://doi.org/10.5281/zenodo.3709337 (Chagas et al., 2020).

ACS Style

Vinícius B. P. Chagas; Pedro L. B. Chaffe; Nans Addor; Fernando M. Fan; Ayan S. Fleischmann; Rodrigo C. D. Paiva; Vinícius A. Siqueira. CAMELS-BR: hydrometeorological time series and landscape attributes for 897 catchments in Brazil. Earth System Science Data 2020, 12, 2075 -2096.

AMA Style

Vinícius B. P. Chagas, Pedro L. B. Chaffe, Nans Addor, Fernando M. Fan, Ayan S. Fleischmann, Rodrigo C. D. Paiva, Vinícius A. Siqueira. CAMELS-BR: hydrometeorological time series and landscape attributes for 897 catchments in Brazil. Earth System Science Data. 2020; 12 (3):2075-2096.

Chicago/Turabian Style

Vinícius B. P. Chagas; Pedro L. B. Chaffe; Nans Addor; Fernando M. Fan; Ayan S. Fleischmann; Rodrigo C. D. Paiva; Vinícius A. Siqueira. 2020. "CAMELS-BR: hydrometeorological time series and landscape attributes for 897 catchments in Brazil." Earth System Science Data 12, no. 3: 2075-2096.

Journal article
Published: 25 August 2020 in Environmental Modelling & Software
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The impact of climate change on water resources is one of the major challenges of our society. Synthesis work is essential to tackle these challenges in a scientifically sound way. Synthesis assessments can benefit from interactive web applications that allow easy access, managing, and updating of its database. We developed a web-based tool for the synthesis assessment of the impacts of climate change on the water resources of Brazil. The tool, called YARA, allows users to interact with the literature database and extract information of interest, all in an updatable fashion. YARA was tested by 107 stakeholders and several improvements were suggested and implemented, such as an interactive table and a form for registering new studies. The survey confirmed the value of YARA and we believe the tool is an important step to support robust adaptation strategies towards a more resilient society.

ACS Style

Pablo Borges de Amorim; Kleber Isaac Silva de Souza; Pedro Luiz Borges Chaffe. A web-based tool for synthesis assessments of the impacts of climate change on water resources. Environmental Modelling & Software 2020, 133, 104848 .

AMA Style

Pablo Borges de Amorim, Kleber Isaac Silva de Souza, Pedro Luiz Borges Chaffe. A web-based tool for synthesis assessments of the impacts of climate change on water resources. Environmental Modelling & Software. 2020; 133 ():104848.

Chicago/Turabian Style

Pablo Borges de Amorim; Kleber Isaac Silva de Souza; Pedro Luiz Borges Chaffe. 2020. "A web-based tool for synthesis assessments of the impacts of climate change on water resources." Environmental Modelling & Software 133, no. : 104848.

Journal article
Published: 12 June 2020 in Water Science and Technology
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This work is a review of the use of hysteresis to quantify sediment discharge dynamics. We reviewed 71 journal articles from the year 1953 to the present day focusing on two topics: the factors that influence hysteresis; and hysteresis quantification. The main factors influencing hysteresis are: (a) magnitude and sequence of events; (b) sediment particle size distribution; (c) basin size; and (d) land use and sediment source. Hysteresis quantification can be done using several different methods that can be grouped as: (a) hysteresis indexes; (b) statistical analysis; and (c) uncertainty analysis. Most studies were conducted in Western Europe and the USA. The studies, in general, show how the factors listed above influence the shape and patterns of hysteresis. However, the sediment dynamics are complex, and the hysteresis patterns may be linked to many other factors, such as slope and drainage systems. The quantification of hysteresis still appears, mainly with the hysteresis index and statistical analysis. Therefore, there are still many many other factors that influence hysteresis patterns, as well as hysteresis rates and uncertainty analyses.

ACS Style

Simone Malutta; Masato Kobiyama; Pedro Luiz Borges Chaffe; Nadia Bernardi Bonumá. Hysteresis analysis to quantify and qualify the sediment dynamics: state of the art. Water Science and Technology 2020, 81, 1 .

