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freshwater

A map of the contiguous United States shows the depth of the water table in different areas.
Posted inNews

Report: 13 Great Lakes’ Worth of Water Underlies the Contiguous United States

by Emily Gardner 26 January 202626 January 2026

Researchers used 1 million data points and a machine learning algorithm to estimate groundwater stores with higher resolution than ever before.

Figure from the paper.
Posted inEditors' Highlights

Calibrating the Clocks: Reconciling Groundwater Age from Two Isotopes

by Sergi Molins 26 January 202622 January 2026

A new quantitative model corrects for tracer-based age biases from 39Ar and 14C isotopes leading to more accurate estimates of groundwater residence times.

A dry lakebed with dead trees under a sunny sky.
Posted inResearch & Developments

We Are “Living Beyond Our Hydrological Means,” UN Report Warns

by Grace van Deelen 20 January 202620 January 2026

Humanity has overspent and depleted freshwater in the world’s aquifers, glaciers, wetlands, and other natural reservoirs to an irreversible degree, according to a new United Nations report.

A wetland in a green field under a blue sky.
Posted inNews

After Sackett, a Wisconsin-Sized Wetland Area Is Vulnerable 

by Grace van Deelen 5 January 20265 January 2026

An analysis of wetland legal frameworks shows how water rules could leave millions of hectares without meaningful protections.

A red horse stands in a marsh, up to its knees, and looks back at the camera.
Posted inNews

What Salty Water Means for Wild Horses

by Rebecca Owen 21 November 202526 November 2025

New research monitors how saltwater intrusion is affecting the behaviors of Shackleford Banks’s wild horses.

A satellite view of the southwestern coastline of the Netherlands shows a crisscross of rivers, estuaries, and canals.
Posted inNews

The Role of a Ditch in the Matrix

by Emily Gardner 31 October 202531 October 2025

These constructed waterways are often a “no-man’s-land” between terrestrial scientists and limnologists. But ditches’ role in transport, agriculture, biodiversity, greenhouse gas emissions, and even archaeology means it’s time to take a closer look.

A wakeboat seen from above, with frothy white waves churning off the stern
Posted inNews

A Debate over Wakes in the Land of 10,000 Lakes

by J. Besl 29 August 202528 August 2025

Wakeboats are turning Minnesota’s lakes into summertime surf spots, but the artificial chop can shake up the lake bed, too. New wake data can help communities plan for responsible recreation.

Covers of 2 books and photos of their respective editor/author with a rock outcrop in the background.
Posted inEditors' Vox

Early-Career Book Publishing: Growing Roots as Scholars

by Matthew J. Currell and Rebekah B. Esmaili 6 August 202511 September 2025

In the 1st installment of 3 career-focused articles, scientists who completed books as early-career researchers reflect on the positive outcomes the experience had on their professional development.

Clear water in Lake Tahoe with granite boulders and Sierra Nevada mountains in the background
Posted inNews

Precipitation Extremes Drive Swings in Lake Tahoe’s UV Exposure

by Andrew Chapman 26 June 202526 June 2025

An 18-year study reveals dramatic year-to-year variations in ultraviolet radiation penetration tied to Sierra Nevada precipitation cycles.

Vista satelital de estanques rectangulares de evaporación usados para extrcción de litio localizados dentro de una sal blanca brillante.
Posted inOpinions

Preocupaciones sobre el litio, el agua y el clima en los dos desiertos más altos de la Tierra

by Lan Cuo 27 May 202526 June 2025

La extracción de salmuera para satisfacer la demanda de recursos en medio de la transición a energías renovables está afectando los recursos hídricos en Sudamérica y China. Los hidrólogos pueden ayudar a comprender cómo y a sumarse a la búsqueda de soluciones.

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A view of a bridge, with the New Orleans skyline visible in the distance between the bridge and the water. A purple tint, a teal curved line representing a river, and the text “#AGU25 coverage from Eos” overlie the photo.

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