Dont know if any of you have seen this clip off youtube,its how japan has resolved its flooding problems and water storage.....seeing as we are being told flooding will happen more often followed by droughts we do need to go down this route but then again it would dent the water companys profits so I doubt it would happen.
http://www.youtube.com/watch?v=B1VIepfMLbA
http://www.youtube.com/watch?v=B1VIepfMLbA