Poor planning, illegal settlements
Like in many parts of the country, perennial water shortages in Harare are endemic. Harare and other outlying areas such as Chitungwiza, Norton, Ruwa and Epworth largely depend on Lake Chivero for their water supplies.
The capital city’s piped water infrastructure, which was developed in the 1950s, initially catered for an estimated population of 300 000 people.
However, Harare’s increasing population and demand for the precious liquid has seen Lake Chivero catering for an estimated population of five million people.
The water hyacinth weed, which has also invaded Lake Chivero is threatening both the quality and volume of water, posing a big threat to Harare’s main water supply.
Factors such as public sector corruption, non-maintenance of the old water infrastructure, nonavailability of water chemicals and the general economic crisis have also been identified as some of the leading causes of Harare’s water crisis.
Then, there is the human factor behind Harare’s water crisis.
Harare is located on its headwater wetlands, which are an important source of water after run-off.
These wetlands serve as water sources that discharge water into Harare’s main water supply.
Harare’s headwater wetlands are natural water reservoirs, which recharge the water table while filtering and purifying water.
They also prevent siltation and flooding.
In Zimbabwe, wetlands are protected under the Environmental Management Act (EMA).
However, these important sources of water are under threat from a number of factors that include construction, mining, farming and corrupt land allocations.
An auditor general’s report, which covered the period 2014 to July 2019, revealed that 3 716, 64 hectares of Harare’s wetlands had been affected by construction activities.
The report revealed that factors such as governance issues, inadequate enforcement of the law, pollution, cultivation, unplanned construction and mining were among the factors leading to the destruction of Zimbabwe’s wetlands.
Urban planner, Percy Toriro, said unplanned and illegal developments are leading to destruction of wetlands and ultimately worsening the city’s water crisis.
“Harare’s location is peculiar in that it is upstream and all the water supply dams are downstream,” Toriro said.
“This includes all the four urban satellite settlements that depend on Harare for water; that is Ruwa, Chitungwiza, Epworth and Norton.
“All these settlements in the Greater Harare region and their almost four-million-plus population are in the catchment of the river systems. “
Toriro added: “Development and expansion of the urban settlements has taken the form of urban sprawl, which is replacing vegetation with the concrete jungle destroying the ecosystem.”
He said urban planning requires the need to consider sustainable development and use of wetlands.
“Assessment of land cover changes over the past 20 years shows that almost 80% of wetlands have been lost to poor planning and illegal developments,” Toriro said.
“Best practice for urban planning is a consideration of sustainable development and use of wetlands to purify water naturally as well as help store water.”
Sand mining, which has turned out to be a source of income for unemployed residents of Harare, has contributed significantly to the destruction of wetlands in the capital.
Statistics show that by 2021, Harare had lost over 721 hectares of land to sand mining.
Analysts estimate that thousands of hectares of land, including wetlands, have been degraded due to sand mining.
According to Harare provincial development coordinator, Tafadzwa Muguti, an estimated 115 000 hectares of land (predominantly wetland areas) is occupied illegally across the country.
Interviewed sand poachers in Harare South said this was their only source of income in a country with high levels of unemployment.
“We are aware of the effects of our activities but at the same time we cannot leave our families to starve when there is an alternative source of income,” said a sand poacher, who spoke on condition of anonymity.
Urban farming on wetlands, stream banks and steep slopes continues to compromise the integrity of wetlands while disturbing the city’s water ecosystem.
This has led to soil erosion and ultimately, the siltation of Lake Chivero.
Fertiliser and pesticide run-off are some of the major threats to Lake Chivero emanating from urban farming.
This has also increased the cost of water purification amid indica