Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-1361
Title: The environmental mitigation potential of photovoltaic-powered irrigation in the production of South African maize
Authors : Wettstein, Sarah
Muir Wendel, Karen
Scharfy, Deborah
Stucki, Matthias
Published in : Sustainability
Volume(Issue) : 9
Issue : 1772
Issue Date: 30-Sep-2017
Language : Englisch / English
Subjects : Photovoltaic; Greenhouse gas emissions; Crop production; Life-cycle assessment; Maize; Corn; LCA
Subject (DDC) : 333.7: Landflächen, Erholungsgebiete, Energie
Abstract: Agriculture is under pressure to reduce its environmental impact. The use of renewable energy sources has potential to decrease these impacts. Maize is one of the most significant crops in South Africa and approximately 241,000 hectares are irrigated. This irrigation is most commonly powered by grid electricity generated using coal. However, South Africa has high solar irradiation, which could be used to generate photovoltaic electricity. The aim of this study was to determine the environmental mitigation potential of replacing grid-powered irrigation in South African maize production with photovoltaic irrigation systems using Life Cycle Assessment. The study included the value chain of maize production from cultivation to storage. Replacing grid electricity with photovoltaic-generated electricity leads to a 34% reduction in the global warming potential of maize produced under irrigation, and—applied at a national level—could potentially reduce South Africa’s greenhouse gas emissions by 536,000 t CO2-eq. per year. Non-renewable energy demand, freshwater eutrophication, acidification, and particulate matter emissions are also significantly lowered. Replacing grid electricity with renewable energy in irrigation has been shown to be an effective means of reducing the environmental impacts associated with South African maize production.
Departement: Life Sciences und Facility Management
Organisational Unit: Institut für Umwelt und Natürliche Ressourcen (IUNR)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
DOI : 10.21256/zhaw-1361
10.3390/su9101772
ISSN: 2071-1050
URI: https://digitalcollection.zhaw.ch/handle/11475/1406
Appears in Collections:Publikationen Life Sciences und Facility Management

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