#streamgage — Public Fediverse posts on home.social

💧🌏 Greg Cocks @[email protected] · 2026-07-17 · 01:49 UTC

Beyond The 100-Year Flood - Probabilistic Flood Hazard Assessment For King And Pierce Counties Under Future Climate Scenarios
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https://doi.org/10.5194/nhess-26-3231-2026 <-- shared #openacess paper
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[part of my old stomping ground as an engineering geologist]
H/T @Kees Nederhoff
“Flood maps are usually built from a single design storm. For King and Pierce Counties in the Pacific Northwest (USA), [the authors] tried the opposite - simulate 82 years of actual coastal and river conditions (plus 18 synthetic years) with SFINCS and let the statistics fall out cell by cell. That took about 5,400 yearly simulations and 194,000 CPU hours on USGS's Hovenweep HPC. Worth it!
The design-event shortcut turns out to hide a real hazard. A deterministic 10-year event underestimated flood depths by up to half a meter compared to the continuous runs.
The bigger surprise [to the authors] was how one-sided the climate signal is. One metre of sea level rise takes King County's expected annual flooded area from 161 --> 787 hectares, almost a factor of five. Changes in storminess over the same horizon barely register. And somewhere between 100 and 150 cm of SLR, land that never floods today starts flooding fast. If you plan adaptation in Puget Sound, that threshold matters more than any single return-period map.
[They] also propose Expected Annual Flooded Area (EAFA) as a probability-weighted alternative to the binary "inside or outside the 100-year zone" label…”
#USGS #supercomputing #Hovenweep #HPC #coast #coastal #PNW #Seattle #PacificNorthwest #risk #hazard #riskmanagement #model #modeling #CFRM #deterministic #probabilistic #climatechange #extremeweather #fedscience #WA #KingCounty #PierceCounty #WashingtonState #USA #flood #flooding #compoundflooding #floodmaps #SFINCS #storm #weather #climate #climatechange #rainfall #precipitation #sealevel #sealevelrise #SLR #100yearflood #floodhazardmapping #returnperiods #pluvial #fluvial #spatialanalysis #spatiotemporal #remotesensing #streamgage #history #historicflooding #projections #predictions
#USGS

#openacess #usgs #supercomputing #hovenweep #hpc #coast

💧🌏 Greg Cocks @[email protected] · 2026-06-05 · 00:20 UTC

Streamflow And Surface-Water Presence Data Availability Across The Conterminous United States [CONUS] - A Review For Headwater Systems
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https://doi.org/10.1002/hyp.70572 <-- shared paper
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#water #hydrography #hydrology #CONUS #USA #streamflow #surfacewater #bias #monitoring #regional #gage #gauge #headwater #stream #literaturereview #opendata #publicdata #review #spatial #spatialanalysis #mapping #USWest #sensor #remotesensing #model #modeling #research #network #probabilityofflow #permanence #ecosystems #waterresources #watermanagement #streamgage #CONUS #Lower48th #firstorder #secondorder #Strahler #distribution #spatialdistribution #communityscience #geomorphometry #hydrogeomorphology #physiography
@USGS

#water #hydrography #hydrology #conus #usa #streamflow

💧🌏 Greg Cocks @[email protected] · 2026-03-31 · 23:21 UTC

River Droughtcast - Streamflow Drought Status And Forecasts [USGS]
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https://water.usgs.gov/vizlab/streamflow-drought-forecasts/ <-- shared USGS spatial/data resource with webmap
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https://water.usgs.gov/vizlab/modeling-drought/ <-- shared USGS modeling methods overview, with visualisations
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https://doi.org/10.3389/frwa.2025.1709138 | https://pubs.usgs.gov/publication/70273497 <-- shared paper|publication
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#USGS #modeling #openscience #water #USA #opendata #drought #hydrology #extremeweather #DroughtCast #mapper #streamflow #forecast #prediction #GIS #spatial #mapping #spatialanalysis #spatiotemporal #waterresources #AI #machinelearning #weather #climate #streamgage #gauge #CONUS #streamflowdrought #management #watersecurity
@USGS

#usgs #modeling #openscience #water #usa #opendata

💧🌏 Greg Cocks @[email protected] · 2026-03-14 · 01:36 UTC

Why Does The USGS Use The Spelling "Gage" Instead Of "Gauge"?
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https://www.usgs.gov/faqs/why-does-usgs-use-spelling-gage-instead-gauge <-- shared technical post
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https://labs.waterdata.usgs.gov/visualizations/gages-through-the-ages/index.html <-- shared link, “[USGS] Gages Through the Ages - How the history of streamgaging reflects the evolving water needs of the nation”
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“[1888 graduate student Frederick Haynes] Newell is purported to be the person responsible for the adoption of the USGS spelling of “gage” instead of “gauge”. Around 1892, Newell reasoned that “gage” was the proper Saxon spelling before the Norman influence added a 'u'…”
#water #hydrography #history #stream #gage #gauge #surfacewater #streamgage #network #Nation #flow #waterresources #mapping #spatial #waterflow #watersecurity #fedscience #fedservice #publicgood #opendata #monitoring
#USGS