AMA Style

Simone Malutta, Masato Kobiyama, Pedro Luiz Borges Chaffe, Nadia Bernardi Bonumá. Hysteresis analysis to quantify and qualify the sediment dynamics: state of the art. Water Science and Technology. 2020; 81 (12):1.

Chicago/Turabian Style

Simone Malutta; Masato Kobiyama; Pedro Luiz Borges Chaffe; Nadia Bernardi Bonumá. 2020. "Hysteresis analysis to quantify and qualify the sediment dynamics: state of the art." Water Science and Technology 81, no. 12: 1.

Journal article
Published: 27 May 2020 in Water
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Stream network extension and contraction depend on landscape features and the characteristics of precipitation events. Although this dependency is widely recognized, the interaction among overland-flow generation processes, drainage active length, and frequency in temporary streams remains less understood. We studied a forest headwater catchment with wide variation in soil depth to investigate the runoff generation processes that lead to the occurrence of ephemeral and intermittent flow and connectivity between hillslope and outlet. We used low-cost equipment to monitor the variation in the length of the active drainage network and to measure the water table development. The flow in the channels can develop even under light rainfall conditions, while the connectivity is controlled by antecedent wetness, total precipitation, and active contribution area thresholds. Runoff permanence and fragmentation were related to soil depth variation; flow being usually more disconnected due to deeper water tables in deeper soil locations. Our findings emphasized the impact of soil structure on runoff generation in hillslopes and can be useful in the management of the most active areas and their impact on the quality of available water.

ACS Style

Alondra B. A. Perez; Camyla Innocente Dos Santos; João H. M. Sá; Pedro F. Arienti; Pedro L. B. Chaffe. Connectivity of Ephemeral and Intermittent Streams in a Subtropical Atlantic Forest Headwater Catchment. Water 2020, 12, 1526 .

AMA Style

Alondra B. A. Perez, Camyla Innocente Dos Santos, João H. M. Sá, Pedro F. Arienti, Pedro L. B. Chaffe. Connectivity of Ephemeral and Intermittent Streams in a Subtropical Atlantic Forest Headwater Catchment. Water. 2020; 12 (6):1526.

Chicago/Turabian Style

Alondra B. A. Perez; Camyla Innocente Dos Santos; João H. M. Sá; Pedro F. Arienti; Pedro L. B. Chaffe. 2020. "Connectivity of Ephemeral and Intermittent Streams in a Subtropical Atlantic Forest Headwater Catchment." Water 12, no. 6: 1526.

Journal article
Published: 01 January 2020 in RBRH
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In this paper we synthesize the special sessions of the XXIII Brazilian Water Resources Symposium 2019 in order to understand the major advances and challenges in the water sciences in Brazil. We analyzed more than 250 papers and presentations of 16 special sessions covering topics of Climate Variability and Change, Disasters, Modeling, Large Scale Hydrology, Remote Sensing, Education, and Water Resources Management. This exercise highlighted the unique diversity of natural and human water features in Brazil, that offers a great opportunity for understanding coupled hydrological and societal systems. Most contributions were related to methods and the quantification of water phenomena, therefore, there is a clear necessity for fostering more research on phenomena comprehension. There is a vast network of co-authorship among institutions but mostly from academia and with some degree of regional fragmentation. The ABRhidro community now has the challenge to enhance its collaboration network, the culture of synthesis analysis, and to build a common agenda for water resources research. It is also time for us to be aligned with the international water science community and to use our experiences to actively contribute to the tackling of global water issues.

ACS Style

Rodrigo Cauduro Dias de Paiva; Pedro Luiz Borges Chaffe; Jamil Alexandre Ayach Anache; Andrea Sousa Fontes; Ligia Maria Nascimento de Araujo; Anderson Nascimento de Araujo; Daniel Bartiko; Tobias Bleninger; Pablo Borges de Amorim; Diogo Costa Buarque; Tomas Carlotto; Walter Collischonn; Daniel Henrique Marco Detzel; Fernando Mainardi Fan; Rosa Maria Formiga-Johnsson; Masato Kobiyama; Michael Mannich; Guilherme Marques; Gean Paulo Michel; Debora Yumi de Oliveira; Paulo Tarso Sanches de Oliveira; Adilson Pinheiro; Anderson Ruhoff; Vinicius Alencar Siqueira; Rutineia Tassi; Franciele Zanandrea. Advances and challenges in the water sciences in Brazil: a community synthesis of the XXIII Brazilian Water Resources Symposium. RBRH 2020, 25, 1 .

