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Browsing by Author "Dzikiti, Sebinasi"

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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
Characterising the water use and hydraulic properties of riparian tree invasions: A case study of Populus canescens in South Africa

Author: Ntshidi, Zanele ; Gush, Mark B ; Dzikiti, Sebinasi ; Le Maitre, David C Date: Apr 2018 Invasive alien plants (IAPs) pose a serious threat to the already limited water resources in dry countries like South Africa which are facing increasing water shortages. Much of South Africa is expected to get drier in future due to climate ... Read more
A comparative assessment of water use by Acacia longifolia invasions occurring on hillslopes and riparian zones in the Cape Agulhas region of South Africa

Author: Mkunyana, YP ; Mazvimavi, D ; Dzikiti, Sebinasi ; Ntshidi, Zanele Date: Oct 2018 The detrimental impacts of invasive alien plants on ecosystems and water resources have raised concerns in arid and semi-arid countries like South Africa where the average precipitation is approximately 500 mm/yr, which is below the world ... 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
Comparison of water-use by alien invasive pine trees growing in riparian and non-riparian zones in the Western Cape Province, South Africa

Author: Dzikiti, Sebinasi ; Schachtschneider, K ; Naiken, V ; Gush, Mark B ; Le Maitre, David C Date: Apr 2013 Self-established stands of alien invasive pine trees are common in many parts of South Africa and elsewhere. They mainly invade non-riparian settings but sometimes invade riparian habitats. There are clear visual differences in the physical ... Read more
Contrasting water use patterns of two drought adapted native fruit tree species growing on nutrient poor sandy soils in northern KwaZulu-Natal

Author: Dzikiti, Sebinasi ; Ntuli, NR ; Nkosi, NN ; Ntshidi, Zanele ; Ncapai, L ; Gush, MB ; Mostert, THC ; Du Preez, R ; Mobea, NT ; Mpandeli, S ; Pienaar, Harrison H Date: Jul 2022 Natural forests are an important source of livelihood for various communities. Yet economically important fruit tree species endemic to sub Saharan Africa e.g. Sclerocaryea birrea (Marula) are critically endangered due to over-exploitation ... Read more
Effect of supplementary irrigation at high ambient temperatures on sunburn, plant physiology, soil and canopy environment of ‘Granny Smith’ apple

Author: Mupambi, G ; Schmeisser, M ; Lötze, E ; Malan, C ; Dzikiti, Sebinasi ; Steyn, WJ Date: Jan 2017 Pulsing irrigation is a supplementary irrigation strategy whereby South African apple growers aim to reduce tree stress during a heat wave by applying additional water to the orchard floor using microsprinklers. The aim of this research was ... Read more
Estimating crop coefficients for apple orchards with varying canopy cover using measured data from twelve orchards in the Western Cape Province, South Africa

Author: Mobe, Nompumelelo T ; Dzikiti, Sebinasi ; Zirebwa, SF ; Midgley, SJF ; Von Loeper, W ; Mazvimavi, D ; Ntshidi, Zanele ; Jovanovic, Nebojsa Date: Apr 2020 The FAO-56 crop coefficient (Kc) approach is widely used for making irrigation decisions. Allen and Pereira (2009) extended this approach by developing a method for estimating Kc using a density coefficient (Kd), which is estimated from the ... 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
Estimating the water requirements of high yielding and young apple orchards in the winter rainfall areas of South Africa using a dual source evapotranspiration model

Author: Dzikiti, Sebinasi ; Volschenk, T ; Midgley, SJ ; Lötze, E ; Taylor, NJ ; Gush, Mark B ; Ntshidi, Zanele ; Zirebwa, SF ; Schmeisser, M ; Jarmain, C ; Steyn, WJ ; Pienaar, Harrison H Date: Jun 2018 Exceptionally high yielding (> 100 t ha-(sup1)) apple orchards (Malus domestica Borkh.) are becoming common in South Africa and elsewhere in the world. However, no accurate quantitative information currently exists on the water requirements ... Read more
Field quantification of the water footprint of an apple orchard, and extrapolation to watershed scale within a winter rainfall Mediterranean climate zone

Author: Gush, Mark B ; Dzikiti, Sebinasi ; Van der Laan, M ; Steyn, Maronel ; Manamathela, S ; Pienaar, Harrison H Date: Jun 2019 Field scale quantifications of the water footprints (WF) of crops, based on actual measurements, provide valuable and detailed information for on-farm water use management. However, watershed-based WF assessments are more appropriate for ... 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
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
Impacts of invading alien plant species on water flows at stand and catchment scales

Author: Le Maitre, David C ; Gush, Mark B ; Dzikiti, Sebinasi Date: May 2015 There have been many studies of the diverse impacts of invasions by alien plants but few have assessed impacts on water resources. We reviewed the information on the impacts of invasions on surface runoff and groundwater resources at stand ... Read more
Impacts of plant invasions on terrestrial water flows in South Africa

Author: Le Maitre, David C ; Blignaut, JN ; Clulow, A ; Dzikiti, Sebinasi ; Everson, CS ; Gorgens, AHM ; Gush, Mark B Date: 2020 Considerable advances have been made since the first estimates of the impacts of invasive alien plants on water resources in the early 1990s. A large body of evidence shows that invasive alien plants can increase transpiration and evaporation ... Read more
Implementation of groundwater protection measures, particularly resource-directed measures in South Africa: a review paper

Author: Pienaar, Harrison H ; Xu, Y ; Braune, E ; Cao, J ; Dzikiti, Sebinasi ; Jovanovic, NZ Date: Aug 2021 This review paper on groundwater protection measures in South Africa focuses on the actual implementation of groundwater protection measures, in particular, the resource-directed measures (RDM) as described in Chapter 3 of the National Water ... Read more
Ineffectiveness of foliar S-ABA application as an apple sunburn suppressant explained through effects on peel biochemistry and leaf ecophysiology

Author: Mupambi, G ; Schmeisser, M ; Dzikiti, Sebinasi ; Reynolds, S ; Steyn, WJ Date: Feb 2018 Sunburn is a physiological disorder that affects the visual quality of apple (Malus Domestica) fruit. In South Africa, producers estimate yield losses of up to 50% in green cultivars due to sunburn damage. Recent research in Japan has found ... Read more
An integrated approach for the estimation of crop water requirements based on soil, plant and atmospheric measurements

Author: Jovanovic, Nebojsa ; Dzikiti, Sebinasi ; Gush, Mark B Date: Jul 2018 In this chapter, we argue that an integrated approach for estimating crop water requirements is required to account for atmospheric conditions, plant water status and soil properties. The chapter first reviews the concepts, principles, limits ... Read more
Measurement and modelling of evapotranspiration in three fynbos vegetation types

Author: Dzikiti, Sebinasi ; Jovanovic, Nebojsa ; Bugan, Richard DH ; Israel, S ; Le Maitre, David C Date: Apr 2014 Many studies have investigated the water relations of indigenous plants in the fynbos shrublands of the Cape, South Africa. These have mainly focused on understanding the mechanisms by which individual plant species respond to droughts, the ... Read more
Measuring and modelling the water use of fruit tree orchards in the Western Cape province of South Africa

Author: Gush, Mark B ; Dzikiti, Sebinasi ; Naiken, V Date: Oct 2012 This project investigated the water use of irrigated fruit tree orchards as a means of facilitating more efficient and productive water use within the sector and reducing operating costs. Read more

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