Sly Wongchuig

Sly Wongchuig
Université Toulouse III-Paul Sabatier · Laboratoire d'études en géophysique et océanographie spatiales

PhD in Water Resources and Environmental Sanitation
Postdoc researcher at ECHOS team, LEGOS. Université Toulouse III-Paul Sabatier/ France

About

42
Publications
10,545
Reads
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332
Citations
Introduction
Postdoc researcher at IGE in the AMANECER project by MOPGA French initiative. PhD in Water Resources and Environmental Sanitation at the Institute of Hydraulic Research (IPH) from the Federal University of Rio Grande do Sul (UFRGS) in Brazil. Worked on developing methodologies to better estimation of spatio-temporal hydrologic variables through using large-scale hydrological-hydrodynamic modeling and data assimilation techniques of in-situ, remote sensing and/or synthetic SWOT observations.
Additional affiliations
August 2019 - present
University of Grenoble Alpes
Position
  • PostDoc Position
March 2015 - June 2019
Universidade Federal do Rio Grande do Sul
Position
  • PhD
Education
March 2015 - June 2019
Universidade Federal do Rio Grande do Sul
Field of study
  • Water Resources

Publications

Publications (42)
Article
The Amazon River basin harbors some of the world's largest wetland complexes, which are of major importance for biodiversity, the water cycle and climate, and human activities. Accurate estimates of inundation extent and its variations across spatial and temporal scales are therefore fundamental to understand and manage the basin's resources. More...
Article
Full-text available
Analyzing historical droughts is essential to improve the assessment of future hydrological risks and to understand the effects of climate variability on streamflow. However, prolonged and consistent hydrological time series are scarce in the Brazilian savanna region. This study aimed to analyze the performance of climate reanalysis products in pre...
Article
Satellite observations offer invaluable insights into hydrological processes and environmental change in the Amazon. The Amazon Basin is the largest river basin in the world. It covers roughly six million square kilometers, which is about one third of South America. While the sheer scale and difficulty of access makes field observations challengin...
Poster
Full-text available
The majority of deforestation modelling studies analyze the impacts of forest loss on atmospheric processes at climatological time scales. How deforestation can alter the atmospheric circulation patterns and related rainfall at synoptic intra-seasonal time scale is the main question of this work.
Poster
Full-text available
The Southern Amazon forest (south of 8°S) has shown changes in the spatial and temporal patterns of its hydroclimatic components due to a complex interaction between climate and deforestation, which could probably lead to a biophysical transition. Previous research on these interactions either has a large-scale or global focus, or is based on limit...
Article
Full-text available
As the largest river basin on Earth, the Amazon is of major importance to the world's climate and water resources. Over the past decades, advances in satellite-based remote sensing (RS) have brought our understanding of its terrestrial water cycle and the associated hydrological processes to a new era. Here, we review major studies and the various...
Article
We analyze the characteristics of atmospheric variations over tropical South America using the pattern recognition framework of weather typing or atmospheric circulation patterns (CPs). During 1979-2020, nine CPs are defined in the region, using a k-means algorithm based on daily unfiltered 850 hPa winds over 0035°N-30°S, 90°W-30°W. CPs are primari...
Article
Full-text available
In the last four decades, the Southern Amazon (south of 8°S) has shown changes in the spatial and temporal patterns of its hydroclimatic components, leading to drier conditions. Due to climate and land-use changes, this region is considered as a zone under biophysical transition processes. Previous studies have documented a complex interaction betw...
Preprint
Full-text available
As the largest river basin on Earth, the Amazon is of major importance to the world's climate and water resources. Over the past decades, advances in satellite-based remote sensing (RS) have brought our understanding of its terrestrial water cycle and the associated hydrological processes to a new era. Here, we review major studies and the various...
Article
Full-text available
The southern Amazonia is undergoing a major biophysical transition, involving changes in land use and regional climate. This study provides new insights on the relationship between hydroclimatic variables and vegetation conditions in the upper Madeira Basin (~1 × 10 ⁶ km ² ). Vegetative dynamics are characterised using the normalized difference veg...
Article
Estimating discharges is a major challenge in water resources management, and techniques such as Data Assimilation (DA) can be used to improve these estimates. This study assesses the application of the local ensemble Kalman filter (LEnKF) DA scheme within a large scale hydrological-hydrodynamic model to improve discharge estimates. Different scena...