AMA Style

Rodrigo Cauduro Dias de Paiva, Pedro Luiz Borges Chaffe, Jamil Alexandre Ayach Anache, Andrea Sousa Fontes, Ligia Maria Nascimento de Araujo, Anderson Nascimento de Araujo, Daniel Bartiko, Tobias Bleninger, Pablo Borges de Amorim, Diogo Costa Buarque, Tomas Carlotto, Walter Collischonn, Daniel Henrique Marco Detzel, Fernando Mainardi Fan, Rosa Maria Formiga-Johnsson, Masato Kobiyama, Michael Mannich, Guilherme Marques, Gean Paulo Michel, Debora Yumi de Oliveira, Paulo Tarso Sanches de Oliveira, Adilson Pinheiro, Anderson Ruhoff, Vinicius Alencar Siqueira, Rutineia Tassi, Franciele Zanandrea. Advances and challenges in the water sciences in Brazil: a community synthesis of the XXIII Brazilian Water Resources Symposium. RBRH. 2020; 25 ():1.

Chicago/Turabian Style

Rodrigo Cauduro Dias de Paiva; Pedro Luiz Borges Chaffe; Jamil Alexandre Ayach Anache; Andrea Sousa Fontes; Ligia Maria Nascimento de Araujo; Anderson Nascimento de Araujo; Daniel Bartiko; Tobias Bleninger; Pablo Borges de Amorim; Diogo Costa Buarque; Tomas Carlotto; Walter Collischonn; Daniel Henrique Marco Detzel; Fernando Mainardi Fan; Rosa Maria Formiga-Johnsson; Masato Kobiyama; Michael Mannich; Guilherme Marques; Gean Paulo Michel; Debora Yumi de Oliveira; Paulo Tarso Sanches de Oliveira; Adilson Pinheiro; Anderson Ruhoff; Vinicius Alencar Siqueira; Rutineia Tassi; Franciele Zanandrea. 2020. "Advances and challenges in the water sciences in Brazil: a community synthesis of the XXIII Brazilian Water Resources Symposium." RBRH 25, no. : 1.

Review
Published: 13 August 2019 in Hydrological Sciences Journal
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ACS Style

Tássia Mattos Brighenti; Nadia Bernardi Bonumá; Raghavan Srinivasan; Pedro Luiz Borges Chaffe. Simulating sub-daily hydrological process with SWAT: a review. Hydrological Sciences Journal 2019, 64, 1415 -1423.

AMA Style

Tássia Mattos Brighenti, Nadia Bernardi Bonumá, Raghavan Srinivasan, Pedro Luiz Borges Chaffe. Simulating sub-daily hydrological process with SWAT: a review. Hydrological Sciences Journal. 2019; 64 (12):1415-1423.

Chicago/Turabian Style

Tássia Mattos Brighenti; Nadia Bernardi Bonumá; Raghavan Srinivasan; Pedro Luiz Borges Chaffe. 2019. "Simulating sub-daily hydrological process with SWAT: a review." Hydrological Sciences Journal 64, no. 12: 1415-1423.

Articles
Published: 10 June 2019 in Hydrological Sciences Journal
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Brazil has some of the largest rivers in the world and has the second greatest flood loss potential among the emergent countries. Despite that, flood studies in this area are still scarce. In this paper, we used flood seasonality and trend analysis at the annual and seasonal scales in order to describe flood regimes and changes across the whole of Brazil in the period 1976–2015. We identified a strong seasonality of floods and a well-defined spatio-temporal pattern for flood occurrence. There are positive trends in the frequency and magnitude of floods in the North, South and parts of Southeast Brazil; and negative trends in the Northeast and the remainder of Southeast Brazil. Trends in the magnitude (frequency) were predominant in the winter (summer). Overall, floods are becoming more frequent and intense in Brazilian regions characterized by wet conditions, and less frequent and intense in drier regions.

