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Browsing by Author "Bugan, Richard DH"

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Alluvial aquifer characterisation and resource assessment of the Molototsi sand river, Limpopo, South Africa

Author: Walker, D ; Jovanovic, Nebojsa ; Bugan, Richard DH ; Abiye, T ; du Preez, D ; Parkin, G ; Gowing, J Date: Oct 2018 Study region: Molototsi sand river, Limpopo, South Africa. Study focus: Ephemeral sand rivers are common throughout the world’s dryland regions, often providing a water source where more conventional sources are unavailable. However, these ... Read more
Application of the rainfall infiltration breakthrough (RIB) model for groundwater recharge estimation in west coastal South Africa

Author: Sun, X ; Xu, Y ; Jovanovic, Nebojsa ; Kapangaziwiri, Evison ; Brendonck, L ; Bugan, Richard DH Date: Apr 2013 Recharge estimation in arid and semi-arid areas is very challenging. The chloride mass balance method applied in western South Africa fails to provide reliable recharge estimates near coastal areas. A relationship between rainfall events and ... Read more
Assessing water use by Prosopis invasions and Vachellia karroo trees: Implications for groundwater recovery following alien plant removal in an arid catchment in South Africa

Author: Dzikiti, Sebinasi ; Ntshidi, Zanele ; Le Maitre, David C ; Bugan, Richard DH ; Mazvimavi, D ; Schachtschneider, K ; Jovanovic, Nebojsa ; Pienaar, Harrison H Date: Aug 2017 Prosopis spp., (or Mesquite), is a desert adapted woody weed which has invaded large parts of arid and semi-arid regions. It has a characteristic deep tap root, and forms dense impenetrable thickets along river banks, flood plains, and seasonal ... Read more
Atlantis Water Supply Scheme (AWSS) artificial recharge scientific and operational support

Author: Jovanovic, Nebojsa ; Bugan, Richard DH ; Israel, S ; Petersen, C ; Genthe, Bettina ; Steyn, Maronel ; Tredoux, G ; Allpass, D ; Bishop, R ; Marinus, V ; Flower, P Date: Oct 2012 Since the 1970s, the town of Atlantis, on the dry west coast of South Africa, has relied on an innovative process whereby wastewater and stormwater is transferred underground to be stored in an aquifer for future use. To ensure the long-term ... Read more
Characterization and quantification of preferential flow in fractured rock systems, using resistivity tomography

Author: May, F ; Mikes, D ; Bugan, Richard DH ; Jovanovic, Nebojsa ; Rozanov, A Date: Nov 2010 In the use of unsaturated zone methods to estimate recharge, the basic assumption is made that recharge occurs by means of diffusive processes (i.e. piston flow occurs). In fractured environments the reliability of recharge estimate have been ... Read more
Comparative analysis of the PRMS and J2000 hydrological models applied to the Sandspruit Catchment, Western Cape, South Africa

Author: Bugan, Richard DH ; Jovanovic, Nebojsa ; De Clercq, WP ; Helmschrot, J ; Fluegel, WA ; Leavesley, GH Date: Dec 2009 The applicability of distributed hydrological models to the semi-arid conditions in the Western Cape was investigated through the application of PRMS and J2000 in the Sandspruit Catchment. The Sandspruit is an annual river, with the catchment ... Read more
Comparison of two remote sensing models for estimating evapotranspiration: algorithm evaluation and application in seasonally arid ecosystems in South Africa

Author: Dzikiti, Sebinasi ; Jovanovic, Nebojsa ; Bugan, Richard DH ; Ramoelo, Abel ; Majozi, Nobuhle P ; Nickless, Alecia ; Cho, Moses A ; Le Maitre, David C ; Ntshidi, Zanele ; Pienaar, Harrison H Date: Sep 2019 Remote sensing tools are becoming increasingly important for providing spatial information on water use by different ecosystems. Despite significant advances in remote sensing based evapotranspiration (ET) models in recent years, important ... Read more
Dryland salinity management in the semi-arid Western Cape (South Africa)

Author: Bugan, Richard DH ; Jovanovic, Nebojsa ; De Clercq, WP ; Flüge, W-A ; Helmschrot, J ; Fink, M ; Kralisch, S Date: Jul 2011 Dryland salinity is a major factor affecting the water quality of the mid-to-lower-reaches of the Berg River, a pivotal source of water to Cape Town. The implementation of salinity management strategies is therefore essential. Distributed ... Read more
Dryland salinity: threatening water resources in the semi-arid Western Cape

Author: Bugan, Richard DH ; De Clercq, W ; Jovanovic, Nebojsa Date: Nov 2010 Increased dryland salinity in the Swartland and Overberg regions poses a threat to the bread basket of the Western Cape, water resources in an already water-stressed area, water supply to the industrialised Saldanha region as well as the ... Read more
Dynamics of MODIS evapotranspiration in South Africa

