#waterchemistry — Public Fediverse posts

Canadian Prairies Wetland Stressors And Indicators - A Systematic Review To Inform Monitoring And Management
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https://doi.org/10.3389/fevo.2026.1924686 <-- shared paper
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H/T @Danielle Cobbaert | Wetland Scientist
“[The author’s] new publication [link above] that assesses current knowledge of the key natural and human drivers, and pressures that affect prairie wetland area and conditions and evaluates effects on wetland area, hydrology, water quality, biodiversity and ecosystem services. This publication provides an evidence-based conceptual model that is informing the development of an Alberta Wetland Monitoring, Evaluation and Reporting (MER) Plan by identifying key wetland pressures ecosystems responses and monitoring priorities. The literature review supports prioritizing monitoring of wetland surface water chemistry, hydrology, wetland area, soils, birds and plant communities…”
#water #hydrology #hydrography #Canada #prairie #prairiepothole #wetland #marsh #water #drivers #parameters #waterquality #biodiversity #ecosystem #stressors #indicators #model #modeling #spatialanalysis #spatial #mapping #spatiotemporal #Alberta #monitoring #evaluation #reporting #literaturereview #waterchemistry #soil #sediment #migratory #bird #plants #vegetation #flood #drought #extremeweather #agriculture #urban #development #drainage #engineering #contamination #ecozone #topography #geomorphology #hydrogeomorphology #anthropogenic #recreation #levee #conservation #DriverPressureState #evidence

Confining water at the nanoscale does more than change its structure. It provides a way to tune its chemical reactivity.

Understanding these mechanisms could inform the design of catalysts, membranes and other systems where interfacial water plays a central role.

🔗 https://www.science.org/doi/10.1126/sciadv.aeb5772

#InterfacialScience #Nanoconfinement #Catalysis #WaterChemistry

Rock Weathering Can Counteract River CO2 Emissions Induced By Permafrost Thaw
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https://doi.org/10.1038/s41586-026-10664-8 <-- shared paper
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H/T @aaron Bufe
“[The researchers] measured carbon emissions and water chemistry in 50 headwater rivers draining 780,000 km² of the Tibetan Plateau.
The rivers flow in landscapes underlain by continuous permafrost and landscapes in which the permafrost has retreated since the last glacial maximum. They collect[ed] organic carbon from soils and dissolved inorganic carbon that is fixed by rock-weathering.
Where the permafrost cover is continuous, rivers emit CO2 from degrading (permafrost) soil carbon. Weathering reactions in these catchments are relatively slow.
In landscapes with (almost) no permafrost, carbon fluxes from weathering are faster than CO2 emissions from rivers.
Thus, as permafrost landscapes transition to landscapes without permafrost cover, chemical weathering reactions may play an ever more important role in riverine carbon cycling.
Interestingly, weathering can affect the carbon cycle in different ways. Where sulfide minerals are present, weathering reactions can emit CO2. Where silicate minerals dominate, weathering draws down CO2 from the atmosphere…”
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“Climate-induced permafrost thaw unlocks large stores of organic carbon that are mineralized and emitted as carbon dioxide (CO2) from rivers to the atmosphere. Concurrently, warming and permafrost thaw can increase mineral weathering rates, thus affecting the release and sequestration of inorganic carbon. Yet how these biological and geological carbon cycles interact and jointly affect CO2 dynamics (emission compared with drawdown) in permafrost rivers remains unknown. Here [they] combine[d] CO2 emissions, organic and inorganic solute concentrations, dual carbon isotopes (δ13C–Δ14C) and geochemical modelling to infer how permafrost thaw may affect river biogeochemistry over decades to centuries across the Qinghai–Tibet Plateau. Leveraging a gradient of thermal permafrost degradation, we find that river CO2 emissions decline, whereas solute fluxes from rock weathering increase with decreasing permafrost cover. Across this region, net CO2 drawdown fluxes from rock weathering are about 35% of river CO2 emissions, varying from around 15% in catchments with continuous permafrost to more than 100% in catchments with discontinuous or isolated permafrost. Thus, carbon fluxes from chemical weathering may become increasingly important with ongoing permafrost thaw, potentially even outpacing river CO2 emissions. [Their] findings disentangle the interplay between biological and geological carbon fluxes that are important for the cryosphere and the global carbon cycle…”
#permafrost #melting #thaw #climatechange #warming #Tibet #TibetanPlateau #Qinghai #water #hydrology #carbonemissions #CO2 #emissions #waterchemistry #waterquality #cryosphere #sediment #sedimentation #weathering #rock #carbon #river #riverine #carboncyling #geochemistry #biology #geology #soil

