Celebration of World Water Day was held under the patronage of President Gotabaya Rajapaksa and Prime Minister Mahinda Rajapaksa at the Temple Trees yesterday. This year’s theme of the World Water Day is “Groundwater: Making the Invisible Visible”. It highlights the importance of groundwater in the adaptation for water and sanitation systems, agriculture, industries, ecosystems and climate change. The President declared open the Kalutara, Agalawatta and Matugama water supply schemes via video technology, providing a solution to the mixing of saltwater into freshwater sources in the Kalutara Di…