#innundation — Public Fediverse posts on home.social

💧🌏 Greg Cocks @[email protected] · 2026-08-07 · 04:46 UTC

Coastal Flooding At Predictable Hours
--
https://doi.org/10.1038/s41467-026-75710-5 <-- shared paper
--
H/T @bruna Alves | Nature Communications | Editor
“When do coastal floods happen? ⏱️🌊
A new study [link above] shows that, in many tide-dominated coastal regions, flooding tends to occur at specific and recurring times of day. Rather than being completely random, flood events often cluster around predictable hours driven by local tidal patterns.
By analysing coastal flood observations from the UK and the US, [the authors] show[ed] that the timing of flood events can be highly structured, with some locations experiencing floods disproportionately during certain parts of the day.
This adds a temporal dimension to coastal flood risk. We often focus on how frequently floods occur, how severe they are, and where they happen. This study highlights that when they occur may also matter, particularly as rising sea levels increase the frequency of coastal flooding.
The findings provide a useful perspective for coastal adaptation, risk communication, and emergency planning…”
--
“Flooding is typically perceived as a sudden and unpredictable hazard. Here, [they] show that recurrent flooding can occur at highly predictable times in tidally dominated coastal systems. This predictability stems from phase-locking of tidal constituents and constituent pairs with the solar day, causing peak tides to recur at consistent local times set by regional tidal propagation. Using tide-gauge records from the United States and the United Kingdom, [they] quantif[ied] the intraday timing of coastal flood events and show strong clustering at specific hours, particularly where semidiurnal or mixed tides dominate. For example, floods in Boston cluster around noon and midnight, whereas in southern California they occur in the morning. Sites with stronger non-tidal variability show weaker clustering. This temporal predictability extends beyond nuisance flooding to larger consequential events involving inundation, road closures and infrastructural damage, highlighting opportunities for anticipatory risk communication, emergency planning and time-sensitive coastal adaptation…”
#coast #coastal #flood #flooding #spatialanalysis #spatiotemporal #time #statistics #geostatistics #tide #tidal #timing #temporal #floodrisk #risk #hazard #sealevel #sealevelrise #climatechange #emergency #planning #tideguage #UK #USA #innundation #infrastructure #transportation #riskcommunication

#coast #coastal #flood #flooding #spatialanalysis #spatiotemporal

💧🌏 Greg Cocks @[email protected] · 2026-07-28 · 05:03 UTC

Quantifying UK Coastal Flood Exposure Under Future Sea-Level Rise To [2100 and] 2300
--
https://doi.org/10.1038/s41467-026-74982-1 <-- shared paper
--
https://www.theguardian.com/environment/2026/jul/21/millions-long-term-coastal-flooding-risk-uk-climate-action <-- shared media article
--
H/T @University of Bristol School of Geographical Sciences
“🌊 New research on long-term coastal flooding as a result of climate inaction 🌊
… The researchers found:
🔷 By 2100 at least an additional 0.5 million people exposed to the 1-in-200 year undefended flood extent - a 25% increase compared to present day.
🔷 Under the most pessimistic storyline by 2300 involving significant ice-sheet instability, an additional 13 million people could be exposed to the 1-in-200 year undefended flood event.
🔷 Under some scenarios there is a need for large-scale movement of populations and settlements away from the coast in the coming centuries…”
--
“Up to 13 million people in the UK face the long-term risk of coastal flooding due to the climate crisis, scientists have warned, with a ‘reasonable worst-case scenario’ suggesting the need for the large-scale movement of populations away from a dramatically reshaped coast…
Sea level has risen by about 20cm around the UK in the last century and is accelerating. A further 40cm to 60cm by 2100 is already baked in, meaning about half a million more people will be at risk of their homes being flooded, on top of the 2.5 million already in danger near the coasts. Lincolnshire and the Humber estuary are most in danger…”
--
“The latest Intergovernmental Panel on Climate Change assessment report highlighted the potential for more than 15 metres of global sea-level rise by 2300. In this study, [the authors] explore the implications for UK coastal flood exposure by combining national-scale flood modelling with physically-based storylines of UK sea-level rise. By 2100 all storylines show broadly similar results with at least an additional ½ million people exposed to the 1-in-200 year undefended flood extent, which represents a 25% increase compared to present day. Under the most pessimistic storyline by 2300 involving significant ice-sheet instability, an additional 13 million people could be exposed to the 1-in-200 year undefended flood event. This would imply the potential need for large-scale movement of populations and settlements away from the coast in the coming centuries. Given current global emissions pledges, exposure increases by 1.7 million people by 2300, however up to 1 million could be avoided if Paris Agreement targets for greenhouse gas emissions are met…”
#coast #coastal #innundation #climatechange #global #sealevel #sealevelrise #SLR #flood #flooding #climatechange #population #infrastructure #UK #England #Scotland #Wales #NorthernIreland #Lincolnshire #Humber #estuary #settlement #city #urban #mitigation #planning #policy #infrastructure #risk #hazard #humanimpacts #spatialanalysis #spatiotemporal #GIS #spatial #mapping #coastalflooding #climatecrisis #model #modeling #elevation #DEM

