John Hammond
@hydrohammond.bsky.social
đ€ 1294
đ„ 1940
đ 51
Research hydrologist and river photographer. www.riversfromabove.com
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John Hammond
Philippe Papin
about 1 month ago
Just wanted to say that
@ologies.bsky.social
is one of my favorite podcasts I listen to with my wife & I was so happy she got a couple of rock âs in our field to talk about
#Hurricanes
etc. Just listened to parts 1 & 2. Both are great episodes & totally accessible to the general public. Bravo đ
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NPR
3 months ago
Several groups have mobilized to offer assistance to people affected by the Guadalupe River floods. via
@texaspublicradio.bsky.social
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Guadalupe River flood: How to help and how to find help
Several groups have mobilized to offer assistance to people affected by the Guadalupe River floods.
https://www.tpr.org/environment/2025-07-05/guadalupe-river-flood-how-to-help-and-how-to-find-help
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John Hammond
Larisa Tarasova
5 months ago
Very busy Thursday for the group at
#EGU25
âïžđđ€Ș
#floods
#droughts
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Quinn Millerâs MS work is now out!
onlinelibrary.wiley.com/doi/10.1002/...
5 months ago
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âGroundwater dominates snowmelt runoff and controls streamflow efficiency in the western United Statesâ
www.nature.com/articles/s43...
5 months ago
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âROBIN: Reference observatory of basins for international hydrological climate change detectionâ
www.nature.com/articles/s41...
5 months ago
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âWhat is a drought-to-flood transition? Pitfalls and recommendations for defining consecutive hydrological extreme eventsâ
egusphere.copernicus.org/preprints/20...
5 months ago
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StreamStats Delineations - Where are they? This figure shows the density of delineations per 25 square kilometer grid for all delineations over the period 3/16/24-3/15/25.
www.usgs.gov/media/images...
5 months ago
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John Hammond
Hilary McMillan
6 months ago
New paper! After much work by me and my students we created a global database of hundreds of research watersheds, and perceptual models of their hydrologic processes. We use the data to test classic theories on how climate and landscape control dominant processes.
www.nature.com/articles/s44...
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Global patterns in observed hydrologic processes - Nature Water
This study presents a global, searchable database of 400 research watersheds with published descriptions of dominant hydrologic flow pathways, supporting efficient hypothesis testing to investigate em...
https://www.nature.com/articles/s44221-025-00407-w
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John Hammond
Margaret Zimmer
6 months ago
Latest paper out of the WS hydrology lab! Here we show spatial variability in lithology is important for streamflow behavior and carbon export, but geogenic solute export behavior is similar.
agupubs.onlinelibrary.wiley.com/doi/full/10....
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The Role of Lithology on ConcentrationâDischarge Relationships and Carbon Export in Two Adjacent Headwater Catchments
Bedrock lithology drives differences in streamflow and carbon export in adjacent catchments, controlling variability in shallow flow paths Both catchments display similar in-stream major ion conc...
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024WR037086
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John Hammond
KinarNicholas.bsky.social
6 months ago
Hydrology Paper of the Day
@margaretzimmer.bsky.social
on how subsurface geology influences discharge and transport processes in two headwater catchments of the Diablo Range, California affected by wildfire: sedimentary and mélange lithologies, and understanding spatiotemporal DOC export.
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âGlobal patterns in observed hydrologic processesâ
@mcmillanhydro.bsky.social
@rarakihydro.bsky.social
@jansei.bsky.social
www.nature.com/articles/s44...
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Global patterns in observed hydrologic processes - Nature Water
This study presents a global, searchable database of 400 research watersheds with published descriptions of dominant hydrologic flow pathways, supporting efficient hypothesis testing to investigate em...
https://www.nature.com/articles/s44221-025-00407-w
6 months ago
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âLinking wetlands to relatively permanent flowing waters: a conterminous United States geospatial analysisâ - 79% or 66% of freshwater palustrine wetlands are potentially connected to the stream network, depending if inclusive,exclusive flow permanence network used
link.springer.com/article/10.1...
6 months ago
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âA low-cost approach to monitoring streamflow dynamics in small, headwater streams using timelapse imagery and a deep learning modelâ
egusphere.copernicus.org/preprints/20...
6 months ago
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Science! Super proud of this commentary that results from conversations started at
@agu.org
in December. We propose the term hydrological whiplash, sub-seasonal transitions between hydrological extremes, and outline why we think this topic needs greater attention.
doi.org/10.1002/hyp....
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Hydrological Whiplash: Highlighting the Need for Better Understanding and Quantification of SubâSeasonal Hydrological Extreme Transitions
Hydrological whiplash, or the sub-seasonal transition between hydrological extremes, has broad implications for water resource management, ecosystems, infrastructure, and human society. As this pheno...
https://doi.org/10.1002/hyp.70113
6 months ago
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John Hammond
Frederik Kratzert
6 months ago
New paper from our group about something we do for a while but never took the time to publish. What can you do with missing data in deep learning based hydro models? Also I want to boost
@gauchm.bsky.social
. Welcome to BlueSky! Link to preprint, code and results in his thread.