The 10 Cleanest Lakes In The United States
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https://www.worldatlas.com/lakes/the-10-cleanest-lakes-in-the-united-states.html <-- shared technical article
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https://www.lake.com/company/reports/cleanest-and-dirtiest-lakes-in-america/ <-- shared 2025 Cleanest and Dirtiest Lakes in America Report
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[this post should not be seen as an endorsement of any specific organisation’s approach or views]
#water #hydrology #hydrography #waterquality #USA #CONUS #waterbody #best #worst #impaired #pollution #waterresources #cleanest #lake #waterchemistry #sampling #monitoring #NWQA #dissolvedoxygen #ammonia #lead #phosphorus #sulfate #totaldissolvedsolids #TDS #turbidity #pH #geography #hydrogeomorphology #management #planning #policy #farming #agriculture #waste #climatechange #agriculturalrunoff #drought #extremeweather
@Environmental Integrity Project

Mercury content in natural water bodies (lakes and rivers) #mercury #heavymetals #waterchemistry
... Continue to: https://youtube.com/shorts/oLpGqDNZAgQ?si=TdByOc40IJgh86ng

Antimony content in natural bodies of water (lakes and rivers) #antimony #waterchemistry
... Continue to: https://youtube.com/shorts/qs_OFdfYp6k?si=I-t7PPvxrODvEsbb

🧪 The “Oversaturation Illusion” in Kryvbas Mine Waters

While modeling Kryvbas water chemistry (R + PHREEQC), I found a fundamental issue in how saturation is often evaluated.

We usually calculate calcite equilibrium from ion concentrations — fine for fresh water.
But Kryvbas mine waters are brines, where ionic strength and complexation dominate.

📉 Results from ~1000 samples (minteq.v4):
- Once salinity exceeds ~3 g/L, Ca²⁺ activity drops sharply.
- At 15–20 g/L, calcium activity coefficient is ≈ 0.35.

Meaning: more than half of the “calcium concentration” is inert — a dead load that cannot form precipitates.

This explains why traditional methods predicted oversaturation where the water was actually aggressive and dissolving rocks.

Modeling: PHREEQC + minteq.v4 (US EPA), Davis equation.

#Hydrogeochemistry #WaterChemistry #PHREEQC #Geochemistry #Groundwater
#Mining #Tailings #IonActivity #Thermodynamics #Kryvbas #OpenScience #RStats #SvystunovaGully

Lead content in natural bodies of water (lakes and rivers) #lead #water #waterchemistry #chemistry
... Continue to: https://youtube.com/shorts/MCpIVNvp3zQ?si=zxM8QrRiYLZLAd3-

Mercury content in natural water bodies (lakes and rivers) #mercury #heavymetals #waterchemistry
... Continue to: https://youtube.com/shorts/oLpGqDNZAgQ?si=TdByOc40IJgh86ng

Tin content in natural water bodies #tin #heavymetals #waterchemistry #waterquality
... Continue to: https://youtube.com/shorts/rjqE1-v3fzg?si=LapDjKz4XWYdjPoB

Freshwater acidification (Hydrology 💧)