#coast #coastal #innundation #climatechange #global #sealevel

💧🌏 Greg Cocks @[email protected] · 2026-07-10 · 22:36 UTC

Compound Hydrogeomorphic Cascades And Rapid Upstream To Downstream Hazard Coupling In The Eastern Himalaya
--
https://doi.org/10.1038/s41598-026-52915-8 <-- shared paper
--
https://doi.org/10.1007/s11600-022-00943-z <-- shared paper
--
H/T @Kuldeep Dutta | Geology-Earth Science
“… In hilly regions transitioning rapidly to low gradient alluvial plains, localized hydrometeorological triggers can instantly scale into devastating basin wide disasters. This study dissects the September 2020 cascading hazard in parts of the Arunachal Pradesh-Assam corridor to quantify the rapid coupling between upstream hillslopes and downstream floodplains.
Check out the [attached graphical abstract figure] for an integrated visual workflow of the entire disaster continuum from hillslope failure to floodplain transformation...”
--
“Extreme precipitation in the Eastern Himalaya is increasingly associated with coupled hillslope-floodplain hazards. This study examines the 17th-18th September 2020 rainfall event in Arunachal Pradesh initiating landslides and its downstream impacts in Assam, India, using multi-sensor satellite data and long-term rainfall records. Sentinel-2 imagery was used to map landslides and debris flows, Sentinel-1 SAR data to delineate flood extent, and IMD gridded rainfall (1996–2020) to analyse rainfall spell characteristics. The event triggered widespread slope failures, localized landslide damming, and a subsequent breach, generating sediment-laden flows that inundated ~ 100 km² of the Dhemaji floodplain. A backscatter-derived Relative Flood Volume Index (RFVI) indicates spatial variability in inundation intensity, although it does not represent absolute flood volume. Rainfall analysis suggests that antecedent wetness from preceding spells preconditioned slopes, while peak daily rainfall (> 170 mm day−1) initiated landsliding. Power-law scaling shows negligible dependence of intensity on duration (R2 ≈ 0.0004), whereas cumulative rainfall exhibits a stronger relationship with duration (R2 ≈ 0.54). These results indicate distinct roles of rainfall intensity and accumulation in controlling landslide initiation and downstream flooding, respectively, highlighting the importance of compound rainfall forcing in rapid hydrogeomorphic cascades…”
#EarthScience #RemoteSensing #Himalayas #NaturalHazards #ClimateChange #ScientificReports #GeospatialAnalysis #DisasterMitigation #Landslide #trigger #Flooding #massmovement #extremeweather #engineeringgeology #floodplain #innundation #hillslope #fluvial #pluvial #alluvial #sediment #sedimentation #hydrometeorology #ArunachalPradesh #Assam #India #Brahmaputra #risk #hazard #geology #engineeringgeology #remotesensing #earthobservation #spatialanalysis #spatiotemporal #disaster #hydrogeomorphology #workflow

#earthscience #remotesensing #himalayas #naturalhazards #climatechange #scientificreports

