Integrated GroundWater Modeling Center

An abstract reminder promotional graphic on a dusky blue background. The event title, “Groundwater Modeling and More: From Raindrop to Reservoir,” appears in the top right next to a small drone photo of a mountain landscape, with #GWM² in the top left. Beneath the title, the text reads, “Three more weeks to go! Submit your abstract today!”followed by the date “Tuesday, March 3, 2026 at 5:00 PM EST.” To the right is a QR code linking to the abstract submission page, followed by the abstract submission URL. In the bottom right corner is the conference logo. To the left of the logo is another QR code linking to the main conference website, with the website URL displayed below it. Along the bottom center, the text reads, “Questions? Reach out to us at igwmc@princeton.edu.”

⏰ 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

Call for abstract promotional graphics on a white background. The event title reads “Groundwater Modeling and More: From Raindrop to Reservoir,” followed by the dates “June 7 - June 10, 2026”. A thin blue line appears underneath that. The text “Call for Abstracts!” followed by the link to abstract submission, the text “Open January 20th Close: March 3rd” and the location “Princeton University, Princeton, New Jersey.” A second thin blue line appears below the text, with the “Integrated GroundWater Modeling Center” centered under the line and the IGWMC logo under that.

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

A digital graphic with a teal background featuring the text “Where Science Connects Us” and the AGU25 logo at the top. A dark blue wavy line runs horizontally across the design behind a photo of a diverse group of smiling people standing in front of an AGU backdrop, with a white AGU sign placed on the ground in front of them. Below the photo, the IGWMC logo and the Princeton University shield logo appear in the bottom left corner.

A 12-photo collage highlighting poster presentations, conversations, and virtual research displays.

An eight-photo collage highlighting oral presentations, set on a teal background. Dark blue squiggly lines intersect and weave between several of the photos, which show presenters speaking and engaging with audiences during oral presentation sessions.

A four-photo collage on a teal background with two dark blue squiggly lines at the top and bottom. The images include a two-tone blue AGU sign, two photos from a group dinner, and a playful group photo at the bottom showing a sillier moment.

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

🎲🌋 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

Save the Date promotional graphic on a white background. At the top, the text “Save the Date!” appears with a thin blue line beneath it. Below, the event title reads “Groundwater Modeling and More: From Raindrop to Reservoir,” followed by the dates “Sunday June 7 to Wednesday June 10, 2026” and the location “Princeton University, Princeton, New Jersey.” A second thin blue line appears below the text, with the IGWMC logo centered at the bottom.

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

Graphic featuring an AGU25 conference schedule for Thursday 12/18 overlaid on a purple background with a decorative squiggly line. On the top, there is a photograph of two women who appear to be studying from a book and laughing outdoors at a wooden table. Presentation listings include times, room numbers, and poster hall designations. A QR code appears in the bottom right corner of the photograph. The AGU25 logo with the text ‘Where Science Connects Us’ is placed at the bottom left.

Here’s the schedule for tomorrow’s sessions (12/18) at #AGU25— don’t miss the IGWMC researchers sharing their work tomorrow! See you there for another exciting day!
#Geoscience #AGU2025 #EarthScience #ClimateAction #AGU @reedh2o.bsky.social @agu.org

Graphic featuring an AGU25 conference schedule for Wednesday 12/17 overlaid on a teal background with a decorative squiggly line. On the left, there is a photograph of a person in a red coat holding a large translucent research balloon in a snowy landscape. Presentation listings include times, room numbers, and poster hall designations. A QR code appears in the bottom left corner. The AGU25 logo with the text ‘Where Science Connects Us’ is placed at the bottom right.

Here’s the schedule for tomorrow’s sessions (12/17) at #AGU25— don’t miss the IGWMC researchers sharing their work tomorrow! See you there for another exciting day!
#Geoscience #AGU2025 #EarthScience #ClimateAction #AGU @reedh2o.bsky.social @agu.org

Graphic featuring an AGU25 conference schedule for Tuesday 12/16 overlaid on a green background with a decorative squiggly line. On the top, there is a photograph of a person looking up in a sandy landscape. Presentation listings include times, room numbers, and poster hall designations. A QR code appears in the bottom right corner of the photograph. The AGU25 logo with the text ‘Where Science Connects Us’ is placed at the bottom left.

