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#coastal — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #coastal, aggregated by home.social.

  1. Fixing the fishing line

    Sometimes the fishing line gets tangled and you need to stop what you're doing and fix it.

    inphotos.org/2026/08/18/fixing

  2. Beyond The 100-Year Flood - Probabilistic Flood Hazard Assessment For King And Pierce Counties Under Future Climate Scenarios
    --
    doi.org/10.5194/nhess-26-3231- <-- shared #openacess paper
    --
    [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

  3. linkedin.com/in/genevieve-r-19

    'Genevieve R.
    ...
    'Governance | #NZ #Coastal Policy enthusiast | Writer | Public #Health advocate | Sepsis Survivor | ADHD Advocate | Busy unique mind | Proudly #WOKE| All Strong Views my own (proudly)'

    #Christchurch, Canterbury, New Zealand

    'When I first became involved in advocating for eastern #tarakihi in 2019, #Fisheries New Zealand’s own #science estimated the eastern stock had fallen to around 16% of its unfished #biomass—well below the 20% soft limit and nowhere near the #Harvest Strategy Standard target of 40%.

    'Six years later, we’re paying substantially more at the checkout, yet the eastern stock remains well under a rebuilding-plan target.
    'Recent projections suggest it is still hovering around the lower management thresholds, with recovery far from assured under current catch settings.
    'That should concern every New Zealander.
    We’ve somehow normalised the idea that a fish can become increasingly expensive while remaining chronically depleted. Consumers are paying more, commercial operators continue #fishing, and we’re repeatedly told the #fishery is being managed “#sustainably”.

    'If this is what #sustainability looks like, perhaps we need to rethink what the word means.

    'A truly #sustainable fishery shouldn’t require decades of rebuilding while the stock remains well below the level our own management system says it should achieve. It shouldn’t leave us debating whether 10–20% of the original spawning biomass is acceptable, and it most certainly shouldn’t have us celebrating modest improvements while remaining nowhere near the target.'
    .....
    'Perhaps the real question isn’t why the price has risen, it’s whether we’ve convinced ourselves that #depletion has become an acceptable definition of sustainability.
    #fisheries #rma #cma #rcep #fisheriesact #protect #enhance #restore

  4. Impact Of Floods On Surface Water Quality - A Systematic Review And Comprehensive Assessment
    --
    doi.org/10.1016/j.jhydrol.2026 <-- shared paper
    --
    epa.gov/system/files/documents <-- shared paper
    --
    “Floods, as extreme flow events, are among the costliest and devastating natural hazards. Among the various domains impacted by flooding, environmental degradation, particularly the deterioration of water quality (WQ), is one of the most impacted yet often overlooked. Therefore, it is essential to understand the nature and source of water pollution associated with flooding. This study aims to evaluate and assess multiple studies conducted globally to determine the impact of floods on WQ. A literature review and assessment of 66 studies published between 2007 and 2026 was conducted using the total comprehensiveness score (TCS). To support the scoring process, studies that scored more than 70% of the maximum achievable TCS (15.4) are considered the most detailed and comprehensive in addressing the objectives of this review. 16 studies achieved a TCS above 15.4, indicating that a limited number of studies incorporate a broader set of factors in this domain. A higher number of studies were conducted post the year 2021, highlighting both scientific progress and a growing focus on WQ impacts from disasters such as floods, beyond the traditionally emphasized socio-economic loss. Among the shortlisted studies, fluvial floods are the most frequently examined, followed by pluvial floods and coastal floods. During fluvial floods, turbidity increased by up to two orders of magnitude, while nutrient concentrations (TN, TP) typically rose by ∼ 10–30%. In contrast, pluvial floods were characterised by dilution-driven decreases in EC and TDS, with DOX, BOD and COD showing variable responses across flood types. This review evaluates flood impacts on WQ, catchment characteristics, and sources of WQ modification. The findings of the research reveal that not all WQ parameters are responsible for WQ degradation during every flood event. Rather, it is a combination of certain parameters that leads to deteriorated WQ. WQ degradation depends on interacting factors such as flood duration, extent, depth, and flow dynamics. In overall, this study provides an overview of the multiple cascading impacts of floods on WQ, along with a detailed perspective on the set of criteria that should be considered in future research…”
    #water #hydrology #hydrography #flood #flooding #criteriaassessment #waterpollution #waterquality #parameters #extremeflow #waterresources #extremeweather #waterresources #watermanagement #global #literaturereview #morphology #source #type #watersecurity #research #papers #compilation #humanimpacts #PRISMA #spatiotemporal #fluvial #pluvial #coast #coastal #risk #hazard #riverine #climatechange #EnvironmentalScience #Research #ClimateResilience #floodtype #pollution #naturalhazard

  5. Sea Levels Rising Dramatically In Some Areas Due To Land Subsidence [global]
    --
    phys.org/news/2026-05-sea-area <-- shared technical article
    --
    doi.org/10.1038/s41467-026-722 <-- shared paper
    --
    [#VLM = vertical land motion; #ASL = absolute sea-level; #RSL = relative sea-level; #GIA = (global) Glacial Isostatic Adjustment; #inSAR = Interferometric Synthetic Aperture Radar; #GNSS = Global Navigation Satellite System (~GPS); #OE24 = paper, doi.org/10.1038/s41561-023-013, interpolated VLM reconstruction based on the joint analysis of GNSS, tide gauges (TGs), and satellite altimetry]
    #GIS #spatial #mapping #remotesensing #earthobservation #sealevel #verticallandmotion #absolutesealevel #relativesealevel #GlacialIsostaticAdjustment #geomorphometry #SLR #sealevelrise #coast #coastal #flood #flooding #subsidence #landmass #landsubsidence #global #globalsealevelrise #climatechange #city #urban #farmlands #population #demographics #cities #planning #community #elevation #monitoring #spatialanalysis #spatiotemporal #altimetry

