A5009729263- Land Use and Ecosystem Services
- Soil erosion and sediment transport
- Ecology and Vegetation Dynamics Studies
- Rangeland Management and Livestock Ecology
- Hydrology and Watershed Management Studies
- Conservation, Biodiversity, and Resource Management
- Hydrology and Sediment Transport Processes
- Remote Sensing in Agriculture
- Soil Carbon and Nitrogen Dynamics
- Flood Risk Assessment and Management
- Climate variability and models
- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Remote Sensing and LiDAR Applications
- Landslides and related hazards
- Local Economic Development and Planning
- Land Rights and Reforms
- Pasture and Agricultural Systems
- Science and Climate Studies
- Forest Management and Policy
- Hydrology and Drought Analysis
- Mine drainage and remediation techniques
- Remote-Sensing Image Classification
- Cryospheric studies and observations
- Wildlife-Road Interactions and Conservation
University of Eldoret
2023
Nelson Mandela University
2013-2022
Abstract The origins and development of severe forms erosion are traced in the communal villages located a part dividing ridge between Great Fish Keiskamma rivers near Peddie town, Eastern Cape, South Africa. Progressive changes land use soil distribution reconstructed by analysing sequential aerial photographs area 1938 1988. distributions two phenomena mapped quantified at different dates using PC ARC/INFO GIS. Observable is confined to lands all dates. Widespread abandonment cultivated...
Abstract What is overgrazing? Does it cause soil erosion? The recent debate from the ecological literature reviewed as background to on overgrazing and erosion. This stresses need view dryland grazing systems dynamic ecosystems driven more by rainfall events than livestock numbers. case for erosion then examined. Two studies communal rangelands in Eastern Cape, South Africa, have cast doubts conventional wisdom that leads first, a study of historical land‐use change area, showed most intense...
Urban population increase has caused significant urban landscape transformation globally. Before 1994, South Africa's highly regulated growth was shaped by the restrictive Prevention of Illegal Squatters Act 1951. After abolishment act in 1980s, period transition to democracy 1990s characterised an unprecedented influx that a myriad socio-economic and environmental challenges. These challenges have consequently compounded need monitor for planning optimisation spaces. The limitations...
The study examined the applicability of Combined Drought Index (CDI), Standardized Precipitation (SPI) and IHACRES (identification unit hydrographs component flows from rainfall, evaporation streamflow data) model in characterizing extreme weather events relation to variations River Malaba. results showed that return period had reduced 4–10 1–3 years over catchment. CDI was a better predictor drought (2005–2006) than SPI, which for flood (2006, 1997 2008) performance with Nash–Sutcliffe...
While most climate change vulnerability assessments focus on regional or city-levels, this paper studies villages and their different forms of vis-
ABSTRACT The invader shrub Pteronia incana has colonised extensive areas in communal villages, commercial farms and game reserves the Eastern Cape Province, South Africa. spatial temporal trends patchiness dynamics for P. their implications landscape connectivity functionality were analysed at hillslope scale one of affected catchments. High‐resolution imagery 2001, 2004 2009 was used to analyse changes loss. Spatial metrics, namely shape index (LSI), percentage (PLand) largest patch (LPI)...
ABSTRACT Fans, in association with hillslope gullies and badlands their impact on the catchment sediment cascade, slope‐channel connectivity local landscape evolution, have been reported diverse geomorphic environments. However, research development morphodynamics of gully fans is still its infancy South Africa. An investigation was undertaken mid‐slope discontinuous Eastern Cape Province Africa using field surveys source fingerprinting techniques to establish dynamics fan systems impacts...
There is evidence of climate shifts in Africa shown by changing rainfall patterns, temperatures and increased fire incidences. As such, the annual variability for 41 years (1970–2010) nine stations at Amakhala reserve, Grahamstown, Bathurst, Port Alfred, Uitenhage Elizabeth Eastern Cape, South was studied through trend time series analysis. In order to identify trends extreme events, daily index (DI), highest frequency dry wet spells were also analysed. Pearson's product moment correlation...
This article reports an assessment of the spatial and temporal loss wetlands to development projects (DPs) in Kampala–Mukono Corridor (KMC). Four sets satellite images (1974–2013), historical field data were used assess changes extent wetland land cover types. Through unsupervised classification, types DPs delineated future losses projected through IDRISI Selva-based Markov Chain model. The KMC have shrunk by almost a half (47%) since 1974, with accounting for 56% total loss. main drivers...
Abstract The impact of vegetation invasion on hillslope soil moisture dynamics was investigated by comparing three surface cover conditions. Soil variations under grass, bare areas and Pteronia incana , a patchy invader shrub, were monitored fortnightly between 01 November 2007 May 2008 in an experimental setup where high frequency ECH 2 O EC‐20 probes connected to 5‐channel Em50 datalogger calibrated installed the field. Grass had consistently readings during major rainfall episodes...