George H. Allen
@geoallen.bsky.social
Hydrologist and satellite enthusiast. Associate Professor at Virginia Tech
🚨Job Alert!🚨 I'm recruiting a postdoc starting Fall '26 or Spr '27 focused on: (1) Satellite remote sensing of inland surface water (2) Hydrologic applications of geospatial foundation models, LSTMs, or other AI/ML approaches. If you're interested, DM me or fill out this form: lnkd.in/gf3fMmx8
We will convene our long-running #AGU session this fall: Remote Sensing of Rivers, Lakes and Wetlands. Consider submitting an abstract! Invited presenters: Dongmei Feng (U of Cincinnati) and Lian Feng (Wuhan U) Conveners: George Allen, Huilin Gao, Jessica Fayne, Ted Langhorst, Anshul Yadav
Q: How much do dams alter river temperatures in the US? A: Quite a lot, according to Landsat data Check out our new paper in Science Advances: Satellite observations reveal widespread alteration of river thermal regimes by US dams doi.org/10.1126/scia...
So grateful and excited to officially have NSF support to investigate how cryptic and/or chemosynthetic carbon contributes to stream productivity! Here's our upcoming work: amandadelvecchia.weebly.com/lab-news AND an amazing PhD student opportunity 😀 amandadelvecchia.weebly.com/join-the-lab...
A great figure can elevate your paper, increase scientific accessibility, and even become art. Are you an early career researcher in hydrology with a (published) figure that you are proud of? H3S wants to spotlight you! Submissions accepted here → docs.google.com/forms/d/e/1F...
A new study published in GSA Today is changing the way scientists answer that question—using data from NASA’s SWOT satellite to track how rivers erode, transport sediment, and reshape landscapes across Earth. Read the paper: geosociety.co/Stroud_et_al #NASA #RemoteSensing #Geomorphology
This is an incredible documentation of the systematic, intentional collapse of American health science, by Elizabeth Ginexi. open.substack.com/pub/elizabet...
I Wrote Research Funding Announcements for NIH for 22 Years. This Year They’ve Published 14
How NIH went from 756 funding announcements to 14 in two years — and what it means for every disease that depends on federal research
open.substack.com
Hydrology Paper of the Day @geoallen.bsky.social on distinguishing between lakes and reservoirs by SWOT observations: estimating storage by the LakeFlow algorithm; statistical tests for differences; characterizing variability; and understanding reservoir inflows and outflows.
George H. Allen@geoallen.bsky.social · 7mo agoOur new paper uses #SWOT_satellite data to differentiate between natural & managed lake dynamics across North America. We find that inflows & outflows of managed lakes are significantly more variable than natural lakes, revealing signatures of reservoir operations: doi.org/10.1088/1748...
Our new paper uses #SWOT_satellite data to differentiate between natural & managed lake dynamics across North America. We find that inflows & outflows of managed lakes are significantly more variable than natural lakes, revealing signatures of reservoir operations: doi.org/10.1088/1748...
New paper by Katie McQuillan leverages satellite radar to map lake evaporation at 25× finer resolution than operational surface analysis products, opening up applications from improved gauge placement to evaluating geoengineering strategies doi.org/10.1109/LGRS...
New paper is featured on the cover of GSA Today 🥳 We show that the #SWOT satellites's radar observations are a valuable new source of data for studying river processes/ fluvial geomorphology. Led by Molly Stroud @mollystroud.bsky.social @vt-science.bsky.social Paper: doi.org/10.1130/GSAT...
The Geological Society of America (GSA)@geosociety.bsky.social · 9mo agoThe December issue of GSA Today is full of innovative ideas in the geosciences! • Learn about how NASA's SWOT satellite is revolutionizing fluvial geomorphology. • Tag along on a college hydrogeology field course. • And so much more! 🌎 Read the newest issue here: geosociety.co/GSATDec25 #GSAToday
Time to get your public comments in on the proposed Waters of the U.S. rule that would strip protections for countless wetlands and streams. Trout unlimited has a tool on their page that will automatically send your message to the EPA as well as your representatives: www.tu.org/conservation...
Take Action - Trout Unlimited
It only takes a minute to stand up for clean water and healthy fisheries.
tu.org
American Rivers@americanrivers.bsky.social · 10mo agoThe EPA's new proposed definition of the WOTUS provision of the Clean Water Act, as written currently, would dramatically reduce the reasonable science-based protections for our nation's wetlands, streams, lakes, and rivers. Read our statement: www.americanrivers.org/media-item/a...
