Counts (S) of anadromous adults in eight populations of the Santa Monica Mountains BPG. Counts are adjusted by +1 so that zero counts show up on the log scale Graphic: Boughton, 2022 in SWFSC 2022

Steelhead trout, once thriving in Southern California, are declared endangered – “The negative trend toward extinction has not reversed”

By Ian James 23 April 2024 (Los Angeles Times) – Southern California’s rivers and creeks once teemed with large, silvery fish that arrived from the ocean and swam upstream to spawn. But today, these fish are seldom seen. Southern California steelhead trout have been pushed to the brink of extinction as their river habitats have […]

Approximate depths of subsurface activities. Median (31 m) and 95th (130 m) percentile of water wells (Jasechko & Perrone, 2021); minimum depth of CCS in sedimentary basins (800 m) (Benson & Cole, 2008); shallow limit of oil and gas development (including injection and disposal; 600 m) (Lemay, 2008); geothermal (>2,000 m) (Nardini, 2022). The upper temperature limit for life (80–121°C) (Bar-On et al., 2018; Magnabosco et al., 2018) approximately corresponds to the lowest temperatures required for geothermal power generation (Nardini, 2022; Tester et al., 2021). Circulation of meteoric water occurs up to depths of a few km (McIntosh & Ferguson, 2021) but fluxes are small below 500 m and residence times range from tens of thousands to millions of years (Ferguson et al., 2023; Jasechko et al., 2017; Warr et al., 2021). Graphic: Ferguson, et al., 2024 / Earth’s Future

Human activities have an intense impact on Earth’s deep subsurface fluid flow – “We know more about the surface of Mars than we do about water, rocks, and life deep beneath our feet”

By Niranjana Rajalakshmi 23 April 2024 (University of Arizona) – The impact of human activities – such as greenhouse gas emissions and deforestation – on Earth’s surface have been well-studied. Now, hydrology researchers from the University of Arizona have investigated how humans impact Earth’s deep subsurface, a zone that lies hundreds of meters to several […]

Mike England, who owns England Farms and Cattle Company located 29 miles east of McAllen, walks across one of the fields on his farm near Mercedes, Texas on 18 April 2024. England had to destroy 500 acres worth of sugar cane he’d grown because of the ongoing drought in the Rio Grande Valley. Credit: Photo: Ben Lowy / The Texas Tribune

South Texas farmers are in peril as the Rio Grande Valley runs dry, again – “Without water, what are we using to grow our crops? What are we able to pay back those loans with?”

By Berenice Garcia 18 April 2024 MERCEDES, TEXAS (The Texas Tribune) – Across the street from a red barn, a 40-acre field once covered by a sea of green sugar cane leaves now sits dry and thirsty. Irrigation water is dangerously elusive for the fields of the Rio Grande Valley. Mike England, who owns England […]

Twenty-first century groundwater-level trends in globally distributed monitoring wells. Each point represents one monitoring well, coloured to represent the Theil–Sen trend of annual median groundwater levels during the twenty-first century. Blue and red points indicate shallowing and deepening, respectively, of groundwater levels over time, with darker colours indicating faster rates. a, Spatial distributions of groundwater-level trends in globally distributed monitoring wells. b–o, Regional maps illustrating the substantial spatial variability in groundwater-level trends. Supplementary Notes 16 and 17 show monitoring wells and their groundwater-level trends at subcontinental scales (Supplementary Note 16) and in 207 individual aquifer systems. Graphic: Jasechko, et al., 2024 / Nature

Groundwater resources are drying up across the globe – “Climate variability and change can impact water supplies underground as well as above-ground”

By Matthew Rozsa 24 January 2024 (Salon) – Humans rely on groundwater for many things, but especially our food. Roughly 30 percent of all the planet’s available freshwater comes from groundwater, or water that is found underground in the spaces between rocks, soil and sand. It is primarily used for agriculture and billions of humans are dependent […]