ACS Style

D. Bartiko; D. Y. Oliveira; N. B. Bonumá; P. L. B. Chaffe. Spatial and seasonal patterns of flood change across Brazil. Hydrological Sciences Journal 2019, 64, 1071 -1079.

AMA Style

D. Bartiko, D. Y. Oliveira, N. B. Bonumá, P. L. B. Chaffe. Spatial and seasonal patterns of flood change across Brazil. Hydrological Sciences Journal. 2019; 64 (9):1071-1079.

Chicago/Turabian Style

D. Bartiko; D. Y. Oliveira; N. B. Bonumá; P. L. B. Chaffe. 2019. "Spatial and seasonal patterns of flood change across Brazil." Hydrological Sciences Journal 64, no. 9: 1071-1079.

Article
Published: 08 May 2019 in Climatic Change
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The Intergovernmental Panel on Climate Change (IPCC) has put a lot of efforts to describe uncertainties and to judge the confidence level of its major conclusions. Despite a guidance to communicate uncertainty, the assignment of confidence is not sufficiently clear and, thus, hard to be reproduced by the extern community. By conducting a synthesis assessment about the impacts of climate change on the Brazilian water resources, we identified an opportunity to illustrate the characterization of evidence as adopted in IPCC reports. We propose a method to describe the evidence from model outputs wherein the quality and amount of studies, as well as the consistency among their conclusions, are subject of a transparent rating procedure. In summary, the more comprehensive the study in sampling uncertainties, the higher its quality. Likewise, the amount and consistency among conclusions is assigned in a systematic way. The method is applied for synthesizing a collection of 42 peer-reviewed articles. It reveals important aspects about the evidence of the potential impacts of climate change in the Brazilian water resources, such as changes into a drier hydrological regime. However, the use of multi-model ensemble, the evaluation of models, and the observational data is limited. The proposed method enables consistent communication of the degree of evidence in a transparent, traceable, and comprehensive fashion. The method can be used as a tool to support experts on their judgment. The approach is reproducible and can guide synthesis work not only in Brazil but anywhere else.

ACS Style

Pablo Borges de Amorim; Pedro B. Chaffe. Towards a comprehensive characterization of evidence in synthesis assessments: the climate change impacts on the Brazilian water resources. Climatic Change 2019, 155, 37 -57.

AMA Style

Pablo Borges de Amorim, Pedro B. Chaffe. Towards a comprehensive characterization of evidence in synthesis assessments: the climate change impacts on the Brazilian water resources. Climatic Change. 2019; 155 (1):37-57.

Chicago/Turabian Style

Pablo Borges de Amorim; Pedro B. Chaffe. 2019. "Towards a comprehensive characterization of evidence in synthesis assessments: the climate change impacts on the Brazilian water resources." Climatic Change 155, no. 1: 37-57.

Articles
Published: 12 March 2019 in Hydrological Sciences Journal
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This study shows how the use of increasing model complexity allows us to hypothesize about dominant streamflow mechanisms in two small Brazilian forested basins. Nine different structures from the SUPERFLEX, an objective framework to systematically increase hydrological model complexity, were tested and we extended the flexible modelling methodology to error models as well. We show that applying a rigorous methodology in a model evaluation framework, with residual analysis and control of model complexity, is essential for testing a model as a hypothesis for dominant hydrologic controls. Our results indicate that the model architecture was more important than the increase in the number of model parameters. Better performing models were those with a parallel structure, which confirms our a priori belief about dominant runoff mechanisms of the studied catchments, characterized by a rapid response to rainfall, but also a constant river discharge fed by the water storage on the thick soil layer.

ACS Style

Paula C. David; Debora Y. Oliveira; Fernando Grison; Masato Kobiyama; Pedro L. B. Chaffe. Systematic increase in model complexity helps to identify dominant streamflow mechanisms in two small forested basins. Hydrological Sciences Journal 2019, 64, 455 -472.

AMA Style

Paula C. David, Debora Y. Oliveira, Fernando Grison, Masato Kobiyama, Pedro L. B. Chaffe. Systematic increase in model complexity helps to identify dominant streamflow mechanisms in two small forested basins. Hydrological Sciences Journal. 2019; 64 (4):455-472.

