https://csdms.colorado.edu/csdms_wiki/api.php?action=feedcontributions&user=Rsincavage&feedformat=atomCSDMS - User contributions [en]2024-03-28T17:23:00ZUser contributionsMediaWiki 1.38.4https://csdms.colorado.edu/csdms_wiki/index.php?title=2022_CSDMS_meeting-080&diff=4173152022 CSDMS meeting-0802022-03-22T17:48:30Z<p>Rsincavage: Created page with "{{CSDMS meeting personal information template-2022 |CSDMS meeting first name=Ryan |CSDMS meeting last name=Sincavage |CSDMS meeting institute=Radford University |CSDMS meeting..."</p>
<hr />
<div>{{CSDMS meeting personal information template-2022<br />
|CSDMS meeting first name=Ryan<br />
|CSDMS meeting last name=Sincavage<br />
|CSDMS meeting institute=Radford University<br />
|CSDMS meeting city=Radford<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Virginia<br />
|CSDMS meeting email address=rsincavage@radford.edu<br />
|CSDMS meeting phone=3034349194<br />
}}<br />
{{CSDMS meeting select clinics1 2022<br />
|CSDMS_meeting_select_clinics1_2022=3) The Art of Modeling<br />
}}<br />
{{CSDMS meeting select clinics2 2022<br />
|CSDMS_meeting_select_clinics2_2022=3) Introduction to Landlab<br />
}}<br />
{{CSDMS meeting select clinics3 2022<br />
|CSDMS_meeting_select_clinics3_2022=2) Rapid hypothesis testing and analysis with the open-source delta model pyDeltaRCM<br />
}}<br />
{{CSDMS meeting abstract yes no 2022<br />
|CSDMS meeting abstract submit=Yes<br />
}}<br />
{{CSDMS meeting abstract title temp2022<br />
|CSDMS meeting abstract title=The influence of geologically instantaneous, event-scale processes on basin-scale sediment dispersal patterns<br />
|Working_group_member_WG_FRG=Terrestrial Working Group, Coastal Working Group, Marine Working Group, Hydrology Focus Research Group<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Man<br />
|CSDMS meeting coauthor last name abstract=Liang<br />
|CSDMS meeting coauthor institute / Organization=Indeed.com<br />
|CSDMS meeting coauthor town-city=Seattle<br />
|CSDMS meeting coauthor country=United States<br />
|State=Washington<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Jennifer<br />
|CSDMS meeting coauthor last name abstract=Pickering<br />
|CSDMS meeting coauthor institute / Organization=University of Kansas<br />
|CSDMS meeting coauthor town-city=Lawrence<br />
|CSDMS meeting coauthor country=United States<br />
|State=Kansas<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Steven<br />
|CSDMS meeting coauthor last name abstract=Goodbred<br />
|CSDMS meeting coauthor institute / Organization=Vanderbilt University<br />
|CSDMS meeting coauthor town-city=Nashville<br />
|CSDMS meeting coauthor country=United States<br />
|State=Tennessee<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Paola<br />
|CSDMS meeting coauthor last name abstract=Passalacqua<br />
|CSDMS meeting coauthor institute / Organization=University of Texas<br />
|CSDMS meeting coauthor town-city=Austin<br />
|CSDMS meeting coauthor country=United States<br />
|State=Texas<br />
}}<br />
{{CSDMS meeting abstract template 2022<br />
|CSDMS meeting abstract=The Jamuna Valley of the Bengal basin was in part developed by an early Holocene (~10.5 ka) Tibetan-sourced glacial lake outburst megaflood. This same event scoured a smaller, tangential channel east of the Jamuna valley into Sylhet Basin. This flood-carved channel on the western margin of the basin remained unoccupied until delta aggradation allowed the Brahmaputra River to re-occupy it ~7.5 ka. Strong topographic and tectonic influences suggest that the river was primed to occupy the topographically low basin interior. In spite of these conditions, the Brahmaputra remained largely restricted to this marginal paleo-flood course for the next ~2500 years. We use numerical modeling to investigate two possible scenarios driving the persistence of this channel course: (1) local backwater effects from a semi-permanent 10,000 km2 lake within the basin due to enhanced early Holocene Indian Summer Monsoon conditions, and (2) antecedent morphological control of the paleo-flood channel form. We simulate mid-Holocene conditions in Sylhet Basin by perturbing several physical parameters within a 1-D channel profile model and a 2-D depth-averaged hydrodynamic