Article
Environmental Sciences
Thomas Grangeon, Rosalie Vandromme, Olivier Cerdan, Maria De Girolamo Anna, Antonio Lo Porto
Summary: Forests provide ecological and hydrological services, but forest fires can have negative impacts, requiring appropriate mitigation strategies. A study used a model to analyze the effects of forest fires and firebreaks on sediment loads. More research is needed to understand the global impacts of forest growth, fires, and firebreaks on sediment transfers in similar environments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Hannah Gies, Maarten Lupker, Silvan Wick, Negar Haghipour, Bjoern Buggle, Timothy Eglinton
Summary: This study investigates the impact of runoff-driven erosion on the contribution of different carbon source endmembers. By using an inverse model and carbon isotope signatures, the study reveals that soil-sourced organic carbon increases with runoff in alpine headwater streams.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Environmental Sciences
Ryan M. Ferrell, Scott Devine, Anthony T. T. O'Geen
Summary: The deep root system of forests allows them to withstand insufficient precipitation. However, there is limited documentation regarding the spatial distribution of regolith thickness in forest ecosystems. A study in the southern Sierra Nevada estimated regolith thickness using hand auger measurements across a 543-ha watershed and found that more than 55% of the area had a depth greater than 5 m. The study also revealed a correlation between topography and spatial trends in regolith thickness.
VADOSE ZONE JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Susanta Das, Proloy Deb, Pradip Kumar Bora, Prafull Katre
Summary: The study focuses on estimating soil erosion in a hilly watershed, using modeling approaches to prioritize critical erosion hazard areas for management plans. Two models were used to estimate soil loss, with similar results showing the study area under severe erosion class. The findings and methodology can be applied in mountainous watersheds globally for identifying best management practices.
Article
Environmental Sciences
Takuhei Yamasaki, Shoichiro Hamamoto, Taku Nishimura
Summary: In this study, the GeoWEPP model was used to predict sediment discharge from a granitic-forested catchment in Japan by separating quick flow from the total hydrograph. The proposed procedure accurately reproduced the quick-flow runoff and cumulative sediment discharge from the catchment. It also overestimated water runoff during extreme weather events.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
Article
Environmental Studies
Lia Duarte, Mario Cunha, Ana Claudia Teodoro
Summary: Soil erosion is a severe issue in agriculture, and this study assessed soil loss in two regions using different methodologies and factors of the RUSLE equation. Eight erosion models were applied in Portugal, indicating that M5 and M6 methods may be more conservative.
Article
Ecology
Qiqi Wang, Yuquan Qu, Kerri-Leigh Robinson, Heye Bogena, Alexander Graf, Harry Vereecken, Albert Tietema, Roland Bol
Summary: Deforestation has significant impacts on hydrological and geochemical processes, especially on the dynamics of dissolved organic carbon (DOC). This study reveals that anthropogenic disturbance (deforestation) under declining atmospheric sulfur input scenario affects the spatiotemporal dynamics and relationships of river DOC and sulfate with hydro-climatological variables. The findings highlight the strong influence of deforestation levels on the coupling of sulfur and carbon cycling in forest catchments.
FRONTIERS IN FORESTS AND GLOBAL CHANGE
(2022)
Article
Engineering, Civil
Sheng Ye, Lin Liu, Jiyu Li, Hailong Pan, Wei Li, Qihua Ran
Summary: Soil moisture plays a crucial role in various processes such as runoff generation, chemical transport, vegetation growth, and geological hazards. However, its dynamics and influence on the rainfall-runoff process are still not fully understood due to measurement difficulties and spatial/temporal variability. In this study, measurements and analysis of precipitation, runoff, and soil moisture were conducted in a small post-seismic mountainous catchment. The results suggest that soil moisture dynamics can be explained by soil characteristics, and the relationship between rainfall and runoff is influenced by the specific soil layers and their properties.