  6. Extreme Coastal Flood [and SLR] Maps For Aotearoa New Zealand
    --
    niwa.co.nz/hazards/coastal-haz <-- shared Earth Sciences New Zealand entry page
    --
    experience.arcgis.com/experien <-- NIWA sea level / coastal flooding web mapping tools
    --
    niwa.co.nz/hazards/riskscape-s <-- shared NZ RiskScape software entry page
    --niwa.co.nz/sites/default/files <-- shared 2023 #NIWA report, ‘Mapping New Zealand’s exposure to coastal flooding and sea-level rise’
    --
    niwa.co.nz/hazards/coastal-sto <-- shared NIWA Coastal storm inundation page
    --
    #GIS #spatial #mapping #NewZealand #spatialdata #opendata #water #hydrography #coast #coastal #flood #flooding #inundation #stormsurge #risk #hazard #forecasting #infrastructure #cost #damage #housing #climatechange #storm #extremeweather #tide #inundation #waves #sealevelrise #SLR #model #modeling #spatialanalysis #spatiotemporal #floodmap #remotesensing #LiDAR #SRTM #regional
    @earth Sciences New Zealand | National Institute of Water & Atmospheric Research (NIWA) | @Ministry for the Environment | Manatū mō te Taiao

  7. Assessment of Shoreline Change in Southeast Ireland Using Geospatial Techniques
    --
    doi.org/10.3390/su18073280 <-- shared paper
    --
    "... KEY INSIGHTS:
    • Coastlines are highly dynamic — 57% accretion vs 42% erosion
    • Strong contrasts between east-facing (Irish Sea) and south-facing (Atlantic) coasts
    • Identification of critical erosion hotspots (e.g., Tramore) and accretion zones in embayments
    • Coastal change is driven by a combination of wave climate, sediment availability, geology, and human activity
    --
    #GIS #spatial #mapping #Ireland #coast #coastal #dynamics #erosion #accretion #shoreline #change #digitalshoreline #spatialanalysis #spatiotemporal #remotesensing #earthobservation #SoutheastIreland #embayments #wave #climate #stormsurge #geology #humanimpacts #coastalmanagement #risk #hazard #mitigation #sealevel #RSL #risingsealevels #climatechanage #adaption #extremeweather #stormintensity #planning #monitoring #sustainable #Landsat #satellite #regional

  8. No Swimming. No Kidding.

    A storm was blowing on to Clogher Beach recently. Waves so high they’d go over your head. You definitely did not want to drive down there or swim.


    Apertureƒ/6.3CameraILCE-7RM5Focal length118mmISO20000Shutter speed1/500s

    #2026 #AtlanticOcean #beachAccess #ClogherBeach #coastal #DinglePeninsula #Ireland #Kerry #Photo #Photography #roughSurf #SonyA7RV #Water #wildSea #winterBeach
  9. Timing And Style Of Tectonic Assembly And Exhumation Of The Mchugh Complex Within The Chugach-Kodiak Accretionary Wedge, Alaska
    --
    doi.org/10.1029/2025TC009004 <-- shared paper
    --
    discoveryalert.com.au/chugach- <-- shared technical article
    --
    [this paper is WAY over my head in terms of the nuance of structural geology, but still fascinating; further, I have to say: these are TRULY gorgeous, well-designed & presented, and useful geologic maps, cross-sections, annotated photographs and other visualisations (I am jealous of that level of skill, in the BEST of ways!)]
    #geology #structuralgeology #fieldwork #geologic #mapping #KenaiPeninsula #McHughComplex #tectonics #underplating #faulting #subduction #erosion #Exhumation #ChugachKodiak #AccretionaryWedge #Alaska #coast #coastal #mineralogy #transects #crosssections #model #modeling #sampling #spectroscopy #accretionary #accretionarymargin #plateboundary #trench #interpretation #peneplanation #forearc

  10. "#Agricultural runoff provides perfect nutrients for #methanogen growth.

    #Fertilizer and animal waste washing into ocean systems creates nutrient-rich zones where these methanogens thrive like never before. #Nitrogen and #phosphorus pollution from farmland creates ideal conditions for explosive #microbial growth in #coastal waters and #DeepOcean areas. These agricultural inputs essentially act as fertilizer for #methane-producing microbes, creating a connection between #IndustrialFarming and atmospheric #GreenhouseGas levels that scientists never fully appreciated.

    "Coastal regions near major agricultural areas show the highest concentrations of these supercharged methanogens, with some areas recording methane production levels ten times higher than baseline measurements. The problem compounds itself because areas with intensive farming also tend to have the strongest ocean currents, meaning these fertilized methanogen populations get distributed globally. Every season’s #AgriculturalRunoff creates new opportunities for these microbes to establish thriving colonies in previously stable ocean environments."

    msn.com/en-us/weather/topstori

    #DeepSeaLife #AgriculturalRunoff #BigAg #OceansAreLife #OceanCurrents #OceanMethane