Time to tap into water technology

The Theewaterskloof Dam near Villiersdorp. As we are obsessed with building dams, groundwater is a Cinderella resource, says the writer. Picture: Henk Kruger/ANA

The Theewaterskloof Dam near Villiersdorp. As we are obsessed with building dams, groundwater is a Cinderella resource, says the writer. Picture: Henk Kruger/ANA

Published Nov 22, 2017


We need to unlock more water resources and drive efficiency in our existing supplies to stimulate the economy and job growth.

As our climate is changing and the main input into our water resources - rainfall - becomes more variable in time and place, we need to adjust how we manage and value our water resources.

Water is a vital cog in our economy. The challenges we face are many. On the one side the custodians of our water resources are blamed for our water woes through poor planning, operation and maintenance.

On the other side, water users are blamed for excessive use.

South Africa’s per capita water use is one of the highest. The world average is 170 litres a day, compared to our average of 235 litres, and in some metropolitan areas it can reach 600 litres a day.

We have rural communities that still do not have adequate access to water - some below 50 litres a day.

There is a need to radically change how we supply and use water. As our water demands grow we should do things differently while tackling our challenges head-on.

Access to water is a key requirement to grow the economy at all levels. Three barriers to economic growth are recognised by economists - improper infrastructural investment, skills and education development and public service delivery.

The traditional and established means of water supply worked well when only a small population was served. It is increasingly difficult to serve scattered communities owing to challenges in settlement densities and topography.

The way we manage our water resources also needs radical transformation. Post-1994, we have achieved a great deal in getting people connected to water infrastructure. 

However, the question remains: Are these connections supplied with water all the time? Did we only add up how many water supply points we have installed?

We have reported for the Millennium Development Goals 88.3% safe water access. Did we also subtract the failed or unsustainable systems? Basic domestic water supply remains a challenge.

Consider what are called the “Priority District Municipalities” that are dysfunctional - these municipalities sit on top of our higher exploitable groundwater resources areas. 

Yet the resource is ignored in the main or poorly managed. Because we are obsessed with building dams, groundwater can be

considered the Cinderella resource. What are some of the root causes?

First, groundwater is an invisible resource to the layperson. It is difficult to determine its volumes as opposed to a dam. This leads to a perception problem about its assurance of yield - it needs to be developed and managed by skilled personnel.

Secondly, it has a lower capital expenditure cost compared to dams, but a higher long-term operational cost. It seems our financial systems cannot deal with this, and most favoured projects are those with higher capital expenditure over a shorter period. 

In addition, the financial burden is on the municipality for local water schemes and they tend to prefer receiving piped water from another water service provider to externalise planning and logistics.

Thirdly, the distribution infrastructure and abstraction systems need to be operated, maintained and managed, in addition to how the aquifers respond to the abstraction - no easy task.

Lastly, there are institutional biases to dams and now desalinisation plants.

At local municipality level, where groundwater is a conjunctive or sole source of supply, management is poor or absent.

A Water Research Commission study recently surveyed 24 municipalities that use groundwater as a domestic supply source, and 71% of them do not have a groundwater management plan, while 17% do not know if they have a plan. Only 13% have plans.

This is also reflected in the lack of specialised groundwater personnel in the employ of the municipalities - 79% do not have the required skills to manage their groundwater supply schemes. 

This is a recipe

for disaster and points to poor governance. When a groundwater scheme fails, the tendency is to blame the resource as unreliable, while the real reason is poor management and institutional arrangements.

The myth that groundwater is always cheap to manage, available in exploitable quantities all over the place, always potable and free, are some of the factors that create the perception that it needs limited management.

Groundwater is but one example of how we do not use available resources to meet our increasing demands. By including this under-utilised resource in our water supply mix with other water sources, like direct wastewater reuse, rain and storm water harvesting, we can improve our water security.

At the same time, we need to overhaul our deteriorating water infrastructure. The Water Research Commission estimated that our non-revenue water loss amounts to around R7 billion and a large part is because of leaking infrastructure. The war-on-leaks programme and artisan training programmes are a step in the right direction.

On the demand side, we need to radically change our approaches to water use across all sectors. We need to upscale sanitation technologies that use no or significantly less water to flush our toilets.

The Water Research Commission has prototype toilets that can be flushed with less than one litre of water. Yes, you read that correctly!

The way we design our buildings and cities needs to radically change to become water and energy efficient.

Imagine the manufacturing opportunities, if we need to retro-fit cities and create new industries that supply water-wise technologies. This needs to be supported by an increase in R&D spending. Our declining manufacturing sector needs this push.

The net benefit will be to the economy; water innovations and technologies can contribute to get us out of this “growth trap” we find ourselves in.

South Africa’s water economy can reduce the high levels of unemployment, poverty, and inequality. Water- and sanitation-wise manufacturing is a great way to achieve this. 

Inefficient use and management of our water resources hampers

our growth efforts, and water needs to be better valued as a major

direct and indirect contributor

to GDP.

Dr Adams is executive manager at the Water Research Commission

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