Article
Environmental Studies
Devika Nair, Ken G. Evans, Sean M. Bellairs
Summary: This study aimed to analyze the impact of rainfall events on the upper catchment and their effect on downstream geomorphology using the HEC-HMS model. The research showed that the landform gradually attains stability over time, as indicated by the decreasing sediment spikes following rainfall-runoff events. The study also predicted the sediment yield based on simulated rainfall trends over a projected 50-year period.
Article
Geography, Physical
Darrel A. Swift, Guy D. Tallentire, Daniel Farinotti, Simon J. Cook, William J. Higson, Robert G. Bryant
Summary: The study conducted at Findelengletscher in Switzerland shows that the hydraulic efficiency of drainage pathways in the glacier terminus region is poor, but sediment availability is high. The rate of increase in sediment concentration with discharge was found to be significantly lower than expected, indicating a dominance of distributed flow and high sediment connectivity between the glacier and proglacial realm. This results in an unusually high daily sediment yield compared to similar Alpine glaciers.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Geography, Physical
Rebekah M. Harries, Felipe Aron, Linda A. Kirstein
Summary: In the south Central Andes, the relationship between climate, tectonics, erosion, and topography has been studied and the contribution of fault motion to topography has been observed. Rivers on the wetter Chilean side have steep and narrow valleys, while those on the arid Argentinian side have wider and less steep valleys. This difference is hypothesized to be due to the aridity of the Argentinian region, limiting vertical incision and favoring lateral incision and valley widening.
Review
Environmental Sciences
Masashi Kiguchi, Kumiko Takata, Naota Hanasaki, Boonlert Archevarahuprok, Adisorn Champathong, Eiji Ikoma, Chaiporn Jaikaeo, Sudsaisin Kaewrueng, Shinjiro Kanae, So Kazama, Koichiro Kuraji, Kyoko Matsumoto, Shinichiro Nakamura, Dzung Nguyen-Le, Keigo Noda, Napaporn Piamsa-Nga, Mongkol Raksapatcharawong, Prem Rangsiwanichpong, Sompratana Ritphring, Hiroaki Shirakawa, Chatuphorn Somphong, Mallika Srisutham, Desell Suanburi, Weerakaset Suanpaga, Taichi Tebakari, Yongyut Trisurat, Keiko Udo, Sanit Wongsa, Tomohito Yamada, Koshi Yoshida, Thanya Kiatiwat, Taikan Oki
Summary: This comprehensive review explores the impacts of climate change on the water sector in Thailand, identifying gaps in research and suggesting ten research recommendations. While providing state-of-the-art knowledge on the subject, it also highlights the need for systematic assessments and broader coverage for a clearer understanding of future climate change impacts.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
I. Vergara, R. Garreaud, D. Araneo, F. Leyton
Summary: Understanding the environmental factors that determine erosion is crucial for understanding the Earth's evolution and managing natural resources. This study found that extreme runoff, glacier cover, and channel steepness are the main factors influencing sediment export in the western side of the Andes.
Article
Geosciences, Multidisciplinary
P. I. A. Kinnell
Summary: The laboratory experiments discovered that raindrops induce different modes of motion in particles of different sizes, and that the particle distribution of rain-impacted sediment discharge changes over time. The experiments also found that sediment discharge induced by raindrops peaks at a specific flow depth. The assumption that rain erosion is solely determined by flow discharge and rainfall intensity is proven to be false.
Article
Geography, Physical
Miluska A. Rosas, Francois Clapuyt, Willem Viveen, Veerle Vanacker
Summary: The western Peruvian region is prone to erosion and geomorphic change. Monitoring these changes using an Uncrewed Aerial Vehicle - Post-Processing Kinematic - Structure from Motion (UAV-PPK-SfM) approach can provide valuable insights into geomorphic dynamics and land cover changes. This study revealed significant geomorphic activity in an ungauged Andean river basin, highlighting the importance of monitoring and understanding these processes.
