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View article: Hydrological regime shifts in Sahelian watersheds: an investigation with a simple dynamical model driven by annual precipitation
Hydrological regime shifts in Sahelian watersheds: an investigation with a simple dynamical model driven by annual precipitation Open
The Sahel, the semi-arid fringe south of the Sahara, experienced severe meteorological droughts in the '70s–'80s. Since these droughts, watersheds in the Central Sahel have experienced an increase in the annual runoff coefficient (annual r…
View article: An explicit representation of river-floodplains relationships in the integrated hydrological - land surface model CLM-PARFLOW
An explicit representation of river-floodplains relationships in the integrated hydrological - land surface model CLM-PARFLOW Open
Floodplains, a type of wetland regularly flooded by large rivers, are important hydrological objects to document and understand. They are places where the hydrological risk can be highly damageable, and where the high frequency of saturate…
View article: Beyond lineaments: Exploring the influence of weathered layers on borehole productivity in basement rocks of Burkina Faso, West Africa
Beyond lineaments: Exploring the influence of weathered layers on borehole productivity in basement rocks of Burkina Faso, West Africa Open
In borehole siting within the basement rock aquifers of West Africa, lineament analysis has traditionally been the primary hydrogeological target, where lineaments may indicate the presence of deep geological structures. However, the limit…
View article: A drought-triggered hydrological tipping point in the central Sahel: an attribution study using system dynamics modelling
A drought-triggered hydrological tipping point in the central Sahel: an attribution study using system dynamics modelling Open
West Africa experienced severe drought between the 1970s and 1990s. A shift in the hydrological regime was observed in most of the catchments of the central Sahel (the semi-arid fringe south of the Sahara): from the drought onward, runoff …
View article: Eco-hydrology modelling in arid areas : Study of root density impact on water fluxes in the Sahelian region
Eco-hydrology modelling in arid areas : Study of root density impact on water fluxes in the Sahelian region Open
The Sahelian region experienced intense droughts between 1970 and 1990 and despite a precipitation « recovering », soils remain degraded and a decrease in the soil ability to infiltrate - an essential characteristic for vegetatio…
View article: Evaluation of Reanalysis Estimates of Precipitation, Radiation, and Temperature over Benin (West Africa)
Evaluation of Reanalysis Estimates of Precipitation, Radiation, and Temperature over Benin (West Africa) Open
In West Africa, climatic data issues, especially availability and quality, remain a significant constraint to the development and application of distributed hydrological modeling. As alternatives to ground-based observations, reanalysis pr…
View article: Tipping points in hydrology: attribution of regime shifts using historical climate simulations and dynamical system modeling
Tipping points in hydrology: attribution of regime shifts using historical climate simulations and dynamical system modeling Open
The Sahel (the semi-arid fringe south of the Sahara) experienced a severe drought in the 70s-90s. During this drought, an hydrological regime shift was observed for most watersheds in the Central Sahel: runoff has significantly increased d…
View article: Impact of distributed meteorological forcing on simulated snow cover and hydrological fluxes over a mid-elevation alpine micro-scale catchment
Impact of distributed meteorological forcing on simulated snow cover and hydrological fluxes over a mid-elevation alpine micro-scale catchment Open
From the micro- to the mesoscale, water and energy budgets of mountainous catchments are largely driven by topographic features such as terrain orientation, slope, steepness, and elevation, together with associated meteorological forcings …
View article: Comment on hess-2021-639
Comment on hess-2021-639 Open
From the micro to mesoscale, water and energy budgets of mountainous catchments are largely driven by topographic features such as terrain orientation, slope, steepness, elevation together with associated meteorological forcings such as pr…
View article: Tipping points in hydrology: observed regional regime shift and System Dynamics modeling
Tipping points in hydrology: observed regional regime shift and System Dynamics modeling Open
<div> <p>River runoff and climate data existing from 1950 to present time in West Africa are analyzed over a climatic gradient from the Sahel (semi-arid) to the Gulf of Guinea (humid). The region experienced a severe drought in…
View article: Comment on hess-2021-639
Comment on hess-2021-639 Open
Abstract. From the micro to mesoscale, water and energy budgets of mountainous catchments are largely driven by topographic features such as terrain orientation, slope, steepness, elevation together with associated meteorological forcings …
View article: Impact of distributed meteorological forcing on snow dynamic and induced water fluxes over a mid-elevation alpine micro-scale catchment
Impact of distributed meteorological forcing on snow dynamic and induced water fluxes over a mid-elevation alpine micro-scale catchment Open
From the micro to mesoscale, water and energy budgets of mountainous catchments are largely driven by topographic features such as terrain orientation, slope, steepness, elevation together with associated meteorological forcings such as pr…
View article: A parametric sensitivity analysis for prioritizing regolith knowledge needs for modeling water transfers in the West African critical zone
A parametric sensitivity analysis for prioritizing regolith knowledge needs for modeling water transfers in the West African critical zone Open
Hard rock aquifers (HRAs) in West Africa (WA) are located within a thick regolith layer. The representation of thick tropical regolith in integrated hydrological models lacks consensus on aquifer geometries and parameter ranges. Our main o…