model to determine preferential flow path selection between two possible pathways. Neither a local backwater effect nor a reduction of the topographic slope to simulate pre-subsidence topography along two pathways appear to be plausible explanations for exclusion of flow to the central basin. Instead, the introduction of a scour along the western margin flow path is the only mechanism tested that induces a strong preference for bypass of the basin. Thus, both field and modeling evidence indicate that Himalayan-sourced megafloods modified the lowstand surface of the Bengal basin, creating antecedence that strongly influenced Holocene delta evolution and river channel behavior. These results suggest that geologically instantaneous, event-scale processes may exert long-term control on sediment dispersal patterns and thus preserved stratigraphy at the basin scale, even in large systems with pronounced tectonic and climatic influences.<br />
}}<br />
{{blank line template}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=2018_CSDMS_meeting-128&diff=2172722018 CSDMS meeting-1282018-04-02T01:36:09Z<p>Rsincavage: Created page with "{{CSDMS meeting personal information template-2018 |CSDMS meeting first name=Ryan |CSDMS meeting last name=Sincavage |CSDMS meeting institute=Radford University |CSDMS meeting..."</p>
<hr />
<div>{{CSDMS meeting personal information template-2018<br />
|CSDMS meeting first name=Ryan<br />
|CSDMS meeting last name=Sincavage<br />
|CSDMS meeting institute=Radford University<br />
|CSDMS meeting city=Radford<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Virginia<br />
|CSDMS meeting email address=rsincavage@radford.edu<br />
|CSDMS meeting phone=3034349194<br />
}}<br />
{{CSDMS meeting scholar and pre-meeting<br />
|CSDMS meeting pre-conference=None<br />
|CSDMS meeting post-conference=No<br />
}}<br />
{{CSDMS meeting select clinics1 2018<br />
|CSDMS_meeting_select_clinics1_2018=4) Sediment Experimentalist Network<br />
}}<br />
{{CSDMS meeting select clinics2 2018<br />
|CSDMS_meeting_select_clinics2_2018=1) Structure from Motion (SfM)<br />
}}<br />
{{CSDMS meeting select clinics3 2018<br />
|CSDMS_meeting_select_clinics3_2018=4) Artificial Intelligence & Machine Learning<br />
}}<br />
{{CSDMS scholarships yes no<br />
|CSDMS meeting scholarships=No<br />
}}<br />
{{CSDMS meeting abstract yes no 2018<br />
|CSDMS meeting abstract submit=Yes<br />
}}<br />
{{CSDMS meeting abstract title temp2018<br />
|CSDMS meeting abstract title=Deterioration of the eastern margin of the Colonia Glacier, northern Patagonia: the end of a glacially-dammed alpine lake?<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Frederick<br />
|CSDMS meeting coauthor last name abstract=Chambers<br />
|CSDMS meeting coauthor institute / Organization=University of Colorado Denver<br />
|CSDMS meeting coauthor town-city=Denver<br />
|CSDMS meeting coauthor country=United States<br />
|State=Colorado<br />
|CSDMS meeting coauthor email address=frederick.chambers@ucdenver.edu<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Elizabeth<br />
|CSDMS meeting coauthor last name abstract=Chamberlain<br />
|CSDMS meeting coauthor institute / Organization=Vanderbilt University<br />
|CSDMS meeting coauthor town-city=Nashville<br />
|CSDMS meeting coauthor country=United States<br />
|State=Tennessee<br />
|CSDMS meeting coauthor email address=elizabeth.chamberlain@vanderbilt.edu<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Manuel<br />
|CSDMS meeting coauthor last name abstract=Castro<br />
|CSDMS meeting coauthor institute / Organization=National Geospatial Intelligence Agency<br />
|CSDMS meeting coauthor town-city=Washington<br />
|CSDMS meeting coauthor country=United States<br />
|State=D.C.<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=James (Jim)<br />
|CSDMS meeting coauthor last name abstract=Young<br />
|CSDMS meeting coauthor institute / Organization=Radford University<br />
|CSDMS meeting coauthor town-city=Radford<br />
|CSDMS meeting coauthor country=United States<br />
|State=Virginia<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Jonathan<br />
|CSDMS meeting coauthor last name abstract=Burton<br />
|CSDMS meeting coauthor institute / Organization=University of Colorado Denver<br />
