Publications de David Andrew Barry

Buoyancy-tilted Shear Layers and Coherent Structures in Hyperpycnal River Plume Plunging

Ulrich Lemmin, David Andrew Barry, Haoran Shi

Shear layers and corresponding Kelvin Helmholtz-type Coherent Structures (KHCS) can be generated by rivers discharging into laterally-unconfined quiescent open water bodies (e.g., lakes). When the river discharge has a greater density than the receiving wa ...

AMER GEOPHYSICAL UNION2025

Effects of Benthic Burrows on Hyporheic Exchange

David Andrew Barry

Macrobenthic invertebrates are widely distributed on sediments, and the micro‐morphology such as burrows and sand mounds due to their bioturbation activities can cause substantial changes in hyporheic exchange (HE). This study explores the characteristics ...

American Geophysical Union (AGU)2025

Identifying and quantifying unexpected deep zooplankton diel vertical migration in a large deep lake

Ulrich Lemmin, David Andrew Barry, Htet Kyi Wynn, Valentin Kindschi, Rafael Sebastian Reiss, Violaine Florette Piton

Diel Vertical Migration (DVM), a widespread zooplankton behavior in freshwater and marine systems, affects ecological interactions and biogeochemical cycles. In lakes, DVM has mainly been studied in the upper 50 m of the water column. However, based on aco ...

American Society of Limnology and Oceanography2025

Direct impact of climate change on groundwater levels in the Iberian Peninsula

David Andrew Barry

The Iberian Peninsula is a water-scarce region that is increasingly reliant on groundwater. Climate change is expected to exacerbate this situation due to projected irregular precipitation patterns and frequent droughts. Here, we utilised convolutional neu ...

2025

Effects of Seasonal Temperature Fluctuations on Tidally Influenced Coastal Unconfined Aquifers

David Andrew Barry

Land surface and seawater temperatures fluctuate seasonally. However, their impacts on salinity distribution and water exchange in tidally influenced unconfined aquifers remain unclear. This study examines these impacts based on two‐dimensional numerical s ...

Wiley2025

Stochastic optimization to maximize water supply index in conjunctive use of surface and groundwater

David Andrew Barry, Paolo Perona

Systematic operation of water resources systems requires rules that consider the uncertainties affecting system performance. Here, stochastic dynamic programming (SDP) is used to structure and solve a full-scale surface and groundwater conjunctive use mode ...

Elsevier BV2025

Deep-Circulating Groundwater From the Tibetan Plateau Constructed the Loess Plateau

David Andrew Barry

China's Loess Plateau (LP) is a quintessential example of a desert transitional environment characterized by a distinctive soil profile comprising of a red clay layer overlain by loess. The source of the sedimentary materials that formed the plateau, as we ...

AMER GEOPHYSICAL UNION2025

Efficient Implementation of Tidal Forcing in Simulations of Groundwater Dynamics in Subterranean Estuaries

David Andrew Barry

Submarine groundwater discharge from subterranean estuaries is affected by tides, which are represented in computational models as time-dependent boundary conditions on the seaward boundary. Conventionally, a small time step is used in the numerical model ...

AMER GEOPHYSICAL UNION2025

Hydro-sedimentary processes of a plunging hyperpycnal river plume revealed by synchronized remote imagery and gridded current measurements

Ulrich Lemmin, Koen Blanckaert, David Andrew Barry

The present knowledge of plunging hyperpycnal river plumes is mainly based on two-dimensional (confined) laboratory experiments. Several hypotheses on three-dimensional (unconfined) flow processes have been made, but not tested in situ. In this field study ...

American Geophysical Union2024

Field Observations Reveal How Plunging Mixing and Sediment Resuspension Affect the Pathway of a Dense River Inflow Into a Deep Stratified Lake

Ulrich Lemmin, David Andrew Barry

The pathway of dense river inflows into lakes, which affects the lake water quality, is not accurately predicted by existing models. The pathway of a dense riverine inflow in a lake with a submerged canyon is analyzed based on measurements during a 4-month ...

