💧🌏 Greg Cocks: "Evidenced Paleodrainages In De…" - TechHub

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Greg Cocks @GregCocks@techhub.social

Evidenced Paleodrainages In Desert Regions Of Saudi Arabia - Satellite Images With Field-Based Study
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https://doi.org/10.21203/rs.3.rs-4959129/v1 <-- shared paper
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#GIS #spatial #mapping #water #hydrology #streams #poroussediments #pebbles #RadarImages #SaudiArabia #MiddleEast #remotesensing #drainage #paleodrainage #desert #evidence #satellite #imagery #fieldwork #fieldchecked #Quaternary #Pleistocene #climatechange #geology #landform #geomorphology #arid #streamnetwork #PALSAR #ASTER #thermaldifferentiation #spatialanalysis #multispectral #sediment #lithology #hydromorphic #geomorphmetry #waterresources #usecase

maps and photo - Abrupt cut of drainages when reaching loose materials (e.g., sands) as revealed on a geologic map; the same location in the map is shown in the attached photo

annotated image maps - The images above show the current drainages existed on SRTM DEM; while the image below is a processed ALOS PALSAR image showing traces of delta-like shape paleodrainages (DPl); but they do not coincide with the current drainages in the SRTM DEM (image above). Triangle at point S1 is the site where the stratigraphic sequence was investigated.

photo - sand meets the rock outcrops, Hafar Al Batin desert

annotated image maps - he image above shows a shaded figure for an odd paleodrainage (OPl) as shown on the processed ASTER image. The same ASTER image was used below after projecting the current drainages extracted from STRM DEM. There is no coincidence between the OPl and the current drainages evidencing an invisible paleodrainage (OPl). Triangle at point S2 is the site where the stratigraphic sequence was investigated

Feb 05, 2025, 09:21 PM··Web

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