home.social

#waterquantity — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #waterquantity, aggregated by home.social.

  1. 💧🌏 Greg Cocks @gregcocks

    As Above, So Below? A Framework For Integrating Long-Term Water Quantity Trends Reveals Divergent Patterns In Groundwater And Low Streamflow Across The United States
    --
    doi.org/10.1088/3033-4942/ae89 <-- shared paper
    --
    usgs.gov/mission-areas/water-r <-- shared @USGS (technical) news release
    --
    H/T @Renae Logston | Senior Environmental Scientist | Translating Decades of Water Data into Operational Decisions & Measurable Cost Savings
    “The West and Southwest are drying both above and below ground. The Upper Midwest is getting wetter. And in the High Plains and the Mississippi Alluvial Plain, the rivers and the aquifers have been telling different stories for decades.
    That is the regional picture [from the authors (link above). They] compared trends in annual 7-day low streamflow with trends in annual mean depth to groundwater across the U.S., over windows of 2000 to 2020, 1990 to 2020, and 1980 to 2020.
    The national tilt: low streamflow has tended to rise while groundwater levels have tended to fall. At individual sites, the two often disagreed, with a skew toward wetter low flows and deeper water tables.
    The mismatch matters for anyone who treats a river gauge as a stand-in for the aquifer beneath it. In regions with long-term mismatches, like the High Plains, a river’s low-flow trend does not tell you what the water table is doing.
    One methods note worth keeping: agreement improved with longer records and regional grouping, and hydrologic landscape regions (climate, relief, and geology combined) gave the best agreement of the five groupings tested. Window length and grouping are choices, and they shape the answer.
    Where does your system sit: rivers and aquifers moving together, or apart?...”

    @USGS

    #hydrology #groundwater #dataanalysis #timeseries #waterscience #water
Share on Mastodon

Enter the server where you have an account.