Despite its relative scarcity, Ecuador is a country rich in water resources. It has an average runoff (1) of 432,000 hm3 per year, resulting in 43,500 m3 per capita per year, which is above the world average of 10,800 m3 per capita (2). This volume of water, runs through 79 watersheds and 137 sub-water basins that the country possesses. These basins are distributed along two water slopes arising from the Ecuadorian highlands.
For many years, water management has been limited almost exclusively to the management of reservoirs, construction of irrigation canals, drains, intake of water works, drinking water systems, and sewers. It has been focused on the provision of water for various activities, concentrated in the amount of water that can be delivered to a specific population or for a particular activity. However, Ecuador as well as most countries have a very high debt as to the efforts made to improve water quality and to give back to nature for the services provided to us, especially, for the industrial, domestic and agricultural waste poured in water.