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Now showing items 21-40 of 389

Aquaculture and fisheries decision support tool

Author: Smith, Marie E ; Vhengani, Lufuno M Date: May 2023 This presentation speaks to the challenges with environmental threats such as Harmful Algal Blooms (HABs) and ocean heatwaves that have the potential to negatively affect natural and farmed marine resources. Also, monitoring these events ... Read more
Aquatic environment exposure and toxicity of engineered nanomaterials released from nano-enabled products: Current status and data needs

Author: Moloi, MS ; Lehutso, Raisibe F ; Erasmus, M ; Oberholster, PJ ; Thwala, Melusi Date: Oct 2021 Rapid commercialisation of nano-enabled products (NEPs) elevates the potential environmental release of engineered nanomaterials (ENMs) along the product life cycle. The current review examined the state of the art literature on aquatic ... Read more
Aquatic toxicity effects and risk assessment of ‘Form Specific’ product-released engineered nanomaterials

Author: Lehutso, Raisibe F ; Wesley-Smith, J ; Thwala, Melusi Date: Nov 2021 The study investigated the toxicity effects of ‘form specific’ engineered nanomaterials (ENMs) and ions released from nano-enabled products (NEPs), namely sunscreens, sanitisers, body creams and socks on Pseudokirchneriella subcapitata, ... Read more
Assessing alternative supporting organic materials for the enhancement of water reuse in subsurface constructed wetlands receiving acid mine drainage

Author: Oberholzer, MM ; Oberholster, PJ ; Ndlela, Luyanda L ; Botha-Oberholtster, AM ; Truter, CJ Date: Jun 2022 Acid mine drainage (AMD) is a global problem with severe consequences for the environment. South Africa’s abandoned mines are a legacy from the country’s economic dependence on the mining sector, with consequent negative impacts on ecosystems. ... Read more
Assessing economic vulnerability in South African municipalities: A focus on mining-dependent regions using the Economic Complexity Index

Author: Rossouw, R ; Maritz, Johan Date: Dec 2023 South Africa’s historical reliance on mineral resources has established thriving towns and settlements, sustaining households for decades. However, the decline in demand for these resources and mine closures pose significant threats to the ... Read more
Assessing heavy metal pollution hazard in sediments of Lake Mariout, Egypt

Author: Abu El-Magd, SA ; Taha, TH ; Pienaar, Harrison H ; Breil, P ; Amer, RA ; Namour, PH Date: Apr 2021 The Cd, Cr, Cu, Ni, and Pb concentrations in the sediments of Lake Mariout were measured and estimated by statistical approaches using the contamination factor (CF), pollution load index (PLI), geo-accumulation index (Igeo), Nemerow index ... Read more
Assessing water resources availability in headwater sub-catchments of Pungwe River Basin in a changing climate

Author: Gumbo, AD ; Kapangaziwiri, Evison ; Chikoore, H ; Pienaar, Harrison H Date: Jun 2021 Study Region: The Pungwe River Basin, which is predominantly rural, is a transboundary river shared between Zimbabwe and Mozambique. The riparian communities along the river largely depend on the availability of streamflow for their livelihoods ... Read more
Assessment of food losses and waste at the Tshwane market and small scale farms

Author: Ramukhwatho, Fhumulani R ; Oelofse, Suzanna HH ; Musvoto, Constansia D ; Polasi, Letlotlo T Date: Feb 2021 Food losses and waste are issues of global concern as they contribute to greenhouse gas emissions. It is estimated that agricultural production and marketing contribute a large portion of food waste in the value chain. This paper reports on ... Read more
Assessment of homegarden agroforestry for sustainable land management intervention in a degraded landscape in South Africa

Author: Musvoto, Constansia D ; Kgaphola, Motsoko J ; Mwenge Kahinda, Jean-Marc Date: Dec 2021 Agroforestry-based sustainable land management (SLM) interventions provide opportunities for tackling land degradation and its associated socio-economic issues. Agroforestry is not a guaranteed SLM fix as every agroforestry practice is not ... Read more
Assessment of satellite-derived rainfall and its use in the ACRU agro-hydrological model

Author: Suleman, Shuaib ; Chetty, KT ; Clark, DJ ; Kapangaziwiri, Evison Date: Nov 2020 Unfortunately, for various reasons, in-situ rain gauge networks are diminishing, especially in southern Africa, resulting in sparse networks whose records give a poor representation of rainfall occurrence, patterns andmagnitudes. Hydrological ... Read more
ASTRAL pool of technologies: Digital twins to support IMTA within the Atlantic area