|CSDMS meeting coauthor town-city=Denver<br />
|CSDMS meeting coauthor country=United States<br />
|State=Colorado<br />
}}<br />
{{CSDMS meeting abstract template 2018<br />
|CSDMS meeting abstract=Lago Cachet Dos (LC2) is a glacially-dammed lake adjacent to the Northern Patagonian Ice Field (NPIF), formed by the blockage of Cachet Basin (CB) by the Colonia Glacier. This glacier has experienced rapid (~1-2 km) retreat of its terminus as well as ~1-2 m/yr of thinning, documented over the past several decades. Furthermore, the glacier has exhibited a change in hydrologic regime and the frequency of high energy glacial lake outburst flood (GLOF) events since 2008. These historical changes appear to be coupled with regional climate change; summer mean maximum and minimum temperatures in nearby Cochrane show a steady increase since 1971, whereas winter mean maximum temperatures show cooling in the 1970s and 1980s, followed by gradual warming with rapid acceleration in the 2000s-present. Preliminary correlations with a recently installed weather station at Sol de Mayo (~12 km downstream of the Colonia Glacier terminus) show a strong positive correlation with the Cochrane data, indicating these climate changes are regional and not local and thereby have implications for the evolution of other alpine basins of the NPIF and perhaps glaciers on a global scale. Recent observations from unmanned aerial vehicle (UAV) flights, satellite imagery, and geologic mapping suggest unprecedented glacier deterioration near the southern limit of CB. An UAV flight in January 2016 revealed that during GLOF events, the lake drained through a large hole at the base of the glacier. Upon entering this chasm, the water made a sharp east turn (towards the bedrock abutting the glacier’s eastern margin) and appeared to flow beneath the ice at this point. Subsequently, a large (~2km long x 100 m wide) supra-glacial channel has opened directly above the drainage hole, effectively separating the glacier from bedrock. Ice elevation data reveal that healing of this channel may not be possible under the current climate regime, suggesting the basin could be experiencing a long-term (over human timescales) shift to fluvial deposition from a dominantly lacustrine environment, corresponding to an inability to impound water associated with the glacier's retreat. Basin stratigraphy indicates these oscillations between lacustrine and fluvial conditions have occurred repeatedly throughout the Holocene, but the timing of these changes are poorly constrained. Optically stimulated luminescence (OSL) dating of CB sediments will be applied to identify the timing and periodicity of these depositional shifts, with the broader goal of linking these oscillations with local and regional climate and stability of the Colonia Glacier.<br />
}}<br />
{{blank line template}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=User:Rsincavage&diff=217259User:Rsincavage2018-04-01T13:54:51Z<p>Rsincavage: </p>
<hr />
<div>{{Signup information member<br />
|First name member=Ryan<br />
|Last name member=Sincavage<br />
|Institute member=Radford University<br />
|Department member=Geology Department<br />
|City member=Radford<br />
|Country member=United States<br />
|State member=Virginia<br />
|Confirm email member=rsincavage@radford.edu<br />
|Working group member=Terrestrial Working Group, Coastal Working Group, Marine Working Group, Education and Knowledge Transfer (EKT) Working Group<br />
|Emaillist group member=yes<br />
}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=Annualmeeting:2017_CSDMS_meeting-108&diff=122367Annualmeeting:2017 CSDMS meeting-1082017-04-18T13:23:31Z<p>Rsincavage: </p>
<hr />
<div>{{CSDMS meeting personal information template-2014<br />
|CSDMS meeting first name=Ryan<br />
|CSDMS meeting last name=Sincavage<br />
|CSDMS meeting institute=Vanderbilt University<br />
|CSDMS meeting city=Nashville<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Tennessee<br />
|CSDMS meeting email address=ryan.s.sincavage@vanderbilt.edu<br />
|CSDMS meeting phone=3034349194<br />
}}<br />
{{CSDMS meeting scholar and pre-meeting<br />
|CSDMS meeting pre-conference=Bootcamp<br />
