Browsing by Author "Dube, Timothy"
Now showing items 1-20 of 71
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Advancements in satellite remote sensing for mapping and monitoring ofalien invasive plant species (AIPs)
Royimani, Lwando; Mutanga, Onisimo; Dube, Timothy (Elsevier, 2019)Detecting and mapping the occurrence, spatial distribution and abundance of Alien Invasive Plants (AIPs) have recently gained substantial attention, globally. This work, therefore, provides an overview of advancements in ... -
Advancements in the satellite sensing of the impacts of climate and variability on bush encroachment in savannah rangelands
Maphanga, Thabang; Dube, Timothy; Shoko, Cletah (Elsevier, 2022)An increase in shrubs or woody species is likely, directly or indirectly, to significantly affect rural livelihoods, wildlife/livestock productivity and conservation efforts. Poor and inappropriate land use management ... -
Advances in satellite remote sensing of the wetland ecosystems in Sub-Saharan Africa
Thamaga, Kgabo Humphrey; Dube, Timothy; Shoko, Cletah (Taylor and Francis Group, 2022)Wetlands are highly productive systems that act as habitats for avariety of fauna andflora. Despite their ecohydrological signifi-cance, wetland ecosystems are severely under threat from globalenvironmental changes as well ... -
Assessing edge effect on the spatial distribution of selected forest biochemical properties derived using the worldview data in Dukuduku forests, South Africa
Mutanga, Onisimo; Dube, Timothy; Omer, Galal (Wiley, 2019)This work explores the potential of the high‐resolution WorldView‐2 sensor in quan‐tifying edge effects on the spatial distribution of selected forest biochemical proper‐ties in fragmented Dukuduku forest in KwaZulu‐Natal, ... -
Assessing the surface material quality of unpaved rural roads to understand susceptibility to surface deterioration. A case study of four rural areas in KwaZulu-Natal, South Africa
Nkomo, Lucky S'phumelele; Desai, Sumaiya Amod; Dube, Timothy (Elsevier, 2019)Road surface deterioration is one of the most common problems of unpaved road networks worldwide. It is areduction in the performance of a road due to a decline in road surface material quality. Accumulated damagefrom ... -
Carbon stock prediction in managed forest ecosystems using Bayesian and frequentist geostatistical techniques and new generation remote sensing metrics
Chinembiri, Tsikai Solomon; Mutanga, Onisimo; Dube, Timothy (MDPI, 2023)The study compares the performance of a hierarchical Bayesian geostatistical methodology with a frequentist geostatistical approach, specifically, Kriging with External Drift (KED), for predicting C stock using prediction ... -
Characterizing the spatio-temporal variations of C3 and C4 dominated grasslands aboveground biomass in the Drakensberg, South Africa
Shoko, Cletah; Mutanga, Onisimo; Dube, Timothy; Slotow, Rob (Elsevier, 2018)C3 and C4 grass species composition, with different physiological, morphological and most importantly phenological characteristics, influence Aboveground Biomass (AGB) and their ability to provide ecosystem goods and ... -
Correction: sibanda et al. application of drone technologies in surface water resources monitoring and assessment: a systematic review of progress, challenges, and opportunities in the global south. drones 2021, 5, 84
Dube, Timothy; Mazvimavi, Dominic; Sibanda, Mbulisi; Mutanga, Onisimo (Drones, 2022)In the original publication [1], “Fahad Alawadi. Detection of surface algal blooms using the newly developed algorithm surface algal bloom index (SABI)”, “Proc. SPIE 7825, Remote Sensing of the Ocean, Sea Ice, and Large ... -
Determining optimal new generation satellite derived metrics for accurate C3 and C4 grass species aboveground biomass estimation in South Africa
Shoko, Cletah; Mutanga, Onisimo; Dube, Timothy (MDPI, 2018)While satellite data has proved to be a powerful tool in estimating C3 and C4 grass species Aboveground Biomass (AGB), finding an appropriate sensor that can accurately characterize the inherent variations remains a ... -
Developments in the remote sensing of soil erosion in the perspective of sub-Saharan Africa. Implications on future food security and biodiversity
Seutloali, Khoboso E.; Dube, Timothy; Sibanda, Mbulisi (Elsevier, 2018)The remote sensing of soil erosion has gained substantial consideration, with considerable scientific research work having been conducted in the past, due to technological improvements that have resulted in the release of ... -
