r/wetlands • u/whiskysigns • 5h ago
Is what’s happening in Long Beach climate change, or are we also seeing a shoreline behaving the way shorelines have always behaved?
I’m genuinely curious about this and would love to hear from people who know the history of the area better than I do.
I read a comment from a woman who said she has watched Long Beach ebb and flow over more than sixty years, with periods when there was a huge amount of beach and periods when the water came much farther in. I haven’t stopped thinking about it.
I study wetlands, and one thing that comes up again and again is how much we have built cities on landscapes that were never especially fixed to begin with. Wetlands expand and contract. Rivers move across floodplains. Beaches erode and rebuild. Estuaries shift. Water follows old channels. Then we drain wetlands, dredge bays, fill low ground, straighten rivers, build seawalls and breakwaters, truck in sand, and draw very permanent property lines across landscapes that are still moving underneath all of that infrastructure.
So I’m wondering how much of what we’re seeing in Long Beach right now is part of a much longer coastal cycle that becomes disastrous because we have built permanent homes and infrastructure within that moving system.
Obviously sea-level rise and climate change can raise the baseline and make flooding and erosion more frequent or severe. I’m interested in the other layer too. How much of this is a naturally dynamic shoreline colliding with the expectation that the shoreline should remain exactly where we built it?
Has anyone here lived in Long Beach for decades, studied its wetlands or coastal history, or seen old maps and photographs showing how much the shoreline has moved over time?