|CSDMS meeting post-conference=No<br />
}}<br />
{{CSDMS meeting select clinics1<br />
|CSDMS_meeting_select_clinics1=2) ANUGA - river flood morphodynamics<br />
}}<br />
{{CSDMS meeting select clinics2<br />
|CSDMS_meeting_select_clinics2=4) The Sediment Experimentalist Network (SEN)<br />
}}<br />
{{CSDMS meeting select clinics3<br />
|CSDMS_meeting_select_clinics3=4) LandLab and Dakota<br />
}}<br />
{{CSDMS scholarships yes no<br />
|CSDMS meeting scholarships=No<br />
}}<br />
{{CSDMS meeting abstract yes no<br />
|CSDMS meeting abstract submit=Yes<br />
}}<br />
{{CSDMS meeting abstract title temp<br />
|CSDMS meeting abstract title=Evaluating order vs. disorder in fluvial system deposits: A statistical analysis of grain size and thickness trends within vertical successions of sediment packages in the Ganges-Brahmaputra-Meghna delta, Bangladesh<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Steven<br />
|CSDMS meeting coauthor last name abstract=Goodbred<br />
|CSDMS meeting coauthor institute / Organization=Vanderbilt University<br />
|CSDMS meeting coauthor town-city=Nashville<br />
|CSDMS meeting coauthor country=United States<br />
|State=Tennessee<br />
|CSDMS meeting coauthor email address=steven.goodbred@vanderbilt.edu<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Peter<br />
|CSDMS meeting coauthor last name abstract=Burgess<br />
|CSDMS meeting coauthor institute / Organization=University of Liverpool<br />
|CSDMS meeting coauthor town-city=Liverpool<br />
|CSDMS meeting coauthor country=United Kingdom<br />
|CSDMS meeting coauthor email address=Peter.Burgess@liverpool.ac.uk<br />
}}<br />
{{CSDMS meeting abstract template<br />
|CSDMS meeting abstract=The propagation of environmental signals through the sediment routing system and their subsequent preservation or removal from the rock record is a central theme in current stratigraphic research. The identification of cyclicity and order in stratigraphic sequences with regard to vertical facies successions, thicknesses, and grain size trends is often used as indicator of preservation of non-random, extra-basinal signals (i.e. climate, tectonics, and base level). However, it is less clear to what extent the processes that alter these signals post-deposition (re-working, scour, and erosion) enhance or diminish cyclicity and order within preserved sediments. Furthermore, stratigraphic trends are often identified in subjective, qualitative terms and may be based more on a priori perception of order derived from depositional systems models than statistically robust trends inherent in the sediment archive. Here, we use a statistical metric to objectively evaluate order vs. disorder in the stratigraphic record in an attempt to identify the likelihood of a disordered (random) response to orderly (non-random) depositional processes. We utilize a quantitative geochemical and sedimentological dataset from the Ganges-Brahmaputra-Meghna delta (GMBD) to identify distinct fluvial sediment packages (defined as meter to 10s of meters thick sand packages similar in scale and character to modern bar forms) and statistical trends in their vertical successions across the delta. We begin by considering that the boundaries of these fining-upwards packages are defined by >50% increases in grain size from one sample to the next in a vertical succession (although other thresholds are evaluated as well). A runs metric “r” is then calculated by identifying streaks of increasing or decreasing sediment package thicknesses and volume weighted mean grain size. This metric is then compared to the output of a Monte Carlo simulation of 5000 synthetic boreholes created by random shuffles of the observed borehole data to determine the likelihood of a similar succession of sediment body thicknesses and grain size trends being generated by chance. Preliminary results indicate that the vast majority of observed thickness successions in the GBMD are statistically “disordered”, with regional variability correlated to discrete geomorphic provinces within the delta. Of note, sediment thickness trends from the main braidbelt exhibit the lowest probability of being generated by random chance, followed by the lower delta plain, and lastly by Sylhet basin, a semi-enclosed