Origins of Recharge of the Grombalia Groundwater
Rym Mhamdi1, Mohamed Mechergui2

1Rym Mhamdi, Geology Department of Sciences of Tunis, Tunisia.

2Mohamed Mechergui, Department of Rural Engineering, Waters and Forests, National Agronomic Institute of Tunisia, Tunisia.

Manuscript received on 03 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript Published on 10 July 2019 | PP: 69-73 | Volume-8 Issue-7C2 May 2019 | Retrieval Number: G10170587C219/19©BEIESP

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Abstract: The aquifer system of Grombalia is fed directly by the rainfall inputs and indirectly by the inputs of oued and adjacent aquifers. The ground water is submitted to intensive exploitation for irrigation purposes. This situation pushed for the use of hydraulic installations and the practice of artificial recharge (seven recharge sites). To see the origins of recharge of the Grombalia groundwater, trend curves must be drawn between the piezometric level and rainfall inputs. The interpretation of these curves allowed us to conclude that there are different zones: -Areas where the main feed agent for the ground water is rainfall as such as the BeniKhalled area. -Areas where there are two feed agents for the ground water which are the rainfall and the oued, such as the zones of Douar Ben Attia and Fondouk Jedi. -Areas where other sources of supply of the ground water and much more powerful than the rainfall such as the zones of MenzelBouZelfa, Bouchrik, CharrayBou, BouArgoub. For the Bouchrik area, it is influenced by the contributions of ouedsidiToumi and the volumes injected into the Gobba1 recharge site. Regarding the Echrifet area, this is the effect of the coastline marked by the accumulation of water in this area. In the Boucharay area, ouedEllomaleh inputs are the main recharge factor for the groundwater. In fact, for the Menzel Bouzelfa zone, the main factors of recharge of the ground water are the contributions Of Oued SidiSaïd and the water injected into the El Amrine recharge site. -Regarding the area of Bou Argoub, Oued Bou Argoub contributes strongly to the recharge of the ground water.

Keywords: Grombalia Plain, Groundwater, Natural Recharge, Artificial Recharge, Correlation Coefficient, Piezometric Fluctuations, and Rainfall Input.
Scope of the Article: Artificial Intelligence