Urbanisation, pollution threaten flamingos habitat in Tunis wetland

Around 48 percent of Tunis residents live around the lagoon.

Wednesday 31/03/2021
Conservationists cry foul over construction threat to Tunis lagoon’s bird life. (AFP)
Conservationists cry foul over construction threat to Tunis lagoon’s bird life. (AFP)

Sijoumi, Tunisia  - Hundreds of flamingos wade past waste in the murky waters of the vast Sijoumi lagoon, a critical wetland in the heart of Tunisia’s capital  which is threatened by rapid urban growth.

Once set apart from the city, today half of Tunis’ residents live on the banks of the “sebkha”, or mudflat, where more than 100,000 birds of some 100 different species spend winter.

The birds’ human neighbours complain of pollution, recurrent flooding and swarms of mosquitos from the lagoon, one of North Africa’s most important wetlands that became a dumping ground during decades of urbanisation.

A government-led project that includes buildings, concrete embankments and digging into the mudflat aims to control pollution and regenerate the habitat, but some environmental groups have pushed back against the initiative.

Hamdi, a 31-year-old shopkeeper in the working-class district of Sidi Hassine, hopes the project will beautify the area and solve the “problem of plastic waste and flooding from rainwater”.

The lagoon plays a vital role not only in absorbing the overflow of water during heavy rains, but also as a breeding ground for the flocks of migratory birds that gather there at the end of winter.

But as people from the countryside have  flocked to Tunis, unauthorised building has flourished in the former agricultural suburbs of the city and the lagoon became a dump for waste, mainly from construction.

– Source of flooding –

More than 1.8 million cubic metres of solid waste is estimated to have been disposed of in the Sijoumi’s waters since 2009, according to a government study.

As a result the 2,600-hectare lagoon has been unable to absorb as much rainwater during downpours, leading to flooding that often forces businesses and schools to close.

Since 2015, Tunisian authorities have been studying a project to clean up the Sijoumi and protect the area from flooding, while developing its economic potential through further construction.

Around 48 percent of Tunis residents live around the lagoon, according to the latest census from 2014 and the surrounding neighbourhoods are particularly densely populated, with some 2,800 people per square kilometre.

The north of the lagoon is lined with brick and concrete buildings that were erected without authorisation.

A part of the southern banks has remained untouched and still serves as a refuge for ducks, flamingos and gulls.

But most people do not visit these wild parts of the lagoon, with its olive trees and poppies at the water’s edge, because the area is seen as dirty and a place to avoid.

Industrial and domestic sewage spews into the Sijoumi and the battered wreckage of cars and trucks are piled up on the banks.

– Environment concern –

Given its diversity, the lagoon was added to the Ramsar List of Wetlands of International Importance in 2007. Indeed, it is considered to be the fourth most significant wetland in North Africa.

Nadia Gouider, director of the government’s Sijoumi lake project, said any development must be sustainable and aim to “save and support the lung of the capital”.

But environmental activists are concerned about the potential impact of the project, whose cost could reach 130 million euros (more than $153 million).

The construction of two business districts, Lac-1 and Lac-2, in a large marshy area nearby in the early 1990s has already caused most flamingos to flee to Sijoumi and other wetlands.

Imen Rais, an expert with environmental group , the World Wildlife Fund (WWF), warned of the negative impact of wetland decline in Tunisia, underlining its importance to minimise the “phenomena linked to climate change like floods, drought and storms”.

Hichem Azafzaf, scientific coordinator for a bird protection association, said: “We aren’t against the development project in general.” But, he added, as he scanned the lagoon from a wooden observatory through binoculars, “we are against the current version”, which includes deepening the lagoon. Many birds will be deprived of food because they can’t dive deep.”

Gouider said this shouldn’t be a problem as “only one third of the lake’s surface will be deepened by about one metre (three feet), which will leave space for the birds”.

In any case, she added, between back-filling, illegal dumping and unregulated building, “if we do nothing, the lagoon will disappear”.