Chicago/Turabian Style

Paula C. David; Debora Y. Oliveira; Fernando Grison; Masato Kobiyama; Pedro L. B. Chaffe. 2019. "Systematic increase in model complexity helps to identify dominant streamflow mechanisms in two small forested basins." Hydrological Sciences Journal 64, no. 4: 455-472.

Journal article
Published: 14 January 2019 in Águas Subterrâneas
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Apesar das nascentes e olhos d’água serem considerados como área de preservação permanente (APP) desde 1965, o legislador por meio da Lei nº 12.651, de 2012, retirou a proteção ambiental dos afloramentos intermitentes. Essa proteção foi restabelecida pelo Supremo Tribunal Federal em fevereiro de 2018. O conhecimento pela comunidade técnico-científica da nova interpretação jurídica fixada para o diagnóstico e proteção destas feições é fundamental para a realização de estudos ambientais. Este artigo apresenta a evolução histórica da legislação de proteção ambiental no entorno de afloramentos de águas subterrâneas no Brasil e suas lacunas técnicas atuais. Por meio de dois exemplos apresenta-se as lacunas na legislação regulatória quanto à delimitação precisa de nascentes e olhos d’água móveis ou sujeitos à variação sazonal de nível. Sem a definição científica clara, a delimitação precisa desta modalidade de APP pode ficar comprometida. Espera-se que o tema incentive trabalhos futuros para investigação de soluções que contribuam para o aperfeiçoamento da proteção e restauração de ecossistemas relacionados com a água.

ACS Style

Kleber Isaac Silva De Souza; Pedro Luiz Borges Chaffe; Catia Regina Silva De Carvalho Pinto; Tadeu Maia Portela Nogueira. Proteção ambiental de nascentes e afloramentos de água subterrânea no Brasil: histórico e lacunas técnicas atuais. Águas Subterrâneas 2019, 33, 76 -86.

AMA Style

Kleber Isaac Silva De Souza, Pedro Luiz Borges Chaffe, Catia Regina Silva De Carvalho Pinto, Tadeu Maia Portela Nogueira. Proteção ambiental de nascentes e afloramentos de água subterrânea no Brasil: histórico e lacunas técnicas atuais. Águas Subterrâneas. 2019; 33 (1):76-86.

Chicago/Turabian Style

Kleber Isaac Silva De Souza; Pedro Luiz Borges Chaffe; Catia Regina Silva De Carvalho Pinto; Tadeu Maia Portela Nogueira. 2019. "Proteção ambiental de nascentes e afloramentos de água subterrânea no Brasil: histórico e lacunas técnicas atuais." Águas Subterrâneas 33, no. 1: 76-86.

Journal article
Published: 01 January 2019 in RBRH
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Studies integrating climate modelling output into hydrological modelling have grown substantially in the last two decades worldwide; however, there has not been a systematic review about those applications in the Brazilian territory. The aim of this study is to identify how the scientific community has been dealing with the topic in Brazil. The study is based on a systematic review of available peer-reviewed literature. We identify regions and socioeconomic sectors of interest and propose a method to evaluate the methodological consistency of the studies with the current state-of-the-art. The review shows that the topic has grown substantially in this decade, reaching 63 documents until 2018. The sectors under highest concern are the hydropower and the drinking water supply. The Paraná and Atlântico Nordeste Oriental hydrographic regions received great attention; whereas the Atlântico Sudeste did not. In terms of methodology, the use of multi-model ensemble leaves room for improvement. The results suggest a lack of human resources and access to computational infrastructure to handle climate data. Given the current challenges that Brazilian science is facing, we suggest the synchronization of efforts among research institutions. This systematic review provides information to help guiding decision makers to improve the topic in Brazil.

ACS Style

Pablo Borges de Amorim; Pedro Luiz Borges Chaffe. Integrating climate models into hydrological modelling: What’s going on in Brazil? RBRH 2019, 24, 1 .

