#nhd — Public Fediverse posts

Conserving Just 35% Of The Nation's Waterways Could Sustain Freshwater Biodiversity | A Freshwater Resilient And Connected Network To Sustain Biodiversity Under A Changing Climate
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https://doi.org/10.1371/journal.pone.0351782 <-- shared paper
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https://phys.org/news/2026-09-nation-waterways-sustain-freshwater-biodiversity.html <-- shared technical article
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H/T @erik Martin | Spatial Analyst/Developer
“By evaluating the health of waterways across the U.S., researchers have identified a network encompassing about one-third of rivers and streams that, if conserved and restored, could sustain the nation's freshwater biodiversity in the face of habitat degradation and climate change [1st link above.]…
During the past century, streams and lakes in the U.S. have deteriorated as more than 150,000 dams have fragmented river networks, and changes to the landscape and groundwater use have altered how and where the water flows. Many freshwater species are now in rapid decline, exacerbated by the impacts of climate change.
To address this crisis, [the researchers] worked with 66 freshwater conservationists to map freshwater networks in the contiguous U.S. and evaluate their resilience to degradation. Each watershed was scored based on its connectivity, condition, water availability and naturalness of flow, and checked against local surveys of freshwater biodiversity…”
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#water #hydrology #hydrography #freshwater #aquatic #biodiversity #USA #sustainability #waterresources #waterquality #network #connections #climatechange #habitat #degradation #waterways #health #risk #hazard #humanimpacts #streams #lakes #rivers #groundwater #pumping #dams #infrastructure #species #decline #hindering #adaption #conservation #watershed #HUC12 #spatialanalysis #mapping #spatial #spatiotemporal #survey #connectivity #naturalness #precipitation #rainfall #extremeweather #resilience #resiliencescore #opendata #NHD #3dhp #WBD #USGS #CONUS
@ The Nature Conservancy

The Past, Present & Future Of Dams In The Southeastern U.S.
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https://doi.org/10.1007/s00267-026-02579-x <-- shared paper
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H/T @UF Water Institute
“[The authors are] helping build a foundation for better water policy, planning, and resilience. By diving into the into the history, present status, and future of dams in the southeastern region, [they are] filling a research gap of an under-examined area..”
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“Dams and reservoirs have played a central role in the industrialization and economic development of the United States, providing hydropower, flood control, navigation, water supply, and recreation. Yet they have also transformed river systems, displaced communities, and contributed to major ecological change. This paper presents an exploratory review of the history, present status, and future of dams in the Southeastern United States, focusing on U.S. Geological Survey hydrologic regions 3 (South Atlantic-Gulf) and 6 (Tennessee). Using data from the National Inventory of Dams, historical archives, and interdisciplinary literature, the study examines temporal trends in dam construction, societal and ecological impacts, hazard conditions, and emerging trends in dam management. The Southeastern U.S. contains some of the nation’s highest dam densities and storage capacities, with more than 19,000 inventoried dams as of 2026. Many dams were constructed during the mid-twentieth century through the New Deal and postwar infrastructure programs led by the Tennessee Valley Authority and the U.S. Army Corps of Engineers. This aging infrastructure, in combination with inconsistent regulation, and increasing exposure to extreme weather raises growing safety concerns, particularly for the many high-hazard dams in poor or unrated conditions in the region. The paper also explores future trajectories, including hydropower modernization, pumped storage expansion, and dam removal efforts aimed at balancing renewable energy production, ecological restoration, and public safety…”
#dams #dam #usecase #USA #US #SouthEast #reservoir #industry #economics #aging #infrastructure #history #future #hydropower #floodcontrol #navigation #watersupply #recreation #waterresources #water #hydrology #ecology #ecosystems #community #humaninpacts #NHD #WBD #USGS #USACE #TVA #NationalInventoryofDams #literaturereview #SoutheasternUS #inventory #maintenance #pumpedstorage #removal #renewableenergy #publicsafety

#ArbolateSum is my favourite spatial hydrography parameter...

So I asked AI (on my personal PC) to make me a t-shirt in the style of #SpinalTap, the prompting was fun...

