Lmst

Large Drainage Systems Produced Half Of Mars’ Ancient River Sediment
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https://doi.org/10.1073/pnas.2514527122 <-- shared paper
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https://www.thebrighterside.news/post/scientists-discover-16-giant-river-networks-on-ancient-mars-where-life-could-have-thrived/ <-- shared technical media article
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#water ##hydrology #dynamic #planet #Mars #extraterrestrial #ecosystems #drainage #landform
#drainageways #drainagesystems #Martian #terrain #geomorphology #geomorphometry #catchments #fluvia #pluvial #river #sediment #solarsystem #sedimentarybasins #life #habitable #sedimenttransport #topography #erosion #impact #crater #GIS #spatial #mapping #remotesensing #spacecraft #MRO #marsobservation #exploration #martian #MarsAttack

Light Detection And Ranging Of Natural Systems
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https://doi.org/10.1038/s43586-025-00446-3 <-- shared paper
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['primer'/'tutorial'/overview]
#GIS #spatial #mapping #remotesensing #explanation #tutorial #overview #primer #LiDAR #laserscanning #survey #pointcloud #spatialanalysis #airborne #satellite #usecase #vegetation #forest #forestry #resource #wildfire #fuel #elevation #topography #bathymetry #glaciology #glacier #workflow #naturalsystems #applications #algorithms #sensors #geomorphometry #geomorphology #drone #UAV #water #hydrology #groundbased #instrumentation #spatiotemporal #landsurface #landcover

There are many ways to represent the spatial anisotropy of terrain forms.
In this case, I focused on a comparative approach: the real surface area of different geomorphon classes plotted against slope aspect.

All calculations were performed within the polygon of the effective catchment area of the Inhulets River.
This visualization highlights how specific landform types tend to “align” with certain aspect directions, revealing structural asymmetries within the catchment.

#Geospatial #Geomorphometry #TerrainAnalysis #RStats #DataViz #Hydrology #SAGA #EnvironmentalScience #GIS #RemoteSensing #InhuletsRiver #ggplot2 #Copernicus #CopernicusDEM #Geomorphology

Polar plots of surface area by geomorphon type and slope aspect. Each panel shows the real surface area (km²) of a particular geomorphon class distributed across eight aspect categories (N, NE, E, SE, S, SW, W, NW). Calculations performed within the effective catchment polygon of the Inhulets River.

Mapping Current And Future Flood Exposure Using A 5 Metre Flood Model And Climate Change Projections [Vancouver, Canada]
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https://nhess.copernicus.org/articles/24/699/2024/ <-- shared technical article
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https://www.theguardian.com/environment/2021/nov/17/pacific-north-west-flooding-british-columbia-washington-state-canada <-- shared 2021 technical media article, PNW flooding
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[this post should not be considered an endorsement of a specific vendor, etc]
#water #hydrology #flood #flooding #risk #hazard #Vancouver #BritishColumbia #Canada #climatechange #extremeweather #localfloods #GIS #spatial #mapping #riskassessment #spatialanalysis #floodexposure #riskmapping #model #modeling #floodriskmanagement #riskmanagement #naturaldisaster #rainfall #precipitation #stormsurge #hazardmapping #floodmapping #floodrisk #infrastructure #cost #economics #fluvial #pluvial #geomorphology #elevation #geomorphometry #regulatory #regulations #spatiotemporal

I try to keep my results accessible even for readers who aren’t familiar with digital mapping or GIS.
One simple technique is to complement classification maps with clear charts and tables showing how much area each class occupies.
Here’s an example: the total surface area of geomorphon classes within the study region.

There’s also a small but important detail that often gets overlooked: the order of classes in the chart should match the order used in tables and map legends.
This tiny consistency makes it much easier for readers to orient themselves and follow the logic of the analysis.

#GIS #Geomorphometry #DataViz #OpenScience #RStats #terra #QGIS #InhuletsRiver #ggplot2 #SAGA #FOSS

Total surface area of geomorphon classes within the study region. Values are shown in square kilometres.

Rethinking Policy On High Mountain Cascading Hazards
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https://doi.org/10.1038/s41561-025-01834-w <-- shared technical correspondence
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https://ethz.ch/en/news-and-events/eth-news/news/2025/05/what-eth-glacier-researchers-know-about-the-collapse-of-the-birchgletscher-glacier.html <-- shared technical article, “What ETH glacier researchers know about the collapse of the Birch Glacier”
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#cryosphericscience #geomorphology #geomorphometry #engineeringeology #hydrology #naturalhazards #planning #mitigation #risk #hazard #policy #massmovement #risk #hazard #change #infrastructure #flood #flooding #damage #cost #geology #massmovement #naturalhazards #disaster #snow #ice #glacier #melting #climate #warmer #BirchGlacier #Switzerland #avalanche #Blatten #Nepal #SetiKohla #publicsafety #warning #GLOF #Chamoli #India #Sedongpu #Tibet #cascading #water #hydrology #slope #landslide #global

🌊 Hydrological patterns in the Inhulets River Basin

I’m working on a large-scale study of the technogenic impact on the Inhulets River system (Ukraine).
The workflow combines R + SAGA GIS + QGIS for geomorphometric and hydrological analysis.

Over the past week, I’ve been refining digital elevation models and tracing surface runoff connectivity — not an easy task in a region reshaped by century of mining.

The map below shows one of the calmest and most “well-behaved” areas, far from the mining zone.
As for the drainage network over the mining areas… let’s just say it’s geological chaos down there 😄

🛰️ Data: Copernicus DEM (GLO-30)
🧭 Tools: SAGA GIS (Terrain Analysis), R, QGIS

#Hydrology #Geomorphometry #SAGAGIS #QGIS #RStats #DEM #GIScience #EnvironmentalModeling #MiningImpact #Geodata #InhuletsRiver #Ukraine #KryvyiRih #Copernicus #CopernicusDem

Extracted drainage network and real surface area patterns for the western part of the Inhulets Basin. Generated in SAGA GIS using the Terrain Analysis module.

Over the past few days, I’ve been refining a detailed hydrological model for the Inhulets River basin (Ukraine).

The goal is to reconstruct real surface-flow connectivity in a region with both natural and technogenic relief — open-pit mines, tailings ponds, subsidence zones, and artificial drainage structures.

The work is part of a larger multi-year study on the geochemical and hydrological evolution of the Kryvyi Rih Iron Ore Basin.

(attached: 3D terrain visualization)

#Hydrology #Geomorphometry #opensourcegis #InhuletsRiver #SagaGis

Hydrological network and flow accumulation over a 3D digital terrain model

From fields to surface-specific points, geomorphons, and networks: David O’Sullivan’s latest post in his “GIS, a Transformational Approach” series explores how geospatial data transitions between continuous #fields and discrete forms like #points, #lines, and #areas. Using #geomorphometry concepts such as...
https://spatialists.ch/posts/2025/10/25-from-fields-to-surface-specific-points-geomorphons-and-networks/ #GIS #GISchat #geospatial #SwissGIS