Here’s the schedule for tomorrow’s sessions (12/16) at #AGU25— don’t miss the IGWMC researchers sharing their work tomorrow! See you there for another exciting day!
#Geoscience #AGU2025 #EarthScience #ClimateAction #AGU @reedh2o.bsky.social @agu.org

Graphic featuring an AGU25 conference schedule for Monday 12/15 overlaid on a teal background with a decorative squiggly line. On the left, there is a photograph of a person in a red coat holding a large translucent research balloon in a snowy landscape. Presentation listings include times, room numbers, and poster hall designations. A QR code appears in the bottom left corner. The AGU25 logo with the text ‘Where Science Connects Us’ is placed at the bottom right.

Graphic featuring an AGU25 conference schedule for Monday 12/15 overlaid on a teal background with a decorative squiggly line. On the left, there is a photograph of a person in a red coat holding a large translucent research balloon in a snowy landscape. Presentation listings include times, room numbers, and poster hall designations. A QR code appears in the bottom left corner. The AGU25 logo with the text ‘Where Science Connects Us’ is placed at the bottom right.

Here’s the schedule for tomorrow’s sessions (12/15) at #AGU25— don’t miss the IGWMC researchers sharing their work tomorrow!
#Geoscience #AGU2025 #EarthScience #ClimateAction #AGU @reedh2o.bsky.social @agu.org

Graphic for AGU25 conference schedule with a green background and dark green squiggly line across the top. The heading reads ‘AGU25.’ Below are presentation listings for Monday 12/15 through Thursday 12/18 with speaker names, times, and titles. A QR code is displayed on the right side of the schedule.

Our team is excited to share our #AGU25 presentation schedule! Check out when we’re presenting next week and stop by to learn more about our research. Use the QR code for more info #Research #IGWMC #ScienceInAction #Hydrology #ScienceEducation @reedh2o.bsky.social @agu.org

