Okavango Research Institute (ORI): Recent submissions
Now showing items 241-260 of 262
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Access to water in gazetted and ungazetted rural settlements in Ngamiland, Botswana
(Elsevier, www.elsevier.com/locate/pce, 2006)Lack of access to safe or improved water supply in developing countries is a major global concern, since water is a basic need for sustenance. Programmes aimed at improving access to safe water have been implemented in ... -
The challenges of supplying water to small, scattered communities in the Lower Okavango Basin (LOB), Ngamiland, Botswana: An evaluation of government policy and performance
(Elsevier, www.elsevier.com/locate/pce, 2007)Supplying adequate water and sanitation facilities to small, scattered rural communities and/or large, fast growing settlements in remote areas is a challenge not easily met anywhere in the world. This article focuses on ... -
Simulation of DOM fluxes in a seasonal floodplain of the Okavango Delta, Botswana
(Elsevier, www.elsevier.com/locate/ecolmodel, 2007)In order to examine dissolved organic matter (DOM) fluxes in seasonal wetland systems that expand and contract seasonally, a time-variable model of dissolved organic carbon (DOC) was developed for a seasonal floodplain ... -
Fire and its influence on microbial community structure and soil biochemical properties in the Okavango Delta, Botswana
(Academic Journals. http://www.academicjournals.org/SRE, 2007)The influence of wild fires on microbial community structure, soil organic matter, sulphur oxidising and nitrifying microbial populations in the floodplains of the Okavango Delta of Botswana was assessed. Microbial ... -
Origin and palaeo-environments of calcareous sediments' in the Moshaweng dry valley, Southeast Botswana
(John Wiley & Sons, Ltd. http://www3.interscience.wiley.com/journal/117935722/grouphome/home.html, 2002)Quaternary sedimentation in the Moshaweng dry valley of southeastern Botswana is evaluated on the basis of geomorphological evolution and sedimentological analyses. Stratigraphic evidence reveals an 'upper surface (1095 ... -
Flooding and its influence on diazotroph populations and soil nitrogen levels in the Okavango Delta
(South African Journal of Botany http://www.elsevier.com/wps/find/journaldescription.cws_home/707238/description#description, 2004)Effects of flooding on soil nitrogen (N), and asymbiotic nitrogen fixing bacterial (diazotroph) populations of the Okavango Delta were investigated. Diazotrophs from the rhizosphere of dominant annual and perennial grasses ... -
Influence of seasonal flooding on soil total nitrogen, organic phosphorus and microbial populations in the Okavango Delta, Botswana
(Journal of Arid Environments. http://www.elsevier.com/wps/find/journaldescription.cws_home/622855/description#description, 2003)The effect of flooding on soil total nitrogen, phosphorus and microbial population in different vegetation zones (floodplain, island and woodland) and profile depth (0?1, 0?5, 2?0, 3?0, 4?0 and 5?0m) of the Okavango ... -
The Effects of Soil Cover on Soil Respiration and Microbial Population in the Mopane (Colophospermum mopane) Woodland of North Western Botswana
(Global Science Books http://www.globalsciencebooks.com/index.php?page=shop.product_details&category_id=1&flypage=shop.flypage&product_id=5&option=com_virtuemart&Itemid=56&vmcchk=1&Itemid=56, 2008)Soil cover influences soil biological and chemical processes in various ways. The effects of soil cover (bare soil without litter, litter cover, Mopane tree canopy and grass cover) on soil respiration and microbial ... -
Vegetation cover trends along the Botswana Kalahari transect
(Elsevier; www.elsevier.com/locate/jaridenv, 2003)Vegetative response aspects of climate change studies include the determination of vegetation cover changes across climatic gradients. Vegetation characteristics and soil moisture measurements were obtained from four ... -
Use of remotely sensed data in the analysis of soil-vegetation changes along a drying gradient peripheral to the Okavango Delta, Botswana
(Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, 2005-10-10)This work determines the value of remotely sensed imagery in developing drying impacts which occur as a result of internal and/or external factors in the Okavango catchment. Three sites provide a preview of the consequences ... -