Article
River floodplains and reservoirs interact throughout a basin drainage network, defining a coupled human-water system with multiple feedbacks. Recent modeling developments have aimed to improve the representation of such processes at regional to continental scales. However, most large-scale hydrological models adopt simplified lumped reservoir schem...
Presentation
Global estimates of river dynamics are necessary to manage water resources, mainly in developing countries where in-situ observation is limited. Remote sensors such as nadir altimeters can complement ground data. However current altimeters miss a large number of continental surface water bodies, what is expected to be surpassed by the future Surfac...
Article
Global estimates of river dynamics are needed in order to manage water resources, mainly in developing countries where in-situ observation is limited. Remote sensors such as nadir altimeters can complement ground data. Current altimeters miss however a large number of continental surface water bodies. This issue will be largely resolved by the futu...
Article
We analyze the observed relationship between sea surface temperatures (SSTs) over the Atlantic Ocean and Normalized Difference Vegetation Index (NDVI) in the Orinoco and Amazon basins. Monthly correlations between anomalies of NDVI and SSTs are computed for different regions of the Atlantic Ocean. We also use a mixture of observations and reanalysi...
Data
Animated GIF of return period of daily discharges in South American rivers during the 1983 year.
Presentation
Full-text available
Large evidences support the strong impacts on rainfall amount and the increasing of dry-season length on the Amazonian forest. All of these effects are usually attributed to large scale atmospheric circulation and to land cover changes as part of anthropogenic effects. In this research we assess statistical and modeling approaches to investigate th...
Article
This study provides a spatio-temporal analysis of the great floods that occurred in South America in 1983 using hydrometeorological data and outputs from a continental-scale hydrological-hydrodynamic model. In the extreme year 1983, there were three main flooding periods (February, June and July) in many South American river basins, such as the Ara...
Conference Paper
Full-text available
RESUMO-Modelos hidrológicos regionais têm sido desenvolvidos recentemente de modo a representar, de forma acoplada, processos hidrodinâmicos em rios e planícies de inundação, bem como o efeito de reservatórios. Apresenta-se a aplicação do modelo MGB para a bacia do Alto Paraná (~947.000 km²), considerando propagação hidrodinâmica nas planícies de i...
Article
Study region: Upper Madeira Basin (975,500 km 2) in Southern Amazonia, which is suffering a biophysical transition, involving deforestation and changes in rainfall regime. Study focus: The evolution of the runoff coefficient (Rc: runoff/rainfall) is examined as an indicator of the environmental changes (1982-2017). New hydrological insights for the...
Article
Full-text available
Study region: Upper Madeira Basin (975,500 km2) in Southern Amazonia, which is suffering a biophysical transition, involving deforestation and changes in rainfall regime. Study focus: The evolution of the runoff coefficient (Rc: runoff/rainfall) is examined as an indicator of the environmental changes (1982–2017). New hydrological insights for the...
Poster
Full-text available
The identification and estimation of extreme precipitation events is a fundamental step in many hydrologic applications, as for the design of hydraulic structures. For the estimation of Probable-Maximum-Precipitation (PMP) and Probable-Maximum-Flood (PMF) two main methods are typically adopted: the statistical method and the hydrometeorological one...
Poster
Full-text available
Estimates of hydrological variables (discharge Q, water surface elevation WSE and flooded water extent FWE) over both space and time are still lacking over most world basins despite their great value for water management. Therefore, Data assimilation (DA) of different present and future remote sensing sources can be an alternative to improve hydrol...
Article
In this paper, we present a methodology to map inland water in tropical areas under dense vegetation at high spatial and temporal resolution using multi-source remote sensing data. A new inundation product (SWAF-HR) is presented. It is characterized by a high spatial resolution (30′, 1 km) and high temporal resolution (3 days). The SWAF-HR product...
Conference Paper
Full-text available
The availability of adequate and accurate long term hydroclimatic records has been a challenge for water management around the world, especially in developing countries where such information is limited. In recent years, global reanalysis datasets have been developed to provide these records in hydrologic fields. However, many efforts have been lim...
Article
Adequate and accurate hydrological data is necessary to manage water resources, which are critical in developing countries where such information is limited. In recent years, global reanalysis datasets have been developed to provide this information in climatic fields and, more recently, in hydrologic fields. Nevertheless, these latest efforts have...
