#physicalgeography — Public Fediverse posts on home.social

💧🌏 Greg Cocks @GregCocks · 2026-09-09 · 04:01 UTC

Detection And Mapping Of Daya Features In The Limestone Plateau Of Northwest Egypt
--
https://doi.org/10.1177/03091333261480882 <-- shared paper
--
https://doi.org/10.1007/s41207-024-00477-4 <-- shared paper
--
H/T @wael Galal | Geologist at Geology Department, Assiut University
“[The author’s] study systematically investigates ‘DAYAS’ shallow, ephemeral wetlands scattered across the limestone plateau of Northwest Egypt. Previously undocumented in Egyptian territory, these saucer-shaped depressions play a vital role in regional hydrology and karst evolution.
Through an integrated approach combining Sentinel-2 satellite imagery, multi-decadal Landsat time-series analysis (1984-2025), ALOS PALSAR DEMs, and extensive field validation, [they] identified and mapped 5,430 daya features covering 258.1 km² achieving 91% classification accuracy.
[Their] research established a typological framework distinguishing bowl-shaped, small flat-bottom, and large flat-bottom dayas representing a continuum from active karst dissolution to relict, sediment-sealed systems. Critically, [they] documented a 32.63% net increase in daya surface area over 41 years, demonstrating that karst modification remains an active geomorphic process even under present-day hyper-arid conditions.
This work provides government agencies and water resource planners with the first high-resolution spatial inventory of these features essential baseline data for sustainable groundwater management, water-harvesting infrastructure, and conservation prioritisation in this water-scarce region…”
#Research #KarstGeomorphology #RemoteSensing #GIS #spatial #mapping #spatialanalysis #spatiotemporal #WaterResources #Egypt #Dayas #Sustainability #PhysicalGeography #water #hydrology #hydrography #wetland #daya #geology #limestone #karst #sentinel #Landsat #hydrogeomorphology #geomorphology #geomorphometry #arid #hyperarid #planning #policy #sustainable #groundwater #conservation

#research #karstgeomorphology #remotesensing #gis #spatial #mapping

💧🌏 Greg Cocks @[email protected] · 2026-09-09 · 04:01 UTC

Detection And Mapping Of Daya Features In The Limestone Plateau Of Northwest Egypt
--
https://doi.org/10.1177/03091333261480882 <-- shared paper
--
https://doi.org/10.1007/s41207-024-00477-4 <-- shared paper
--
H/T @wael Galal | Geologist at Geology Department, Assiut University
“[The author’s] study systematically investigates ‘DAYAS’ shallow, ephemeral wetlands scattered across the limestone plateau of Northwest Egypt. Previously undocumented in Egyptian territory, these saucer-shaped depressions play a vital role in regional hydrology and karst evolution.
Through an integrated approach combining Sentinel-2 satellite imagery, multi-decadal Landsat time-series analysis (1984-2025), ALOS PALSAR DEMs, and extensive field validation, [they] identified and mapped 5,430 daya features covering 258.1 km² achieving 91% classification accuracy.
[Their] research established a typological framework distinguishing bowl-shaped, small flat-bottom, and large flat-bottom dayas representing a continuum from active karst dissolution to relict, sediment-sealed systems. Critically, [they] documented a 32.63% net increase in daya surface area over 41 years, demonstrating that karst modification remains an active geomorphic process even under present-day hyper-arid conditions.
This work provides government agencies and water resource planners with the first high-resolution spatial inventory of these features essential baseline data for sustainable groundwater management, water-harvesting infrastructure, and conservation prioritisation in this water-scarce region…”
#Research #KarstGeomorphology #RemoteSensing #GIS #spatial #mapping #spatialanalysis #spatiotemporal #WaterResources #Egypt #Dayas #Sustainability #PhysicalGeography #water #hydrology #hydrography #wetland #daya #geology #limestone #karst #sentinel #Landsat #hydrogeomorphology #geomorphology #geomorphometry #arid #hyperarid #planning #policy #sustainable #groundwater #conservation

#research #karstgeomorphology #remotesensing #gis #spatial #mapping

Environment @[email protected] · 2026-08-20 · 07:05 UTC

Montana State researchers reconstruct environmental history of Yellowstone’s geyser basins

http://www.bozemandailychronicle.com offers au…
#Environment #cathywhitlock #charcoal) #Climate #coresample #EarthSciences #ecosystem #geothermalareasofyellowstone #geyser #lake #montanastateuniversity #naturalenvironment #naturalsciences #past #physicalgeography #Pine #pinuscontorta #plateau #scientist #Sediment #YellowstoneNationalPark #yellowstoneplateauvolcanicfield
https://www.europesays.com/3204742/

#yellowstoneplateauvolcanicfield #yellowstonenationalpark #sediment #scientist #plateau #pinuscontorta

UniversidadxClima @[email protected] · 2026-07-08 · 10:18 UTC

Dr Dominic Royé
@drxeo.eu :
'Los veranos en #España tampoco son como antes 🥵

El verano medio de 2021-2025 ya es 2,1°C más cálido que el de 1961-1965 (ref. 1961-1990). Y no solo sube la media: toda la distribución de días de verano se desplaza hacia la derecha, con más extremos y menos días fríos.

#CambioClimático #DataViz #PhysicalGeography
#bioclimatology
#calorextremo #calentamientoglobal