Author: Jovanovic, Nebojsa ; Mu, Q ; Bugan, Richard DH ; Zhao, M Date: Jan 2015 This paper describes the dynamics of evapotranspiration (ET) in South Africa using MOD16 ET satellite-derived data, and analyses the inter-dependency of variables used in the ET algorithm of Mu et al. (2011). Annual evapotranspiration is ... Read more
Estimating evapotranspiration in a semi-arid catchment: A comparison of hydrological modelling and remote-sensing approaches

Author: García, CL ; Jovanovic, Nebojsa ; Teich, I ; Fink, M ; Dzikiti, Sebinasi ; Bugan, Richard DH Date: Apr 2020 Reliable spatial data of evapotranspiration (ET) in support of water resources management are limited. ET is a major component of the water balance, in many regions, and therefore it is critical that it be accurately quantified. To identify ... Read more
Four decades of water recycling in Atlantis (Western Cape, South Africa): Past, present and future

Author: Bugan, Richard DH ; Jovanovic, Nebojsa ; Israel, S ; Tredoux, G ; Genthe, Bettina ; Steyn, Maronel ; Allpass, D ; Bishop, R ; Marinus, V Date: Oct 2016 The primary aquifer at Atlantis (Western Cape, South Africa) is ideally suited for water supply and the indirect recycling of urban stormwater runoff and treated domestic wastewater for potable purposes. The relatively thin, sloping aquifer ... Read more
Groundwater recharge: Accurately representing evapotranspiration

Author: Bugan, Richard DH ; Jovanovic, Nebojsa ; May, F ; Dzikiti, Sebinasi Date: Sep 2011 Groundwater recharge is the basis for accurate estimation of groundwater resources, for determining the modes of water allocation and groundwater resource susceptibility to climate change. Accurate estimations of groundwater recharge with ... Read more
Guidelines for integrated catchments monitoring: ICM mind map development and demonstration

Author: Jovanovic, Nebojsa ; Israel, S ; Petersen, C ; Bugan, Richard DH ; Tredoux, G ; De Clerc, WP ; Rose, R ; Conrad, J ; Demlie, M Date: Sep 2011 Advances have been made in recent years in developing networks and databases for monitoring water systems in South Africa. However, these monitoring systems need to be consolidated and integrated amongst various components of catchment systems ... Read more
Hydrogeological modelling of the Atlantis aquifer for management support to the Atlantis water supply scheme

Author: Jovanovic, Nebojsa ; Bugan, Richard DH ; Tredoux, Gideon ; Israel, Sumaya ; Bishop, R ; Marinus, V Date: Jan 2017 The Atlantis Water Supply Scheme (AWSS, Western Cape, South Africa) has been in operation for about 40 years as a means to supply and augment drinking water to the town of Atlantis via managed aquifer recharge (MAR). In this study, the numerical ... Read more c b
The impacts of commercial plantation forests on groundwater recharge: A case study from George (Western Cape, South Africa)

Author: Tuswa, N ; Bugan, Richard DH ; Mapeto, T ; Jovanovic, Nebojsa ; Gush, Mark B ; Kapangaziwiri, Evison ; Dzikiti, Sebinasi ; Kanyerere, T ; Xu, Y Date: Aug 2019 The benefits of the commercial plantation forestry sector (income generation and job provision) come at considerable environmental costs, particularly the impact of the industry on water resources. Plantation forests exhibit higher ... Read more
Implementing contour bank farming practices into the J2000 model to improve hydrological and erosion modelling in semi-arid Western Cape Province of South Africa

Author: Steudel, T ; Bugan, Richard DH ; Kipka, H ; Pfennig, B ; Fink, M ; De Clercq, W ; Flügel, W-A ; Helmschrot, J Date: 2013 Contour bank farming is a well-known agricultural management technique in areas which are characterised by intensive and erosive rainfalls. Contour banks are designed to reduce the flow velocity of overland flow and to intercept water before ... Read more
Initial hydrological modelling to assess impacts of different land uses on process hydrology in a small-scale semi-arid catchment in the Western Cape Province, South Africa

Author: Steudel, T ; De Clercq, W ; Bugan, Richard DH ; Jovanovic, Nebojsa ; Hardy, M ; Scheibler, F ; Helmschrot, J Date: Jun 2010 The main objective of the presented study was to develop a hydrological model to simulate and assess impacts of different land use types on basin hydrology. Read more
Integrated catchment modelling in a Semi-arid area

Author: Bugan, Richard DH ; Jovanovic, Nebojsa Date: 01 Sep 2010 Water management in South Africa is increasingly being shifted towards the public domain as was intended by the National Water Act (1998). This means that water managers, managing Catchment Management Agencies (CMAs) or similar bodies, will ... Read more
Land use management: A dryland salinity mitigation measure (Western Cape, South Africa)

Author: Bugan, Richard DH ; Fink, M ; Jovanovic, Nebojsa ; De Clercq, WP ; Helmschrot, J ; Steudel, T ; Pfenning, B ; Fischer, C Date: Jun 2013 The aim of this study was to simulate the hydrology and salinity fluxes in the Sandspruit catchment with the JAMS/J2000 – NaCl semi-distributed hydrosalinity model and to Identify land use/management scenarios that would minimise the impacts ... Read more

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