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John Hammond
UBC Geography
7 months ago
New research from our faculty Kate Hale (
@katehale.bsky.social
) and Vrije Universiteit Amsterdamâs Wouter Berghuijs shows how climate change affects river flows in snowy regions across the Northern Hemisphere. Learn more in the Nature publication:
www.nature.com/articles/s41...
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The snow drought in the southwest could lead to lower and earlier peak and low flows, a longer duration at low flow, and lower runoff efficiency:
www.tandfonline.com/doi/full/10....
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7 months ago
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-Climate change challenges traditional drought assessments -Reducing the sensitivity of drought indicators to non-stationarity is essential for accurately assessing drought -Multiple drought definitions or concepts are possible, and needed, to correctly assess drought in a changing climate
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Prioritization of Research on Drought Assessment in a Changing Climate
Climate change adds conceptual and quantitative challenges to traditional drought assessments Reducing the sensitivity of drought indicators to non-stationarity is essential for accurately assess...
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024EF005276
7 months ago
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John Hammond
Katharine Hayhoe
7 months ago
Great interview by
@climateadam.bsky.social
who never shies away from asking scientists the tough questions about how we FEEL âŹïž
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Katharine Hayhoe
7 months ago
@cleanetwork.bsky.social
welcome, so glad to see you here! I just added you to this starter pack, where you will find many kindred spirits.
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Stand Up for Science!
8 months ago
Welcome to the Bluesky account for Stand Up for Science 2025! Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone
#standupforscience2025
on March 7th, both in DC and locations nationwide!
#scienceforall
#sciencenotsilence
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John Hammond
Hilary McMillan
7 months ago
Amongst all of this, our students are still publishing excellent papers. My recent Masters student Annie Holt, now at NWS, shows how geologic age and (region-dependent) wetland fraction metrics can be used to improve our predictions of baseflow in watersheds across the U.S.:
doi.org/10.1002/hyp....
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New Predictors for Hydrologic Signatures: Wetlands and Geologic Age Across Continental Scales
This article contributes to the longstanding effort to use landscape metrics to predict streamflow dynamics. We introduce two new metrics describing wetlands and geologic age and use random forests t....
https://doi.org/10.1002/hyp.70080
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This!!!! The USGS just released the first National Water Availability Assessment report:
pubs.usgs.gov/publication/...
. Going to highlight some of my favorite figures after skimming the report and the corresponding
#USGSvizlab
sites
water.usgs.gov/vizlab/water...
for the first time in this thread.
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8 months ago
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John Hammond
Althea Archer
8 months ago
The U.S. Geological Survey (USGS) Vizlab has just released a new, interactive data visualization website about the USGS National Water Availability Assessment Report and Data Companion. Explore the data and the key findings of the assessment at
water.usgs.gov/vizlab/water...
#DataViz
#rstats
#USGS
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Learning about drought impacts for aquatic ecosystems in the Southeastern US over the next couple days, and presenting on the upcoming hydrological drought forecasting tool weâll be rolling out for the conterminous US later this year!
9 months ago
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Such a fun and brilliant group to work with! Thank you to Heather for leading us on this synthesis and Jay for leading our in person workshops and coordination efforts. Excited for the ongoing research this group is conducting :)
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9 months ago
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John Hammond
Christa Kelleher
9 months ago
A little bit delayed, but I hear it's picking up over here so sending this out into the world: our Lafayette team including Rachel Hurley (now grad student at WPI), Dave Brandes, and me put out this piece on flashiness across the Mid-Atlantic:
onlinelibrary.wiley.com/doi/abs/10.1...
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Drivers and Buffers of Stream Flashiness in the MidâAtlantic United States
In this study, we investigated flashiness across 195 Mid-Atlantic sites, each within one of seven different physiographic regions. Our findings identified several drivers and buffers of flashiness, e...
https://onlinelibrary.wiley.com/doi/abs/10.1002/hyp.15302
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John Hammond
Anne Jefferson
9 months ago
RIP Jimmy Carter. Thank you for this and so many other things.
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www.worldweatherattribution.org/when-risks-b...
âThis exceptional year of extreme weather shows how dangerous life has already become with 1.3°C of human-induced warming, and highlights the urgency of moving away from planet-heating fossil fuels as quickly as possible.â
9 months ago
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Linking extreme weather events with USGS GAGES2 watersheds. Starting with atmospheric rivers from
www.nature.com/articles/s41...
and hurricanes from NOAA HURDAT2. These maps are just coverages and do not represent storm strength. Didnât realize ARs were so common in the eastern US!