#water #hydrography #GIS #spatial #mapping #flownetwork #attribute #tshirt #NHD #USA #3DHP #EDH #SundayFunday

My 'favourite' technical phrase specific to hydrography - Arbolate Sum - I thought deserved an #AISlop band t-shirt in the style of 'Spinal Tap'...
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#arbolatesum #hydrography #NHD #SpinalTap #bandtshirt @USGS #USGS #hydrology #CFS

US CONUS Rivers Of Dimension By Annual Flow – An Older (2013) But Still SO Useful Hydrologic Visualisation
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https://pacinst.org/american-rivers-a-graphic/ <-- shared technical post
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“... Several things stand out:
1) the massive flow of the mighty Mississippi and Columbia River systems
2) the paucity of major rivers in the western US, especially the southwestern US, where the only major rivers are the seriously over-tapped Colorado and Rio Grande Rivers
3) the local importance of the Sacramento-San Joaquin Rivers in California, which serve the state’s cities and agricultural regions…”
#visualisation #infographic #water #hydrographic #hydrology #US #USA #CONUS #flow #humanimpacts #gage #USGS #USGSgage #agriculture #transportation #rivers #waterresources #overuse #monitoring #planning #AmericanRivers #mapping #spatial #spatialanalysis #scale #symbology #proportional #symbology #bigriver #Colorado #Columbia #Mississippi #SanJoaquin #RioGrande #NHD #NationalHydrographyDataset
#PacificInstitute | #USGS | #AmericanRivers

Nice To Be 'Back In The Data Trenches' Directly
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https://www.usgs.gov/3d-hydrography-program <-- shared U.S. Geological Survey (USGS) #3DHP home page
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I don't get to be here that often (and that is OK, #ILikeMyJob) - but it is nice to be back working directly with some individual spatial datasets - be it in #QGIS, #ArcGISPro, #PostgreSQL / #PostGIS or wherever...
#GIS #spatial #mapping #water #dataquality #water #hydrography #3DHP #NHD #opendata #USA #MI #reservoirs #dams #pluvial #fluvial #usecase #SQL

The Western Texas, etc hydrography/physiography especially - as recorded in NHD-sourced data - is always fascinating...
#hydrography #NHD #3DHP #geomorphology #USA #physiography #flowlines #opendata #bluelines #hydrology #USGS

Floodplain Mapping - An Age-Old Practice Updated For Today's Flooding Events
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https://woolpert.com/news/blogs/floodplain-mapping-an-age-old-practice-updated-for-todays-flooding-events/ <-- shared technical blog post
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[this post should not be considered an endorsement of this specific vendor, rather sharing an informative technical article]
#GIS #spatial #mapping #opendata #model #modeling #flood #floodplain #flooding #3DHP #NHD #remotesensing #LiDAR #risk #hazard #water #hydrology #geohazard #river #terrace #elevation #climatechange #extremeweather #photogrammetry #property #infrastructure #mitigation #engineering #event #agriculture #storm #rainfall #precipitation #regulations #design #construction #seasonal #damage #cost #economics #cropland #lowlands #data #topography #geomorphology #geomorphometry
@USGS @NOAA @nws

Floodplain Mapping - An Age-Old Practice Updated For Today's Flooding Events
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https://woolpert.com/news/blogs/floodplain-mapping-an-age-old-practice-updated-for-todays-flooding-events/ <-- shared technical blog post
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[this post should not be considered an endorsement of this specific vendor, rather sharing an informative technical article]
#GIS #spatial #mapping #opendata #model #modeling #flood #floodplain #flooding #3DHP #NHD #remotesensing #LiDAR #risk #hazard #water #hydrology #geohazard #river #terrace #elevation #climatechange #extremeweather #photogrammetry #property #infrastructure #mitigation #engineering #event #agriculture #storm #rainfall #precipitation #regulations #design #construction #seasonal #damage #cost #economics #cropland #lowlands #data #topography #geomorphology #geomorphometry
#USGS #NOAA #NWS