Amer Geophysical Union2024

Seawater Intrusion Inhibits Nitrate Removal in Tidal Marsh Aquifers

David Andrew Barry

Tidal freshwater marshes are threatened by seawater intrusion globally due to freshwater discharge reduction and sea-level rise. However, terrestrial nitrate (NO3−) transport responding to seawater intrusion remains poorly understood in tidal marshes. Afte ...

American Geophysical Union2024

SUPHRE: A Reactive Transport Model With Unsaturated and Density-Dependent Flow

David Andrew Barry

Although unsaturated and density-dependent flow affect solute fate in groundwater, they are rarely both included in reactive transport models. Using the operator-splitting method, a new reactive transport model (SUPHRE) was developed by combining a variabl ...

2024

Tracking the Nearfield Evolution of an Initially Shallow, Neutrally Buoyant Plane Jet Over a Sloping Bottom Boundary

Ulrich Lemmin, David Andrew Barry, Haoran Shi

Understanding coastal plane jets which occur when a body of water discharges into an ocean or a lake through a channel or outlet is important, since they play a significant role in sediment, nutrient, and pollutant exchange. This study investigates the nea ...

Amer Geophysical Union2024

Effects of Hyporheic Exchange and Settlement on the Particle Size Distribution of Colloids

David Andrew Barry, Qihao Jiang

Colloid particle size plays an important role in contaminant adsorption and clogging in the hyporheic zone, but it remains unclear how the particle size changes during the transport of colloids. This study investigated the variation of the particle size of ...

Springer2024

Multi-decadal groundwater observations reveal surprisingly stable levels in southwestern Europe

David Andrew Barry

Climate change and human activity are leading to water scarcity in southwestern Europe. Groundwater use is thought to be unsustainable in the region, yet regional assessments using measured data are missing. Here, we evaluate long-term trends and drivers o ...

2024

Deepwater Renewal in a Large, Deep Lake (Lake Geneva): Identifying and Quantifying Winter Cooling Processes Using Heat Budget Decomposition

Ulrich Lemmin, David Andrew Barry, François Mettra, Rafael Sebastian Reiss, Naifu Peng

Wintertime deepwater renewal, which is important for heat-oxygen-nutrient exchange in lakes, is traditionally considered to be mainly driven by 1D vertical convective cooling. However, differential cooling between shallow and deep waters can produce densit ...

Amer Geophysical Union2024

From Particles to Flocs: Revealing Where Flocculation Occurs in the Nearfield of a Negatively-Buoyant River Plume in a Large Lake (Lake Geneva)

Ulrich Lemmin, David Andrew Barry, Htet Kyi Wynn, Valentin Kindschi, Violaine Florette Piton

The dynamics of sediments entering lakes in river plumes is virtually unknown. This field study provides unprecedented evidence of the initiation and evolution of suspended sediment flocculation in the nearfield of the negatively-buoyant Rh & ocirc;ne Rive ...

Amer Geophysical Union2024

Strong bottom currents in large, deep Lake Geneva generated by higher vertical-mode Poincaré waves

Ulrich Lemmin, David Andrew Barry, Rafael Sebastian Reiss

Although internal seiches are ubiquitous in large, deep lakes, little is known about the effect of higher vertical-mode seiches on deepwater dynamics. Here, by combining entire summer season current and temperature observations and 3D numerical modeling, w ...

Springer Science and Business Media LLC2024

Watertable fluctuations in coastal unconfined aquifers with a sloping sea boundary: Vertical flow and dynamic effective porosity effects

David Andrew Barry, Zhaoyang Luo

Interactions between the tide and sloping sea boundary make watertable fluctuations in coastal unconfined aquifers complicated. Based on a perturbation method, we derived a new analytical solution to predict watertable fluctuations for coastal unconfined a ...

2023

What role does stratification play during winter in wind-induced exchange between the multi-depth basins of a large lake (Lake Geneva)?

Ulrich Lemmin, David Andrew Barry, Rafael Sebastian Reiss

Detailed studies of wind-driven interbasin exchange in lakes, focusing on the underlying driving forces and how they are affected by stratification, are presently lacking. We therefore investigated how strati-fication modifies wind-induced exchange between ...

2023