The policy act on interventions for the optimization of water resources intended for irrigation in the water systems of some areas of Sardinia has been approved, those characterized by low rainfall which therefore present the most important shortcomings from the point of view of accumulated reserves.
The green light came from the Institutional Committee of the Basin Authority , chaired by the Councilor for Public Works, Pierluigi Saiu, representing the President of the Region, and with the participation of the Councilor for Agriculture, Valeria Satta.
In yesterday's meeting, the Committee confirmed the actions already decided in November for the North-Western systems (Temo, Cuga, Bidighinzu and Surigheddu reservoirs), Northern Sardinia (Pattada at Monte Lerno), Posada (Maccheronis reservoir) and Cedrino (Maccheronis reservoir) of Pedra'e Othoni) and ordered, in these currently deficient systems, the assignment of water volumes for irrigation use for the first quarter of 2023.
«We continue on the path already started in recent months. In collaboration with all the entities involved in water management, we have indicated a series of emergency measures aimed at countering critical issues and optimizing resources with the aim of guaranteeing, as far as possible in relation to the volumes available, the water needs of the countryside, while drinking water and industrial uses are however guaranteed. Some interventions are already in progress and we are closely monitoring those to be implemented soon», commented councilor Saiu.
As regards the individual water systems, the data recorded in December show 36% filling in the Lerno (against 63% in the same period in the previous year), 30% in the Bidighinzu (37% in 2021), 58% in the Cuga (unchanged compared to last December), 41% in the Temo (80% in 2021), 15% in the Posada a Maccheronis (6% in 2021, determined by the works to clear the lake), 15% in the reservoir of Pedra 'e Othoni (67% in 2021).
For the planned interventions, adds the exponent of Giunta Solinas, "they range from the activation of local resources such as, for example, the wells of Bonassai and Tottubella, by the Consorzio di Bonifica della Nurra, which together with the Sella and Mosca , already active, will relieve the supply from the Cuga of about 200 liters per second, to the implementation of the systems and management organization by Abbanoa and the other parties involved, as a precondition for allowing the recovery of wastewater from the purification of water in the city of Sassari and possible reuse in agriculture, the acceleration for the completion of the works on the Monte Lerno dam, by Enas, for the restoration of the entire volume useful for the supply, now reduced to 50%, foreseeing in addition, maintenance interventions on supply lines and aqueducts to reduce waste».
For the four water systems, the withdrawal volumes scheduled for the first quarter of 2023 amount to a total of approximately 5.8 million cubic meters : 1.97 million cubic meters from the Temo-Cuga-Bidighinzu-Surigheddu water system; 1.5 million cubic meters from the Monte Lerno reservoir; 0.5 million cubic meters overall from Maccheronis (an increase of 0.3 million cubic meters per month for February and March will be estimated); 1.8 million from Pedra 'e Othoni.
Lastly, the Committee resolved on the volumes of supplies from Lake Cixerri, which starting from mid-January will have to ensure 50% of the needs of the Bau Pressiu purification plant , to ensure the supply of the Sulcis aqueduct even in anticipation of severe drought.
«The crisis of some water systems is certainly related to the changed weather and climate conditions and to a particularly lean hydrological year - concludes councilor Saiu - but the efficiency of the same systems is compromised by the state of some infrastructures on which it is necessary to intervene to reduce losses and increase the capacity of the reservoirs. With a view to optimizing the management of available resources, measures will also be put in place to increase the use of waste water, guaranteeing better efficiency of Sardinia's water systems".
(Unioneonline/ss)
