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>Most organic matter decaying behind dams is carried in by the river after the initial flooding. What is this based on? The dams producing the most methane ha
by soperj 6y ago
>Most organic matter decaying behind dams is carried in by the river after the initial flooding.
What is this based on?
The dams producing the most methane have actually flooded forests without removing the trees.
- Retric 6y agoThat’s something I heard from someone restocking fish. So, it might be an artifact of US dams being over 50 years old on average, but I assume that generally holds true globally. As to peak methane production, yea that seems reasonable. Though a great many dams didn’t cover forests, so the extremes aren’t representative of the average.
- soperj 6y agoMost trees underwater will not have decomposed in 50 years and would still be producing methane.
- Retric 6y agoI am not disagreeing with that, just saying the weight of twigs deposited by rivers behind dams is significantly more than the weight of trees that where drowned by the dam formation. Visually trees are very striking, but chemically even tiny fragments of leaves are important.