Article
Engineering, Civil
D. Mahoney, B. Blandford, J. Fox
Summary: Coupling erosion formulae with sediment connectivity methods is a promising approach to represent the variability of sediment processes. Results showed unforeseen interdependencies between connectivity formulae and RUSLE, highlighting the need for feedback calibration schemes to resolve model independence issues. The study advanced prediction of sediment processes by simulating the impact of legacy terracing on connectivity and soil loss.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Raul R. Cordero, Edgardo Sepulveda, Sarah Feron, Chenghao Wang, Alessandro Damiani, Francisco Fernandoy, Steven Neshyba, Penny M. Rowe, Valentina Asencio, Jorge Carrasco, Juan A. Alfonso, Shelley MacDonell, Gunther Seckmeyer, Juan M. Carrera, Jose Jorquera, Pedro Llanillo, Jacob Dana, Alia L. Khan, Gino Casassa
Summary: The Andean snowpack is a crucial water source for communities but is sensitive to black carbon (BC) deposition, which accelerates melting. Measurements show BC concentrations ranging from 2 to 15 ng g(-1), with heavily impacted areas experiencing seasonal snowpack shrinking up to 241 mm water equivalent.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Physics, Multidisciplinary
Pedro Henrique Lima Alencar, Eva Nora Paton, Jose Carlos de Araujo
Summary: The study introduces a new method for assessing sub-daily precipitation features using the principle of maximum entropy, showing significant improvements in hydrological modeling, particularly in arid and semiarid regions. The results demonstrate the effectiveness of the method compared to conventional deterministic modeling, with a Nash-Sutcliffe efficiency of 0.96 and absolute error of 21%.
Article
Geochemistry & Geophysics
Timothy A. Goudge, Caleb I. Fassett, Marianne Coholich, Emily R. Bamber
Summary: More than 250 hydrologically open paleolakes on Mars have been discovered, which were filled with water before catastrophic breaching occurred. Observational results and numerical modeling experiments indicate that steeper slopes and taller crater rims are key factors in promoting more complete draining of these open-basin lakes on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geosciences, Multidisciplinary
Miluska A. Rosas, Willem Viveen, Veerle Vanacker
Summary: The erosion processes in the tropical Andes have been less studied compared to other major mountain ranges. This study focuses on the spatial patterns of sediment yield along the western slopes of the Peruvian Andes and identifies the importance of environmental factors such as climate, topography, and land cover in controlling sediment production and transport.
Article
Environmental Sciences
Se Jong Cho, Christian A. Braudrick, Christine L. Dolph, Stephanie S. Day, Brent J. Dalzell, Peter R. Wilcock
Summary: The study developed a methodological framework for estimating watershed-scale near-channel sediment loading using stream gaging data, providing a predictive basis for evaluating the impacts of runoff and river discharge increases on near-channel sediment supply. Application of this method includes evaluating conservation trade-offs, measuring benefits of landscape management practices in terms of reduction in downstream near-channel sediment loading in incised river corridors.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Geosciences, Multidisciplinary
Shanshan Deng, Junqiang Xia, Xin Liu, Meirong Zhou, Yu Mao, Quanxi Xu
Summary: After the operation of the Three Gorges Project, the sediment transport in the Middle Yangtze River has shifted from upstream input to fluvial erosion and tributary input. Fine sediment mainly comes from upstream and tributaries, while coarse sediment primarily comes from bed and bank erosion. The river system has transformed from transport-limited to supply-limited, with future sediment supply rate decreasing due to river regulation works.
