A5023716591- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Hydrology and Sediment Transport Processes
- Flood Risk Assessment and Management
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Groundwater and Isotope Geochemistry
- Peatlands and Wetlands Ecology
- Water resources management and optimization
- Soil erosion and sediment transport
- Groundwater and Watershed Analysis
- Integrated Water Resources Management
- Landslides and related hazards
- Hydrological Forecasting Using AI
- demographic modeling and climate adaptation
- Fire effects on ecosystems
- Soil Moisture and Remote Sensing
- Climate change impacts on agriculture
- Environmental Monitoring and Data Management
- Seismic Imaging and Inversion Techniques
- Health Policy Implementation Science
- Geophysical Methods and Applications
- Geophysical and Geoelectrical Methods
- Hydraulic flow and structures
- Mine drainage and remediation techniques
National Centre for Groundwater Research and Training
2015-2024
Flinders University
2015-2024
The University of Adelaide
2011-2014
Abstract Intermittent rivers and ephemeral streams (IRES) account for over 50% of the world's river network are expected to increase with climate change increasing pressure on water resources. One significant challenge better manage IRES is unraveling threshold behavior streamflow generation, by understanding what controls triggers streamflow. This study aimed understand influence groundwater depth, soil hydraulic properties, rainfall generation in IRES, through analyzing spatiotemporal...
[1] The understanding of streamflow generation processes is vitally important in the management water resources. In absence data required to achieve this, Integrated Surface-Subsurface Hydrological Models (ISSHM) can be used assist with development this understanding. However, standard outputs from these models only enable elicitation information about hydrological drivers and responses that occur at same time. This generally limits applicability ISSHMs for purposes obtaining an improved...
Abstract The streambed constitutes the physical interface between surface and subsurface of a stream. Across all spatial scales, properties control water‐groundwater interactions. Continuous alteration such as topography or hydraulic conductivity occurs through erosion sedimentation processes. Recent studies from fields ecology, hydrogeology, sedimentology provide field evidence that sedimentological processes themselves can be heavily influenced by interactions, giving rise to complex...
Abstract Studies employing integrated surface–subsurface hydrological models (ISSHMs) have utilized a variety of test cases to demonstrate model accuracy and consistency between codes. Here, we review the current state ISSHM testing evaluate most popular by comparing hydrodynamic processes simulated in each case found well‐characterized, real‐world catchments their general attributes those successful benchmark problems from other fields hydrogeology. The reveals that (1) intercode comparison...
Abstract To provide a sound understanding of the sources, pathways, and residence times groundwater water in alluvial river‐aquifer systems, combined multitracer modeling experiment was carried out an important drinking wellfield Switzerland. 222 Rn, 3 H/ He, atmospheric noble gases, novel 37 Ar‐method were used to quantify mixing ratios from different sources. With half‐life 35.1 days, Ar allowed successfully close critical observational time gap between Rn He for weeks months. Covering...
Abstract As hydrological systems are pushed outside the envelope of historical experience, ability current models to serve as a basis for credible prediction and decision making is increasingly challenged. Conceptual most common type surface water model used support due reasonable performance in absence change, ease use computational speed that facilitate scenario, sensitivity uncertainty analysis. Hence, conceptual effect represent “shopfront” science seen by practitioners. However, these...
Abstract Alluvial sand and gravel (ASG) aquifers are highly heterogeneous exhibit strong, spatially variable anisotropy, often interspersed by buried paleo‐channels of increased hydraulic conductivity. Groundwater flow solute transport is characterized preferential caused anisotropic properties in ASG aquifers. Connected subsurface structures such as paleo‐channels, however, difficult to reproduce with commonly used techniques, anisotropy rarely considered applied groundwater models. To ease...
Abstract The ecologically and biogeochemically significant perirheic zone is a part of the floodplain where waters originating from both river adjacent are present. In this study, we investigate spatiotemporal dynamics active zone, that is, their transient mixing extent. This achieved by using Hydraulic Mixing‐Cell method, complement to fully integrated surface‐subsurface hydrological model, in Biebrza catchment, northeast Poland. model performance verified against hydrochemical data sets....
Abstract. Streamflow dynamics for non-perennial networks remain poorly understood. The highly nonlinear unsaturated associated with the transitions between wetting and drying in systems make modelling cumbersome. This has stifled previous attempts alludes to why there is still a knowledge gap. In this study, we first construct conceptual model of physical processes streamflow generation an intermittent river system South Australia, based on hypothesis that vertical longitudinal soil...
Lower Campaspe, North Central Victoria, Australia This paper presents a component-based integrated environmental model developed through participatory processes to explore sustainable water management options. Possible futures with improved farm profitability and ecological outcomes relative modelled baselines were identified exploratory modelling. The the results produced are intended raise awareness facilitate discussion amongst stakeholders. modelling illustrates that level knowledge...
Ephemeral and intermittent flow in dryland streams plays a vital role supporting delicate ecosystems recharging groundwater underlying aquifers. Despite extensive research, accurately predicting surface runoff, streambed water infiltration, recharge during ephemeral streamflow events remains challenging due to the complex physical processes involved. Such are logistically difficult observe field should not be assessed through numerical studies alone. To tackle this complexity, we utilised an...
Abstract Tracer hydrograph separation has been widely applied to identify streamflow components, often indicating that pre‐event water comprises a large proportion of stream water. Previous work using numerical modeling suggests hydrodynamic mixing in the subsurface inflates contribution when derived from tracer‐based separation. This study compares effects dispersion, both within and at surface‐subsurface boundary, on streamflow. Using fully integrated code, we simulate two hypothetical 2‐D...
Abstract Intercomparison of surface water‐groundwater (SW‐GW) exchange fluxes at the regional scale is rarely undertaken, mainly because estimates are method and scale‐dependent usually associated with large errors. In present study, we compare SW‐GW calculated from a multitracer mass balance in river, an application Darcy's law using near‐river piezometers surface‐subsurface flow model calibrated catchment scale. estimated for 7 km long reaches along 140 Campaspe River, tributary Murray...
Abstract. Riparian zones are known to modulate water quality in stream corridors. They can act as buffers for groundwater-borne solutes before they enter the at harmful, high concentrations or facilitate solute turnover and attenuation where (SW) groundwater (GW) mix. This natural capacity is strongly controlled by dynamic exchange of between adjoining aquifer, creating potential mixing-dependent reactions take place. Here, we couple a previously calibrated transient fully integrated 3D...
Abstract The origins of river and floodplain waters (groundwater, rainfall, snowmelt) their extent during overbank flow events strongly impact ecological processes such as denitrification vegetation development. However, the long‐term sensitivity water signatures to climate change remains elusive. We examined how integrated hydrological model HydroGeoSphere Hydraulic Mixing‐Cell method could help us understand on spatial distribution in protected Biebrza River Catchment northeastern Poland....