The groundwater studies carried out by Auroville Water Harvest (the implementing Agency) in some of the villages and in Auroville covered by the Kaluvelli watershed showed excessive extraction of ground water in the region and seawater intrusion in some of the coastal villages. The intrusion is also seen in some of the interior villages of the watershed. The possibilities of seawater intrusion in other regions of the watershed were also very likely and if left unattended would jeopardize the entire Vanur region. The consequences of such intrusion would be disastrous, as it will affect the irrigation, which is largely dependent on ground water.