9 months ago
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John Hammond
Elmera Azadpour
10 months ago
Looking to fold @uscensusbureau data into your workflows? Our latest blog shows how to use
#tidycensus
to explore & visualize social vulnerability indicators in the Western U.S., with
#reproducible
code! đ:
waterdata.usgs.gov/blog/acs-maps/
#rstats
#DataViz
#WaterInsecurity
#OpenScience
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What's a weather forecast worth?
one.npr.org/i/1212475049...
9 months ago
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Still at
#AGU24
?! Come by our elightning this afternoon to learn about our data driven hydrological drought prediction project and the new forecasting website weâll be launching in 2025!
10 months ago
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John Hammond
Adrienne Marshall
10 months ago
Come check out
@surabhiup.bsky.social
today at 4:15 in rooms 144 - she'll be talking about western U.S.-scale reservoir dead pool risks in warming climate scenarios!
#AGU24
agu.confex.com/agu/agu24/me...
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Evaluating Risk of Minimum Power Pool Events for Western US Reservoirs in Warmer Climates
In the Western United States, climate variability significantly impacts water r...
https://agu.confex.com/agu/agu24/meetingapp.cgi/Paper/1643778
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John Hammond
Dr. Ryan E. Emanuel
10 months ago
ICYMI (like I did, since I'm at
#AGU24
) Interview w/ Jeff Tiberii on WUNC's Due South is online! We had a wide-range conversation about climate change, colonialism,
#Indigenous
survival, & resilience - threads that run throughout my book,
#OnTheSwamp
@wunc.bsky.social
www.wunc.org/show/due-sou...
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A conversation with Ryan Emanuel, author of 'On the Swamp: Fighting for Indigenous Environmental Justice'
Ryan Emanuel is a member of the Lumbee Tribe and a professor of hydrology at Duke University. He talks with Jeff Tiberii about his book, On the Swamp, in a wide-ranging and also personal conversation ...
https://www.wunc.org/show/due-south/2024-12-11/ryan-emanuel-author-on-the-swamp-fighting-for-indigenous-environmental-justice
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Anna Grunes of UVM presenting on how tricky it can be to model snow in the Northeastern US at
#AGU24
. Annaâs work has advanced model capacity to capture midwinter melt and rain on snow, and sheâs shown what future snow and snowmelt runoff may look like in coming years
10 months ago
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Fantastic to start to
#AGU24
! Got to meet some University of Vermont collaborators for the first time in person, then running into new and old friends in the poster hall, followed by talks from Kendall Wnuk, Hannah van Dusen,
@shamshaw.bsky.social
, and Jeremy Diaz.
10 months ago
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John Hammond
Manuela Brunner
10 months ago
It was a pleasure to work on this new paper on 'Spatially Compounding
#Drought
Events in Brazil' with
@gabrielagesualdo.bsky.social
:
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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John Hammond
Ryoko Araki
10 months ago
đ§ Check out Dr. Hilary McMillan's lab presentations at
#AGU24
next week! đ§ Visit our session Runoff Generation Processes (H31V) with in poster hall B-C on Wednesday AM, organized by Aliva Nanda,
@nitinsingh.bsky.social
, Sidney Bush, Sumit Sen, and me!!
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All of the hurricanes and tropical storms to pass within 500 km of the conterminous United States since 1980 at a 3 hour time step. Brighter colors are stronger storms. Data from
www.ncei.noaa.gov/products/int...
10 months ago
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Ben Letcher
10 months ago
And here are 3 streams in Shenandoah NP during hurricane Helene - yikes!
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Do you use trail cameras to monitor streams, rivers or other water bodies? Looking for a platform to turn those images into relative flow or stage information? Or even just to look back through all of your images? Check out Flow Photo Explorer!
www.usgs.gov/apps/ecoshed...
10 months ago
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Check out this website where you can enter city or zip code to get all Hurricanes that have ever passed through that area
coast.noaa.gov/hurricanes/#...
. Example below for Baltimore:
10 months ago
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Please consider volunteering as a OSPA judge of student presentations or posters! Of 18 students, we currently only have judges signed up for one. Please share with your networks!
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10 months ago
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John Hammond
Aditi Bhaskar
11 months ago
We are seeking a domestic PhD student with a background in Civil and Environmental Engineering or a related field to participate in a graduate program focused on the resilience and sustainability of the built environment. Read more about the projects at
www.colorado.edu/gaann-infras...
.
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One week until
#AGU24
! Come check out our sessions for the latest science on snowmelt partitioning, streamflow generation in snow dominated areas, and much more!
10 months ago
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Photos from Pepperâs happy place (my happy place too)
10 months ago
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Start listening at 37:30, if this doesn't make you hate billionaires, I don't know what will.
open.spotify.com/episode/3Dxo...
10 months ago
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Check out this new dashboard from USGS for accesssing
#SWOT
data for rivers, lakes and other water bodies. So neat to see how many water bodies are SWOT observable in the Prairie Potholes region
apps.usgs.gov/wisp
10 months ago
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