Here is my post "Be Our Guest: When the Levee Breaks, Mama You Got to Go"on the issue of human versus natural system adaptation, and "ecosystem-based" adaptation, written for the Bay Area Open Space blog.
Part four, coming out next week, talks about California adaptation initiatives.
I love that the blog editor linked my title "When the Levee Breaks, Mama You Got to Go" to a recording of the Led Zeppelin song. I didn't explain in my post that the song is actually relevant-- written about the Great Mississippi Flood in 1927, which was as much an engineering disaster as a natural disaster. Read more about the 1927 flood in John Barry's book on the matter, Rising Tide, written well before Katrina. I loan that book out but make sure to get it back, because I feel like it's a really important cautionary tale that I never want to forget. You can preview it on Google Books.