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Opinion: KZN floods expose significant socio-economic and environmental vulnerabilities

20 April 2022 | Story Dr Olivia Kunguma | Photo Supplied

Opinion article by Dr Olivia Kunguma, Disaster Management Training and Education Centre for Africa, University of the Free State.

For more than four days, the eastern side of South Africa experienced devastating heavy rainfall, with KwaZulu-Natal (KZN) being hit the hardest. The persistent rains triggered flooding and mudslides. Several compounding impacts of the flooding and mudslides were recorded. The impact includes, but is not limited to, the death of more than 440 people; damage to infrastructure (telecommunication towers, roads, bridges, homes, power lines, etc.); car accidents; business and school closures; and missing people. Most disasters or incidents entail a potentially compounding process where one event leads to another. The stated hazards and impacts also led to a rise in desperate and disgruntled citizens who started protesting and looting. The civil unrest is attributed to the lack of services, such as access to water and electricity.

An incident of this magnitude requires the intervention of disaster management services, whose primary role is to coordinate relevant stakeholders to respond to the situation (Kunguma, 2022). The South African Disaster Management Act, 57 of 2002 (DMA) (as amended, Act 16 of 2015) (Republic of South Africa, 2002), used to manage and coordinate disaster management, mandates the disaster management centres to perform certain functions. One important function to note is the continuous coordination of multiple sectors and disciplines by planning and implementing measures aimed at risk reduction, rapid response, and post-disaster recovery and rehabilitation.

The DMA is also used to declare certain incidents as disasters. Disasters can be declared in local, provincial, or national spheres of government. Since the flooding mostly affected KZN, there were appeals to declare the event a provincial disaster. The KZN Premier and the Minister of Cooperative Governance (CoGTA) and Traditional Affairs announced at press conferences (eNCA, 2022) that the event would be declared a disaster. The flooding and mudslides were classified as disastrous according to Section 23 of the DMA. This section prescribes that the National Disaster Management Centre must determine whether the event should be regarded as a disaster in terms of the DMA. The NDMC assesses the magnitude and severity of the event and then classify it as a local, provincial, or national disaster. On 13 April, Dr Mmaphaka Tau, the Head of the National Disaster Management Centre, declared the KZN floods a provincial disaster (CoGTA, 2022). A provincial disaster means that the event has affected more than one municipality, enabling the province to deal with the event effectively.

The declaration of a disaster means that

• available resources such as facilities, vehicles, and funding are released;

• personnel of the state organ are released to render emergency services;

• the affected population is evacuated to temporary shelters;

• movement is regulated;

• information is disseminated;

• temporary lines of communication are maintained or installed; and

• alcohol is suspended or limited in disaster-stricken areas.

Important to note is that the DMA does not apply to an incident that can be dealt with effectively in terms of contingency arrangements or other legislation that can address the consequences of the risk.

Flood relief efforts

The multidisciplinary and multisectoral nature of disaster management has led to several political stakeholders visiting the affected areas to assess the flooding in KZN. This included visits from the Mayor, Premier, Minister of Police, CoGTA Minister, and the President of South Africa. All the disaster management centres in the province have been activated to attend to the disaster. The emergency numbers of the centres were published on Twitter by the Presidency (PresidencyZA, 2022) and other government departments. The centres’ efforts include, but are not limited to, coordinating response; observing and monitoring weather information issued by authorities; disseminating early warning; issuing relief supplies such as blankets; continuing to assess the damage; evacuating the affected to places of safety (for example, all the community halls have been opened for shelter); and clearing up the damage. Stakeholders such as the South African Police Service (SAPS), Gift of the Givers, the South African Social Security Agency (SASSA), and the South African National Defence Force (SANDF) were coordinated by CoGTA (Disaster Management) to provide their services. At this point, the distribution of relief should be based on vulnerability assessments, with no political interference.

Determining the root causes

The South African Weather Service (SAWS) predicted the expected heavy rainfall in time. The GFS weather forecast model of the United States of America has also predicted severe rainfall along the KZN coast since last week. There was a severe cut-off low system, a common kind of weather system that does not occur regularly but can occur often. In a cut-off low system, the low pressure causes air to rise, and when it does, it reaches a condensation level that forms clouds. When the cut-off low system came down along the coast, another system developed at a high altitude and combined with it, making it more intense. What was unusual, was that the cut-off low became stationary or ‘stalled’ over the KZN coast. Later, the cut-off low started turning more to the southeast. The cut-off low was then reclassified as a tropical cyclone or subtropical depression, named ‘ISSA’.