JOURNAL OF HYDROLOGY
(2023)
Article
Soil Science
Yanjia Jiang, Yaling Zhang, Bihang Fan, Jiahao Wen, Hu Liu, Carlos R. Mello, Junfang Cui, Chuan Yuan, Li Guo
Summary: The dynamics and controls of soil moisture spatial organization are crucial to modeling water flux and land-atmosphere interactions. This study examined the influence of subsurface preferential flow on the temporal stability of soil moisture spatial organization (TSSS). Results showed that soil moisture monitoring frequency, soil-terrain attributes, and preferential flow all played a significant role in determining TSSS. The findings highlight the importance of high-frequency monitoring and the role of preferential flow in regulating TSSS.
Article
Soil Science
Nora Keller, Roland Bol, Michael Herre, Bernd Marschner, Stefanie Heinze
Summary: Topography features in catchments have significant impacts on soil properties, nutrient status, microbial dynamics, and enzyme activities. This study examined the activity of four extracellular soil enzymes in a mountainous coniferous forest catchment, and found that enzyme activities varied spatially depending on catchment units, soil parameters, and landscape topography.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Sushil N. Mhaske, Khanindra Pathak, Sonam Sandeep Dash, Dibyendu Bikas Nayak
Summary: The Saranda forest region in India is facing rapid socioeconomic development and soil erosion issues, necessitating soil erosion control planning. The study estimated the annual soil erosion in the area and identified erosion severity and favorable zones for sediment deposition using GIS integrated models.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Soil Science
Jie Tang, Gang Liu, Yun Xie, Xingwu Dun, Daan Wang, Shuai Zhang
Summary: Ephemeral gullies are important erosion features that lead to significant soil loss and sediment production, mainly influenced by rainfall, slope, tillage, and crop management. Cross-slope cultivated areas are more susceptible to severe erosion compared to areas cultivated up and down the slope, with soybean fields experiencing more serious erosion than corn fields.
Article
Geosciences, Multidisciplinary
Thomas Grangeon, Valeria Ceriani, Olivier Evrard, Aurelie Grison, Rosalie Vandromme, Arthur Gaillot, Olivier Cerdan, Sebastien Salvador-Blanes
Summary: This study quantified water and sediment transfers in a tile drained catchment of central France and found high seasonal variability and two transfer pathways in the soil column during 36 recorded flood events.
Article
Engineering, Civil
Xiong Xiao, Zhengliang Yu, Jiaqi Wang, Yongqiang Zhou, Keshao Liu, Zhu Liu, Huawu Wu, Cicheng Zhang
Summary: The permafrost headwater catchments in the Tibetan Plateau have experienced permafrost degradation, which affects riverine solute composition. This study focused on the Yakou catchment in the Northeastern TP and found that frozen soil seeps (FSS) had higher concentrations of ions and organics on the north-facing slope compared to the south-facing slope. FSS played a role in streamflow generation and determined the spatial pattern of riverine solutes.
JOURNAL OF HYDROLOGY
(2023)
Article
Green & Sustainable Science & Technology
Felicien Majoro, Umaru Garba Wali
Summary: Soil erosion is a global environmental problem that leads to decreased agricultural productivity and water quality degradation. This study examines the perceptions of farmers in the Sebeya catchment in Rwanda regarding soil erosion control measures. The results show that various factors, such as gender, age, land ownership, farmland size, social media access, and credit access, strongly influence farmers' willingness to adopt these measures. The findings highlight the importance of government support and training for farmers, as well as the mobilization of a skilled technical team to implement soil erosion control measures in the Sebeya catchment.
Article
Geosciences, Multidisciplinary
C. Misset, A. Recking, C. Legout, B. Viana-Bandeira, A. Poirel
Summary: The study conducted in 7 Alpine catchments reveals that fine particles can be present in significant quantities in the subsurface layer of river beds even when the surface contains none, impacting suspended load modeling and river management. The stocks highly depend on facies, suggesting strong influence from local hydraulics and river bed characteristics. This highlights the significance of interactions between suspended particles and gravel beds in large alluvial sections typically found in Alpine environments.
