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environnement·EnvironnementbyHadriscus

La "crue soudaine" au Népal était prédite par une étude de 2025

En faisant des recherches sur l'origine de la catastrophe qui a eu lieu au nord de Kathmandu, je suis tombé sur cette étude publiée l'année dernière en juillet (dans le Journal of Tourism and Himalayan Adventures) qui étudie tout particulièrement le lag glaciaire de Lirung Langtang (le lac en cause dans l'évènement) et conclut à l'existence d'un risque élevé de GLOF -glacier lake outburst flood, c'est-à-dire précisément ce qui s'est passé.

Je copie ici l'abstract :

Glaciers are natural reservoirs of freshwater that cater to the millions of people in a mountainous country like Nepal. However, these freshwater sources are retreating at an alarming rate, altering the downstream flow. Furthermore, this has led to an increase in glacial lake areas and their number, which may eventually be at risk of Glacial Lake Outburst Floods (GLOFs). This study focuses on the expansion of Lirung Glacial Lake in the Langtang Basin from 2010 to 2024, utilizing multi-temporal satellite imagery from Landsat and Sentinel. The Normalized Difference Water Index (NDWI) was applied to delineate lake boundaries, which were then analyzed in conjunction with climate data from the basin. The result shows that over 14 years, the lake’s area has increased at an approximate rate of 0.0035 km² per year from 1.55 km² in 2010 to 6.36 km² in 2024, which is an increase of 60.8%, indicating significant glacier retreat. The mean annual temperature in the basin is increasing, and precipitation is slightly declining, which are conditions favorable for accelerated glacier mass loss. These findings underscore the heightened risk of GLOFs, with potential impacts on downstream communities and critical infrastructure, including Nepal’s only glacial lake-fed micro-hydropower plant. The study highlights the urgent need for continuous monitoring, community-based early warning systems, and adaptive water resource management to safeguard mountain communities and their livelihoods in the face of climate change.

Grosso modo, il a été observé que le lac a augmenté en surface sur les quinze dernières années et qu'un débordement est imminent, entraînant des risques pour les personnes ainsi que pour "la centrale hydroélectrique".

Ça me rend fou quand je vois que c'est étudié, connu, prédit (!) et que rien n'a été fait. En tout cas pas suffisamment.

https://www.nepjol.info/index.php/jtha/article/view/80918/Open linkView original on jlai.lu
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fuckcars·Fuck CarsbyHadriscus

[discussion] Another preventable accident near our home

Someone drove into a family this evening. Two boys are severely injured. I'm shaking because it happened super close and it could have been anyone I know, or me.

There's a big proportion of absurdly dangerous drivers here in Mayotte. Most people drive okay, and there's a few fine & courteous drivers too. But this small demographic endangers everybody else.

On an island without curbs, where the rainy season makes every road muddy and slippery, where entire families routinely go to the mosque and back on foot twice a day, there's also dicks in audis, cunts in huge jeeps, and neither get the hint. It's small villages throughout, a few extended families, everybody knows everybody. The fucker is still being deincarcerated from his 2 ton metal box. You can be sure he will be shunned for the rest of his life. But that's a meager consolation. It could have been me, it could have been my wife, it could have been any of the kids I know from the neighbourhood,...

I needed to get this off my chest. God, really, genuinely fuck cars.
Be safe,

Hadri

View original on jlai.lu
61

Issues booting after trying to install nvidia drivers

Hi folks,

I have a problem, a big problem. I have posted a thread over at the Debian forums, but I'm unfortunately in a hurry (my workstation is bricked) so I'm going to cross-post it here ([email protected] kindly redirected me to this community for help).

I'm going to paste the text from the Debian help thread below, hopefully someone has an idea how I can pull myself out of this mess.

Quite a bit has happened, so I'll give you a short version with what I think is essential information, and if you need other details please do ask.

Essentially, I tried getting the nvidia driver on a fresh Trixie install using this tutorial (https://fostips.com/install-nvidia-driver-in-debian-13/). I reached the part where it says "After reinstalled the driver, restart your computer.", that's when the terminal turned blue and told me with big centered text that the free driver (?) was already installed and it's conflicting with the new one I am trying to install, but I just need to reboot in order to solve the conflict. So I rebooted and I was greeted by the following prompt.

This goes nowhere, it never boots into Debian. Thinking I had broken Debian, I thought to myself, no big deal, Debian had an issue anyways (see https://forums.debian.net/viewtopic.php?p=827488), I'll try another random distro (Bazzite) see if it helps. But after installing Bazzite over Trixie, I got the following prompts at boot :

(this one is a bit blurry, it says "Verification failed: (0x1A) Security Violation")

If I go for "Continue boot" it just cycles over and over again on these prompts. And I don't know what to make of the other choices here.

I can see it's related to the operation I did with the nvidia driver, but I don't understand how the problem wasn't solved by wiping my drive with another distro ? twice... now I have tried with Nobara as well, only to get the same prompts. How can I solve this issue ? my computer is bricked and I really hope that's fixable. Anyone has a clue ?

Like I said, don't hesitate to ask if there's something I haven't said...

Cheers,

View original on jlai.lu
13
proceduralgeneration·Procedural GenerationbyHadriscus

[OC] Procedural painted islands

A procgen weekend project in Blender and geometry nodes. The idea was to start from a simple painted map -as simple and childlike- as possible, and let the computer do the rest.

Some images of the process :

Extract map contours

Separate seafloor from land

Look at the distance to shore

Filter it some

A voronoi for the rocks

Masked so they only appear near the shore

Roughly the same approach for the seafloor

A couple materials, water surface, Nishita sky

Cheers !

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