#braided — Public Fediverse posts on home.social

💧🌏 Greg Cocks @[email protected] · 2026-07-21 · 03:13 UTC

Impact of River Morphology on River–Groundwater Exchange in Braided River Systems
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https://doi.org/10.1111/gwat.70092 <-- shared paper
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H/T @thomas Wöhling | Professor at TU Dresden
“Do you like braided rivers? We think they are soooo beautiful. And they are interesting to study as well. Particularly how these complex and transient systems interact with regional aquifers…”
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“Coupled models of two braided rivers with real, pre- and postflood event morphologies are studied for river–groundwater exchange changes…”
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“Braided river systems are an important source for groundwater recharge, but their complex morphology makes river–groundwater exchange fluxes difficult to estimate. Their river channel morphology changes frequently after floods, which has effects on recharge rates that have rarely been studied in the past. This work aims to isolate the effects of changes in braided river morphology on groundwater recharge for two sections of the Wairau River and Waikirikiri River in New Zealand. For each study site, two different river morphology variants of a fully coupled surface water–groundwater model utilizing high-resolution DEMs of river bathymetry before and after a major flood event were set up while keeping parameterization and boundary conditions the same. The models demonstrate that flood-induced morphology changes in braided river systems alter groundwater recharge. [They] identif[ied] features, both simulated and observed, that explain the direction of change. Features that increase groundwater recharge are a larger braidplain aquifer extent and volume, larger wetted area and, specifically, an increase of areas with high exchange rates in locations of larger gradients between braidplain aquifer and regional aquifer. These factors influence groundwater recharge independent of connection (Wairau River) or disconnection (Waikirikiri River) of the system to the regional aquifer, albeit with different magnitudes. An extension of [their] research to other braided rivers is needed to more broadly generalize [their] findings...”
#NewZealand #river #morphology #braided #Waikirikiri #Wairau #water #hydrology #hydrography #model #modeling #groundwater #aquifer #waterresources #recharge #infiltration #flood #flow #flooding #hydrogeomorphology #exchangefluxes #surfacewater #remotesensing #DEM #elevation #spatialanalysis #GIS #spatial #mapping #change #dynamic #spatiotemporal #bathymetry

#newzealand #river #morphology #braided #waikirikiri #wairau

💧🌏 Greg Cocks @[email protected] · 2025-12-13 · 05:36 UTC

SWOT Satellite - A New Tool for Fluvial Geomorphology
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https://doi.org/10.1130/GSATG630A.1 <-- shared technical article
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#GIS #spatial #mapping #water #hydrology #SWOT #remotesensing #fluvial #geomorphology #earthobservation #satellite #spatialanalysis #spatiotemporal #surfacewater #inSAR #radar #elevation #USA #braided #rivers #dams #failures #kickpoints #monitoring #change #dynamics

#gis #spatial #mapping #water #hydrology #swot

💧🌏 Greg Cocks @[email protected] · 2025-11-25 · 03:16 UTC

Low Sinuosity Meandering Rivers Before Vascular Plants - Cambrian Tapeats Formation, Arizona, USA
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https://doi.org/10.1130/B38336.1 <-- shared paper
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#water #hydrology #Arizona #bars #braided #streams #Cambrian #channels #clastic #conglomerate #floodplains #fluvial #hydromorphology #sedimentation #landscape #LowerCambrian #meander #mechanism #migration #mudstone #Paleozoic #Plantae #pointbar #rivers #sandstone #sedimentary #Silurian #sinuosity #UnitedStates #USA #TapeatsFormation
@GSA

#water #hydrology #arizona #bars #braided #streams

Alaska Native News @[email protected] · 2024-09-16 · 13:46 UTC

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Braided Seal Gut — Qiluryaq
Taugkut qiluryat ekllinartut. – Those braided seal gut look delicious.

Visitors to Kodiak often ask how Alutiiq people can hunt protected species like sea otters and sea lions. In 1972, the Marine Mammal Protection Act prohibited the harvesting of all marine mammals to preserve their populations. However, this law recognizes the importance of sea...
https://alaska-native-news.com/75706-2/75706/
#braided-seal-gut #alutiiq #Wordoftheweek #museum

#braided #alutiiq #wordoftheweek #museum

💧🌏 Greg Cocks @[email protected] · 2024-07-26 · 08:41 UTC

Thomsen River Estuary, Banks Island [NASA Earth Observatory Daily Image]
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https://earthobservatory.nasa.gov/images/147560/thomsen-river-estuary-banks-island <-- link to NASA Earth Observatory image
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[photos in the main from 2015]
#GIS #spatial #mapping #remotesensing #OLI #hydrology #water #sediment #arctic #ocean #climatechange #ArcticOcean #landsat #landsat8 #BanksIsland #Aulavik #ice #snow #permafrost #tundra #Canada #ThomsenRiver #estuary #sedimentation #erosion #braiding #braided #hydrodynamics #geochemistry #geology #acidification
@nasa

#gis #spatial #mapping #remotesensing #oli #hydrology

Niles Johnson @[email protected] · 2023-12-19 · 13:49 UTC

New paper 🎉🎉
About coherence 🥱💤⁉️

joint work with Nick Gurski
https://arxiv.org/abs/2312.11261

The title is:
Universal pseudomorphisms, [*deep breath*]
with applications to diagrammatic coherence for braided and symmetric monoidal functors 🙃😸

I've always thought coherence theorems sound boring, but actually they're good! In this paper we take a problem that is hard (coherence for structured functors), do a *bunch* of really abstract stuff (2-monad theory), and come out with a solution that makes your life* significantly better.

[*Here, "your life" means the part of your life you spend checking diagrams of braided monoidal functors. Or, more generally, pseudomorphisms for algebras over a 2-monad.]

Almost 1/5 of this paper is dedicated to real, genuine examples, and that's what I want to focus on below. I'll say just a bit about the more abstract machinery on which the examples are based. If you've been following along, this is the culmination of my series "weird facts about monoidal functors and coherence" [1,2,3,4].

[1] https://mathstodon.xyz/@nilesjohnson/110741323263984146
[2] https://mathstodon.xyz/@nilesjohnson/110876487813747736
[3] https://mathstodon.xyz/@nilesjohnson/110979458364785667
[4] https://mathstodon.xyz/@nilesjohnson/111070640771166081