sub-basin in northeast Bangladesh that has experienced episodic occupation by the mainstem Brahmaputra River throughout the Holocene. Similar results (with some notable exceptions) are found within grain size runs analyses, with Sylhet basin exhibiting the least amount of order with regard to vertical changes in grain size. Previous studies have identified Sylhet basin as a site of rapid mass extraction, suggesting a possible inverse relationship between stratigraphic order and rates of sediment extraction in fluvial systems. These results lay the groundwork for future studies in the utility of simple statistical measures in identifying random vs. ordered successions of sediment packages as indicators of process-response relationships preserved in the stratigraphic record.<br />
}}<br />
{{blank line template}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=Annualmeeting:2017_CSDMS_meeting-108&diff=122366Annualmeeting:2017 CSDMS meeting-1082017-04-18T13:22:32Z<p>Rsincavage: </p>
<hr />
<div>{{CSDMS meeting personal information template-2014<br />
|CSDMS meeting first name=Ryan<br />
|CSDMS meeting last name=Sincavage<br />
|CSDMS meeting institute=Vanderbilt University<br />
|CSDMS meeting city=Nashville<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Tennessee<br />
|CSDMS meeting email address=ryan.s.sincavage@vanderbilt.edu<br />
|CSDMS meeting phone=3034349194<br />
}}<br />
{{CSDMS meeting scholar and pre-meeting<br />
|CSDMS meeting pre-conference=Bootcamp<br />
|CSDMS meeting post-conference=No<br />
}}<br />
{{CSDMS meeting select clinics1<br />
|CSDMS_meeting_select_clinics1=2) ANUGA - river flood morphodynamics<br />
}}<br />
{{CSDMS meeting select clinics2<br />
|CSDMS_meeting_select_clinics2=4) The Sediment Experimentalist Network (SEN)<br />
}}<br />
{{CSDMS meeting select clinics3<br />
|CSDMS_meeting_select_clinics3=4) LandLab and Dakota<br />
}}<br />
{{CSDMS scholarships yes no<br />
|CSDMS meeting scholarships=No<br />
}}<br />
{{CSDMS meeting abstract yes no<br />
|CSDMS meeting abstract submit=Yes<br />
}}<br />
{{CSDMS meeting abstract title temp<br />
|CSDMS meeting abstract title=Evaluating order vs. disorder in fluvial system deposits: A statistical analysis of grain size and thickness trends within vertical successions of sediment packages in the Ganges-Brahmaputra-Meghna delta, Bangladesh<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Steven<br />
|CSDMS meeting coauthor last name abstract=Goodbred<br />
|CSDMS meeting coauthor institute / Organization=Vanderbilt University<br />
|CSDMS meeting coauthor town-city=Nashville<br />
|CSDMS meeting coauthor country=United States<br />
|State=Tennessee<br />
|CSDMS meeting coauthor email address=steven.goodbred@vanderbilt.edu<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Peter<br />
|CSDMS meeting coauthor last name abstract=Burgess<br />
|CSDMS meeting coauthor institute / Organization=University of Liverpool<br />
|CSDMS meeting coauthor town-city=Liverpool<br />
|CSDMS meeting coauthor country=United Kingdom<br />
}}<br />
{{CSDMS meeting abstract template<br />
|CSDMS meeting abstract=The propagation of environmental signals through the sediment routing system and their subsequent preservation or removal from the rock record is a central theme in current stratigraphic research. The identification of cyclicity and order in stratigraphic sequences with regard to vertical facies successions, thicknesses, and grain size trends is often used as indicator of preservation of non-random, extra-basinal signals (i.e. climate, tectonics, and base level). However, it is less clear to what extent the processes that alter these signals post-deposition (re-working, scour, and erosion) enhance or diminish cyclicity and order within preserved sediments. Furthermore, stratigraphic trends are often identified in subjective, qualitative terms and may be based more on a priori perception of order derived from depositional systems models than statistically robust trends inherent in the sediment archive. Here, we use a statistical metric to objectively evaluate order vs. disorder in the stratigraphic record in an attempt to identify the likelihood of a disordered (random) response to orderly (non-random) depositional