AMA Style

Pablo Borges de Amorim, Pedro Luiz Borges Chaffe. Integrating climate models into hydrological modelling: What’s going on in Brazil? RBRH. 2019; 24 ():1.

Chicago/Turabian Style

Pablo Borges de Amorim; Pedro Luiz Borges Chaffe. 2019. "Integrating climate models into hydrological modelling: What’s going on in Brazil?" RBRH 24, no. : 1.

Journal article
Published: 26 November 2018 in Ecological Engineering
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The proper estimation of streamflow (Q) and suspended sediment (SS) have important implications for sustainable water management. The Soil and Water Assessment Tool (SWAT) is a distributed, physically-based and dynamic model that integrates water quantity and quality routines. SWAT is considered an effective tool for assessing water and soil resources problems in a worldwide range of environmental conditions; however every hydrological model application is limited by the choices made in the calibration process. The aim of this paper was to assess the differences between the sequential and simultaneous calibration methods when simulating streamflow and suspended sediment with SWAT. We used the Sequential Uncertainty Fitting (SUFI-2) combined with SWAT for: (i) sensitivity analysis; (ii) parameter calibration using Q and SS data with a combined multi-site and multi-objective approaches; and (iii) evaluation of the differences in the estimated uncertainty of both calibration methods. Our results suggest that the simultaneous calibration was more accurate, especially for SS values with King-Gupta Efficiency (KGE) objective function. The simultaneous calibration was less time consuming and the sensitivity analysis indicated that it needed less parameters in the calibration process. The multi-site calibration method improved the model results in 3 out of 4 simulations of suspended sediment in the basin outlet.

ACS Style

Tássia Mattos Brighenti; Nadia Bernardi Bonumá; Fernando Grison; Aline De Almeida Mota; Masato Kobiyama; Pedro Luiz Borges Chaffe. Two calibration methods for modeling streamflow and suspended sediment with the swat model. Ecological Engineering 2018, 127, 103 -113.

AMA Style

Tássia Mattos Brighenti, Nadia Bernardi Bonumá, Fernando Grison, Aline De Almeida Mota, Masato Kobiyama, Pedro Luiz Borges Chaffe. Two calibration methods for modeling streamflow and suspended sediment with the swat model. Ecological Engineering. 2018; 127 ():103-113.

Chicago/Turabian Style

Tássia Mattos Brighenti; Nadia Bernardi Bonumá; Fernando Grison; Aline De Almeida Mota; Masato Kobiyama; Pedro Luiz Borges Chaffe. 2018. "Two calibration methods for modeling streamflow and suspended sediment with the swat model." Ecological Engineering 127, no. : 103-113.

Journal article
Published: 03 September 2018 in Water Resources Research
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The replacement of natural forests with agriculture is generally associated with modifications in the hydrological behavior of a basin. This is particularly notable in the tropics and subtropics. Southern Brazil is a region with extensive agricultural production, forest conservation, and a vast unexplored streamflow data despite substantial rainfall trends observed in recent decades. In this work, we explore trends in the streamflow regime in the majority of the monitored basins in Southern Brazil. Additionally, we evaluate if pristine forested basins and agricultural non‐forested basins have significantly different streamflow responses to changes in rainfall. We analyzed annual averages, maxima, minima, and seasonality of a 36‐year data set (1975‐2010) of 675 rainfall and 140 streamflow gauges. Results reveal that large trends are widespread in Southern Brazil, especially in basins with areas smaller than 10000 km2. Changes in the rainfall regime did not directly translate into changes in the streamflow regime. Changes in the annual maximum flow of forested basins were not statistically significant even when the annual average and maximum rainfall increased significantly. Correlations between changes in rainfall and streamflow for two indices, namely duration of low magnitude events and seasonality, were statistically significant (p<0.05) only for agricultural basins. The results indicate a higher propagation of hydrological changes through anthropogenically modified systems, providing evidence that agricultural basins are more sensitive to changes in the rainfall regime.

ACS Style

Vinícius B. P. Chagas; P. L. B. Chaffe. The Role of Land Cover in the Propagation of Rainfall Into Streamflow Trends. Water Resources Research 2018, 54, 5986 -6004.