View article: Intermittent rivers and ephemeral streams: Perspectives for critical zone science and research on socio‐ecosystems
Intermittent rivers and ephemeral streams: Perspectives for critical zone science and research on socio‐ecosystems Open
Intermittent rivers and ephemeral streams (IRES) are now recognized to support specific freshwater biodiversity and ecosystem services and represent approximately half of the global river network, a fraction that is likely to increase in t…
View article: The sensitivity of a critical zone model to the representation of hydraulic conductivity heterogeneity in a deeply weathered hard rock aquifer in West Africa
The sensitivity of a critical zone model to the representation of hydraulic conductivity heterogeneity in a deeply weathered hard rock aquifer in West Africa Open
<p>Currently 40 % of Africa's population still lacks access to clean water. Twice as many rural people live in hard rock areas as compared to sedimentary areas. In these hard rock areas a thick weathered regolith layer covers the cry…
View article: Large scale high resolution modelling of the West African rivers and aquifers
Large scale high resolution modelling of the West African rivers and aquifers Open
<p>West Africa has been classified as one of the most vulnerable regions in the world for water resources to face global changes, both climatic and demographic. The population is expected to double by 2050 leading to increased pressu…
View article: Groundwater dynamics retrievals in Africa using SMOS soil moisture measurements
Groundwater dynamics retrievals in Africa using SMOS soil moisture measurements Open
<p>ESA&#8217;s SMOS mission is celebrating 10 years of measurements in 2020 and is still producing soil moisture data of interest for many applications. One of the successes of this mission is its unexpected applications of soil …
View article: In Situ and In Transit Computing for Large Scale Geoscientific Simulation
In Situ and In Transit Computing for Large Scale Geoscientific Simulation Open
<p>In situ and in transit computing is an effective way to place postprocessing and preprocessing tasks for large scale simulations on the high performance computing platform. The resulting proximity between the execution of preproce…
View article: Residence time of nitrogen deposit in a nival subalpine catchment using the hyper-resolution ParFlow-CLM-EcoSLIM critical zone model.
Residence time of nitrogen deposit in a nival subalpine catchment using the hyper-resolution ParFlow-CLM-EcoSLIM critical zone model. Open
<p>Mountain regions represent a particular challenge for critical zone modelling as snowpack interacts with soils, vegetation, surface water and atmosphere and plays a primary role on the water transfers but also on the carbon and ni…
View article: A study of the monsoonal hydrology contribution using a 8-yr record (2010–2018) from superconducting gravimeter OSG-060 at Djougou (Benin, West Africa)
A study of the monsoonal hydrology contribution using a 8-yr record (2010–2018) from superconducting gravimeter OSG-060 at Djougou (Benin, West Africa) Open
SUMMARY We analyse a nearly 8-yr record (2010–2018) of the superconducting gravimeter OSG-060 located at Djougou (Benin, West Africa). After tidal analysis removing all solid Earth and ocean loading tidal contributions and correcting for t…
View article: Hydrological functioning of western African inland valleys explored with a critical zone model
Hydrological functioning of western African inland valleys explored with a critical zone model Open
Inland valleys are seasonally waterlogged headwater wetlands, widespread across western Africa. Their role in the hydrological cycle in the humid, hard-rock-dominated Sudanian savanna is not yet well understood. Thus, while in the region r…
View article: Hydrological functioning of West-African inland valleys explored with a critical zone model
Hydrological functioning of West-African inland valleys explored with a critical zone model Open
Inland valleys are seasonally waterlogged headwater wetlands, widespread across West-Africa. Their role in the hydrological cycle in the humid, hard rock-dominated Sudanian area is not yet well understood. Thus, while in the region recurre…
View article: AMMA‐CATCH, a Critical Zone Observatory in West Africa Monitoring a Region in Transition
AMMA‐CATCH, a Critical Zone Observatory in West Africa Monitoring a Region in Transition Open
Core Ideas AMMA‐CATCH is a long‐term critical zone observatory in West Africa. Four sites sample the sharp ecoclimatic gradient characteristic of this region. Combined measurements of meteorology, water, and vegetation dynamics began in 19…
View article: Dynamics of water vapor and energy exchanges above two contrasting Sudanian climate ecosystems in Northern Benin (West Africa)
Dynamics of water vapor and energy exchanges above two contrasting Sudanian climate ecosystems in Northern Benin (West Africa) Open
Natural ecosystems in sub‐Saharan Africa are experiencing intense changes that will probably modify land surface feedbacks and consequently the regional climate. In this study, we have analyzed water vapor ( Q LE ) and sensible heat ( Q H …
View article: Leveling and hybrid gravimetry monitoring applied to geothermal sites of Soultz-sous- Forêts and Rittershoffen, Rhine Graben, France
Leveling and hybrid gravimetry monitoring applied to geothermal sites of Soultz-sous- Forêts and Rittershoffen, Rhine Graben, France Open
International audience
View article: Water storage changes as a marker for base flow generation processes in a tropical humid basement catchment (<scp>B</scp>enin): Insights from hybrid gravimetry
Water storage changes as a marker for base flow generation processes in a tropical humid basement catchment (<span>B</span>enin): Insights from hybrid gravimetry Open
In basement catchments of subhumid West Africa, base flow is the main component of annual streamflow. However, the important heterogeneity of lithology hinders the understanding of base flow generation processes. Since these processes are …