Freshwater acidification occurs when acidic inputs enter a body of fresh water through the weathering of rocks, invasion of acidifying gas, or by the reduction of acid anions, like sulfate and nitrate within a lake, pond, or reservoir. Freshwater acidification is primarily caused by su...

https://en.wikipedia.org/wiki/Freshwater_acidification

#FreshwaterAcidification #Hydrology #WaterChemistry #WaterPollution #EnvironmentalScience #GreenhouseGasEmissions

Alaska's Rusting Waters - Pristine Rivers And Streams Turning Orange | Metal Mobilization From Thawing Permafrost To Aquatic Ecosystems Is Driving Rusting Of Arctic Streams
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https://phys.org/news/2024-05-alaska-rusting-pristine-rivers-streams.html <-- shared technical article
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https://doi.org/10.1038/s43247-024-01446-z <-- shared paper
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#GIS #spatial #mapping #remotesensing #satellite #imagery #Landsat #earthobservation #Alaska #water #hydrology #Arctic #permafrost #melting #thawing #climatechange #waterchemistry #ecosystem #upland #waterquality #humanimpacts #discolourisation #BrooksRange #aquatic #foodweb #drinkingwater #watersecurity #subsistence #fishing #iron #Fe #rust #minerals #mineralogy #sediment #soil #sampling #pH #sulfides #weathering #erosion #drainage #streamflow #iron #zinc #nickel #copper #cadmium #waterresources #ecosystems

Groundwater A Significant Source Of Pollution On Great Barrier Reef, Study Shows
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https://www.theguardian.com/environment/2023/oct/09/groundwater-a-significant-source-of-pollution-on-great-barrier-reef-study-shows <-- shared media article
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https://doi.org/10.1021/acs.est.3c03725 <-- shared paper
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#GIS #spatial #mapping #waterquality #particulate #porewaterexchange #radiumisotopes #eutrophication #Australia #GreatBarrierReef #pollution #runoff #fertilisers #farming #agriculture #UN #WorldHeritageSite #spatialanalysis #fateandtransport #model #modeling #water #waterchemistry #chemistry #research #ecosystems #marine #groundwater #nitrogen #phosphorous #reef #coralreef #reefhealth #climatechange #bleaching #coral #rivers #submarine #discharge #ecosystem

How the chemistry of rock #glaciers influences #WaterChemistry.

A 2023 paper from #CriticalZone Network #Dustˆ2 Cluster member @jmunroe and Alexander L. Handwerger.

"Results underscore the role of rock glaciers as an agent influencing the #hydrochemistry of water in high-elevation stream #systems."

#ScienceCommunication

📖🔗: https://bit.ly/3Q355bi

Today I taught water chemistry to the UNSW "Earth's Systems and Sustainability" class. We cover Earth Science and it's role in sustainable development.

It is the one day in the year where I buy a bottle of water, and ask the class to do the same (not susat in nable, I know). We use the water chemistry on the labels to understand the relationship between chemistry and the water source.

And we cover the unsustainability of the bottled water industry, and its impacts on meeting the Sustainable Development Goal 6 (clean water and sanitation).

This year that was made easier by a UN report released two weeks ago, and summarized here:

https://theconversation.com/how-the-bottled-water-industry-is-masking-the-global-water-crisis-201756

This is a global league table you do not want to be top of, and Australia is second worst globally, and the Asia-Pacific the largest users of bottled water. Time to do better....

#water #groundwater #sustainability #SDG6 #SustainableDevelopmentGoals #science #earthscience #waterchemistry #academia #HigherEd #unsw #scicomm #bottledwater
@unsw

Hi, my name is Lucy, and I recently completed my master's degree in #geosciences at #tugraz and will soon start my PhD. My previous project was a one-year investigation of lake #waterchemistry and chalk deposition at the #Weissensee freshwater lake in Carinthia (#Austria). I am interested in water and #elementalcycles, #mineralformation, #oceanography and the effects of #climatechange.

#Introduction #womeninSTEM #scicomm #Hydrogeochemistry #geology