Discrimination of tomato plants (solanum lycopersicum) grown under anaerobic baffled reactor effluent, nitrified urine concentrates and commercial hydroponic fertilizer regimes using simulated sensor spectral settings
Sibanda, Mbulisi; Mutanga, Onisimo; Dube, Timothy (MPDI, 2019)We assess the discriminative strength of three different satellite spectral settings (HyspIRI, the forthcoming Landsat 9 and Sentinel 2-MSI), in mapping tomato (Solanum lycopersicum Linnaeus) plants grown under hydroponic ... -
Effect of landcover/land-use changes on water availability in and around Ruti Dam in Nyazvidzi catchment, Zimbabwe
Gumindoga, W.; Rwasoka, D.T.; Ncube, N.; Kaseke, E.; Dube, Timothy (Water Research Commission, 2018)The aim of this study was to quantify the upstream land-use and landcover changes and assess their effect on Ruti Dam levels and water availability in Nyazvidzi catchment. Remote-sensing techniques, hydrologic modelling ... -
Effect of landscape pattern and spatial configuration of vegetation patches on urban warming and cooling in Harare metropolitan city, Zimbabwe
Kowe, Pedzisai; Mutanga, Onisimo; Dube, Timothy (Bellweather Publishing, 2021)The spatial configuration of vegetation patches in the landscape has implications for the provision of ecosystem services, human adaptation to climate change, enhancement, or mitigation of urban heat island. Until recently, ... -
Establishing the link between urban land cover change and the proliferation of aquatic hyacinth (Eichhornia crassipes) in Harare Metropolitan, Zimbabwe
Dube, Timothy; Sibanda, Mbulisi; Bangamwabo, Victor (Elsevier, 2018)Urbangrowthisakeyprocessaffectingthefunctioningofnaturalecosystems,andconsequentlythegloballand-surface process. This work aimed at establishing the link between land cover changes around HarareMetropolitancityandtheprol ... -
Estimating above-ground biomass in sub-tropical buffer zone community Forests, Nepal, using Sentinel 2 data
Pandit, Santa; Tsuyuki, Satoshi; Dube, Timothy (MDPI, 2018)Accurate assessment of above-ground biomass (AGB) is important for the sustainable management of forests, especially buffer zone (areas within the protected area, where restrictions are placed upon resource use and special ... -
Evaluating the impact of land use and land cover change on unprotected wetland ecosystems in the arid-tropical areas of South Africa using the Landsat dataset and support vector machine
Thamaga, Kgabo Humphrey; Dube, Timothy; Shoko, Cletah (Taylor and Francis Group, 2022)The study explored the impact of Land Use and Land Cover (LULC) change dynamics in relation to the condition and status of an unprotected wetland located in the arid-tropical parts of the Limpopo Province, South Africa. ... -
Fine-scale characterization of irrigated and rainfed croplands at national scale using multi-source data, random forest, and deep learning algorithms
Kudzai, Mpakairi; Dube, Timothy; Sibanda, Mbulisi (Elsevier [Commercial Publisher], 2023)Knowledge of the extent and distribution of irrigated and rainfed croplands is critical in providing the necessary baseline data for enhancing agricultural efficiency and making informed policy decisions. Accurately ... -
Fine-scale multi-temporal and spatial analysis of agricultural drought in agro-ecological regions of Zimbabwe
Sharara, Alice; Shekede, Munyaradzi Davis; Dube, Timothy (Taylor & Francis, 2022)This study utilised multi-temporal satellite data to characterize droughts across the five Agro-ecological zones (AEZ) of Zimbabwe at monthly, seasonal, sub-seasonal and annual scales (2000 to 2018) using a combination of ... -
From benthic to floating: phytoplankton dynamics in African freshwater lakes and reservoirs
Dube, Timothy; Madzivanzira, Takudzwa C; Mungenge, Chipo P; Dalu, Tatenda (Elsevier, 2023)This chapter reviewed phytoplankton communities in African freshwater lakes and reservoirs and further assessed the latitudinal diversity gradient (LDG) which has been used to explain species variations in other taxonomic ... -
Hierarchical Bayesian geostatistics for C stock prediction in disturbed plantation forest in Zimbabwe
Chinembiri, Tsikai S.; Mutanga, Onisimo; Dube, Timothy (Ecological Informatics, 2022)We develop and present a novel Bayesian hierarchical geostatistical model for the prediction of plantation forest carbon stock (C stock) in the eastern highlands of Zimbabwe using multispectral Landsat-8 and Sentinel-2 ...