🎉 Good News: Waverly-South Shore Team to Represent South Dakota at National History Event

https://www.mykxlg.com/news/local/good-news-waverly-south-shore-team-to-represent-south-dakota-at-national-history-event/article_ba5baa12-ee20-11ef-8fe2-c7ab43498f48.html

#KXLGNews #GoodNews #KXLGRadio991 #LiveandLocal #LocalNews #SouthDakota #news #NHD

I Am Proud To Be Part Of The Integrated Team Generating and Publishing An Open Data 3DHP Hydrology Spatial Data Product For The Nation At The USGS
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https://doi.org/10.5066/P148NT7B <-- shared product DOI
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https://commons.datacite.org/doi.org?query=10.5066%2FP148NT7B <-- shared DateCite repository record
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https://3dhp.nationalmap.gov/ <-- 3DHP data is also available via a USGS spatial data service (with select & export capability)
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[‘my’ first product DOI generation & publication as well ~smile~]
#GIS #spatial #mapping #data #water #hydrology #LiDAR #EDH #elevationderivedhydrography #3DHP #opendata #publicdata #DOI #stagedproducts #3DTNM #3DEP #NHD #national #USA #nonproprietary #waterresources #spatialanalysis #model #modeling #3d #vector #schema #DOI#geopackage #filegeodatabase #metadata #XML
@USGS

Webinar - USGS Water Availability Assessment Release
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https://events.gcc.teams.microsoft.com/event/3a411ece-085b-43ed-be4f-a996406a7e54@0693b5ba-4b18-4d7b-9341-f32f400a5494 <-- details and to register
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https://www.usgs.gov/mission-areas/water-resources/science/national-water-availability-assessment-data-companion <-- shared National Water Availability Assessment Data Companion
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#GIS #spatial #mapping #water #hydrology #NHD #3DHP #webinar #waterresources #WRMA #WaterAvailabilityAssessment #wateravailability #USA #Nation #watersupply #demand #wateruse #watersecurity #model #modeling #spatialabalysis #waterquality #freshwater #usecase
@USGS

The 3D National Topography Model Call For Action—Part 1. The 3D Hydrography Program [USGS publication]
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https://doi.org/10.3133/cir1519 <-- shared USGS Circular 1519
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https://www.usgs.gov/3DHP <-- 3DHP home page at the USGS
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https://hydro.nationalmap.gov/arcgis/rest/services/3DHP_all/MapServer <-- open data WMS for 3DHP, WFS to follow soon
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[awareness: this is my primary project at the USGS]
#GIS #spatial #mapping #water #hydrology #USGS #3dhp #EDH #elevationderivedhydrography #3DHydrographyProgram #NHD #WBD #NHDPlusHR #nation #USA #nationwide #usecase #appliedscience #economicbenefits #planning #monitoring #decisionmaking #informeddecisions #3d #xyz #waterbody #stream #river #flowline #lake #network #routing #opendata #3dtnm #topography #internetofwater #infostructure
@USGS

I really enjoyed seeing all of the Day 1 toots and data viz! For Day 2, I’m getting out of my comfort zone to explore hydrological data. The map shows streams and reaches from the USGS National Hydrography Dataset (Hydrological Unit 8) in the upper Potomac River Watershed.

#30DayMapChallenge #Day2 #USGS #DMV #map #ArcPro #HUC #HUC8 #NHD #NationalHydrographyDataset #PotomacRiver

Extensibility Of U-Net Neural Network Model For Hydrographic Feature Extraction And Implications For Hydrologic Modeling
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https://doi.org/10.3390/rs13122368 <-- shared paper
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#GIS #spatial #mapping #machinelearning #neuralnetwork #Unet #featureextraction #hydrography #hydrology #water #automation #remotesensing #surfacewater #NHD #bluelines #topography #deeplearning #AI #artificialintelligence #LiDAR #ifSAR #elevation #topography #ANN #HPC #model #modeling #trainingdata #Alaska #USA #watersheds #DTM #DSM #DEM #routing #network #D8 #maps #opendata #3dep #elevation #topography #USGS