Article
Environmental Sciences
Remi Valois, Jaime Araya Vargas, Shelley MacDonell, Camilo Guzman Pinones, Francisco Fernandoy, Gonzalo Yanez Carrizo, Jaime G. Cuevas, Eric A. Sproles, Antonio Maldonado
Summary: The study characterized the thickness of alluvial filling of a peat-accumulating wetland in North-Central Chile using Electrical Resistivity Tomography (ERT), highlighting a conductive basin shape of the peatland. Results also showed water exchanges between the wetland and streamflow, with a streamflow loss towards the peatland groundwater reservoir at the end of the spring season. The research proposed a peatland conceptual model to connect groundwater, rock glaciers, snowmelt, and hillslope flows.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Jean-Sebastien Moquet, Jean-Loup Guyot, Sergio Morera, Alain Crave, Pedro Rau, Philippe Vauchel, Christelle Lagane, Francis Sondag, Casimiro Waldo Lavado, Rodrigo Pombosa, Jean-Michel Martinez
COMPTES RENDUS GEOSCIENCE
(2018)
Article
Environmental Sciences
Irma Ayes Rivera, Elisa Armijos Cardenas, Raul Espinoza-Villar, Jhan Carlo Espinoza, Jorge Molina-Carpio, Jose Max Ayala, Omar Gutierrez-Cori, Jean-Michel Martinez, Naziano Filizola
Article
Geochemistry & Geophysics
Tristan C. C. Rousseau, Martin Roddaz, Jean-Sebastien Moquet, Helga Handt Delgado, Gerome Calves, Germain Bayon
Article
Environmental Sciences
Irma Ayes Rivera, Ana Claudia Callau Poduje, Jorge Molina-Carpio, Jose Max Ayala, Elisa Armijos Cardenas, Raul Espinoza-Villar, Jhan Carlo Espinoza, Omar Gutierrez-Cori, Naziano Filizola
Article
Geochemistry & Geophysics
Abrahan Mora, Cristina Moreau, Jean-Sebastien Moquet, Marjorie Gallay, Jurgen Mahlknecht, Alain Laraque
APPLIED GEOCHEMISTRY
(2020)
Article
Geochemistry & Geophysics
Pierre Maffre, Yves Godderis, Nathalie Vigier, Jean-Sebastien Moquet, Sebastien Carretier
Article
Geography, Physical
Jean-Sebastien Moquet, Sergio Morera, Bruno Turcq, Franck Poitrasson, Martin Roddaz, Patricia Moreira-Turcq, Jhan Carlo Espinoza, Jean-Loup Guyot, Ken Takahashi, Jhon Orrillo-Vigo, Susana Petrick, Stephanie Mounic, Francis Sondag
GLOBAL AND PLANETARY CHANGE
(2020)
Article
Geochemistry & Geophysics
E. Muller, E. C. Gaucher, C. Durlet, J. S. Moquet, M. Moreira, V Rouchon, P. Louvat, G. Bardoux, S. Noirez, C. Bougeault, E. Vennin, E. Gerard, M. Chavez, A. Virgone, M. Ader
GEOCHIMICA ET COSMOCHIMICA ACTA
(2020)
Article
Water Resources
Manuel Figueroa, Elisa Armijos, Jhan Carlo Espinoza, Josyane Ronchail, Pascal Fraizy
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2020)
Article
Environmental Sciences
Julien Jouanno, Jean-Sebastien Moquet, Leo Berline, Marie-Helene Radenac, William Santini, Thomas Changeux, Thierry Thibaut, Witold Podlejski, Frederic Menard, Jean-Michel Martinez, Olivier Aumont, Julio Sheinbaum, Naziano Filizola, Guy Dieudonne Moukandi N'Kaya
Summary: In recent years, there has been a massive proliferation of Sargassum in the Tropical Atlantic, but there is no clear evidence to suggest a significant increase in nutrient fluxes from rivers or that hydrological changes are the primary drivers of Sargassum proliferation. Observations also indicate a decrease in phytoplankton biomass in major Atlantic river plumes over the past two decades, highlighting the need for a better understanding of the nutrient sources sustaining Sargassum and phytoplankton growth in the region.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Valdir Felipe Novello, Francisco William da Cruz, Mathias Vuille, Jose Leandro Pereira Silveira Campos, Nicolas Misailidis Strikis, James Apaestegui, Jean Sebastien Moquet, Vitor Azevedo, Angela Ampuero, Giselle Utida, Xianfeng Wang, Gustavo Macedo Paula-Santos, Plinio Jaqueto, Luiz Carlos Ruiz Pessenda, Daniel O. Breecker, Ivo Karmann
Summary: This study focuses on investigating the influence of local hydroclimate, altitude, temperature, and vegetation types on the delta C-13 values in stalagmites. The results show that the main factors influencing delta C-13 values are associated with the local hydroclimate, and there is a significant correlation between delta C-13 and delta O-18 values in most records.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Engineering, Civil
Elisa Armijos, Gustavo H. Merten, Joel T. Groten, Christopher A. Ellison, Luke U. Lisiecki
Summary: Although formulas are preferred over field data collection and analysis for bedload transport due to cost and time constraints, the performance of these formulas is dependent on the hydraulic and sedimentological conditions of the site. In this study, nine bedload transport formulas were evaluated using field measurements from the Lower Minnesota River and two tributaries, resulting in the derivation of provisional equations based on power functions for estimating bedload discharge. However, the formulas calculated higher bedload rates compared to the measured values due to site-specific physical characteristics and sampling uncertainties.
