⏰ 1 day left to save on conference registration for #GWM2 at Princeton! Early bird pricing ends May 15th — short course registration is also open at regular pricing. Don't wait! igwmc.princeton.edu/groundwater-... @reedh2o.bsky.social

#GWM2 Mini Conference Highlight: 12th International Conference on the Analytic Element Method Learn about pricing, registration, and more: igwmc.princeton.edu/groundwater-... #Groundwater #Hydrology @reedh2o.bsky.social

#GWM2 Short Course Highlight: Integrated Simulation Of Watershed Systems Using ParFlow and Subsetting Using HydroFrame and Hydrodata: ParFlow Short Course Extension For more: igwmc.princeton.edu/groundwater-... #Groundwater #Hydrology @reedh2o.bsky.social

💧 Led by Princeton's @reedh2o.bsky.social and @uarizona.bsky.social's Laura Condon, a new, highly-detailed map shows how much groundwater lies beneath our feet throughout the United States.

It was awesome talking with Ian about our recent work modeling groundwater and estimating freshwater over the US.

How much water lies beneath our feet? After years of research, scientists have an answer, and a detailed national map of groundwater. I spoke with @reedh2o.bsky.social of @princeton.edu and Laura Condon of @uarizona.bsky.social about their fascinating research: www.latimes.com/environment/...

Thanks for the shout out!

Abstracts are hard. We get it. 😅 Plot twist: 1 more week! 🎉 New deadline: March 10, 11:59pm EST Don’t let your idea be the one that got away — submit for #GWM2: igwmc.princeton.edu/groundwater-... #Groundwater #Hydrology @reedh2o.bsky.social

Registration opens next week for #GWM2 Conference & Short Courses! 💧 Explore this year’s offerings and strengthen your groundwater modeling skills. For more details: igwmc.princeton.edu/groundwater-... #Groundwater #Hydrology #Modeling @reedh2o.bsky.social

⏰ 3 weeks left to submit abstracts for Groundwater Modeling and More 2026: From Raindrop to Reservoir! 📍 Princeton University | June 7–10, 2026 🗓️ Abstracts close March 3, 2026 (5pm EST) 🔗 igwmc.princeton.edu/groundwater-... #GWM2 @reedh2o.bsky.social

"You always think the closest water is like a lake or a river or stream, but the closest water is beneath your feet." Princeton's @reedh2o.bsky.social talks about new research that maps out groundwater below the surface — a vital tool during times of drought.

If surface water is our checking account and groundwater is our all-important savings account, "we don’t know how much is in our savings account,” said @reedh2o.bsky.social. Now, he and his colleagues have developed an estimate. eos.org/articles/rep...

That’s 13 times the volume of all the Great Lakes combined. eos.org/articles/rep...

Abstract submission is now open for Groundwater Modeling and More 2026: From Raindrop to Reservoir. 📍 Princeton University | June 7–10, 2026 🗓️ Deadline: March 3, 2026 (5pm EST) 🔗 event.fourwaves.com/gmm26/pages @reedh2o.bsky.social

For all we know about the planet, we still don't really know how much freshwater we have. Surface water? About 1% of the total. The rest is groundwater — varying wildly over short distances, poorly observed, hard to model.

🎲🌋 Games for Geoscience at #EGU26! Session EOS1.3 highlights games and gamified approaches to geoscience teaching and learning. Abstract submissions close Jan 15 — submit yours today! 🔗 games4geoscience.wordpress.com/egu-games-day/ @reedh2o.bsky.social @egu.eu

AGU 25 — IGWMC edition 🌎 Posters, talks, #hydrology, #machinelearning, community, and lots of great conversations. So grateful for everyone who made this week what it was. Already looking ahead to doing it all again at AGU 26! #AGU25 @reedh2o.bsky.social @agu.org

Save the date! 📅 Join us for Groundwater Modeling and More 2026: From Raindrop to Reservoir, June 7–10, 2026 at Princeton University. A refreshed name, new formats, and longstanding traditions. More details coming soon! @reedh2o.bsky.social

