Construction of sea retaining wall

Tanzania

2018
plus de 100 000 habitants / more than 100,000
Tanzania

Dar es Salaam

Période de réalisation de l'initiative

du 08/2017 au 06/2018

Description de l'initiative

Climate change has already led to increased temperatures and rising sea levels in this East African nation. Without major investments in adaptation, an annual average of 800,000 Tanzanians stand to be impacted by flooding caused by rising sea levels between 2070 and 2100. Around five million people currently live in Dar-es-Salaam, a coastal metropolis at risk of flooding.
Dar es Salaam City Council developed a Concept Note on Construction of a Sea retaining Wall in 2011. This was submitted to the United Nations system, to the UN Environment and UNOPS. UNOPS and UN Environment worked with the Government of Tanzania to increase the resilience of coastal areas against the impacts of climate change and rising sea levels.
The idea for the construction of a sea retaining wall came after a heavy rainfall event, which was accompanied by flooding and sea level rise. As a result of this event, beaches and the surrounding environment were covered by sea water. And this event has aggravated the vulnerability of the city by causing erosion along the beaches.
The main objective is to build seawalls and restore coastal ecology in order to protect the city from rising seas for 50 years to come.
The project focused on reducing erosion along the beaches and enhancing the resilience of surrounding areas where infrastructures and settlements were vulnerable.
Project implementation methodology: a contractor was hired to construct new gray and green infrastructures in the area.
The beneficiaries of this project are Dar es Salaam City communities, including all income groups. The protected area is a core location for different economic, institutional and social activities.
Project cost: the project was implemented from 2014 to June 2018 under DCC supervision at a cost USD 5.8 Million.
Project Output:he project was successful due to the support of UNEP and the Vice President’s Office and close supervision of Dar es Salaam City Council.

Principaux résultats obtenus

A total of 1180 m of seawalls constructed, including 800 meters along Barack Obama Road and 380 along the Kigamboni coastal area. Economic activity is now recovering on the city’s coastlines. Traders in fruits and nuts are returning. We can make this a place of opportunities for people to sell, buy and relax.
Further inland, a network of drainage systems was installed to channel floodwaters to the ocean. Even before the project was finished, this brought significant relief to local communities.