In addition, the lack of infrastructure development in the coastal area could also be the cause of the flooding and mudslides. For example, the Isipingo River (Map of Isipingo River, 2022) was channelised with concrete embankments and confined in a narrow space, crossing the N2 in two places, without proper planning of water levees when building the N2 highway. When the river is flooded, the road would turn into a river. This kind of flooding also happened in 2019, so one would have expected the local government to have addressed this matter and that they would have done something about it. The water spills onto the road, as previous heavy seas have blocked the mouth of the river, and only a strong momentum of the river flow can break through the built-up sand.

The flooding in residential areas such as Kloof and Hillcrest is due to the development of complexes that take up the natural land space where grass or trees would have allowed the water to penetrate the topsoil easily. In complexes, more than 50% of the area is covered with pavements and solid roofs that concentrate the run-off water, which drains into a channel not designed for that amount of water. The sudden fast-flowing water then quickly erodes the soil. Many places on the sides of the roads have concrete embankments, while other parts in between are without embankments. These open parts are where the water broke through, and landslides occurred on the various roads. These damages can also be attributed to developments on the top of the hills. “The town planners should not permit new complexes covering 70% of the area without considering redevelopment of water run-off and drainage management,” said Prof Sue Walker, an agricultural meteorologist at the University of the Free State, and a principal researcher at the Agricultural Research Council.

Ms Nonala Ndlovu, the KZN CoGTA spokesperson, shared with eNCA News the possible causes of the flooding. The flooding is attributed to the poor drainage systems, exacerbated by littering in the communities. She, however, indicated that the non-stop rain was unprecedented and that even if the drainage systems were well serviced, it would still not be able to handle the high volume of water. She added that buildings in low-lying areas could not handle the influx of water (eNCA, 2022).

Flood recovery and future prevention

Investment in disaster risk reduction (DRR) efforts is needed more than disaster response efforts. Although the occurrence of heavy rain was predicted in time, the damage it caused showed that this timely prediction was ineffectual. Systematic approaches are needed to prepare for, prevent, and mitigate the frequency or severity of losses and damage caused by flooding. Surely, attention needs to be paid to research-informed town planning, building codes, land zoning, public awareness, flood legislation, and flood early warning systems, to name a few.

Since disaster management has shown that it plays a leading and active role in responding to disasters, it also needs to play a leading role in reducing the risks. The KZN floods have exposed significant socio-economic and environmental vulnerabilities that require immediate attention if effective risk reduction is to be achieved.

• UFS-DIMTEC is requesting donations of non-food items for the victims of the the KZN flood disaster. To donate, please contact Dr Tlou Raphela on +27 72 108 4987 or RaphelaTD@ufs.ac.za

News Archive

Inaugural lecture: Prof Robert Bragg, Dept. of Microbial, Biochemical and Food Biotechnology

2006-05-17

Attending the inaugural lecture were in front from the left Prof Robert Bragg (lecturer at the Department of Microbial, Biochemical and Food Biotechnology) and Frederick Fourie (Rector and Vice-Chancellor). At the back from the left were Prof James du Preez (Departmental Chairperson: Department of Microbial, Biochemical and Food Biotechnology) and Prof Herman van Schalkwyk (Dean: Faculty of Natural and Agricultural Sciences). Photo: Stephen Collett

A summary of an inaugural lecture delivered by Prof Robert Bragg at the University of the Free State:

CONTROL OF INFECTIOUS AVIAN DISEASES – LESSONS FOR MAN?

Prof Robert R Bragg
Department of Microbial, Biochemical and Food Biotechnology
University of the Free State

“Many of the lessons learnt in disease control in poultry will have application on human medicine,” said Prof Robert Bragg, lecturer at the University of the Free State’s (UFS) Department of Microbial, Biochemical and Food Biotechnology during his inaugural lecture.

Prof Bragg said the development of vaccines remains the main stay of disease control in humans as well as in avian species. Disease control can not rely on vaccination alone and other disease-control options must be examined.

“With the increasing problems of antibiotic resistance, the use of disinfection and bio security are becoming more important,” he said.

“Avian influenza (AI) is an example of a disease which can spread from birds to humans. Hopefully this virus will not develop human to human transmission,” said Prof Bragg.