Thanks so much for entrusting me to kick off #USRSE25! What a great conference and a super engaged audience. So much fun

What’s an aquifer? It’s layers of rock or sediment that hold and move water underground —like a hidden reservoir beneath our feet. We demo this with both a physical & virtual model for outreach events. Curious? Ask us more! #Groundwater #Hydrology @reedh2o.bsky.social

💧 Water science has a language all its own. Here’s a quick look at some essential hydrology terms—perfect for students, educators, and water nerds alike. #Hydrology #WaterScience 🔁 Repost to help folks learn the lingo! @reedh2o.bsky.social

💧 #FunFactFriday 💧 Billions of people rely on groundwater every day—but most don’t even know it! 💧🌍 Do you know where your water comes from? 👇 #WaterFacts #Hydrology @reedh2o.bsky.social

Discussions are beginning around a possible MODFLOW & More Conference in 2026.💧We’d love your input as we consider options. Please take a few minutes to complete our short survey: igwmc.princeton.edu/modflow-2026... Also, check out 2024 highlights + past short course info @reedh2o.bsky.social

IGWMC led a hydrology unit for QUEST teachers last week! 💧 Participants learned how Earth’s water is distributed through the #Freshwater #Saltwater Challenge, then used #aquifer models to explore groundwater flow and aquifer types. @reedh2o.bsky.social

Students took on Water and Climate Week at @thewatershedinstitute —exploring #hydrology, #modeling, #ML, #coastalhydrology & #SciComm. The week ended with climate art inspired by places they love. @reedh2o.bsky.social

Ever wondered how hydrologists observe water movement over time? A hydrograph shows streamflow changes from rain, snowmelt, and more. We use them to study floods, seasonality, and how water moves through landscapes. #Hydrology #Groundwater #Hydrograph @reedh2o.bsky.social

As groundwater flows through layers of soil and rock, those materials help filter out impurities. 💧⏳ That’s why water from aquifers often needs less treatment than surface water. What’s a cool science fact you love? Drop it below! ⬇️ #FunFactFriday #WaterScience @reedh2o.bsky.social

We were so excited to be invited to facilitate Mole Day at Foundations Academy Charter School on June 2! Students explored water science through aquifer models, crafting water cycle bracelets, and taking the freshwater challenge.💧 #STEM #WaterEducation #MoleDay @reedh2o.bsky.social

US climate scientists need all the help they can get. Including from foul-mouthed comedians! 🤡😱😱 Watch Emmy Award-Winning David Cross team up with Prof Michael Oppenheimer in the US launch of the hit series "Climate Science Translated". #climate #arresteddevelopment #climatescience

We’re sending a big congratulations to 3 graduating undergrads from PU’s Class of 2025! 🎓These 3 have done great work with HMEI and the IGWMC. 👩‍🔬Ashley DeFrates 🌍Brooke Beers 💧 David van Velden We can’t wait to see what’s next! #Princeton25 #Research @acee.princeton.edu ‬ @reedh2o.bsky.social

📢 Registration is now OPEN for IGWMC’s Summer 2025 Short Courses! We’re offering hands-on sessions in groundwater modeling, hydrologic systems, and open-source tools. Register here: princeton.irisregistration.com/Form/Short25 @reedh2o.bsky.social #groundwater #hydrology #training

A study in Communications Earth & Environment finds that snowmelt runoff in the western US is composed primarily of older groundwater, dating back 5.7 years on average. go.nature.com/4iXF5ZX ⚒️ 🧪

Ever wondered how groundwater moves? Our physical sandtank models show it firsthand at outreach events! 💧 Plus, the ParFlow Sandtank lets you explore these processes online—adjust flow, contamination, & more in real time! sandtank.hydroframe.org #Hydrology @reedh2o.bsky.social

We're co-hosting the 2025 Kimberly-Clark Distinguished Lecture! 🗓 May 16 | 🕥 10:30AM 📍 E225, EQuad Prof. Rainer Helmig (U. of Stuttgart) “Porous Media Free-Flow Coupling – From REV to Pore Scale and Back” #PorousMedia #Hydrology #Groundwater @reedh2o.bsky.social

