Arsh Grewal
@akgrewal.bsky.social
85 followers 93 following 11 posts
Watershed Hydrologist | Postdoc in the Watershed Science and Ecohydrology lab at Michigan State University
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Reposted by Arsh Grewal
matthiasprenger.bsky.social
Excited to share our new review in Reviews of Geophysics! We explored the latest advances in tracer-aided mixing models for studying water in the Critical Zone. We synthesize new tracer methods, models, & key insights. I think it'll be a valuable resource for the community doi.org/10.1029/2024...
Recent Advances in Tracer‐Aided Mixing Modeling of Water in the Critical Zone
Tracer-aided mixing models are uniquely capable of identifying water flow paths and sources within the Critical Zone Recent advances offer novel tracers and models for deeper and more accurate in...
doi.org
akgrewal.bsky.social
Thanks Erin Nicholls (not on blusky) for the ET processing and to everyone that helped with the fieldwork for this! @dbarrett867.bsky.social @snowhydro-ty.bsky.social @andrasszeitz.bsky.social
akgrewal.bsky.social
The youngest water in storage contributed to ET bc of shallow rooted veg. Results suggest new rain is stored in vadose zone & is disconnected from stream, bc of high field capacity in organic soils. Large rain events and rising water tables appear to mobilize this water, leading to mixing in storage
akgrewal.bsky.social
The SAS function for Q suggests preferential selection of water of intermediate ages during low flows, meaning that newer water does not preferentially contribute to stream. The SAS function was more uniform during high flows, potentially due to mixing in storage. (3/n)
akgrewal.bsky.social
Streamflow in spring was mostly snow water due to limited mixing with frozen storage. Melting ground ice in the active layer was a significant component of discharge post freshet. Tracer aided WB results show most of the snowmelt left as runoff and most of the rain exited the basin as ET. (2/n)
akgrewal.bsky.social
Hot off the press! New paper characterizing storage and release processes in two permafrost catchments with @theoryofciaran.bsky.social @seankcarey.bsky.social. We characterized these processes by closing the water balance, EMMA, and StorAge Selection Functions (1/n) doi.org/10.1029/2024...
Reposted by Arsh Grewal
hydrodoctorj.bsky.social
Low-relief catchments are super complex and awesome, but they have not received as much attention as our complex and awesome high-relief catchments. Here we show in a low relief catchment just how complex things can be and how spatial sampling frameworks help us solve stream chemistry mysteries!
carolineweidner.bsky.social
My first paper of my PhD research on catchment biogeochemistry in Michigan is live!

Wetlands, Groundwater and Seasonality Influence the Spatial Distribution of Stream Chemistry in a Low-Relief Catchment
agupubs-onlinelibrary-wiley-com.proxy2.cl.msu.edu/doi/10.1029/...
Reposted by Arsh Grewal
kinarnicholas.bsky.social
Hydrology Paper of the Day @gregverkaik.bsky.social @micaheckert.bsky.social @peatofmind.bsky.social on how changes to drainage and spatial burn patterns affected biogeochemical cycles and vegetation cover in a peatland: depth of burn, carbon loss, and burn severity in context of a fuel load model.
gregverkaik.bsky.social
Check our new paper “Fuel Loads and Peat Smoldering Carbon Loss Increase Following Drainage in a Forested Boreal Peatland” published in JGR-Biogeosciences: doi.org/10.1029/2024...
@micaheckert.bsky.social, Sophie Wilkinson, Paul Moore, and @peatofmind.bsky.social [1/9]
akgrewal.bsky.social
Thanks for the shout-out Doerthe!!
akgrewal.bsky.social
Thanks for the shout-out!
akgrewal.bsky.social
Greater permafrost extent led to increased seasonality in major ions, whereas stronger topographic gradients led to greater seasonality in DOC. This paper includes sites from Wolf Creek Research Basin as well as the Tombstone Waters Observatory! (3/3)
akgrewal.bsky.social
After accounting for Q, we found seasonality in both major ion and DOC concentrations at all sites. Our results suggest seasonal ground thaw primarily drives seasonality in major ions, whereas flushing of the organic layer during freshet may be an important driver of seasonal DOC (2/n).
akgrewal.bsky.social
If voters are the problem, what lead them to become the problem? I like to think we haven't adapted to the social media age yet. The 'whole truth' is there, but it's buried with misleading or incomplete info. I think over time, we will get better at sifting through the crap. That's the hope atleast.
Reposted by Arsh Grewal
hydrodoctorj.bsky.social
Deadline to apply is one week!
hydrodoctorj.bsky.social
Job Alert: Water Sciences Research Technician in @msunatsci.bsky.social working with two research groups. Full-time, career track. Great benefits. Deadline January 20, 2025. Complete position description and how to apply at careers.msu.edu/jobs/search. Search position number 1012771. Details below.
Search Page
careers.msu.edu
Reposted by Arsh Grewal
hydrodoctorj.bsky.social
Job Alert: Water Sciences Research Technician in @msunatsci.bsky.social working with two research groups. Full-time, career track. Great benefits. Deadline January 20, 2025. Complete position description and how to apply at careers.msu.edu/jobs/search. Search position number 1012771. Details below.
Search Page
careers.msu.edu
Reposted by Arsh Grewal
tetzlaffecohyd.bsky.social
We'll advertise 3 positions soon in our group, Berlin Germany 1 permanent scientist/groupleader position in ecohydrological modelling; 2 postdocs in ecohydrological modelling in #wetlands. Females- pls apply. Email me when you are interested. Check our groups webpage www.igb-berlin.de/en/tetzlaff
Landscape Ecohydrology | IGB
We aim to understand the ecohydrological functioning of catchments at different spatio-temporal scales, i.e. how and how long is water stored and released in landscapes. For this, we link landscapes a...
www.igb-berlin.de