processes. We utilize a quantitative geochemical and sedimentological dataset from the Ganges-Brahmaputra-Meghna delta (GMBD) to identify distinct fluvial sediment packages (defined as meter to 10s of meters thick sand packages similar in scale and character to modern bar forms) and statistical trends in their vertical successions across the delta. We begin by considering that the boundaries of these fining-upwards packages are defined by >50% increases in grain size from one sample to the next in a vertical succession (although other thresholds are evaluated as well). A runs metric “r” is then calculated by identifying streaks of increasing or decreasing sediment package thicknesses and volume weighted mean grain size. This metric is then compared to the output of a Monte Carlo simulation of 5000 synthetic boreholes created by random shuffles of the observed borehole data to determine the likelihood of a similar succession of sediment body thicknesses and grain size trends being generated by chance. Preliminary results indicate that the vast majority of observed thickness successions in the GBMD are statistically “disordered”, with regional variability correlated to discrete geomorphic provinces within the delta. Of note, sediment thickness trends from the main braidbelt exhibit the lowest probability of being generated by random chance, followed by the lower delta plain, and lastly by Sylhet basin, a semi-enclosed sub-basin in northeast Bangladesh that has experienced episodic occupation by the mainstem Brahmaputra River throughout the Holocene. Similar results (with some notable exceptions) are found within grain size runs analyses, with Sylhet basin exhibiting the least amount of order with regard to vertical changes in grain size. Previous studies have identified Sylhet basin as a site of rapid mass extraction, suggesting a possible inverse relationship between stratigraphic order and rates of sediment extraction in fluvial systems. These results lay the groundwork for future studies in the utility of simple statistical measures in identifying random vs. ordered successions of sediment packages as indicators of process-response relationships preserved in the stratigraphic record.<br />
}}<br />
{{blank line template}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=Annualmeeting:2017_CSDMS_meeting-108&diff=121995Annualmeeting:2017 CSDMS meeting-1082017-03-27T21:14:23Z<p>Rsincavage: Created page with "{{CSDMS meeting personal information template-2014 |CSDMS meeting first name=Ryan |CSDMS meeting last name=Sincavage |CSDMS meeting institute=Vanderbilt University |CSDMS meet..."</p>
<hr />
<div>{{CSDMS meeting personal information template-2014<br />
|CSDMS meeting first name=Ryan<br />
|CSDMS meeting last name=Sincavage<br />
|CSDMS meeting institute=Vanderbilt University<br />
|CSDMS meeting city=Nashville<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Tennessee<br />
|CSDMS meeting email address=ryan.s.sincavage@vanderbilt.edu<br />
|CSDMS meeting phone=3034349194<br />
}}<br />
{{CSDMS meeting scholar and pre-meeting<br />
|CSDMS meeting pre-conference=Bootcamp<br />
|CSDMS meeting post-conference=No<br />
}}<br />
{{CSDMS meeting select clinics1<br />
|CSDMS_meeting_select_clinics1=2) ANUGA - river flood morphodynamics<br />
}}<br />
{{CSDMS meeting select clinics2<br />
|CSDMS_meeting_select_clinics2=4) The Sediment Experimentalist Network (SEN)<br />
}}<br />
{{CSDMS meeting select clinics3<br />
|CSDMS_meeting_select_clinics3=4) LandLab and Dakota<br />
}}<br />
{{CSDMS scholarships yes no<br />
|CSDMS meeting scholarships=No<br />
}}<br />
{{CSDMS meeting abstract yes no<br />
|CSDMS meeting abstract submit=Yes<br />
}}<br />
{{CSDMS meeting abstract title temp<br />
|CSDMS meeting abstract title=Evaluating order vs. disorder in fluvial system deposits: A statistical analysis of grain size and thickness trends within vertical successions of sediment packages in the Ganges-Brahmaputra-Meghna delta, Bangladesh<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Steven<br />
|CSDMS meeting coauthor last name abstract=Goodbred<br />
|CSDMS meeting coauthor institute / Organization=Vanderbilt University<br />
|CSDMS meeting coauthor town-city=Nashville<br />
