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#catchments

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Public
💧🌏 Greg Cocks

Physically-Based Hydrologic Modeling Using GRASS GIS - r.topmodel [tutorial]
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workshop.isnew.info/omu-2024-r <-- link to technical resource / workshop / tutorial
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“This workshop will introduce r.topmodel (Cho 2000), the GRASS GIS module for a physically-based hydrologic model called TOPMODEL (Beven 1984)..."
#GIS #spatial #mapping #water #hydrology #Hydrologic #model #Modeling #GRASS #GRASSGIS #topmodel #workshop #tutorial #onlinelearning #TopographyModel #catchments #R #SAGA #module #ISPSO #particleswarmoptimization #algorithm #continuingeducation

screen shot - map / model details - catchments/watersheds overlain with stream vectors
screen shot - selecting study area in USGS's StreamStats online interface
screen shot - selecting NHD data for download in the USGS's TNM online interface
screen shot - splash screen - GRASS GIS + r.topmodel model example
Public
💧🌏 Greg Cocks

Avoid Backtracking And Burn Your Inputs - CONUS-Scale Watershed Delineation Using OpenMP
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doi.org/10.1016/j.envsoft.2024 <-- shared paper
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“HIGHLIGHTS
• A memory-efficient watershed delineation algorithm was introduced.
• The new algorithm uses a node-skipping depth-first search to save memory.
• Both input and output data are stored in a shared matrix to reduce required memory.
• It performed 95% faster than its CPU benchmark algorithm using 33% less memory.
• It can solve 50% larger problems than what the CPU benchmark algorithm can handle..."
#GIS #spatial #mapping #hydrology #water #code #algorithm #watershed #delineation #OpenMP #opensource #memory #efficient #CPU #benchmark #MESHED #model #modeling #largescale #catchments

photo - river flowing through incised terrain
graphic abstract - Memory-Efficient Watershed Delineation (MESHED)
figure - Illustration of self-destructiveness. Numbers indicate the discovery order of each cell from [paper's] Fig. 1(c). W is the watershed ID for the outlet. See [paper's] Fig. 1(a) for cell IDs.
figure - Illustration of NSDFS. Blue arrows indicate flow directions and the red cell is the outlet cell. Green and yellow cells have an NIDP of 0 and 1, respectively.
Public *
💧🌏 Greg Cocks

83% Of English Rivers Have Evidence Of High Pollution From Sewage And Agriculture
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theguardian.com/environment/20 <-- shared media article
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#GIS #spatial #mapping #watersecurity #waterquality #UK #england #britain #pollution #sewerage #citizenscience #watertesting #monitoring #communityengagement #angling #anglers #spatialanalysis #AnglingTrust #regulations #EUstandards #brexit #ecosystems #habitat #fish #biology #farming #agriculture #runoff #fertiliser #watercompanies #privateindustry #phosphate #phosphates #ecology #healthy #failure #aquatic #habitatloss #forprofit #algae #algalbloom #policy #planning #neglect #politics #water #hydrology #catchments #pollutionstandards #rivers #streams
@AnglingTrust

photo - dead fish and eels in a polluted English stream
photo - pollution in a river
photo - pollution in a river
photo - sewage and pollution floats on flood water on Cookham Moor in Berkshire
Public
The Big Data Cluster

As snow falls and daylight dims, the final sessions of #AGU22 begin. We're settling in for a few hours of Catchment and Critical Zone Science – Understanding Ecosystems Through Monitoring, Analysis, and Experimentation.

🔗 🗓️ : bit.ly/3hDEYch

Convened by Big Data Cluster collaborator Jamie Shanley and features a wide range of #CriticalZone research questions looking at #watershed #catchments

Snowy building, the cement is slick with melted snow.
Conference room inside a building.
#hydrology#biogeosciences
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