CSDMS - User contributions [en]

2024 CSDMS meeting-114

2024-04-03T15:50:27Z

Dgeorge:

{{CSDMS meeting personal information template-2024
|CSDMS meeting first name=David
|CSDMS meeting last name=George
|CSDMS Pronouns=he/him
|CSDMS meeting institute=U.S. Geological Survey
|CSDMS meeting city=Vancouver, WA
|CSDMS meeting country=United States
|CSDMS meeting state=WA
|CSDMS meeting email address=dgeorge@usgs.gov
|CSDMS meeting phone=2063562623
}}
{{CSDMS meeting select clinics1 2024
|CSDMS_meeting_select_clinics1_2024=1) Solving the sea level equation
}}
{{CSDMS meeting select clinics2 2024
|CSDMS_meeting_select_clinics2_2024=5) Will not attend a clinic this day
}}
{{CSDMS meeting select clinics3 2024
|CSDMS_meeting_select_clinics3_2024=3) New features and basic usage of the GeoClaw software for depth-averaged flow
}}
{{CSDMS meeting abstract yes no 2024
|CSDMS meeting abstract submit 2024=Yes
}}
{{CSDMS meeting abstract poster Epub 2024
|CSDMS meeting poster Epub submit 2024=Poster
}}
{{CSDMS meeting abstract title temp2024
|CSDMS meeting abstract title=Modeling the effects of bed-sediment entrainment on the dynamics and runout of outburst floods and emergent debris flows with the granular-fluid model D-Claw.
|Working_group_member_WG_FRG=Hydrology Focus Research Group
}}
{{CSDMS meeting abstract template 2024
|CSDMS meeting abstract=Outburst floods and debris flows often incorporate large volumes of erodible bed sediment along their runout path. Although this phenomenon is widely recognized and often implicated for volumetric growth of debris flows, the effect of this process on the dynamics and runout extent of large flows has not been directly modeled extensively or systematically. Rather, models that account for this process traditionally utilize simple static volumetric and/or rheological adjustments. However, this process dynamically influences flood and debris-flow evolution in a complex spatiotemporal fashion.

We used D-Claw, a depth-averaged granular-fluid model that accommodates the incorporation of bed material into overlying flow and resultant changes in flow rheology across a wide range of solid concentrations, from dilute suspensions to dense-granular debris flows. We modeled hypothetical lake outburst floods from Spirit Lake, WA into the erodible sediment rich Toutle River Valley. Downstream flood dynamics of clear-water flows were compared to floods that entrain material and transform into down-valley debris flows. We found that while the entrainment of bed material may significantly increase total flow volume (>150%), downstream discharge and runout extent are more similar to clear-water floods than might be expected by volumetric considerations alone. We postulate that the relationship between entrained volume and flow extent depends on complicated site-specific factors such as location of erodible sediment and evolving rheological factors.
}}
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2024 CSDMS meeting-114

2024-04-03T15:41:37Z

Dgeorge: Created page with "{{CSDMS meeting personal information template-2024 |CSDMS meeting first name=David |CSDMS meeting last name=George |CSDMS Pronouns=he/him |CSDMS meeting institute=U.S. Geological Survey |CSDMS meeting city=Vancouver, WA |CSDMS meeting country=United States |CSDMS meeting state=WA |CSDMS meeting email address=dgeorge@usgs.gov |CSDMS meeting phone=2063562623 }} {{CSDMS meeting select clinics1 2024 |CSDMS_meeting_select_clinics1_2024=1) Solving the sea level equation }} {{C..."

User:Dgeorge

2024-03-30T15:34:15Z

Dgeorge: Created page with "{{Signup information member |First name member=David |Last name member=George |Pronouns=he/him/his |Institute member=US Geological Survey |Department member=Cascades Volcano Observatory |Postal address 1 member=1300 SE Cardinal Ct. |Postal address 2 member=Ste. 100 |City member=Vancouver, WA |Postal code member=98683 |Country member=United States |State member=Washington |Confirm email member=dgeorge@usgs.gov |Work phone member=360-993-8932 |Cell phone member=206-356-262..."

{{Signup information member
|First name member=David
|Last name member=George
|Pronouns=he/him/his
|Institute member=US Geological Survey
|Department member=Cascades Volcano Observatory
|Postal address 1 member=1300 SE Cardinal Ct.
|Postal address 2 member=Ste. 100
|City member=Vancouver, WA
|Postal code member=98683
|Country member=United States
|State member=Washington
|Confirm email member=dgeorge@usgs.gov
|Work phone member=360-993-8932
|Cell phone member=206-356-2623
|Website member=https://dlgeorge.github.io
|Working group member=Marine Working Group, Cyberinformatics and Numerics Working Group
|Emaillist group member=yes
|Description of your CSDMS-related interests member=mathematical models and software for granular-fluid flows
|Memberagreement=I have read and agree to the Privacy Policy
}}