Article
Geosciences, Multidisciplinary
C. Misset, A. Recking, C. Legout, M. Bakker, F. Gimbert, T. Geay, S. Zanker
Summary: The transportation of fine sediment is influenced by various factors such as different modes of transport and sediment sources. A study in an Alpine catchment over two years revealed a seasonal control exerted by river bed mobility and snow cover on suspended sediment dynamics. The potential shift of sediment dynamics from river bed to hillslope dominated in the context of global warming was also questioned.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Water Resources
Cedric Legout, Guilhem Freche, Romain Biron, Michel Esteves, Oldrich Navratil, Guillaume Nord, Magdalena Uber, Thomas Grangeon, Nico Hachgenei, Brice Boudevillain, Celine Voiron, Lorenzo Spadini
Summary: The Galabre catchment, part of the French network of critical zone observatories, was instrumented in 2007 to study suspended sediments dynamics in areas with highly erodible badlands on different lithologies. The site includes meteorological stations, gauging stations, and automatic water sampling systems to quantify sediment fluxes and analyze the links between meteorological forcing and watershed hydrosedimentary response. The measurements were extended to the dissolved phase in 2017 to understand water origin during events and the partitioning between particulate and dissolved fluxes of solutes in the critical zone.
HYDROLOGICAL PROCESSES
(2021)
Article
Environmental Sciences
B. Camenen, N. Gratiot, J-A Cohard, F. Gard, V. Q. Tran, A-T Nguyen, G. Dramais, T. van Emmerik, J. Nemery
Summary: The hydrological dynamics of the Saigon River is influenced by a variety of factors, with this study proposing a low-cost method for estimating river discharge. Seasonal behaviors were observed in both water level and water discharge, with rainfall having little impact on them. Evidence of interactions between precipitation and coastal waters was found.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
An Truong Nguyen, Thanh-Son Dao, Emilie Strady, Tuyet T. N. Nguyen, Joanne Aime, Nicolas Gratiot, Julien Nemery
Summary: The study analyzed the spatiotemporal variation of phytoplankton and their relationship with environmental variables in the Saigon River in Southern Vietnam. It was found that phytoplankton abundance was significantly higher in the dry season compared to the rainy season, and urban emissions from Ho Chi Minh City caused a clear separation in phytoplankton abundance between the urban area and the rest of the river.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Anna Maria De Girolamo, Olivier Cerdan, Thomas Grangeon, Giovanni Francesco Ricci, Rosalie Vandromme, Antonio Lo Porto
Summary: This paper models the impact of forest fires and post-fire mitigation measures on soil erosion. The study finds that the effects of fire on surface runoff are negligible, but it significantly increases specific sediment yield (SSY).
Article
Geosciences, Multidisciplinary
Hanna Haddad, Magali Jodeau, Cedric Legout, Germain Antoine, Ian G. Droppo
Summary: High suspended sediment load in mountainous environments can lead to the deposition of fine sediments in gravel bed rivers, which affects the morphodynamics and stability of the rivers. The erosion properties of these fine sediment deposits are not fully understood, so field monitoring campaigns were conducted to investigate their dynamics and controlling factors. The results show spatial variability and inter-related variables, such as deposit location, elevation from the river surface, and moisture, that affect the erodibility of the fine sediment deposits.
Article
Environmental Sciences
Olivier Evrard, Pedro V. G. Batista, Jaume Company, Aymeric Dabrin, Anthony Foucher, Amaury Frankl, Julian Garcia-Comendador, Arnaud Huguet, Niels Lake, Ivan Lizaga, Nuria Martinez-Carreras, Oldrich Navratil, Cecile Pignol, Virginie Sellier
Summary: This study aims to improve sediment fingerprinting methods by suggesting better utilization of geomorphological information, incorporating local knowledge, implementing state-of-the-art tracing protocols, promoting best modeling practices, sharing data and samples, and refining hypothesis formulation. These improvements can enhance the role of sediment fingerprinting in addressing current and future challenges associated with global change.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Environmental Sciences
Nico Hachgenei, Guillaume Nord, Lorenzo Spadini, Henri Mora, Francois Courvoisier, Jean-Francois Sutra, Jean-Pierre Vandervaere, Cedric Legout, Marie-Christine Morel, Jean Martins, Anne Lespine, Celine Duwig
Summary: Many contaminants of agricultural origin are released into rural environments, particularly at the soil surface. However, there is limited knowledge about their fate and transfer within and between environmental compartments. Therefore, a device and protocol for sampling intact soil monoliths without heavy machinery has been proposed to investigate the transfer of trace organic contaminants through topsoils.