Conference Paper
Full-text available
Estimates of hydrological variables such as discharge (Q), water surface elevation (WSE) and surface water extent (A) over both space and time are still lacking over most world basins despite their great value for water management. Despite several attempts using hydrologic and hydrodynamic models have been carried out to produce such estimates, the...
Conference Paper
Full-text available
The technological advance has allowed the cheapening of devices capable of capturing the hydrological impacts generated by disasters, emphasizing here specifically the Unmanned Aerial Vehicles (UAVs) and photographic cameras embarked. In addition, the near-immediate sharing of disasters filmed by UAVs from YouTube posts allows hydrologists to have...
Conference Paper
Full-text available
Over the decades, maximum extreme hydrological events have reached Brazilian municipalities causing tangible and intangible damage. To understand these events, the hydrological and hydrodynamic reconstruction aims to represent the past event in order to study the importance of the forcing agents involved and their interactions, as well as the catch...
Conference Paper
Full-text available
Over the decades, maximum extreme hydrological events have reached Brazilian municipalities causing tangible and intangible damage. To understand these events, the hydrological and hydrodynamic reconstruction aims to represent the past event in order to study the importance of the forcing agents involved and their interactions, as well as the catch...
Article
Full-text available
Projections of climate change are essential to guide sustainable development plans in the tropical Andean countries such as Peru. This study assessed the projections of precipitation and potential evaporation, rain erosive potential, and precipitation concentration in the Mantaro River Basin, in the Peruvian Andes, which is important for agricultur...
Conference Paper
Full-text available
Resumo-A América do Sul é responsável por 30% da vazão afluente aos oceanos, apresenta ampla diversidade hidrológica, importantes ecossistemas e seus recursos hídricos são compartilhados por diversos países, e diferentes setores econômicos, mas que também sofrem com impactos de cheias e secas. Avanços em modelos de simulação e sensoriamento remoto...
Conference Paper
Full-text available
Precipitation is one of the hydrological variables that has high difficulty level to estimate and has a great importance to many applications. Trying to solve this limitation, many products have been produced to estimate rainfall over quasi global coverage and usually used in places without data. The most recent of them is provided by Multi-Source...
Conference Paper
Full-text available
Recent studies have reported an increase in intensity and frequency of hydrological extreme events in many regions of the Amazon basin over last decades, these events such as seasonal floods and droughts have originated a significant impact in human and natural systems. Recently, methodologies such as climatic reanalysis are being developed in orde...
Article
Recently developed methodologies such as climate reanalysis make it possible to create a historical record of climate systems. This paper proposes a methodology called Hydrological Retrospective (HR), which essentially simulates large rainfall datasets, using this as input into hydrological models to develop a record of past hydrology, making it po...
Article
Soil degradation by water erosion has been accelerated by human activities. This process is aggravated in the Andes region due to steep slopes, sparse vegetation cover, and sporadic but high intensity rainfall, which together with a shallow soil depth, increases soil erosion risk. The objective of this study was to analyze the soil erosion risk, as...

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Projects

Projects (3)
Project
The main goal of this research is to assess potential impacts of climate change on water availability, precipitation indexes and soil erosion risk in the Peruvian Andes.
Project
The main goal of the Hydrological Reanalysis methodology is to reconstruct spatio-temporal hydrological state variables in the Amazon basin over multi decadal scale, in both 20th century and satellite era, to study hydrological extreme events.
Project
The project entitled "Development of Hydrological Models", coordinated by professor Walter Collischonn, aims to develop and improve mathematical models to simulate real systems such as river basins, reservoirs and rivers. In the context of large river basins, the model used is the MGB (Large-Scale Hydrologic Model), which has been improved since its creation in 2001. Currently, the MGB model is able to represent rivers with large floodplains and complex drainage networks, through the use of the Inertial flow propagation method and a method to represent bifurcations. The model currently also has a GIS interface (Mapwindow) and software for basin delineation (HydroTools). More details about the model: https://www.ufrgs.br/lsh/