Dan, I'm not sure why the Times and Globe blocked those articles. I am not a digital subscriber to the Globe and I was able to access it. The Times has a policy of access to a certain number of articles per month for non-subscribers. Maybe they are picking on Canadians.
The upshot of the first article is that despite a ruined stream, some people still find it a nearby peaceful place to escape the ecological disaster called LA.
In Boston and other places including Brookline NY, uncovering channelized and covered streams is becoming feasible and in some cases necessary due to increased runoff.
In a watershed nearby, the connection to the estuary is a large box culvert which upstream has no cover but still has a "bed" and "banks" of concrete. This terminates in a big fish ladder that over a quarter million herring climb each spring. They still have to pass through several box culverts and concrete channels to get to a pond to spawn. I suppose there is a virtue in box culverts because they prevent the ospreys and cormorants from over grazing the vulnerable herring exposed on flat open concrete "stream beds" for at least some of their migration.
Once one of our coastal streams looses its herring and smelt runs it is almost impossible to restore them. Yet somehow, scouts leave the main schools and find a stream that has been rehabilitated and hopefully a sustainable population will develop. I've been working on this problem for a while and alternate between optimism and pessimism but I'm not ready to give up. It is those scouts that give me some measure of hope.