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#geomorphology — Public Fediverse posts

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

  1. A Coastal Exposure Index For Ireland - Relative Hazard Exposure And The Protective Role Of Coastal Habitats
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    doi.org/10.1007/s11069-026-083 <-- shared paper
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    alturl.com/4e83i <-- shared webmap / data portal
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    independent.ie/irish-news/reve <-- shared media article
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    [“The index complements site-specific flood and erosion modelling.”]
    H/T @kevin Walsh | PhD Researcher at University College Cork
    “In this paper [1st link above], [the authors] seek to answer the question “what is the relative distribution of exposure to coastal hazards around the Irish coast, and where can coastal habitats potentially reduce exposure?”
    The method [they] chose to achieve this was the Coastal Vulnerability Model (CVM), within the InVEST software suite. This involves combining the key physical and climatic variables which can show us where along the coast might be most adversely affected by extreme winds, powerful waves and surges, and sea level rise.
    It also reveals the potential protection provided by coastal habitats, such as dunes and saltmarsh, as well as populations and sites of cultural heritage located within zones deemed “Very High Exposure”.
    [They] tested variations to the model, including seeing how the results change when certain variables are left out, what happens if we add in other variables, and how ranking choices impact exposure distribution. The results show that these choices, especially the ranking methods, can have large impacts on hazard distribution and the overall interpretation of the results. However, [they] found that the CVM quintile based approach was most suitable for Ireland, as it reveals high exposure sites on the east coast, which tends to be overlooked when different methods are applied.
    [The H/T] also prepared an interactive map, where you can view the results in detail [2nd link above]
    There’s a lot of work ongoing in this space around Ireland, [they] hope this will be a valuable contribution towards sustainable management of our coastline…”
    #spatialanalysis #exposure #coastal #hazards #mitigation #risk #Ireland #Irish #coast #CoastalVulnerabilityModel #CVM #InVEST #model #modeling #spatiotemporal #geostatistics #statistics #spatial #mapping #geomorphology #geology #climate #wind #wave #tidal #erosion #stormsurge #storms #ocean #sealevelrise #climatechange #extremeweather #dunes #saltmarshes #machair #seagrass #habitat #protection #vulnerability #parametersensitivity #exposure #sustainable #populationpressure #CoastalExposureIndex #culturalheritage #coastalzonemanagement #planning #policy #evidencebased #adaption #strategies

  2. As permafrost degrades due to climate warming, intensified chemical rock weathering in river catchments creates a geological carbon sink that can significantly offset the biological release of carbon dioxide.
    #Biogeochemistry #Climatology #Geomorphology #Hydrology #EarthScience #sflorg
    sflorg.com/2026/06/es06172602.

  3. Late Miocene Euphrates River Drained Into A Partially Desiccated Eastern Mediterranean
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    doi.org/10.1038/s41561-026-019 <-- shared paper
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    [the paleogeographic reconstruction is outstanding, including the strength and information conveyed so well in that figure, kudos!]
    H/T @lina Jakaitė-Darkšė
    “Although the Euphrates River - stretching ~3,000 km across Western Asia - has shaped the region’s geology for millions of years, the timing of its origin and the evolution of its course remain enigmatic. So far, two contrasting hypotheses have been proposed to explain the fluvial system’s Late Neogene path: termination in Anatolia at a palaeo-lake or the Mediterranean, or a southeastward continuation to Arabia. Here [they] use seismic-reflection and topographic data to show that two previously identified sedimentary accumulations - deposited during the terminal phase of the Late Miocene Messinian salinity crisis - resulted from dual riverine systems that drained into a partially desiccated eastern Mediterranean before avulsing toward the Persian Gulf and converging to form the modern Euphrates River. From probabilistic sediment-budget modelling, [they] show that although the latest Messinian drainage basins were an order of magnitude smaller than their present-day extents, the total palaeo-discharge exceeded that of the modern Tigris, Euphrates and Nile rivers combined, indicating intense palaeo-precipitation and high palaeo-relief. These results suggest that plate-margin deformation both controlled the fluvial avulsions that diverted the Euphrates River from the Anatolian–Eurasian Plate to the Arabian Plate, and established the conditions necessary for the development of the alluvial Fertile Crescent…”
    #water #hydrology #hydrography #paleogeography #Euphrates #river #Miocene #reconstruction #spatialreconstruction #geology #change #erosion #MiddleEast #spatialanalysis #spatiotemporal #Neogene #Anatolia #paleolake #Mediterranean #Arabia #Messinian #remotesensing #model #modeling #topography #hydrogeomorphology #geomorphology #PersianGulf #sediment #paleodischarge #volume #Tigris #elevation #platetectonics #structuralgeology #platemargin #fluvial #avulsion #FertileCrescent

