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nationalparksnationalparks@sfba.social
2026-01-19

Patterns of change along the northern California coast including Redwood National and State Parks. Learn more at nps.gov/redw/index.htm and agupubs.onlinelibrary.wiley.co and #nps #nationalparks #publiclands #photography #forest #trees #sun #winter Image credit Kurt Angersbach / Westernlabs #california #redwood #colors #landscapephotography #driftwood #coast #ocean #research #sediment #morphodynamic #tide

View of the coastal area of Redwood National and State Parks this weekend with sun, clouds, amenable tides, and the ongoing evolution of sediment properties and abundance. Here, we can see onshore rocks, a stretch of sandy beach, the green and yellow of the vegetation covering the slopes behind the beach, and a sky that is part cloudy and part blue. Temperatures were cool and a steady wind kept the day even cooler. The Pacific Ocean rolls in on the left. Waves were generally gentle throughout the weekend. The purpose of this image is in part to provide interested viewers with a snapshot of conditions should they be considering a visit to the area. Other resources for visitors include updated web camera images from the National Park Service and forecasts from the National Weather Service. The most important information for visitors is an understanding of the tide, as this area is inaccessible during times of higher tides.
Bibliolater 📚 📜 🖋bibliolater@qoto.org
2025-09-03

**Morphodynamic Foundations of Sumer**

"_We propose that tidal irrigation offers a plausible jumpstarting mechanism for high-yield, diversified agriculture providing an impetus for urbanization. As access to sea was restricted by delta build-up and tides shifted with the advancing deltaic coast, intensified reliance on mercurial river regimes eventually led to the expansive fluvial irrigation network of Early Dynastic city-states._"

Giosan L, Goodman R (2025) Morphodynamic Foundations of Sumer. PLOS ONE 20(8): e0329084. doi.org/10.1371/journal.pone.0.

#OpenAccess #OA #Research #Article #Sumer #Morphodynamic #Rivers #Irrigation #Paleooceanography #Agriculture #Academia

💧🌏 Greg CocksGregCocks@techhub.social
2023-12-27

Analysis Of River Bank Erosion By Combined Airborne And Long-Range Terrestrial Laser Scanning - Preliminary Results On The Vistula River [Poland]
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researchgate.net/publication/3 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #LiDAR #terrestrial #geomorphology #geomorphometry #VistulaRiver #Poland #river #riverbank #water #hydrology #model #modeling #HRDEM #spatialanalysis #morphodynamic #riverbed #crosssection #spatiotemporal #erosion

maps - study area - Vistula River, near Nieszawa, PolandMap of the study area. (a)-locations of the scanner position and the scanned area; (b)-river bank of section 3 in 2017; (c)-Nieszawa, Riegl VZ-4000 scanner during scanning (180° photo).photo - loading vehicles on car ferry across the Vistula Rivergraphics - Analysis of bank erosion of the part of section 3 in combined airborne and long-range terrestrial laser scanning (ALS and TLS). (a)-cross-section of ALS and TLS point clouds, 1 m thick (red dots are beams based on ALS); (b)-high-resolution digital elevation model (HRDEM) based on TLS; (c)-HRDEM of the river bank based on TLS-front view; (d)-HRDEM of the river bank based on ALS-front view; (e) and (f)-differential analysis of HRDEMs based on ALS and TLS (erosion in red).

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