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Browsing by Author "Madonsela, Sabelo"

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The delineation of alluvial aquifers towards a better understanding of channel transmission losses in the Limpopo River Basin

Author: Mvandaba, Vuyelwa ; Hughes, D ; Kapangaziwiri, Evison ; Mwenge Kahinda, Jean-Marc ; Hobbs, Philip J ; Madonsela, Sabelo ; Oosthuizen, Nadia Date: Dec 2018 Understanding the impact of key hydrological processes on the availability of water resources is an integral component of equitable and sustainable integrated water resource management. Previous hydrological studies conducted in the Limpopo ... Read more
Estimating South African maize biomass using integrated high-resolution UAV and sentinel 1 and 2 datasets

Author: Naidoo, Laven ; Main, Russell S ; Cho, Moses A ; Madonsela, Sabelo ; Majozi, Nobuhle, P Date: Jul 2021 Sentinel-1 and Sentinel-2 have provided consistent hyper-temporal information (5–7 days or earlier) at high spatial resolutions (10m) on biophysical composition, structural and physiological conditions of crops in a variety of environments. ... Read more
Estimating tree species diversity in the savannah using NDVI and woody canopy cover

Author: Madonsela, Sabelo ; Cho, Moses A ; Ramoelo, Abel ; Mutanga, O ; Naidoo, Laven Date: Apr 2018 Remote sensing applications in biodiversity research often rely on the establishment of relationships between spectral information from the image and tree species diversity measured in the field. Most studies have used normalized difference ... Read more
Exploring the utility of Sentinel-2 for estimating maize chlorophyll content and leaf area index across different growth stages

Author: Madonsela, Sabelo ; Cho, Moses A ; Naidoo, Laven ; Main, Russell S ; Majozi, Nobuhle P Date: Dec 2021 This study investigated the utility of Sentinel-2 spectral data for estimating leaf area index (LAI), leaf and canopy chlorophyll content of maize at different growth stages. Vegetation indices based on the visible-near infrared and red-edge ... Read more
Investigating the relationship between tree species diversity and landsat-8 spectral heterogeneity across multiple phenological stages

Author: Madonsela, Sabelo ; Cho, Moses A ; Ramoelo, Abel ; Mutanga, O Date: Jun 2021 The emergence of the spectral variation hypothesis (SVH) has gained widespread attention in the remote sensing community as a method for deriving biodiversity information from remotely sensed data. SVH states that spectral heterogeneity on ... Read more
Machine learning modelling of crop structure within the Maize Triangle of South Africa

Author: Naidoo, Laven ; Main, Russell S ; Cho, Moses A ; Madonsela, Sabelo ; Majozi, Nobuhle, P Date: Jan 2022 Maize has been identified as a strategic commodity for the reduction of poverty and enhancement of food security in the African continent. Climate variability and difficult economic conditions are pressuring farmers to produce higher (maize) ... Read more
Multi-phenology WorldView-2 imagery improves remote sensing of savannah tree species

Author: Madonsela, Sabelo ; Cho, Moses A ; Mathieu, Renaud SA ; Mutanga, O ; Ramoelo, Abel ; Kaszta, Z ; Van De Kerchove, R ; Wolff, E Date: Jun 2017 Biodiversity mapping in African savannah is important for monitoring changes and ensuring sustainable use of ecosystem resources. Biodiversity mapping can benefit from multi-spectral instruments such as WorldView-2 with very high spatial ... Read more
Predicting land degradation using Sentinel-2 and environmental variables in the Lepellane catchment of the Greater Sekhukhune District, South Africa

Author: Nzuza, P ; Ramoelo, Abel ; Odindi, J ; Mwenge Kahinda, Jean-Marc ; Madonsela, Sabelo Date: Sep 2020 Land degradation is defined as the reduction of biological and economic productivity, which impedes the capacity of the land to provide ecosystem services. There is a need to move towards near real-time monitoring of land degradation using ... Read more
Remote sensing of species diversity using Landsat 8 spectral variables

Author: Madonsela, Sabelo ; Cho, Moses A ; Ramoelo, Abel ; Mutanga, O Date: Nov 2017 The application of remote sensing in biodiversity estimation has largely relied on the Normalized Difference Vegetation Index (NDVI). The NDVI exploits spectral information from red and near infrared bands of Landsat images and it does not ... Read more

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Browsing by Author "Madonsela, Sabelo"

Browsing by Author "Madonsela, Sabelo"

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Social Connect