Sean de Guzman, the manager of the California department of water resources snow surveys and water supply forecasting unit, and his team measure snowpack in January 2024. Photo: Andrew Nixon / California department of water resources

California snowpack lowest in decade despite hope with December 2023 storms – “In some places there is literally no measurable snow on the ground at all”

By Gabrielle Canon 4 January 2024 (The Guardian) – In the first snow survey of the season, California came up short – just 25% of the historical average – despite a spate of strong storms that caused flooding and landslides along the coast in late December. On Tuesday, officials measured a depth of just 7.5in at a […]

A church is surrounded by water in a flooded neighborhood in Kherson, Ukraine, following the destruction of the Kakhovka Dam in June 2023. Photo: Evgeniy Maloletka / Associated Press

Water increasingly at the center of conflicts from Ukraine to the Middle East – “It’s very disturbing that in particular attacks on civilian water infrastructure seem to be on the rise”

By Ian James 28 December 2023 (Los Angeles Times) – Six months ago, an explosion ripped apart Kakhovka Dam in Ukraine, unleashing floods that killed 58 people, devastated the landscape along the Dnipro River and cut off water to productive farmland. The destruction of the dam — which Ukrainian officials and the European Parliament blame on Russia, […]

Aerial view of two large ships traveling on a drought-stricken Mississippi River. Photo: Philip Gould / Getty

The Mississippi River is losing its fight with the ocean – “This is not a one-off or once-in-100-years thing”

By Nancy Walecki 11 October 2023 (The Atlantic) – The mouth of the Mississippi River is the arena for a kind of wrestling match. In one corner of the ring is the salt water of the Gulf of Mexico, and in the other, the river’s fresh water. The two shove against each other, and usually, […]

Aerial view of boats stranded in the mud of the parched Rio Negro amid a drought in the Amazonas state of Brazil on 29 September 2023. Photo: Michael Dantas / AFP

Drought drains Brazilian Amazon residents reliant on waterways – “It’s every man for himself”

By Orlando Junior 3 October 2023 (AFP) – Not far from the emblematic site where the black waters of the Rio Negro join the brown currents of the Solimoes, two chief tributaries of the Amazon, what once was a lake has given way to a vast stretch of cracked mud. Now, the only water remaining […]

Geographical pattern of the primary drivers of deteriorating status among amphibians. a,b, The primary drivers of deteriorating status among amphibians during 1980–2004 (482 species; a) and 2004–2022 (306 species; b). Cell colour was determined by the primary driver impacting the most species. Where two primary drivers equally contribute to a cell, an intermediate colour is shown. The stars indicate where the primary driver is undetermined or there are numerous primary drivers. The cell area is 7,775 km2. Graphic: Luedtke, et al., 2023 / Nature

Climate change emerges as major driver of amphibian declines, new research finds – “It’s a gut punch and an awakening”

By JoAnn Adkins 4 October 2023 (FIU) – Amphibians are in trouble and in desperate need of conservation action, according to a new global assessment of the world’s amphibian population. Salamanders are experiencing the greatest decline in numbers, but frogs, toads, newts, and salamanders throughout the Neotropics — extending from South Florida and Caribbean islands […]

Alain-Richard Donwahi in May 2017, in Abidjan. Mr. Donwahi is a former Ivory Coast defence minister who led the 2022 UN COP15 summit on desertification. Photo: Sia Kambou / AFP

Global heating likely to hit world food supply before 1.5°C, says UN expert – “Climate change is a pandemic that we need to fight quickly. See how fast the degradation of the climate is going – I think it’s going even faster than we predicted.”

By Fiona Harvey 12 August 2023 (The Guardian) – The world is likely to face major disruption to food supplies well before temperatures rise by the 1.5C target, the president of the UN’s desertification conference has warned, as the impacts of the climate crisis combine with water scarcity and poor farming practices to threaten global […]

Social media & sharing icons powered by UltimatelySocial