Rain water pond Field of leguminous plants watered by spraying Vegetated area general view Pond during the construction process
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Each restored terrace has drainage ditches at the front and back (at the top and bottom of the slopes) which are intended to collect and conduct the leftover rainwater that flows over the surface towards the perimeter ditches. The water in the ditches builds up in a system of ponds, allowing the water to be stored in order to water the same implanted vegetable species. The capacity of these ponds is approximately 8,500 m3 (terrace 9) and 4,000 m3 (terrace 11). In order to ensure that the implanted species grow correctly, a watering system has been installed throughout the restored area, so that the required water is available during the implantation process in the first years. The leguminous plants are watered periodically by means of a spraying system, whereas the trees are watered by means of a dripping system. Furthermore, the location of the ponds in high points allows watering to be carried out at a low pressure using only gravity, thus optimising the facility's resources. As the plantations begin to consolidate, they will no longer be watered, in order for the vegetation to have a similar behaviour to the original vegetation of the Garraf area, which dries up considerably during the summer season.
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