Analysis of drought progression physiognomies in South Africa

Show simple item record Botai, Joel Ongego Botai, Christina M. De Wit, Jaco P. Muthoni, Masinde Adeola, Abiodun Morakinyo 2019-06-14T10:45:29Z 2019-06-14T10:45:29Z 2019-02-11
dc.description This study was carried out as part of the program of action spelt in the joint research collaboration between the South African Weather Service and the Central University of Technology, Free State, South Africa. en_ZA
dc.description.abstract The spatial-temporal variability of drought characteristics and propagation mechanisms in the hydrological cycle is a pertinent topic to policymakers and to the diverse scientific community. This study reports on the analysis of drought characteristics and propagation patterns in the hydrological cycle over South Africa. In particular, the analysis considered daily precipitation and streamflow data spanning from 1985 to 2016, recorded from 74 weather stations, distributed across South Africa and covering the country’s 19 Water Management Areas (WMAs). The results show that all the WMAs experience drought features characterized by an inherent spatial-temporal dependence structure with transition periods categorized into short (1–3 months), intermediate (4–6 months), long (7–12 months) and extended (>12 months) time-scales. Coupled with climate and catchment characteristics, the drought propagation characteristics delineate the WMAs into homogenous zones subtly akin to the broader climatic zones of South Africa, i.e., Savanna, Grassland, Karoo, Fynbos, Forest, and Desert climates. We posit that drought evolution results emanating from the current study provide a new perspective of drought characterization with practical use for the design of drought monitoring, as well as early warning systems for drought hazard preparedness and effective water resources planning and management. Overall, the analysis of drought evolution in South Africa is expected to stimulate advanced drought research topics, including the elusive drought termination typology. en_ZA
dc.description.department Geography, Geoinformatics and Meteorology en_ZA
dc.description.department School of Health Systems and Public Health (SHSPH) en_ZA
dc.description.librarian am2019 en_ZA
dc.description.sponsorship This research was partly funded by the Water Research Commission project, grant number [K5/2309]. en_ZA
dc.description.uri en_ZA
dc.identifier.citation Botai, J.O., Botai, C.M., De Wit, J.P. et al. 2019, 'Analysis of drought progression physiognomies in South Africa', Water (Switzerland), vol. 11, no. 2, art. 299, pp. 1-21. en_ZA
dc.identifier.issn 2073-4441 (online)
dc.identifier.other 10.3390/w11020299
dc.language.iso en en_ZA
dc.publisher MDPI Publishing en_ZA
dc.rights © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. en_ZA
dc.subject Drought propagation physiognomies en_ZA
dc.subject Hydrological drought en_ZA
dc.subject Clustering en_ZA
dc.subject Drought termination en_ZA
dc.subject Water resources planning en_ZA
dc.subject Water resources management en_ZA
dc.subject Propagation mechanism en_ZA
dc.subject Propagation characteristics en_ZA
dc.subject Early warning system en_ZA
dc.subject Drought characteristics en_ZA
dc.subject Catchments en_ZA
dc.title Analysis of drought progression physiognomies in South Africa en_ZA
dc.type Article en_ZA

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