Perhaps half of all abandoned villages in Spain are in Galicia. As processes of aging, rural flight (& urbanisation) and bad (economic) perspectives continue, this development will increase. Will immigration or tourism have an impact?
I collected some fine articles, a book and a movie on the subject.
Have a look at this 13:11 documentary on Galician Ghost villages published by Celtico on the situation of the living landscape and on a family started to live in a former abandoned village.
In 'Reducing Depopulation in Rural Spain:
The Impact of Immigration' the authors (Fernando Collantes, Vicente Pinilla, Luis Antonio Sáez and Javier Silvestre, 2013) discuss research on the impact of immigration that could lead to substantial reduction.
Immigration and depopulation is also subject of the article
'Silent blight in a countryside of empty homes and shut shops'
in The Guardian (Aug 2015):
"Young people are leaving rural areas of Europe for the cities at a time when birth rates are at historic lows. As the countryside empties, should rising immigration be seen as a solution, not a problem?"