Page 31 - AL BUHAIRA RAPPORT 2022

6 Caring activity of Monitoring and following up the lake

the lake water surface water quality and the environmental

situation of the water surface
Monitoring the rainwater network connected
Laboratory activity to the lake

• The water surface of the lake is a balanced natural environment that represents one of the main pillars
The company’s laboratory monitors the quality of the lake’s water and the rainwater The quality of rainwater is continuously monitored at the level of the lake’s
of the bank development process. On this basis, the company attaches great importance to its care and
that flows into it, and monitors the environmental situation of the lake’s water sewage at 20 points, particularly in times of rainfall with the aim of evaluating
continues to preserve its environmental system, for more than 33 years, by implementing a monitoring
surface periodically and continuously as part of an annual programme prepared possible contamination and taking the necessary measures, in coordination
and maintenance program that is an example and a point of excellence that contributed to making the lake
in advance. The results of monitoring at the reference stations (5 stations) have with the government departments.
project a place of attraction and an area for the development of recreational, cultural and sports activities.
shown that the lake water quality specifications are very close to sea water and in Bacteriological analyzes are also being carried out by the Pasteur Institute of
• The lake’s waters are characterized by their natural continuous regeneration with seawater, through tidal
compliance to the required level and approved standards, indicating the continuity Tunisia to ascertain the quality of the lake’s water and monitor the arrival of
movements at a rate of every 22 days. By maintaining the water quality, we ensure
of the regeneration of the lake’s water with the sea in the desired capacity, thereby water that does not conform to the swimming water specifications, to ensure
the stability of biodiversity involving at least 42 species of algae, approximately
ensuring the continuity of the water surface environmental balance. that the situation is addressed with the concerned structures.
40 species of fish and several other species of animals, which has continued
for years. (Compared to a few numbers before the The results during 2022 were identical to the approved standards and the required level
lake’s cleansing period which did not exceed 10 Lake ratios converge with seawater ratios
types of algae and some fish species). 35
1 200
30
1 000
25
800
20
600 15

400 10
200 5

0 0
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
The percentage of nitrogen in the water The ratio of phosphorous in the water

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