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350,000 years of Great Basin groundwater recharge
Devils Hole water-table history plus a groundwater model shows glacial recharge more than doubled modern rates while interglacial drying cut them only modestly.
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What record constrains 350,000 years of AMGB recharge?
Uranium-series dated paleo-water-table elevations at Devils Hole.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What modern recharge volume is the 0% reference?
2.59 × 10^7 m³/yr at 0 m relative water table.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
How high was the glacial Devils Hole water table at least?
+9.5 m relative to modern.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What recharge increase matches that +9.5 m floor?
At least 244% (scaled) and 233% (uniform) above modern.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
How low was the interglacial water table likely?
Below modern but above −1.6 m.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What recharge drop matches −1.6 m?
Less than 17% (scaled) and 22% (uniform).
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
Which recharge map better fits dry climates?
Scaled highland-focused recharge, not uniform valley recharge.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What glacial slope links water-table change to percent recharge?
2.2 cm/% (scaled) and 2.7 cm/% (uniform).
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What is the principal modern recharge source to the AMGB?
Snowmelt from highland areas.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
Why is a millennial perspective needed here?
The large basin has >1000-year equilibration between recharge and water-table change.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified
What claim do the authors make about novelty?
First quantitative southern Great Basin recharge estimates over 350,000 years.
Source: A 350,000-year history of groundwater recharge in the southern Great Basin, USA · DOI · quote verified