AMA Style

Vinícius B. P. Chagas, P. L. B. Chaffe. The Role of Land Cover in the Propagation of Rainfall Into Streamflow Trends. Water Resources Research. 2018; 54 (9):5986-6004.

Chicago/Turabian Style

Vinícius B. P. Chagas; P. L. B. Chaffe. 2018. "The Role of Land Cover in the Propagation of Rainfall Into Streamflow Trends." Water Resources Research 54, no. 9: 5986-6004.

Article
Published: 23 March 2018 in Water Resources Research
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Proper uncertainty estimation for data series with a high proportion of zero and near zero observations has been a challenge in hydrologic studies. This technical note proposes a modification to the Generalized Likelihood function that accounts for zero inflation of the error distribution (ZI-GL). We compare the performance of the proposed ZI-GL with the original Generalized Likelihood function using the entire data series (GL) and by simply suppressing zero observations (GLy>0). These approaches were applied to two interception modeling examples characterized by data series with a significant number of zeros. The ZI-GL produced better uncertainty ranges than the GL as measured by the precision, reliability and volumetric bias metrics. The comparison between ZI-GL and GLy>0 highlights the need for further improvement in the treatment of residuals from near zero simulations when a linear heteroscedastic error model is considered. Aside from the interception modeling examples illustrated herein, the proposed ZI-GL may be useful for other hydrologic studies, such as for the modeling of the runoff generation in hillslopes and ephemeral catchments.

ACS Style

Debora Y. Oliveira; Pedro L. B. Chaffe; João H. M. Sá. Extending the Applicability of the Generalized Likelihood Function for Zero‐Inflated Data Series. Water Resources Research 2018, 54, 2494 -2506.

AMA Style

Debora Y. Oliveira, Pedro L. B. Chaffe, João H. M. Sá. Extending the Applicability of the Generalized Likelihood Function for Zero‐Inflated Data Series. Water Resources Research. 2018; 54 (3):2494-2506.

Chicago/Turabian Style

Debora Y. Oliveira; Pedro L. B. Chaffe; João H. M. Sá. 2018. "Extending the Applicability of the Generalized Likelihood Function for Zero‐Inflated Data Series." Water Resources Research 54, no. 3: 2494-2506.

Original articles
Published: 12 December 2017 in Hydrological Sciences Journal
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The Itajaí River basin is one of the areas most affected by flood-related disasters in Brazil. Flood hazard maps based on digital elevation models (DEM) are an important alternative in the absence of detailed hydrological data and for application in large areas. We developed a flood hazard mapping methodology by combining flow frequency analysis with the Height Above the Nearest Drainage (HAND) model – f2HAND – and applied it in three municipalities in the Itajaí River basin. The f2HAND performance was evaluated through comparison with observed 2011 flood extent maps. Model performance and sensitivity were tested for different DEM resolutions, return periods and streamflow data from stations located upstream and downstream on the main river. The flood hazard mapping with our combined approach matched 92% of the 2011 flood event. We found that the f2HAND model has low sensitivity to DEM resolution and high sensitivity to area threshold of channel initiation.

ACS Style

Gustavo Andrei Speckhann; Pedro Luiz Borges Chaffe; Roberto Fabris Goerl; Janete Josina De Abreu; Juan Antonio Altamirano Flores. Flood hazard mapping in Southern Brazil: a combination of flow frequency analysis and the HAND model. Hydrological Sciences Journal 2017, 63, 87 -100.

AMA Style

Gustavo Andrei Speckhann, Pedro Luiz Borges Chaffe, Roberto Fabris Goerl, Janete Josina De Abreu, Juan Antonio Altamirano Flores. Flood hazard mapping in Southern Brazil: a combination of flow frequency analysis and the HAND model. Hydrological Sciences Journal. 2017; 63 (1):87-100.

Chicago/Turabian Style

Gustavo Andrei Speckhann; Pedro Luiz Borges Chaffe; Roberto Fabris Goerl; Janete Josina De Abreu; Juan Antonio Altamirano Flores. 2017. "Flood hazard mapping in Southern Brazil: a combination of flow frequency analysis and the HAND model." Hydrological Sciences Journal 63, no. 1: 87-100.