A5049035621- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Water resources management and optimization
- Hydrology and Drought Analysis
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Groundwater and Watershed Analysis
- Groundwater flow and contamination studies
- Hydrological Forecasting Using AI
- Climate variability and models
- Climate change impacts on agriculture
- African studies and sociopolitical issues
- Land Rights and Reforms
- Data-Driven Disease Surveillance
- Irrigation Practices and Water Management
- Hydropower, Displacement, Environmental Impact
- Groundwater and Isotope Geochemistry
- Environmental Conservation and Management
- Coastal wetland ecosystem dynamics
- Soil Moisture and Remote Sensing
- Precipitation Measurement and Analysis
- Hydraulic flow and structures
- Soil and Unsaturated Flow
- Fire effects on ecosystems
- Agricultural Innovations and Practices
University of the Western Cape
2023-2024
Council for Scientific and Industrial Research
2012-2023
Rhodes University
2009-2019
Abstract The increasing demand for water in southern Africa necessitates adequate quantification of current freshwater resources. Watershed models are the standard tool used to generate continuous estimates streamflow and other hydrological variables. However, accuracy results is often not quantified, model assessment hindered by a scarcity historical observations. Quantifying uncertainty would increase value credibility predictions. A model-independent framework aimed at achieving...
Communities worldwide are increasingly affected by natural hazards such as floods, droughts, wildfires and storm-waves. However, the causes of these increases remain underexplored, often attributed to climate changes or in patterns human exposure. This paper aims quantify effect change, well land cover on a suite hazards. Changes four (floods, storm-waves) were investigated through scenario-based models using change drivers inputs. Findings showed that human-induced likely increase hazards,...
This paper presents a preliminary stage in the development of an alternative parameterisation procedure for Pitman monthly rainfall runoff model which enjoys popular use water resource assessment Southern Africa. The estimation procedures are based on premise that it is possible to physical basin properties directly quantification soil moisture accounting, runoff, and recharge infiltration parameters. results selected basins show revised parameters at least as good current regionalised sets...
West Africa experienced severe drought during the 1970s and 1980s, posing a threat to water resources. A wetter climate more recently suggests recovery from drought. The Mann-Kendall trend Theil-Sen's slope estimator were applied detect probable trends in weather elements four sub-basins of Niger River Basin between 1970 2010. cross-entropy method was used breakpoints rainfall runoff, Spearman's rank test for correlation two, cross-correlation analysis possible lags. Results showed an...
Abstract The aim of this study was to quantify climate change impact on future blue water (BW) and green (GW) resources as well the associated uncertainties for 4 subbasins Beninese part Niger River Basin. outputs 3 regional models (HIRHAM5, RCSM, RCA4) under 2 emission scenarios (RCP4.5 RCP8.5) were downscaled historical period (1976–2005) (2021–2050) using Statistical DownScaling Model (SDSM). Comparison variables between these periods suggests that rainfall will increase (1.7% 23.4%)...
Study Region: The Kwando (Cuando) River and the western headwaters of Zambezi River, which are data-scarce basins southern Africa. Focus: A comparative analysis performance two fundamentally different hydrological modelling approaches (a conceptual model a theory guided machine learning model) in data-sparse region. New Hydrological Insights for (HydroForecast) generally performs better – terms statistical fit between simulated observed flows than (Pitman). For explicitly simulates expected...
The Pungwe River Basin, which is predominantly rural, a transboundary river shared between Zimbabwe and Mozambique. riparian communities along the largely depend on availability of streamflow for their livelihoods are now being threatened by effects changing climate. study assessed climate change water resources in 10 selected headwater sub-catchments Basin using Pitman hydrological model. model was driven statistically downscaled models forced with RCP 4.5 8.5 near (2020–2060) far...
Understanding the relative impact of land use, cover (LULC) and climate change (CC) on basin runoff is necessary in assessing water stress, for which long-term observed rainfall time series LULC spatial data are required. However, there challenges with availability spatio-temporal data, particularly limited range available historical hydro-meteorological measurements. The study used (1961–2007) to drive Pitman monthly rainfall–runoff model assess changes resources three basins Nigeria—Asa,...
Non-perennial rivers (NPRs) have three hydrological states; each state has its importance, function and implication for water resource management. The dynamics of these states been inadequately assessed understood. Hence, this study sought to determine the spatiotemporal variations in conditions NPRs, focusing on Touws River–Karoo drylands Molototsi River within semi-arid region Limpopo Province South Africa. Additionally, aimed delineate characterize primary areas contributing runoff two...
Recharge estimation in arid and semi-arid areas is very challenging. The chloride mass balance method applied western South Africa fails to provide reliable recharge estimates near coastal areas. A relationship between rainfall events water level fluctuations (WLF) on a monthly basis was proposed the infiltration breakthrough (RIB) model for purpose of groundwater estimation. In this paper, physical meaning parameters CRD previous RIB models clarified, reviewed with algorithm improved...
Additional surface–ground water interaction routines were recently added to the Pitman monthly rainfall–runoff model, widely used in South Africa for quantifying resources ungauged catchments. Some evaluations of model have demonstrated that it can realistically simulate interactions between surface and ground at catchment scales approximately 100 5,000 km2. The allows abstractions be simulated, but no reported this component are available. This study uses estimate sustainable abstraction...
The most appropriate scale to use for hydrological modelling depends on the model structure, purpose of results and resolution available data used quantify parameter values provide climatic forcing. There is little consensus amongst community users complexity number parameters that are needed satisfactory simulations. These issues not independent scale, methods values, nor This paper reports an investigation spatial effects application approach (with uncertainty) a rainfall-runoff with...
Abstract. The demand for water resources is rapidly growing, placing more strain on access to and its management. In order appropriately manage resources, there a need accurately quantify available resources. Unfortunately, the data required such assessment are frequently far from sufficient in terms of availability quality, especially southern Africa. this study, uncertainty related estimation two sub-basins Limpopo River Basin – Mogalakwena South Africa Shashe shared between Botswana...
Abstract. Water availability is one of the major societal issues facing world. The ability to understand and quantify impact key hydrological processes, on water resources, therefore integral ensuring equitable sustainable resource management. Channel transmission losses are an “under-researched” process that affects in many semi-arid regions such as Limpopo River Basin southern Africa, where loss processes amount approximately 30 % balance. To improve understanding these test capability...