|CSDMS meeting coauthor country=United States<br />
|State=Tennessee<br />
|CSDMS meeting coauthor email address=steven.goodbred@vanderbilt.edu<br />
}}<br />
{{CSDMS meeting abstract template<br />
|CSDMS meeting abstract=The propagation of environmental signals through the sediment routing system and their subsequent preservation or removal from the rock record is a central theme in current stratigraphic research. The identification of cyclicity and order in stratigraphic sequences with regard to vertical facies successions, thicknesses, and grain size trends is often used as indicator of preservation of non-random, extra-basinal signals (i.e. climate, tectonics, and base level). However, it is less clear to what extent the processes that alter these signals post-deposition (re-working, scour, and erosion) enhance or diminish cyclicity and order within preserved sediments. Furthermore, stratigraphic trends are often identified in subjective, qualitative terms and may be based more on a priori perception of order derived from depositional systems models than statistically robust trends inherent in the sediment archive. Here, we use a statistical metric to objectively evaluate order vs. disorder in the stratigraphic record in an attempt to identify the likelihood of a disordered (random) response to orderly (non-random) depositional processes. We utilize a quantitative geochemical and sedimentological dataset from the Ganges-Brahmaputra-Meghna delta (GMBD) to identify distinct fluvial sediment packages (defined as meter to 10s of meters thick sand packages similar in scale and character to modern bar forms) and statistical trends in their vertical successions across the delta. We begin by considering that the boundaries of these fining-upwards packages are defined by >50% increases in grain size from one sample to the next in a vertical succession (although other thresholds are evaluated as well). A runs metric “r” is then calculated by identifying streaks of increasing or decreasing sediment package thicknesses and volume weighted mean grain size. This metric is then compared to the output of a Monte Carlo simulation of 5000 synthetic boreholes created by random shuffles of the observed borehole data to determine the likelihood of a similar succession of sediment body thicknesses and grain size trends being generated by chance. Preliminary results indicate that the vast majority of observed thickness successions in the GBMD are statistically “disordered”, with regional variability correlated to discrete geomorphic provinces within the delta. Of note, sediment thickness trends from the main braidbelt exhibit the lowest probability of being generated by random chance, followed by the lower delta plain, and lastly by Sylhet basin, a semi-enclosed sub-basin in northeast Bangladesh that has experienced episodic occupation by the mainstem Brahmaputra River throughout the Holocene. Similar results (with some notable exceptions) are found within grain size runs analyses, with Sylhet basin exhibiting the least amount of order with regard to vertical changes in grain size. Previous studies have identified Sylhet basin as a site of rapid mass extraction, suggesting a possible inverse relationship between stratigraphic order and rates of sediment extraction in fluvial systems. These results lay the groundwork for future studies in the utility of simple statistical measures in identifying random vs. ordered successions of sediment packages as indicators of process-response relationships preserved in the stratigraphic record.<br />
}}<br />
{{blank line template}}</div>Rsincavagehttps://csdms.colorado.edu/csdms_wiki/index.php?title=User:Rsincavage&diff=64710User:Rsincavage2013-07-30T21:32:08Z<p>Rsincavage: </p>
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<div>{{Signup information member<br />
|First name member=Ryan<br />
|Last name member=Sincavage<br />
|Institute member=Vanderbilt University<br />
|City member=Nashville<br />
|Country member=United States<br />
|Confirm email member=ryan.s.sincavage@vanderbilt.edu<br />
|Working group member=Terrestrial Working Group, Coastal Working Group, Marine Working Group, Education and Knowledge Transfer (EKT) Working Group<br />
}}</div>Rsincavage