Met deze in'schat'ting bewijst de columnist geen groot politiek inzicht, maar slechts z'n persoonlijke hypochondrie.
#schatexit 👎 #nhd #keijzer
https://www.noordhollandsdagblad.nl/cnt/dmf20230901_60090967

Blow-Me-Down Brook, NH – An NHD Flowline Picked ‘Randomly’
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http://npshistory.com/brochures/saga/blow-me-down-na-1981.pdf <-- 1981 NPS guide
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https://www.usgs.gov/3d-hydrography-program <-- USGS’s 3DHP home page
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I am working on some hydroaddressing / network traversing technical approaches for 3DHP – and needed an example of a multisegment flowline in NHD-sourced dataset, and so ‘randomly’ got this one - Blow-Me-Down, NH, from WBD HUC4-0108.
Although we map so many flowlines (~20 million in the USA for NHD-sourced spatial data, estimated 10x that for the EDH data still to be determined across the USA), I like trying to understand what a flowline or waterbody ‘is’ to the people on the ground as much as I can...
#GIS #spatial #mapping #networktraversing #3DHP #NHD #WBD #water #hydrology #USGS #mapping #USA #elevationderivedhydrography #EDH #3denabled #3dmapping #3dmodeling #3dep #elevation #opendata #nationally #waterresources #appliedscience #newhampshire #watermanagement #watermanagement #alldataisspatial #publicdata

How 3D Hydrography [3DHP] Can Set The Rivers Straight [USGS]
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https://www.geoweeknews.com/news/3d-hydrography <-- shared technical article
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#GIS #spatial #mapping #3D #elevationderivedhydrography #EDH #hydrology #3dhydrography #3dhp #elevation #3dep #lidar #ifsar #DEM #water #hydrology #nhd #wbd #nhdplushr #opendata #Nation #USA #rivers #streams #lakes #waterbodies #flowlines #waterresources #watermanagement #flooding #floodplain #appliedscience #standardisation #consistent #spatiotemporal #spatialanalysis #usecase #model #modeling
@usgs

Saturday afternoon, we reached our NHD fundraising goal! 🌎 ✈️

THANK YOU SO MUCH!

We're ending the GoFundMe tonight (Sunday night). Any additional funds we receive today will be given to the girls' teachers to help defray their travel costs.

https://www.gofundme.com/f/help-our-girls-get-to-washington-dc

On behalf of all the families, we are so grateful for the support we've received from all over.

#history #nhd #nationalhistoryday #fundraiser #education #school #stl #stlouis

National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection
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https://catalog.data.gov/dataset/national-hydrography-dataset-nhd-usgs-national-map-downloadable-data-collection <-- link to resource and data downloads
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https://www.usgs.gov/core-science-systems/ngp/national-hydrography <-- link to open hydrology data, USA
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#GIS #spatial #mapping #gischat #water #hydrology #USGS #NHD #NationalHydrographyDataset #publicdata #opendata #spatialdata #data #digital #network #TNM #NGTOC #NGP #geography #USA #CONUS #Alaska #Hawaii #cartography #appliedscience #spatialanalysis #watermanagement #waterresources #waterinfrastructure

We have raised ~ $3,800 so far toward sending my daughter and her classmates to National History Day. 🌎 ✈️

THANK YOU!

We have reduced the goal on our GoFundMe to accurately reflect the families' updated cost estimates. We still have a ways to go, and appreciate any signal boosting you can do!

But — we heard today our school district won't pay for teachers to attend. 👩‍🏫

https://www.gofundme.com/f/help-our-girls-get-to-washington-dc

#history #nhd #nationalhistoryday #fundraiser #education #school #stl #stlouis

Something personal: My daughter and five of her classmates are raising money to travel to Washington D.C. to compete in the National History Day competition. 🏛️

https://www.gofundme.com/f/help-our-girls-get-to-washington-dc

The six girls are students in the Ferguson-Florissant school district. They took top honors for individual and group performances at the Missouri state competition, securing spots in the nationals. 🏆

#history #nhd #nationalhistoryday #travel #fundraiser #education #school #stl #stlouis