💧🌏 Greg Cocks @[email protected] · 2026-04-23 · 04:06 UTC

How To Study Coastal Evolution
Researchers reviewed what’s known about how coastlines are changing and made recommendations for how to learn more
--
https://eos.org/research-spotlights/how-to-study-coastal-evolution <-- shared technical article
--
https://doi.org/10.1029/2024EF005833 <-- shared paper
--
#coast #coastal #coastline #change #prediction #spatiotemporal #spatialanalysis #USA #extremeweather #storm #stormsurge #sealevel #sealevelrise #SLR #risk #hazard #mitigation #shorelines #habitat #ecosystem #inlets #flood #flooding #wetlands #processes #ecosystems #community #planning #policy #coordinated #framework #management #decisionmaking #overview #naturalprocesses #innundation #damage #infrastructure #landforms #CoastalScience #ClimateChange #SeaLevelRise #EarthsFuture #AGU #CoastalResilience
@USGS @NOAA @NOAA Centers for Coastal Ocean Science

#coast #coastal #coastline #change #prediction #spatiotemporal

💧🌏 Greg Cocks @[email protected] · 2026-03-11 · 01:01 UTC

New User Guides Available - Coastal Inundation Dashboard | Coastal Ocean Reanalysis | Inundation Analysis Tool
--
https://tidesandcurrents.noaa.gov/news_posts/article.html?post=2517 <-- shared technical resource 🔗
--
https://tidesandcurrents.noaa.gov/ <-- shared NOAA Tides & Currents resource 🔗
--
https://coast.noaa.gov/digitalcoast/topics/coastal-inundation.html <-- shared NOAA Coastal Inundation web portal 🔗
--
https://tidesandcurrents.noaa.gov/cora.html <-- shared NOAA Coastal Ocean Reanalysis (CORA) web portal 🔗
--
https://tidesandcurrents.noaa.gov/inundationanalysis/station_list.html <-- shared NOAA Inundation Analysis Tool web portal
--
#coast #coastal #innundation #webtools #spatialanalysis #spatiotemporal #flood #flooding #risk #hazard #products #datasets #opendata #risk #hazard #analysis #GIS #spatial #mapping #guides #userguides #selfdirected #learning #education #tutorial #openscience #fedsservive #fedscience #publicgood #publicsafety #USA #tides #tidal #stormsurge #SLR #sealevel #sealevelrise #subsidence #CORA #COOPS
#NOAA

#coast #coastal #innundation #webtools #spatialanalysis #spatiotemporal

💧🌏 Greg Cocks @[email protected] · 2026-02-12 · 05:19 UTC

Comparing Flood Inundation Map Features and Diagnosing Decision Support Design Challenges
--
https://doi.org/10.1002/hyp.70362 <-- shared paper
--
#GIS #spatial #mapping #climatechange #extremeweather #pluvial #fluvial #water #surfacewater #precipitation #flood #flooding #floodinnundation #innundation #NOAA #FIM #floodinnundationmaps #model #modeling #spatialanalysis #spatiotemporal #floodresponse #response #naturalhazard #monitoring #forecasting #forecast #visualisation #FIMAN #remotesensing #Copernicus #impactassessment #research #emergencymanagement #humanimpact #safety #publicsafety #risk #hazard #infrastructure #FloodMapper #floodwatch #flashflood
@FEMA | @NOAA | @USGS |

#gis #spatial #mapping #climatechange #extremeweather #pluvial

💧🌏 Greg Cocks @[email protected] · 2025-12-31 · 04:24 UTC

Strengthening Coastal Flood Forecasting Through Event-Based Data Capitalization - A Case Study From The December 2022 Storm Surge In Québec City
--
https://doi.org/10.1007/s11069-025-07780-5 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #hydrospatial #marine #maritime #sealevelrise #stormsurge #extremeweather #climatechange #coast #coastal #risk #hazard #erosion #innundation #flood #flooding #coastalmanagement #hydrodynamic #model #modeling #spatialanalysis #spatiotemporal #velocity #water #hydrology #infrastructure #cost #economics #damage #publicsafety #SaintLawrence #Quebec #QuebecCity #canada #Fluvial #Estuary #riskmanagement #historic #topography #bathmetry #urban #planning #urbanarea

#gis #spatial #mapping #remotesensing #hydrospatial #marine

Led By Gilded Fools @[email protected] · 2025-11-23 · 18:02 UTC

RE: https://kolektiva.social/@MikeDunnAuthor/115600202213323548

@ai6yr For the west coast residents, Ben's Disaster preparedness list needs to include a (inflatable) boat, though it would be hard to fit it into a stocking.

#Disaster #Flood #Monsoon #River #Innundation #AtmosphericRiver