A purple background graphic featuring a professional headshot of Cathy Wang. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Cathy Wang.” Centered under the headshot is a description: “Cathy Yingcan Wang is a 4th year PhD candidate from the Department of Civil and Environmental Engineering and the Integrated GroundWater Modeling Center at Princeton University. Cathy is interested in understanding hydrogeochemical processes in the variably saturated subsurface. Her recent research project aims to develop a scalable, physically-based framework to quantify stream and groundwater vulnerability to contaminants, leveraging integrated hydrologic and Lagrangian particle-tracking models.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Xiao Xia Liang. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Xiao Xia Liang.” Centered under the headshot is a description: “Xiao Xia Liang is a postdoctoral researcher at Princeton University, where she integrates machine learning, geostatistical, and geophysical approaches to advance the understanding of groundwater systems. Her research bridges data science, geoscience, and physics, aiming to improve our understanding of hydrogeological processes and support the sustainable management of water resources.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Mohammad Afzal Shabad. A wavy green line runs across the top. Below it, the text reads “Cryosphere and Hydrology” and “Mohammad Afzal Shabad.” Centered under the headshot is a description: “Dr. Mohammad Afzal Shadab is a Future Faculty in Physical Sciences Postdoctoral Fellow at the Integrated GroundWater Modeling Center, Princeton University. His research focuses on integrated hydrologic modeling across terrestrial, cryospheric, planetary, and energy-related systems. He currently serves as Chair of the U.S. Association of Polar Early Career Scientists and as an Executive Committee Member of the AGU Cryosphere Science Section.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Louisa Pawusch. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Louisa Pawusch.” Centered under the headshot is a description: “​​Louisa Pawusch is a first-year graduate student in the Maxwell group, where she works on machine learning and large-scale hydrological simulation. Last year, she joined the group as a visiting student while completing her master’s thesis, where she focused on the integration of data-driven methods to speed up the initialization of hydrologic simulations.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Amelia (Mia) Peeples. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Amelia (Mia) Peeples.” Centered under the headshot is a description: “​​Amelia (Mia) Peeples is a PhD candidate in the Maxwell group at Princeton University. She uses subgrid parameterizations and machine learning to represent subgrid heterogeneity with the goal to improve the local accuracy of surface water in large-scale hydrologic models.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Nick Jadallah. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Nick Jadallah.” Centered under the headshot is a description: “​​Nick is a 5th-year PhD candidate studying hydrology. He uses integrated hydrologic modeling to explore the impacts of climate change and water management on the Upper Colorado River basin. In his free time, you can find Nick running, hiking, climbing, or cheering on his favorite team: The SF Giants.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Yousef Kassam. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Yousef Kassam.” Centered under the headshot is a description: “​​Yousef Kassem is an undergraduate researcher from Princeton’s Computer Science department working with the Maxwell Lab’s HydroGEN project. His summer research applies ensemble machine learning techniques to improve groundwater modeling and develops an educational module to help students understand and use Machine Learning in real-world settings.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Marie Joe Sawma. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Marie Joe Sawma.” Centered under the headshot is a description: “Marie Joe Sawma is a second-year PhD student in Civil and Environmental Engineering at Princeton University. Over the past year, she has focused on advancing parameter inference for integrated hydrologic models, developing a framework that enables efficient, likelihood-free estimation of key hydrologic parameters. This research has strengthened her skills in hydrologic model calibration, uncertainty quantification, and large-scale parameter inference.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Maria Fleury. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Maria Fleury.” Centered under the headshot is a description: “Maria Fleury is a second-year graduate student in the Maxwell group. Over the past year and a half, she has been developing a random forest model to estimate water table depth over Brazil and helping facilitate collaborations with other scholars studying groundwater in her home county.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Jasmine Pinchinat. A wavy green line runs across the top. Below it, the text reads “Education” and “Jasmine Pinchinat.” Centered under the headshot is a description: “Jasmine Pinchinat serves as the Community Organizer for the Integrated GroundWater Modeling Center. Over the past two summers, she conducted a variety of pre- and post-evaluation strategies, gaining valuable experience in assessing the effectiveness of an annual educational program.” To the left of the text is the AGU logo, and to the right is a QR code.

A purple background graphic featuring a professional headshot of Harry Stone. A wavy green line runs across the top. Below it, the text reads “Hydrology” and “Harry Stone.” Centered under the headshot is a description: “Harry Stone is a 4th year graduate student in Professor Maxwell's group. His research interests revolve around catchment scale hydrology through a combination of field work, drone analysis, and hydrologic modeling. Specifically, he focuses on Colorado River issues and evaluating the impacts of warming on hillslope water usage.” To the left of the text is the AGU logo, and to the right is a QR code.

A digital promotional graphic on a teal background displaying the text “WHERE SCIENCE CONNECTS US,” the Integrated GroundWater Modeling Center (IGWMC) logo, and “at AGU25.” A dark blue wavy line stretches horizontally across the design. Below, it reads “One more week until #AGU25! Let’s learn about our presenters!” The bottom left features the Princeton University shield logo.

Less than one week until #AGU25 kicks off! The IGWMC is proud to have some amazing researchers attending this year. Click through the thread to meet them and learn more about the groundbreaking work they’re doing! #Research #IGWMC #ScienceInAction #Hydrology #ScienceEducation @reedh2o.bsky.social

Illustration of the water cycle titled “The Water Cycle: Water’s Journey.” The diagram shows the sun shining over the ocean and land. Arrows label key processes: “Evaporation” rising from the ocean, “Condensation” forming clouds, “Precipitation” falling as rain over trees, “Transpiration” from the trees, “Runoff” flowing from land to the ocean, and “Infiltration” moving water into the ground. The scene includes the ocean, a beach, soil layers, and a forest.

