Palma.—The Balearics is the region of Spain registering one of the highest increases in its natural underground water supply, the Spanish Institute for Geology and Mining reported yesterday.

However, the same research showed that 21% of Spain's subterranean resources have suffered severe losses since the last drought period from the summer of 2005 to the autumn of 2011, in one instance by as much as 50%.

The study, listing the outstanding increase of 81% in the Balearics, explained that underground water forms an important part of the country's water supply as a whole, not just in terms of volume but the spread of the network of “aquifers” or underground rivers.

Nationally, the subterranean supply accounts for around 1'400 million cubic metres a year, enough for the drinking water of 30% of the population, the Institute confirmed.