Author: Pias, M ; Orazi, G ; Drews, P ; Paris, M ; Dupont, C ; Smith, Marie E ; Michalek, K ; Lain, L ; Martinez, J ; Khelifi, I Date: Sep 2022 Presentation on the ASTRAL pool of technologies: Digital twins to support IMTA within the Atlantic area. Read more
Atlas of industrial wastewater reuse potential in South Africa

Author: Steyn, Maronel ; Walters, Chavon R ; Mathye, Salamina M ; Ndlela, Luyanda L ; Thwala, Melusi ; Banoo, Ismail ; Tancu, Yolanda ; Genthe, Bettina Date: Mar 2021 The South African economy largely depends on mining and other large industries. According to the National Water Resources Strategy 2 (DWA, 2013a), the mining sector, with an estimated demand of about 5% of the country’s available water, is a ... Read more
Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean

Author: Edholm, JM ; Swart, S ; Plessis, Marcel D ; Nicholson, Sarah-Anne Date: Aug 2022 Atmospheric rivers (ARs) dominate moisture transport globally; however, it is unknown what impact ARs have on surface ocean buoyancy. This study explores the surface buoyancy gained by ARs using high-resolution surface observations from a ... Read more
Bacteria and archaea regulate particulate organic matter export in suspended and sinking marine particle fractions

Author: Dithugoe, Choaro D ; Bezuidt, OKI ; Cavan, EL ; Froneman, WP ; Thomalla, Sandy J ; Makhalanyane, TP Date: Apr 2023 The biological carbon pump (BCP) in the Southern Ocean is driven by phytoplankton productivity and is a significant organic matter sink. However, the role of particle-attached (PA) and free-living (FL) prokaryotes (bacteria and archaea) and ... Read more
Barriers to closing the loop on nutrient recycling - a case study on phycoremediation of domestic wastewater in South Africa

Author: Steyn, Maronel ; Oberholster, PJ Date: Dec 2021 Sustainable development and the global move towards a more circular use of resources, where waste is reduced and resources are recycled, have caused a paradigm shift within the scientific community with regards to wastewater solutions. Nutrient ... Read more
Battery energy storage systems value chain analysis for the identification of opportunities for enterprise development

Author: Pandarum, Aradhna ; Rakaibe, Tshwanelo K ; Mbam, Vuyo Date: Oct 2023 South Africa is confronted by the triple threat of inequality, poverty, and unemployment and has the highest inequality and unemployment rate in the world. The energy transition to a low carbon economy offers significant opportunity for the ... Read more
A benchmark dataset for defect detection and classification in electroluminescence images of PV modules using semantic segmentation

Author: Pratt, Lawrence E ; Matheus, Jana ; Klein, R Date: Dec 2023 Electroluminescence (EL) images enable defect detection in solar photovoltaic (PV) modules that are otherwise invisible to the naked eye, much the same way an x-ray enables a doctor to detect cracks and fractures in bones. This paper presents ... Read more c b n d
Bio-optical and biogeochemical parameterization of IOP-traceable, hyperspectral Rrs datasets for transitional water applications

Author: Lain, Lisl ; Kravitz, J ; Smith, Marie E Date: Nov 2023 The diversity of phytoplankton communities and the robustness of ecosystem stability over annual and interannual time scales is not well characterized in South Africa. Extensive optical & biogeochemical field measurements are being collected ... Read more
Biodiversity and Ecosystem Services on the African continent – what is changing, and what are our options?

Author: Archer, E ; Dziba, LE ; Mulongoy, KJ ; Maoela, Malebajoa A ; Walters, Michele ; Biggs, R ; Cormier Salem, M-C ; DeClerck, F ; Diaw, MC ; Dunham, AE Date: Mar 2021 Throughout the world, biodiversity and nature's contributions to people are under threat, with clear changes evident. Biodiversity and ecosystem services have particular value in Africa– yet they are negatively impacted by a range of drivers, ... Read more
Blue carbon sinks in South Africa and the need for restoration to enhance carbon sequestration

Author: Raw, JL ; Van Niekerk, Lara ; Chauke, O ; Riddin, T ; Adams, JB Date: Feb 2023 Blue carbon ecosystems (mangroves, salt marshes, and seagrasses) contribute towards climate change mitigation because they are efficient at sequestering atmospheric CO2 into long-term total ecosystem carbon stocks. Destruction or disturbance ... Read more

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