Grad students in my group participate in the 2025 Flip the Fair science fair and research expo in Salem Virginia
Flip the Fair 2025 Inspired Young Minds and Future Scientists from Roanoke City Public Schools
Nov. 5, 2025. Flip the Fair celebrated its fourth year this fall, continuing the tradition that began in 2022. This event invited fifth grade students from Roanoke City Public Schools to step into the...
communicatingscience.isce.vt.edu
This weekend my research group volunteered at the Claytor Lake Mussel Salvage event near Blacksburg, VA. We surveyed and relocated hundreds of native mussels during the scheduled biennial lake drawdown. #UtProsim @vtgeosciences.bsky.social @vt-science.bsky.social
Join the Global Flood Partnership (GFP) 2025 Fall Webinar Series! On November 19, 2025 (16:00 CET), we bring you three expert talks on how Earth-Observation data is transforming flood mapping, risk assessment, and resilience strategies. Register here: lnkd.in/gjYX3GV8 See also: lnkd.in/gRQFuk_J
27 things we wish we’d known when we started our PhDs Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
27 things we wish we’d known when we started our PhDs
Nature - Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
nature.com
We’re on Capitol Hill with 225 Earth & space scientists — including @aas.org and @planetarysociety.bsky.social — urging Congress to reopen the government and protect NASA science. 🚀🌍 Join us: buff.ly/a3YuGgY #ScienceIsEssential #AGU
First NISAR L-band images released! They look great! www.jpl.nasa.gov/news/nasa-is...
NASA-ISRO Satellite Sends First Radar Images of Earth’s Surface
Preliminary images from the most powerful Earth radar satellite ever launched offer a tantalizing glimpse of the science the mission will be able to deliver.
jpl.nasa.gov
Looking for a postdoc, and interested in river-coastal linkages, #remote sensing, and time series analysis? Come work with us @natureatcal.bsky.social on an exciting project led by @rachelspatial.bsky.social! CC @sfs-src.bsky.social @aslo.org @cerfscience.bsky.social @caseagrant.bsky.social
Rachel Carlson@rachelspatial.bsky.social · 12mo agoWe're hiring! My lab is seeking a 2-yr Postdoc in 🌊 marine ecology + 🛰️ remote sensing. You'll work with a big team (including @albertruhi.bsky.social @cgerleinsafdi.bsky.social) to study the impacts of changing rainfall on marine freshwater plumes + coastal organisms. aprecruit.berkeley.edu/JPF05114
Hello freshwater friends! I’m starting a lab(!!) and recruiting 2 students to start Fall 2026 and a lab/field assistant to start this Fall 2025! Research topic is broad: rivers 🛶, ice/snow ❄️, nutrients 🍂, algae 🌱see below for more info Please pass this along to any interested folks :)
Flood waves like those that devastated Texas last week can be seen by the NASA #SWOT satellite. Another reason to support #NASA Earth Science
George H. Allen@geoallen.bsky.social · last yr.Hydrologists! Ever heard of a Spatial Hydrograph? Our new paper in @agu.org GRL shows that the SWOT satellite can capture spatial flow waves propagating down rivers—something previously only only observable at river gauges: doi.org/10.1029/2024... #SWOT #hydrology #RemoteSensing #EarthObservation
AGU H3S invites you to submit an abstract to our session at #AGU25 Thinking Outside the Box Plot: Communicating Science Beyond the Paper! The session explores creative ways to communicate research. Conveners: @adischner.bsky.social @acarneiromar.bsky.social @gescilam.bsky.social Cee Nell Emily Ellis
AGU H3S invites you to contribute to our session at #AGU25 Hydrology Student, Postdoc, and Early Career Flash Talks! This session highlights research performed by fellow Early Career Researchers within the field of Hydrology. Conveners: Matthew Preisser and Kathryn Moore
🚨New paper🚨 shows a remarkably clean relationship between river width and stream order across the US 𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025... #hydrology #geomorphology #rivers #RemoteSensing
Hana (grad student in my group) will be doing a research internship at JPL this summer. Here she is on her first day on the job. Good luck, Hana!! 🚀🚀🚀
NASA news article on our recent study on the #SWOT satellite's ability to capture hydrologic flow waves in rivers Link to paper: doi.org/10.1029/2024GL113875
NASA-French Satellite Spots Large-Scale River Waves for First Time - NASA
In a first, researchers from NASA and Virginia Tech used satellite data to measure the height and speed of potentially hazardous flood waves traveling down
nasa.gov
🌐 Introducing GRIT: the First Global Bifurcating River Network 🏞 developed by Michel Wortmann as part of the NERC Large Grant EvoFLOOD, in the Hydro-Climate Extremes group @oxfordgeography.bsky.social
Hydrologists! Ever heard of a Spatial Hydrograph? Our new paper in @agu.org GRL shows that the SWOT satellite can capture spatial flow waves propagating down rivers—something previously only only observable at river gauges: doi.org/10.1029/2024... #SWOT #hydrology #RemoteSensing #EarthObservation
Delighted to see our @NERCscience @EvoFlood project research on changing flood hazard and risk profiled by @theAGU 💜 @lborouniversity eos.org/research-spo...
