Hongbo Ma

The crowd from the sky in San Francisco for @standupforscience.bsky.social

Why do scientists choose science as a career? A lab coat provided some answers at #StandUpForScience2025 in Denver—learn more about the coat and its owner here. eos.org/articles/cro...

Thousands gather across U.S. in Stand Up for Science events Scientists rally across the country in response to layoffs and funding cuts ordered by the Trump administration

Breaking news: Thousands of researchers and their supporters, including recently fired federal workers, have gathered across the U.S. in response to layoffs and funding cuts ordered by the Trump administration. scim.ag/41zlPv4

Stunning image shows the closest ever Einstein ring Albert Einstein himself thought that the eponymous Einstein ring would be impossible to observe, but the Euclid telescope has picked one up just 600 million light years from Earth

Wow. Just wow.
www.newscientist.com/article/2467...

also compared to the land subsidence due to low groundwater table, the liquefaction of structures can be well mitigated and even prevented if the stucture engineerers are well of the risk.

Particularly when the restored region is prone to earthquake-induced liquefaction, which is basically all silty-sandy alluvial deposited landform with the earthquake possibility. 😂😂😂

6 and the last. While we should not underestimate the benefits of groundwater restoration (to ecology and ground subsidence mitigation), its unanticipated risk should raise more awareness for local residents, structure designers, and risk evaluators.

5. Considering the similar urbanization process worldwide, i.e the pattern of the sync extraction-construction and a later restoration, this case provides a fair warning to (re)evaluate the earthquake risk of the region with recovering groundwater tables.

4. In this study, we used Beijing as a demonstration where the South-to-North Water Diversion Project （the world's largest）significantly recovered the previously low groundwater table. Its earthquake-induced liquefaction extent and severity has drastically increased

a cat is sitting inside of a glass container ALT: a cat is sitting inside of a glass container

3. As groundwater restoration projects kick in, the shallower, rising groundwater table facilitates a granular phenomenon called soil liquefaction whereby shaking ground builds up excessive pore pressure in the saturated soil, which loosens grain contacts and their strength.

2. During urbanization, groundwater extraction is usually the first choice for the urban water supply, and its process syncs with the construction of most urbanizing structures on a lowering groundwater table

Rising groundwater table due to restoration projects amplifies earthquake induced liquefaction risk in Beijing - Nature Communications The authors find that groundwater table recovery leads to a remarkable increase in seismic liquefaction risk in Beijing. The findings highlight the necessity to consider the influence of rapid groundw...

1. How can the restored groundwater table change the earthquake risk? Our work published at
@NatureComms
made the first cut on this issue. (shorturl.at/orgnj) In short, the restored groundwater table INCREASES earthquake-induced liquefaction extent and severity. a thread

In 2006, we determined that climate change would drive "consistent shifts in Santa Ana events from earlier to later in the season" and said this "may significantly increase the extent of CA coastal areas burned by wildfires, loss of life, and property."

Here we are today.... @umairfan.bsky.social

five men and one woman surrounding a man -with many showing a thumbs up- in a bar setting

#AGU2024 has come and gone. Super^100 fun to celebrate @agunn.bsky.social Andrew Gunn with other past Leopold awardees @dougjerolmack.bsky.social @sedimentdynamics.bsky.social @jscheingross.bsky.social (Hongbo Ma Joel Scheingros Jeff Nittrouer Isaac Larsen Doug Jerolmack). My voice is still gone!

A group of men and women singing and some with guitars. Luna Leopold, a famous geomorphologist is the one standing among his family. Photo is from the Aldo Leopold Foundation (dated 1966)

#AGU2024 @agunn.bsky.social will awarded the Luna B. Leopold award (+ giving the Sharp Lecture) & has agreed to help restart an EPSP tradition (thx @sedimentdynamics.bsky.social & Ajay Limaye)- a hearty celebration of all of the #EPSP awardees (Andy Wickert -YEAH!) starting ~9PM Th @ Lost & Found

With the separation of two layers and water detrainment mechanism, the lower layer can propagate 100's to 1000's of km without overthickening (dissipation of stratified structure), whereas previous model can only simulate 10's of km flow propagation.

This destrainment mechanism is embedded at the interface between two layers: a gravity-driven, faster, lower layer that contains most of the sediment and a slower upper layer that almost has not sediment.

We identify a water destrainment mechanism in which sediment settling fights back against the turbulent mixing, maintaining a slowly thickening layer, sometimes a subsiding layer.

Previous models suffer from the overthickening of the turbidity current layer and thus fail to confine the flow in the channel for 100's of km, except adding a overspill mechanism.

🚨Preprint Alert🚨

We develop a new layer-averaged, two layer formulation for long-runout turbidity currents!

Overthickening⚔️NO!
Overdilute⚔️NO!

A simple model for fluid and morpho-dynamics of long-runout turbidity currents.

Check it out!
shorturl.at/H2eW7

The brief history of meandering of the Rio Mamoré, Bolivia, as seen in Landsat data (playing with some new tools)

wow, thank you Jill! I cannot use this plate anymore as CA requires a numbered front plate. But this is my favorite one

FB reminded me of this post from 4 years ago - spotted on a car at UARK. Fittingly it was @sedimentdynamics.bsky.social ‘s car - the 2023 Luna B. Leopold awardee. Clearly he did and does science the crap out of this and that