Enlarging, protecting and utilizing freshwater lenses with horizontal wells.
The ‘Freshmaker’ uses one horizontal water well for infiltration and abstraction and is complemented by a second deeper, horizontal well. The Freshmaker aims to enlarge an existing thin freshwater lens in times of freshwater surplus, which allows later use in times of demand. Temporal freshwater surpluses are injected with the shallow well, while saline water is simultaneously abstracted from below the lens. During periods of shortage, abstraction takes place from both the shallow and deeper well. The deep well abstraction has two purposes: to create space to enlarge natural freshwater lenses and to protect the shallow well against salinization. The Freshmaker is successfully in use to supply high-quality irrigation water to fruit orchard in on a Dutch coastal island.