JOURNAL OF HYDROLOGIC ENGINEERING
(2021)
Article
Water Resources
Irma Ayes Rivera, Jorge Molina-Carpio, Jhan Carlo Espinoza, Omar Gutierrez-Cori, Wilmar L. Ceron, Frederic Frappart, Elisa Armijos Cardenas, Raul Espinoza-Villar, Jose Max Ayala, Naziano Filizola
Summary: The decrease in suspended sediment concentration (SSSC) in the Madeira River in December is related to reduced rainfall in the Madre de Dios sub-basin, while the negative trend in SSSC in January and February is associated with changes in rainfall patterns in the Andean region after 2008 and dilution caused by base flow. These findings highlight the importance of considering upstream processes in the Andean part of the basin when evaluating sediment trends in the Madeira River.
FRONTIERS IN WATER
(2021)
Article
Water Resources
Jean-Sebastien Moquet, Julien Bouchez, Jean-Jacques Braun, Sakaros Bogning, Auguste Paulin Mbonda, Sebastien Carretier, Vincent Regard, Jean-Pierre Bricquet, Marie-Claire Paiz, Emmanuel Mambela, Jerome Gaillardet
Summary: Despite the absence of tectonic activity, cratonic environments exhibit highly variable rock weathering rates. This study in Gabon's Ogooue and Mbei River basins reveals significant differences in weathering intensities among different regions, suggesting that the heterogeneity of weathering rates in cratonic regions should be considered for understanding the global carbon cycle and Earth's climate.
FRONTIERS IN WATER
(2021)
Article
Environmental Sciences
E. Armijos, A. Crave, J. C. Espinoza, N. Filizola, R. Espinoza-Villar, I Ayes, P. Fonseca, P. Fraizy, O. Gutierrez, P. Vauchel, B. Camenen, J. M. Martiinez, A. Dos Santos, W. Santini, G. Cochonneau, J. L. Guyot
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2020)
Article
Geosciences, Multidisciplinary
David Dominguez-Santos, Daniel Valderrama, Ahmet Utku Yazgan
Summary: This document presents a study comparing the spectra of large-magnitude seismic records in Chile between 2012 and 2022 with the design spectra of NCh433 and D. S 61. The aim is to determine if Chile's seismic-resistant regulations are updated to the existing reality and propose new design spectra that better represent the seismic activity in Chile during the last decade.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Prabhu Palanisamy, Vivek Sivakumar, Priya Velusamy, Logesh Natarajan
Summary: Shoreline changes in the southern coast of Rio de Janeiro, Brazil, were analyzed from 1986 to 2018. The study found that both natural and human factors significantly impact shoreline changes. The findings provided important insights into predicting future shoreline positions and identifying vulnerable regions. Additionally, human activities were found to influence shoreline change models, emphasizing the need for effective management strategies to protect ecosystems and communities.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Irina Salgado Bernal, Periyasamy Sivalingam, Armando Martinez Sardina, Michel Manduca Artiles, Maria E. Carballo Valdes, John Pote
Summary: This study investigated the presence of 15 toxic metals in surface sediment in a tropical river ecosystem in Cuba. The results showed that the sediments had higher concentrations of four metals compared to Cuban norms. Various contamination indices were calculated, and correlations analysis revealed the main sources of contamination. The study provides important information for the management of the river and emphasizes the need for metal pollution control and monitoring.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Camila Morgan, Eduardo Morgado, Miguel-Angel Parada, Raimundo Brahm, Francisca Mallea-Lillo
Summary: Lanin volcano is a composite volcano in the Andes, which has erupted lava flows with different compositions. The volcano's magma reservoir contains a crystal mush, and the pre-eruptive conditions include temperature, pressure, and oxygen fugacity. Fractional crystallisation has led to the evolution of the magma with different compositions.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Benjamin Idini, Sergio Ruiz, Jean-Paul Ampuero, Felipe Leyton, Efrain Rivera
Summary: This study investigates the role of wedge integrity on the frequency content of strong ground motion produced by subduction earthquakes in Northern Chile. The results show that the frequency characteristics of seismic waves vary with hypocentral distance, indicating lateral variations in anelastic attenuation due to the heterogeneous tectonic structure.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