  4. Neogene Uplift Of The Chiribiquete Tabletop Mountains In The Colombian Amazon And Its Paleobiogeographic Implications
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    doi.org/10.1016/j.palaeo.2026. <-- shared paper
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    H/T Richard F. Ott
    “The Chiribiquete are table top mountains located deep in the Colombian Amazon and host many rare endemic species. Helanlin Xiang's work shows that the Chiribiquete Mountains likely upifted before the Early Miocene and could have acted as a long-lived stepping stone, connecting species in the Andes with the Guyana Shield…”
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    #Miocene #Paleogeography #Palynology #Amazonia #Caquetá #paleobiogeography #Columbia #Amazon #jungle #geomorphology #neogene #uplift #geology #structuralgeology #tectonics #Chiribiquete #tabletopmountains #Andes #GuyanaShield #dating #isotopes #biome #ecosystem #tepui #elevation #sedimentology #stratigraphy #Araracuara #fluvial #lacustrine #deposition orogeny #regional #uplift #drainage #hydrography #hydrology #river #network #GIS #spatial #mapping #spatialanalysis #spatiotemporal #geophysics #seismology

  5. How much does landform position matter for vegetation dynamics across Calgary?

    I explored how ΔNDVI (2025-2024) varies across geomorphon classes (summit, ridge, slope, hollow, valley, etc.) using a large spatial dataset (~194k observations).

    A few key points from the analysis:
    • Non-parametric Kruskal–Wallis test shows statistically significant differences between geomorphons
    • However, the effect size is moderate (ε² ≈ 0.04)
    • Distributions strongly overlap — landform position matters, but it is not a deterministic driver
    • Median ΔNDVI tends to be higher in lower landscape positions (hollows, footslopes, valleys), consistent with moisture and accumulation controls

    #EnvironmentalData #RemoteSensing #NDVI #LandscapeEcology #Geomorphology #DataAnalysis #RStats
    #ReproducibleResearch #Calgary #GreennessOfCalgary #Sentinel2

  6. 🏔️ How high is your community?

    Using the MRDEM-2024 elevation model, I mapped the average elevation for each Calgary community.
    The result clearly shows how the city “steps down” from the western uplands toward the Bow and Elbow River valleys in the east and south.

    🔹 The highest areas — around Tuscany, Rocky Ridge, and Cougar Ridge — rise over 1,240 m above sea level.
    🔹 The lowest zones — Shepard, McKenzie Towne, and parts of the southeast — drop to about 1,000 m.

    It’s a great reminder that Calgary’s landscape still reflects its glacial past — a city built on terraces, slopes, and ancient river plains.

    #Calgary #Alberta #Geography #Geospatial #QGIS #OpenData #UrbanGeography #DataVisualization #Topography #Geomorphology #Canada #DEM

  7. Estimating Increased Transient Water Storage With Increases In Beaver Dam Activity
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    doi.org/10.3390/w16111515 <-- shared paper
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    “Dam building by beaver (Castor spp.) slows water movement through montane valleys, increasing transient water storage and the diversity of residence times. In some cases, water storage created by beaver dam construction is correlated to changes in streamflow magnitude and timing. However, the total amount of additional surface and groundwater storage that beaver dams may create (and, thus, their maximum potential impact on streamflow) has not been contextualized in the water balance of larger river basins..."
    #water #surfacewater #groundwater #infiltration #river #basin #hydrology #natural #beaver #wildlife #habitat #ecosystem #waterstorage #waterresources #waterbalance #streamflow #snowwaterequivalent #snowmelt #beaverdams #geomorphology #montane #landscape #landforms #basin #watershed #drainage #HAND #spatialanalysis #spatiotemporal #model #modeling #spatial #MODFLOW #reservoir

  8. Homoclinal ridge (Geomorphology 🏞️)

    A homoclinal ridge or strike ridge is a hill or ridge with a moderate, generally between 10° and 30°, sloping backslope. Its backslope is a dip slope, that conforms with the dip of a resistant stratum or strata, called caprock. On the other side of the other slope, which is its frontslope, of a homoclinal ridge is a ...

    en.wikipedia.org/wiki/Homoclin

    #HomoclinalRidge #Ridges #Geomorphology #SlopeLandforms #ErosionLandforms #StructuralGeology

  9. Reading Material With Lunch, Etc – Getting Back To My Roots
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    doi.org/10.4324/9780429270284 | Thornes, J. B., Brunsden, D. (1977). Geomorphology and time. London: Methuen
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    I saw this book on another post - and so went and found a copy at a 2nd hand book shop…
    Looking forward to lunches at work with a cup of tea and maybe a couple of rainy Sundays at home…
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    #geomorphology #text #book #landforms #learning #refamiliarisation #readingforpleasure #framework #model #processes #geology #water #hydrology #weather #climate #erosion #time #spatialanalysis #spatiotemporal #temporal #qualitative #quantitative #change #stochastic #evolution