According to Prof Bragg, South Africa is not on the migration route of water birds, which are the main transmitters of AI. “This makes South Africa one of the countries less likely to get the disease,” he said.

If the AI virus does develop human to human transmission, it could make the 1918 flu pandemic pale into insignificance. During the 1918 flu pandemic, the virus had a mortality rate of only 3%, yet more than 50 million people died.

Although the AI virus has not developed human-to-human transmission, all human cases have been related to direct contact with infected birds. The mortality rate in humans who have contracted this virus is 67%.

“Apart from the obvious fears for the human population, this virus is a very serious poultry pathogen and can cause 100% mortality in poultry populations. Poultry meat and egg production is the staple protein source in most countries around the world. The virus is currently devastating the poultry industry world-wide,” said Prof Bragg.

Prof Bragg’s research activities on avian diseases started off with the investigation of diseases in poultry. “The average life cycle of a broiler chicken is 42 days. After this short time, they are slaughtered. As a result of the short generation time in poultry, one can observe changes in microbial populations as a result of the use of vaccines, antibiotics and disinfectants,” said Prof Bragg.

“Much of my research effort has been directed towards the control of infectious coryza in layers, which is caused by the bacterium Avibacterium paragallinarum. This disease is a type of sinusitis in the layer chickens and can cause a drop in egg product of up to 40%,” said Prof Bragg.

The vaccines used around the world in an attempt to control this disease are all inactivated vaccines. One of the most important points is the selection of the correct strains of the bacterium to use in the vaccine.

Prof Bragg established that in South Africa, there are four different serovars of the bacterium and one of these, the serovar C-3 strain, was believed to be unique to Southern Africa. He also recently discovered this serovar for the first time in Israel, thus indicating that this serovar might have a wider distribution than originally believed.

Vaccines used in this country did not contain this serovar. Prof Bragg established that the long term use of vaccines not containing the local South African strain resulted in a shift in the population distribution of the pathogen.

Prof Bragg’s research activities also include disease control in parrots and pigeons. “One of the main research projects in my group is on the disease in parrots caused by the circovirus Beak and Feather Disease virus. This virus causes serious problems in the parrot breeding industry in this country. This virus is also threatening the highly endangered and endemic Cape Parrot,” said Prof Bragg.

Prof Bragg’s research group is currently working on the development of a DNA vaccine which will assist in the control of the disease, not only in the parrot breeding industry, but also to help the highly endangered Cape Parrot in its battle for survival.

“Not all of our research efforts are directed towards infectious coryza or the Beak and Feather Disease virus. One of my Masters students is currently investigating the cell receptors involved in the binding of Newcastle Disease virus to cancerous cells and normal cells of humans. This work will also eventually lead to a possible treatment of cancer in humans and will assist with the development of a recombinant vaccine for Newcastle disease virus,” said Prof Bragg.

We are also currently investigating an “unknown” virus which causes disease problems in poultry in the Western Cape,” said Prof Bragg.

“Although disinfection has been extensively used in the poultry industry, it has only been done at the pre-placement stage. In other words, disinfectants are used before the birds are placed into the house. Once the birds are placed, all use of disinfectants stops,” said Prof Bragg.

“Disinfection and bio security can be seen as the ‘Cinderella’ of disease control in poultry. This is also true for human medicine. One just has to look at the high numbers of people who die from hospital-acquired infections to realise that disinfection is not a concept which is really clear in human health care,” said Prof Bragg.

Much research has been done in the control of diseases through vaccination and through the use of antibiotics. “These pillars of disease control are, however, starting to crumble and more effort is needed on disinfection and bio security,” said Prof Bragg.

Prof Bragg has been working in close co-operation with a chemical manufacturing company in Stellenbosch to develop a unique disinfectant which his highly effective yet not toxic to the birds.

As a result of this unique product, he has developed the continual disinfection program for use in poultry. In this program the disinfectant is used throughout the production cycle of the birds. It is also used to ensure that there is excellent pre-placement disinfection.

“The program is extensively used for the control of infectious diseases in the parrot-breeding industry in South Africa and the product has been registered in 15 countries around the world with registration in the USA in the final process,” said Prof Bragg.

“Although the problem of plasmid mediated resistance to disinfectants is starting to rear its ugly head, this has allowed for the opening of a new research field which my group will hopefully exploit in the near future,” he said.

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