Annualmeeting:2017 CSDMS meeting-125

2017-03-31T21:58:36Z

Maxdv: Created page with "{{CSDMS meeting personal information template-2014 |CSDMS meeting first name=Max |CSDMS meeting last name=Daniller-Varghese |CSDMS meeting institute=University of Texas at Aus..."

{{CSDMS meeting personal information template-2014
|CSDMS meeting first name=Max
|CSDMS meeting last name=Daniller-Varghese
|CSDMS meeting institute=University of Texas at Austin
|CSDMS meeting city=Austin
|CSDMS meeting country=United States
|CSDMS meeting state=Texas
|CSDMS meeting email address=maxdv@utexas.edu
|CSDMS meeting phone=512-422-0240
}}
{{CSDMS meeting scholar and pre-meeting
|CSDMS meeting pre-conference=None
|CSDMS meeting post-conference=No
}}
{{CSDMS meeting select clinics1
|CSDMS_meeting_select_clinics1=4) Spatial agent-based models
}}
{{CSDMS meeting select clinics2
|CSDMS_meeting_select_clinics2=4) The Sediment Experimentalist Network (SEN)
}}
{{CSDMS meeting select clinics3
|CSDMS_meeting_select_clinics3=2) Introduction to EcoPath with Ecosim
}}
{{CSDMS scholarships yes no
|CSDMS meeting scholarships=No
}}
{{CSDMS meeting abstract yes no
|CSDMS meeting abstract submit=Yes
}}
{{CSDMS meeting abstract title temp
|CSDMS meeting abstract title=Intermittency, Sediment Advection Length Distribution, and Delta Island Development.
}}
{{CSDMS meeting authors template
|CSDMS meeting coauthor first name abstract=Wonsuck
|CSDMS meeting coauthor last name abstract=Kim
|CSDMS meeting coauthor institute / Organization=University of Texas at Austin
|CSDMS meeting coauthor town-city=Austin
|CSDMS meeting coauthor country=United States
|State=Texas
|CSDMS meeting coauthor email address=delta@jsg.utexas.edu
}}
{{CSDMS meeting authors template
|CSDMS meeting coauthor first name abstract=David
|CSDMS meeting coauthor last name abstract=Mohrig
|CSDMS meeting coauthor institute / Organization=University of Texas at Austin
|CSDMS meeting coauthor town-city=Austin
|CSDMS meeting coauthor country=United States
|State=Texas
|CSDMS meeting coauthor email address=mohrig@jsg.utexas.edu
}}
{{CSDMS meeting abstract template
|CSDMS meeting abstract=To better understand large-scale delta-network responses to fluctuating discharge, we focused on the evolution of a single channel-island node within a delta network. Using the Surface Transport and Earth-surface Processes (STEP) basin, we were able to construct and observe the evolution of mouth-bar systems and subsequent flow bifurcation around an individual island in transport-limited, turbulent conditions. Overhead time-lapse images, laser-altimetry scans, and a low-cost particle tracking velocimetry system allow us to characterize the flow and depositional evolution of our experimental islands. Two alternating discharges that model flood and interflood transport (6 l/s, 0.355 l/s) with uniform sediment (170 microns) were used to create two characteristic sediment advective lengths. Floods transport sediment in full suspension (P_flood at inlet = 0.16), while interfloods transport sediment as bedload (P_interflood at inlet = 2.7). The consequent deposits are distal steep deposits from floods raining sediment out of suspension, and proximal low-angle, leveed deposits from interfloods laterally advecting sediment and floods remobilizing sediment down-system. By varying the frequency of floods (one every 20s-20 mins) while keeping sediment and water mass constant across experiments, we are able to control the time and spatial organization of these two deposit types and examine the effect on bifurcation length and bifurcation incidence time. While the deposits are initially spatially segregated, as the interflood deposit and flood deposit accumulate sediment over time, the interflood deposit encroaches onto the flood deposit. Flow routes from the interflood deposit to the flood deposit and bifurcates because of a preferential slope gradient around the distal deposit. Rather than a single hydrodynamic condition dictating the location of bifurcation, the length to a bifurcation can be described by the intersection of multiple distributions of topographies from the variable flow of solids.
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CSDMS - User contributions [en]

Annualmeeting:2017 CSDMS meeting-125