A5020314660- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Hydrology and Watershed Management Studies
- Groundwater and Watershed Analysis
- Soil and Water Nutrient Dynamics
- Water Quality and Pollution Assessment
- Botany and Plant Ecology Studies
- Flood Risk Assessment and Management
- Plant Taxonomy and Phylogenetics
- Water Treatment and Disinfection
- Water resources management and optimization
- Geophysics and Gravity Measurements
- Insect Resistance and Genetics
- Plant-Microbe Interactions and Immunity
- Radioactive contamination and transfer
- Water Quality and Resources Studies
- FinTech, Crowdfunding, Digital Finance
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Karst Systems and Hydrogeology
- Botanical Studies and Applications
- Water-Energy-Food Nexus Studies
- Geophysical and Geoelectrical Methods
- Forest ecology and management
- Plant tissue culture and regeneration
Stellenbosch University
2014-2024
Swiss Federal Institute of Aquatic Science and Technology
2023-2024
Universität Hamburg
2018
Abstract Global hydrological alterations are being driven by climate change. However, while modelling tools have been instrumental in identifying these changes, their calibration is often dependent solely on streamflow data, which limits the ability to simulate important processes with required level of certainty. Constraining process simulations identify robust model parameters, reducing uncertainty and providing a baseline for climate‐related risk assessments. In this study, stable isotope...
Abstract The Cape Fold Belt, comprising folded sedimentary sequences from predominantly the Palaeozoic Supergroup, hosts a multitude of manganese occurrences and mineral deposits, many which were subject to historical mining activity. Although size, grade quality issues negate their modern-day exploitation for steel-making process, mechanisms by Mn has enriched at these sites holds scientific value our understanding low-temperature (bio-)geochemical cycling. Deposits located within Belt...
Abstract Tritium ( 3 H) has become synonymous with modern groundwater and is used in a myriad of applications, ranging from sustainability investigations to contaminant transport vulnerability. This study uses measured H activities 722 sample locations across South Africa construct distribution surface. Environmental covariables are tested using geostatistical analysis constrain external controls on variability, namely: (a) depth groundwater, (b) distance the ocean, (c) summer versus winter...
Water quantity and quality in Mediterranean catchments are of concern due to evaporation rates often exceeding rainfall rates. Spatio-temporal hydrological shifts caused by climate change within these environments affect the catchment's hydrodynamics. The Western Cape region South Africa boasts is dependent on surface water recharge dams, which support various industrial, domestic, agricultural sectors. 2015 – 2018 drought decreased contribution sources, leading an increase...
Abstract Isotope‐enabled models provide a means to generate robust hydrological simulations. However, daily isotope‐enabled rainfall‐runoff applied larger spatial scales (>100 km 2 ) require more input data than conventional non‐isotope in the form of precipitation isotope time series, which are difficult even with point station measurements. Spatially distributed can be circumvented by climate models. Here, we evaluate simulations J2000‐isotope enabled model driven from corrected and...
ABSTRACT Climate change, inter‐annual precipitation variability, recurrent droughts and flash flooding, coupled with increasing water needs, are shaping the co‐evolution of socioeconomic cultural assemblages, laws regulations, equitable drinking access allocation worldwide. Recognising need for mitigation strategies availability in urban areas, Isotope Hydrology Section International Atomic Energy Agency (IAEA) coordinated a state‐of‐the‐art global assessment to evaluate sources distribution...
Understanding the way in which a water budget is distributed within hydrological system imperative prediction of systems behaviour when this has changed. A complex interaction variable flow rates, residence times and reactive transport, controls available streamflow river not only over seasonal changes, but under longer term climate fluctuations as well. Hydrological modelling techniques have been instrumental predicting these changes by monitoring/simulating rainfall, groundwater...
Abstract Understanding recharge is an important step to quantify the sustainability of groundwater reserve and promoting adequate implementation management policies. In southern Brazil, Guarani Aquifer System (SAG) increasingly utilised as a source water for both rural/urban populations agricultural activities. Being 90% confined, regional SAG outcrop zones are generally considered areas, yet local system mechanics have still be constrained. Water table time series data over two-year period...
<p>Stable and radioactive isotope tracers, for the purpose of recharge investigations, are well constrained in literature include a number reviews describing benefits using tracers this purpose. Tritium (<sup>3</sup>H), hydrogen, has been used to better understand groundwater processes decades. During 1960’s 1970’s popularity <sup>3</sup>H hydrological investigations increased as result elevated...
Tritium (³H) has become synonymous with modern groundwater and is used in a myriad of applications, ranging from sustainability investigations to contaminant transport vulnerability. This study uses measured ³H activities 722 samples locations across South Africa construct distribution surface. Environmental co-variables are tested using geostatistical analysis constrain external controls on variability, namely: [1] depth the water table, [2] distance ocean [3] summer vs winter rainfall...
<p>During 2017-2018, the City of Cape Town, South Africa faced an unprecedented drought crisis with six main water storages supplying Town falling to a combined capacity just under 20%. Throughout crisis, groundwater was considered most important alternative urban supply source but also vulnerable contamination through accidental return flows from municipal network, private residences and agricultural industries. This project aimed constrain stable isotope chemistry network in...