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Question:How subsurface gasses migrate and what allows them to dissipate? Landfill gasses

by denissebn_06 | with sarasage July 12, 2021 20:55 | #27075

As a community air monitor, we want to know more about subsurface gasses and their interaction with atmospheric pressure. Specially landfill gasses.

This question came out of a conversation with the Fellowship Team located in Val Verde, California, USA. Interested in learning more about their air quality monitoring project and following their progress? Follow us here: VVAMP


Great!! Thanks for posting this. @fongvania wondering if you can dig into this one a little bit?

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Sure! I'll do a bit of research into this and report back :)

According to this article, Analysis and modeling of vadose zone gas transport : modeling methane emissions from landfills, their Landfill Methane Emissions model found that the "primary variable affecting shallow vadose zone gas transport are air temperature fluctuations." California Air Research Board, in [this webinar] (https://content.govdelivery.com/accounts/CARB/bulletins/2b953ef) found that soil cover characteristics had the greatest impact on emissions of methane, nitrous oxide, and NMVOCs. This study on gas releases from oil and gas wells indicates that atmospheric pressure and groundwater flow also affect the transport and release of subsurface gases.

Transport also depends on gas production rate, compaction level, soil cover gas permeability, and soil-air content.

Hopefully this helps--if you need any more specifics, I can help identify some experts who can weigh in.

@sarasage Hope this is helpful to you.

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