Use of image processing and GIS techniques to determine the extent and possible causes of land management/fenceline induced degradation problems in the Okavango area, northern Botswana
(Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, 1997)Attention worldwide has been focused on the need to assess the appropriateness of land management strategies especially where these occur near sensitive areas of wildlife habitat. This work considers the use of mainly ... -
HIV/AIDS and access to water: a study of home-based care in Ngamiland, Botswana
(Elsevier Ltd; www.elsevier.com/locate/pce, 2006)This case study investigates access to potable water in HIV/AIDS related home-based care households in five rural communities in Ngamiland, Botswana. Primary data collected from five villages, consisted of two parts. The ... -
Results from the EO-1 experiment - A comparative study of Earth Observing-1 Advanced Land Imager (ALI) and Landsat ETM+ data for land cover mapping in the Okavango Delta, Botswana
(Taylor & Francis; http://www.tandf.co.uk/journals/titles/01431161.asp, 2005-10)The Earth Observing-1 (EO-1) satellite acquired a sequence of data in 2001 and 2002 that highlighted the annual flooding of the lower Okavango Delta. The data were collected as part of the calibration/validation programme ... -
Indicators of desiccation-driven change in the distal Okavango Delta, Botswana
(Elsevier Ltd; www.elsevier.com/locate/jaridenv, 2007-01)This work seeks to determine whether riparian woody plant variables respond to drying and salinity regimes in the semi-arid distal Okavango Delta, northern Botswana. Structural and compositional variables were obtained ... -
The Success and Sustainability of Community-Based Natural Resource Management in the Okavango Delta, Botswana
(Society of South African Geographers; http://www.journals.co.za/ej/ejour_sageo.html, 2004)This paper assesses the success and sustainability of Community-Based Natural Resource Management (CBNRM) in the Okavango Delta. It does so by asking the following questions: a) to what extent has CBNRM contributed to ... -
The Okavango; a river supporting its people, environment and economic development
(Elsevier; www.elsevier.com/locate/jhydrol, 2006)The Okavango basin comprises the Cuito and Cubango active catchment areas in Angola, in addition to the Kavango's Okavango non-active catchment in northern Namibia and Botswana. The Okavango River water and its ecosystem ... -
Cryptic indicators of provenance from the geochemistry of the Okavango Delta sediments, Botswana
(Elsevier; http://www.elsevier.com/wps/find/journaldescription.cws_home/503361/description#description, 2005)[Please note that chemical formulae do not display properly]:The siliciclastic sediments of the Okavango inland Delta of northwest Botswana have a modal composition of quartz arenites and result from a complex history, ... -
Use of the geochemical and biological sedimentary record in establishing palaeo-environments and climate change in the Lake Ngami basin, NW Botswana
(Elsevier; http://www.elsevier.com/wps/find/journaldescription.cws_home/865/description#description, 2007-02-07)[Please note chemical formulae do not display correctly in this abstract]. Sediment samples from a continuous 4.6m profile in the dry bed of Lake Ngami in NW Botswana were analysed for geochemistry and dated using both 14C ... -
Fire activity on drylands and floodplains in the southern Okavango Delta, Botswana
(Elsevier; http://www.elsevier.com/wps/find/journaldescription.cws_home/622855/description#description, 2006-05-08)Satellite imagery derived fire history data for the southern Okavango Delta, Botswana from 1989 to 2003 were used to analyse the temporal and spatial distribution of fires and to assess changes in fire activity. Maximum ... -
Characterization of arsenic occurrence in the water and sediments of the Okavango Delta, NW Botswana
(Elsevier Science B.V. Amsterdam; http://www.elsevier.com/wps/find/journaldescription.cws_home/768/description#description, 2006)Detailed chemical analyses were performed on surface water, groundwater and sediment samples collected from the Okavango Delta between February and November 2003 in order to examine the distribution and geochemistry ...