A few days ago David Zetland (shown here with his pet Komodo dragon) had a real good post on groundwater governance gone bad in Spain: "An expensive groundwater governance failure". It's well worth your time to read.
I also received the same document from a friend on which his post is based (David has a link to it on his site):
You can practice your Spanish; it is from WWF España (en español).
"One hand washes the other, and both wash the face." - Translation of a Spanish proverb on cooperation