#debrisFlow

πŸ’§πŸŒ Greg CocksGregCocks@techhub.social
2025-04-08

Assessment Of Western Oregon Debris-Flow Hazards In Burned And Unburned Environments
--
doi.org/10.1002/esp.70045 <-- shared paper
--
[with more and more catastrophic wildfires, the engineering geology awareness and possible mapping of post-fire debris flow risk is important]
#GIS #spatial #mapping #wildfire #fire #oregon #risk #hazard #geology #geomorphology #risk #hazard #landslide #massmovement #landslide #postfire #soil #spatialanalysis #spatiotemporal #engineeringgeology #extremeweather #naturaldisaster #debrisflow #mechasisms #property #infrastrure #publicsafety #lossoflife #model #modeling #calibration #water #hydrology #inventory #hazardassessment #geomorphometry

2025-03-11

LAFD has info and maps for the various #Evacuation warnings they've issued for the coming rains and #DebrisFlow risks.

They've sent deputies into the field because while there are warnings for general areas, specific addresses will have mandatory evacuation orders. This is pretty smart really, and deputies can inform non-ordered addresses of risks, so educational.

lafd.org/news/evacuation-warni

Due to the forecasted high rains which have the potential to trigger mudslides and debris flows on March 12-13, the City of Los Angeles is issuing EVACUATION WARNINGS for several areas and limited, address specific Evacuation Orders which will go into effect from 7AM Wednesday (3/12/2025) to 6pm Thursday (3/13/2025)

πŸ’§πŸŒ Greg CocksGregCocks@techhub.social
2025-02-22
screen shot - grfintools software repository home page (https://code.usgs.gov/grfintools/grfintools)report figure 2 - Schematic flowchart illustrating common pathways for using Grfin Tools with examples identified in orange boxesreport figure 1 - Perspective view of topography illustrating the potential locations for three types of mass movements that can be derived from a Grfin Tools analysis.USGS report cover page - Grfin Toolsβ€”User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
2025-02-14

Cities turn into torrents of debris flows after bushfires and rain
All that is solid melts into air...
>>
sciencenews.org/article/danger
#FossilFuels #petrotopia #climate #infrastructure #fires #erosion #soil #sprawl #DebrisFlow

2025-02-14

Flash Flood Warning issued February 13 at 5:30PM PST until February 13 at 8:00PM PST by NWS Los Angeles/Oxnard CA


At 530 PM PST, local law enforcement reported dangerous debris flows in Altadena as a result of extremely heavy rainfall that is moving over the area. THIS IS A VERY DANGEROUS SITUATION!

HAZARD...Life threatening debris flows in and around the Eaton
Burn Scar.

SOURCE...Law enforcement reported.

IMPACT...Mud, rock, and debris flows are impacting drainages,
roads, and residences in and directly below the burn
area.

#EatonFire #DebrisFlow #CAwx #Altadena

2025-02-13

Info on #DebrisFlow cameras. Snipped from FB. #AtmosphericRiver #CAwx

"Update: all seven new cameras are now online
With a major atmospheric river projected to hit Southern California this week, ALERTCalifornia's field team has been working hard to install seven new cameras around Los Angeles to help emergency managers monitor potential debris flows from the Eaton and Palisades burn scars. The Bailey Canyon 1 & 2, Sierra Madre Canyon 1 & 2, and Sierra Madre Bridge cameras are already online for the the Eaton Fire scar. Cloudcroft 1 & 2 cameras will be online soon for the Palisades Fire scar. Search camera names at cameras.alertcalifornia.org to see their locations."

2025-02-13

AlertLACounty: Emergency message from LASD: 02/12/25 6:10pm: Deputies are in the field notifying residents of local mud/debris flow risk from PALISADES AND FRANKLIN FIRE burn scars. PARTS OF MALIBU, TOPANGA AND ALL OF SUNSET MESA are under EVACUATION WARNING until at least 2/14/25 2pm due to risk to of losing access. PREPARE NOW. More info at alertla.org. #wildfires #PalisadesFire #FranklinFire #flooding #debrisflow #warning

Emergency message from LASD: 02/12/25 6:10pm: Deputies are in the field notifying residents of local mud/debris flow risk from PALISADES AND FRANKLIN FIRE burn scars. PARTS OF MALIBU, TOPANGA AND ALL OF SUNSET MESA are under EVACUATION WARNING until at least 2/14/25 2pm due to risk to of losing access. PREPARE NOW. More info at alertla.org.
2025-02-12

@exador23 @ai6yr One thing that was learned from the 2018 Montecito #DebrisFlow was that at bends in the channel the material sometimes tends to pile up and then overshoot the bank on the downward side. The debris flow then continues *outside* the channel by finding a new path of least resistance which could very well be right down streets, through yards, etc.

2025-02-12

When this map opens it is centered on the #EatonFire area and shows the drainage ways with a black dot at the low end of each one. The map also shows the weather radar with yellow areas indicating heavier rain than green areas.

There is concern that heavy rains may cause #DebrisFlow

You can drag the map over to the area of the #PalisadesFire and see the same thing.
#AtmosphericRiver #CAwx

Open GISsurfer map:
mappingsupport.com/p2/gissurfe

2025-01-27

#DebrisFlow possible for #EatonFire and #PalisadesFire

Open interactive map with lots of links for more information. It will automatically zoom in on the Eaton fire. You can pan the map to the Palisades fire.
usgs.maps.arcgis.com/apps/dash

jj the Santa Barbariancookiesinheaven@m.ai6yr.org
2025-01-25

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