VADOSE ZONE JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Thomas Grangeon, Rosalie Vandromme, Lai Ting Pak, Philippe Martin, Olivier Cerdan, Jean-Baptiste Richet, Olivier Evrard, Veronique Souchere, Anne-Veronique Auzet, Bruno Ludwig, Jean-Francois Ouvry
Summary: Developing distributed runoff and soil erosion models is crucial for managing cultivated areas. However, parameterization of such models in agricultural catchments is challenging due to the variability of soil properties. This study addresses this issue by proposing a software that combines land use management and soil surface state analysis. The software was evaluated using a 9-year dataset in an agricultural catchment and showed promising results. It can be used in other ungauged catchments for exploring the impact on agricultural catchment hydrological dynamics.
Article
Engineering, Civil
Maarten Bakker, Cedric Legout, Florent Gimbert, Guillaume Nord, Brice Boudevillain, Guilhem Freche
Summary: Rainfall is a key driver of geomorphological processes and has an impact on seismic records. Through analyzing the relationship between rainfall dynamics and seismic power spectral density, it is found that seismic power has a power-law scaling with rainfall intensity and kinetic energy. Large raindrops contribute the most to seismic signals and are sensitive to the disaggregation and mobilization of soil particles. These findings provide a foundation for studying geological and hydro-geomorphological processes.
JOURNAL OF HYDROLOGY
(2022)
Article
Geography, Physical
Mathieu Cassel, Oldrich Navratil, Frederic Liebault, Alain Recking, Daniel Vazquez-Tarrio, Maarten Bakker, Sebastien Zanker, Clement Misset, Herve Piegay
Summary: This study combined RFID technology and geophone monitoring stations to link the virtual velocity of tracers with seismic activity, hydraulic forcing, and particle properties. The results showed that seismic activity best explained the observed variance of the virtual velocity of particles (81%), compared to discharge (58%) and stream power (63%). Combining control variables in an empirical model, the model explained 89% of the variance and allowed quantification of the portions explained by hydraulic forcing, geophonic activity, and tracked particles. These results demonstrate the high potential of these combined monitoring techniques for investigating bedload processes in rivers of different morphologies at different spatiotemporal scales.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Environmental Sciences
Thomas Grangeon, Cecile Gracianne, Yvonnick Favreau, Rosalie Vandromme, Gregory Dupeux, Olivier Cerdan, Jeremy Rohmer, Olivier Evrard, Sebastien Salvador-Blanes
Summary: This study collected data on fine sediment deposition and river reach characteristics in three medium-sized temperate catchments, and developed and evaluated a random forest model. The results showed that fine sediment deposition is influenced by nonlinear river reach characteristics, and the six most influential variables are bed substrate granularity, flow condition, reach depth and width, and the proportion of cropland and forest. The findings of this study are important for understanding sediment connectivity in catchments, designing future measurement campaigns, and implementing mitigation strategies.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Environmental Sciences
Hanna Haddad, Cedric Legout, Magali Jodeau
Summary: This study investigated the spatial variability of erodibility in a 1-km-long river reach of the Galabre River in the southern French Alps. The study found that marginal deposits were more resistant than superficial or water-saturated ones. The sensitivity of the modeled eroded mass to erodibility parameters varied depending on the set of measurements used, and it was recommended to make 15 to 20 measurements in marginal and superficial zones for an adequate capture of erodibility distribution.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Geosciences, Multidisciplinary
Sophie Defontaine, Isabel Jalon-Rojas, Aldo Sottolichio, Nicolas Gratiot, Cedric Legout
Summary: An optical settling column was used to study the settling velocity of suspended matter in the Garonne Tidal River. The study found time and space variability in settling velocity, ranging from 0.018 to 0.268 mm/s. The settling velocity was influenced by resuspension, deposition, advection, and the presence of estuarine turbidity maxima (ETM).