 There are studies reflecting potential groundwater resources in areas were groundwater is currently being used which represents only 15% of Colombia's territory.According to FAO, Colombia has 90 small dams with a total storage capacity of 3.4 km3 and 26 large dams (with a storage capacity of more than 25hm3) with a total capacity of 9.1 km3.Colombia also has about 1,500 lakes with a storage capacity of 8 km3.