📣 IGWMC’s Summer 2025 short courses are in the works! We’re offering sessions on modeling, hydrologic systems, & more. The interest form will remain open until registration is live—stay tuned. 🔗 igwmc.princeton.edu/events/short... #groundwater #hydrology #training @reedh2o.bsky.social

Some groundwater fluoresces under UV light thanks to a variety of organic compounds, like humic acids! 💡💧 Know a wild science fact? Drop it below! ⬇️ #FunFactFriday #WaterScience @reedh2o.bsky.social

🎉 It’s game day! The Games for Geoscience session is happening today at #EGU25! 🎲 Come explore how games, gamification, and immersive technologies are transforming outreach, research & education in the geosciences. #Games4Geo #EGU25 #SciComm #GamifyLearning @egu.eu @reedh2o.bsky.social

Thanks for the highlight, @kinarnicholas.bsky.social! Honored for this work to be the hydro paper of the day.

🕹️ Game on! From VR to board games, explore how play powers science during Games for Geoscience at #EGU25 🎲 Discover how game-based learning boosts comprehension, resilience, and engagement. #SciComm #Games4Geo #Education @egu.eu @reedh2o.bsky.social

🚨IGWMC at #EGU25!🚨 From deep learning to disaster recovery, we're showing work on groundwater science all week long 🌍💧 Come support our researchers & collaborators presenting throughout EGU 🧵👇 #Hydrology @egu.eu @reedh2o.bsky.social

This Arbor Day, shout out to trees for powering the water cycle! 🌳 Through evapotranspiration, they move water from soil to sky, shaping local climate and rainfall. Hydrology isn’t just rivers—it’s forests too! 💧☁️ #ArborDay #Hydrology #WaterCycle #Evapotranspiration @reedh2o.bsky.social

🎲 Games spark imagination and shift perspectives—perfect for science communication, teaching, and resilience-building 🌍 Join Games for Geoscience at #EGU25 to explore how play is reshaping outreach, research & education! #Games4Geo #SciComm #Education @egu.eu

Flashback to Water and Climate Academy week! 🌊 Students explored how water science connects to climate change—diving into hydrological topics—then shared insights through science communication. @reedh2o.bsky.social #FlashbackFriday #Hydrology #MachineLearning #SciComm #ClimateChange

Spring Into Science 2025 was a blast! 🔬💧 Students explored aquifer models, our density tank & met Jerome the Drone 🚁. Great to see young scientists dive into water sustainability! 💙 #SpringIntoScience #Hydrology #STEM @reedh2o.bsky.social

Some groundwater is under so much pressure that it flows to the surface without the need for pumping! 🌊 What’s a surprising water fact you know? Tell us below! ⬇️ #FunFactFriday #WaterCycle @reedh2o.bsky.social

The fact that my awesome group is excited to teach kids about water makes me so happy. Hope this brightens your feed. #maxwellgroupadventures

You can get my book even though it still says "pre-order"! press.princeton.edu/books/paperb... (for a 30% discount, use code P327 on the PU Press website)!

🌍💧 Happy #WorldWaterDay! Glaciers store & slowly release water, feeding rivers & groundwater. But rapid melting disrupts this balance, threatening water supplies. Protecting these icy lifelines secures our future! #GlacierPreservation #Groundwater @reedh2o.bsky.social @un-water.bsky.social

#FlashbackFriday to Spring Into Science 2024! 💧🔬 Students explored aquifer models, a density tank & met Jerome the Drone 🚁. Come see us for Spring Into Science 2025 on April 5! #STEM #Outreach @reedh2o.bsky.social Sign up: scienceoutreach.princeton.edu/events/2025/...

How do disasters shape learning?🌏 A decade after Super Typhoon Haiyan, this study analyzed 15K+ news articles, 300 papers & survivor stories to understand recovery & resilience. @reedh2o.bsky.social #DisasterRecovery #Resilience #RiskComms www.nature.com/articles/s44...