💧The water cycle is more than just evaporation, condensation, and precipitation. Add runoff, transpiration, infiltration—and that’s still not all! Hydrology gets deep—literally. #WaterCycle #Hydrology @reedh2o.bsky.social

A light blue square graphic with bold black text at the top reading ‘Fun Fact Friday with the Integrated GroundWater Modeling Center.’ Below, the IGWMC logo features stylized blue and black text with a wave design. A white rounded rectangle contains bold black text saying ‘DID YOU KNOW?’ followed by a fact in smaller black font ‘Deep-rooted plants, like mesquite trees, tap directly into groundwater at the water table with root systems that can reach depths of up to 70 meters! This ability allows them to survive extended dry seasons without rainfall.’

💧 #FunFactFriday 💧
Some deep-rooted plants survive dry seasons by sipping straight from the water table, even sharing water with shallow-rooted neighbors along the way! 🌱💧 Know any deep-rooted species near you? 👇 #WaterFacts #Hydrology @reedh2o.bsky.social

Graphic titled "What is an Aquifer?" with a stick figure shrugging and question marks above its head. Text explains that an aquifer is a body of rock or sediment that contains and transmits groundwater, acting as an underground reservoir. Images include a screenshot of the virtual ParFlow Sandtank and a group of teachers working with a physical aquifer model. Logo of the Integrated GroundWater Modeling Center at the bottom.

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

Yousef Kassem ’27 stands at the front of a conference room presenting a slide titled “Research question” to an audience seated around a long table.

Nathan Kang ’28 points to a slide showing four colorful data plots labeled “Results” while presenting to an audience in a conference room.

We were grateful to host 2 interns this summer through HMEI’s Environmental Internship program! 🎉 They joined 100+ Princeton students last Friday to present their summer work at the Summer of Learning Symposium. Congrats to all! @reedh2o.bsky.social

A graphic with four blue boxes surrounding a central white circle that says "Let's Learn Some Hydrology Lingo." Each box contains a hydrology-related term and its definition: Top left: "Evapotranspiration – The process by which water is transferred from land to the atmosphere through evaporation, the conversion of liquid water to vapor from soil and surfaces, and transpiration, the release of water vapor from plants." Top right: "Precipitation – Water that falls from the atmosphere to earth’s surface as a liquid or solid." Bottom left: "Runoff – A portion of water from precipitation that does not infiltrate into the ground and flows over the land surface, ending up in streams, rivers, or other surface waters." Bottom right: "Hydrology – The science of water which deals with the properties, distribution, and circulation of water on and below the earth's surface and in the atmosphere." At the bottom is the logo for the Integrated GroundWater Modeling Center (IGWMC).

💧 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

A light blue square graphic with bold black text at the top reading ‘Fun Fact Friday with the Integrated GroundWater Modeling Center.’ Below, the IGWMC logo features stylized blue and black text with a wave design. A white rounded rectangle contains bold black text saying ‘DID YOU KNOW?’ followed by a fact in smaller black font ‘Over 2 billion people worldwide rely on groundwater as their primary source of drinking water. This includes both urban and rural populations, and many major cities pump groundwater to meet public water supply needs.’

💧 #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

Promotional graphic with a blue curved border design. Text announces that the Organizing Committee has started planning discussions for a possible MODFLOW & More Conference in 2026 and invites people to complete a short survey to help guide early conversations. A central QR code links to the survey. Below, two additional QR codes provide access to highlights from 2024 and short course information. The bottom includes the IGWMC logo and the Princeton University shield.

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

A group sits at a table engaged in discussion on the distribution of saltwater and freshwater on earth. On the table are tall cups of blue liquid that are meant to represent the proportion of saltwater and freshwater on earth. PC: Jasmine Pinchinat / Community Organizer

A group gathers around a table, exploring freshwater distribution with stacks of LEGO bricks. Each stack represents the proportion of freshwater in different reservoir types, sparking discussion and engagement among participants. PC: Jasmine Pinchinat / Community Organizer

Three adults engage with a physical aquifer model demonstration. One woman injects dye into the tank to simulate contamination, while the other two observe the spreading dye and groundwater flow. PC: Jasmine Pinchinat / Community Organizer

Lisa Gallagher, Education and Outreach Specialist, stands at the front of a classroom instructing a group of teachers. The participants are seated and listening attentively, with presentation materials visible in the background. PC: Jasmine Pinchinat / Community Organizer

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