U.S. Forest Service National Riparian Areas Base Map For The Conterminous United States In 2019
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https://www.fs.usda.gov/rds/archive/catalog/RDS-2019-0030 <-- shared paper
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https://storymaps.arcgis.com/stories/8cd69adaaaf541c78f8d867f0ec6b6ef <-- shared story map
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#GIS #spatial #mapping #opendata #riparian #areas #CONUS #USA #basemaps #ecosystems #vegetation #soil #characteristics #environment #survey #spatialanalysis #monitoring #planning #management #policy #framework #geospatialdatasets #national #raster #floodheight #hydrology #water #NHD #WBD #NHDPlus #hydrologic #wetlands #3DEP #elevation #remotesensing #MRLC #landcover #NLCD #interagency #cooperation
#USFS #USDA #USGS #USFWS

Toward A Searchable, Network-Linked Database Of River Inundation Extents
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https://waterdata.usgs.gov/blog/nhgf-river-inundation/ <-- shared article
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#GIS #spatial #mapping #water #hydrology #hydrography #hydrofabric #flood #innundation #remotesensing #FIM #modeling #model #remotesensing #imagery #satellite #gischat #spatialanalysis #spatiotemporal #flooding #python #landsat #DSWE #surfacewater #NHD #referencedataset #database #opendata #openaccess #CONUS #NLDI #internetofwater #IOW #network
#USGS

Talking To CSU Warner College Students on USGS Hydrography and 3D The National Map (TNM) Products Overall
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https://www.usgs.gov/national-hydrography/3d-national-topography-model-call-action-part-1-3d-hydrography-program <-- link to 3DHP project
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https://gis.colostate.edu/event/seminar-usgsdata-032023/ <-- CSU link
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H/T Elizabeth Tulanowski
It was a pleasure to be invited to speak to her CSU Warner College NR493 class and the Geospatial Centroid at CSU
#GIS #spatial #mapping #NHD #3DHP #3DEP #elevation #LiDAR #3DTNM #hydrology #water #spatialanalysis #opendata #USA #project #students #university #USGS #CSU

.

A pleasure to get to speak with some university students again, on Monday @ CSU 😊 [USGS, NHD, 3DHP]
#GIS #spatial #mapping #water #hydrology #spatialdata #opendata #USGS #NHD #3DHP #university #college #class #seminar #CSU
https://gis.colostate.edu/event/seminar-usgsdata-032023/

Comparative Analysis Of Performance And Mechanisms Of Flood Inundation Map Generation Using Height Above Nearest Drainage
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https://doi.org/10.1016/j.envsoft.2022.105565 <-- shared paper
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#GIS #spatial #mapping #model #modeling #flood #water #hydrology #floodinundation #floodinundationmapping #heightabovenearestdrainage #modelcomparison #modelconfiguration #performanceanalysis #FIM #HAND #NWC #NWM #hydrofabric #USA #nationwide #floodmapping #NWCH #NHD #NHDPlusHR #NHDPlus #inundation #weather #precipitation #catchment #ratingcurves #prediction #climate #NOAA @nws #USGS

Helping put together some iFSAR elevation data for hydrologic analyses in a HUC8 in Alaska...
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https://www.usgs.gov/3d-elevation-program <-- 3DEP’s elevation open data access
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[sad that Mastodon kills the resolution in the image, such stunning hydromorphology can be seen in the data]
#GIS #spatial #mapping #remotesensing #Alaska #USA #elevation #iFSAR #water #hydrology #3DEP #NHD #NHDPlusHR #water #spatialanalysis #opendata #datasets #glacial
#USGS

An Enhanced Hydrologic Stream Network Based On The NHDPlus Medium Resolution [MR] Dataset
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https://doi.org/10.3133/sir20195127 <-- shared paper
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#GIS #spatial #mapping #hydrology #USA #water #hydrospatial #NHD #NHDPlus #NHDPlusMR #infrastructure #data #network #appliedscience #model #survey #representation #stream #river #hydrologic #SPARROW #contaminant #pollution #diversions #waterquality #NWQA #routing #network #flowline #tracenetwork #modeling #quality #transport #USGS
@USGS @NWQA