Browsing Earth Sciences by Title
Now showing items 221-240 of 268
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Sustainable groundwater use, the capture principle, and adaptive management
(Water Research Commission, 2006)The purpose of this paper is to review the case for using ‘capture’ rather than recharge as the conceptual basis for sustainable groundwater use in South Africa. Capture refers to the sum of the increase in recharge and ... -
A synthesis of past, current and future research for protection and management of papyrus (Cyperus papyrus L.) wetlands in Africa
(Springer Verlag, 2014)Papyrus wetlands (dominated by the giant sedge Cyperus papyrus L.) occur throughout eastern, central and southern Africa and are important for biodiversity, for water quality and quantity regulation and for the livelihoods ... -
A systematic review on the use of remote sensing technologies in quantifying grasslands ecosystem services
(2022)The last decade has seen considerable progress in scientific research on vegetation ecosystem services. While much research has focused on forests and wetlands, grasslands also provide a variety of different provisioning, ... -
A tensor approach to the estimation of hydraulic conductivities in Table Mountain Group aquifers of South Africa
(Water Research Commission, 2006)Based on the field measurements of the physical properties of fractured rocks, the anisotropic properties of hydraulic conductivity (HC) of the fractured rock aquifer can be assessed and presented using a tensor approach ... -
Theory, change and the search for epistemological courage in shaping a new world order
(SAGE Publications, 2022)No matter how narrowly you focus your spatial or temporal lenses, you are bound to catch sight of multiple significant challenges to human community. Many of these challenges are shared, such as Covid-19, though their ... -
The thousand-Pulsar-Array programme on MeerKAT - VI. Pulse widths of a large and diverse sample of radio pulsars
(Oxford, 2022)We present pulse width measurements for a sample of radio pulsars observed with the MeerKAT telescope as part of the Thousand-Pulsar-Array (TPA) programme in the MeerTime project. For a centre frequency of 1284 MHz, we ... -
A three-tier approach to protect groundwater resources in South Africa
(Water Research Commission, 1995)The quality of groundwater is affected by many activities occurring on the surface of the earth. A pro-active protection approach is required to avoid the costly and technology difficult exercise of groundwater remediation. ... -
The tianlai cylinder pathfinder array: System functions and basic performance analysis
(Springer, 2020)The Tianlai Cylinder Pathfinder is a radio interferometer array designed to test techniques for 21 cm intensity mapping in the post-reionization Universe, with the ultimate aim of mapping the large scale structure and ... -
The timing and tectonic context of Pan-African gem bearing pegmatites in Malawi: Evidence from Rb–Sr and U–Pb geochronology
(Elsevier, 2023)The Pan-African belts of Malawi contain a largely unexplored endowment of gem bearing pegmatites. We present U–Pb in zircon (LA-ICPMS) and Rb–Sr mineral isochron geochronological and isotope data from pegmatites across ... -
Towards a gender sensitive vulnerability assessment for climate change: Lambani, Limpopo Province, South Africa
(SAGE, 2019)Women’s limited access to resources and decisionmaking processes increases their vulnerability to impacts of climate change. Despite their own vulnerability, women are often responsible for caring for close relatives, ... -
Towards an ethnography of climate change variability: Perceptions and coping mechanisms of women and men from Lambani village, Limpopo province
(SAGE, 2017)Attention to gender and equity has lagged behind in climate change research, programming, national policy-making and in the international negotiations. Studies on climate change and gender links with climate change ... -
Transformation between phreatic water and soil water during freeze–thaw periods
(MDPI, 2018)During freeze–thaw periods, the exchange between shallow groundwater and soil water is unusually strong and bidirectional, which causes soil salinization and affects the accuracy of water resources assessment. The ... -
Transitioning towards a circular bioeconomy in South Africa: Who are the key players?
(Academy of Science of South Africa, 2022)The transition towards a circular economy is becoming a priority in many countries globally. However, the circular bioeconomy has received relatively less attention. In South Africa, the valorisation of organic waste is a ... -
Trends in elephant poaching in the Mid-Zambezi Valley, Zimbabwe: Lessons learnt and future outlook
(African Journal of Ecology, 2023)Background: The conservation of African elephants (Loxodonta africana) has important ecological, economical, cultural and aesthetic values, at both local and global levels (Pittiglio et al., 2014). Despite the important ... -
Two pulses of Mesoproterozoic intra-plate magmatism in the heart of the Palaeoproterozoic Ubendian Domain of northern Malawi
(Elsevier, 2023)Two Mesoproterozoic anorogenic igneous events are recorded in the Palaeoproterozoic Ubendian Domain in northern Malawi. The oldest is represented by the Mwakikome orthogneiss, a small peraluminous, sub-alkaline and ferroan ... -
A two-step approach for detecting Striga in a complex agroecological system using Sentinel-2 data
(Elsevier, 2021)Information on weed occurrence within croplands is vital but is often unavailable to support weeding practices and improve cropland productivity assessments. To date, few studies have been conducted to estimate and map ... -
Understanding climate change effects on the potential distribution of an important pollinator species, Ceratina moerenhouti (Apidae: Ceratinini), in the Eastern Afromontane biodiversity hotspot, Kenya
(Elsevier, 2023)Monitoring key pollinator taxa such as the genus Ceratina requires precise near real-time predictions to facilitate better surveillance. The potential habitat suitability of Ceratina moerenhouti was predicted in the Eastern ... -
Understanding climate change effects on the potential distribution of an important pollinator species, ceratina moerenhouti (apidae: ceratinini), in the eastern afromontane biodiversity hotspot, Kenya
(Elsevier Ltd, 2023)Monitoring key pollinator taxa such as the genus Ceratina requires precise near real-time predictions to facilitate better surveillance. The potential habitat suitability of Ceratina moerenhouti was predicted in the Eastern ... -
Understanding seasonal dynamics of invasive water hyacinth (eichhornia crassipes) in the greater letaba river system using sentinel-2 satellite data
(Taylor & Francis Online, 2019)Water hyacinth (Eichhornia crassipes) is one of the most aggressive and lethal free-floating aquatic weed that degrades and chokes freshwater ecosystems and threatens aquatic life. Early detection and up-to-date information ... -
Understanding the influence of land cover change and landscape pattern change on evapotranspiration variations in Gwayi catchment of Zimbabwe
(Taylor and Francis Group, 2022)Understanding dynamics in hydrological processes helps toimprove water resource management. Climate and land coverchanges influence ecohydrological processes. This study soughtto assess the influence of climate, land ...