https://csdms.colorado.edu/csdms_wiki/api.php?action=feedcontributions&user=Langstoa&feedformat=atomCSDMS - User contributions [en]2024-03-28T10:59:00ZUser contributionsMediaWiki 1.38.4https://csdms.colorado.edu/csdms_wiki/index.php?title=2023_CSDMS_meeting-007&diff=4350592023 CSDMS meeting-0072023-01-26T20:46:00Z<p>Langstoa: Created page with "{{CSDMS meeting personal information template-2023 |CSDMS meeting first name=Abigail |CSDMS meeting last name=Langston |CSDMS meeting institute=Kansas State University |CSDMS meeting city=Manhattan |CSDMS meeting country=United States |CSDMS meeting state=Kansas |CSDMS meeting email address=alangston@ksu.edu }} {{CSDMS meeting select clinics1 2023 |CSDMS_meeting_select_clinics1_2023=4) LSDtopotools }} {{CSDMS meeting select clinics2 2023 |CSDMS_meeting_select_clinics2_20..."</p>
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<div>{{CSDMS meeting personal information template-2023<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS meeting institute=Kansas State University<br />
|CSDMS meeting city=Manhattan<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Kansas<br />
|CSDMS meeting email address=alangston@ksu.edu<br />
}}<br />
{{CSDMS meeting select clinics1 2023<br />
|CSDMS_meeting_select_clinics1_2023=4) LSDtopotools<br />
}}<br />
{{CSDMS meeting select clinics2 2023<br />
|CSDMS_meeting_select_clinics2_2023=2) Coupling models of lithospheric deformation and surface processes (ASPECT)<br />
}}<br />
{{CSDMS meeting select clinics3 2023<br />
|CSDMS_meeting_select_clinics3_2023=2) Integrating Agent-Based Models into Landlab via pyNetLogo<br />
}}<br />
{{CSDMS meeting abstract yes no 2023<br />
|CSDMS meeting abstract submit 2023=Yes<br />
}}<br />
{{CSDMS meeting abstract poster Epub 2023<br />
|CSDMS meeting poster Epub submit 2023=Poster<br />
}}<br />
{{CSDMS meeting abstract title temp2023<br />
|CSDMS meeting abstract title=Modeling the development of wide bedrock valleys as a function of collapsed bedrock block size, bed sediment, and discharge variability<br />
|Working_group_member_WG_FRG=Terrestrial Working Group, Hydrology Focus Research Group<br />
}}<br />
{{CSDMS meeting abstract template 2023<br />
|CSDMS meeting abstract=Theories for vertical bedrock river incision are well developed and widely applied; however, understanding how bedrock rivers laterally erode their banks and develop into wide bedrock valleys is a frontier topic in geomorphology. I use a modified version of the Landlab lateral erosion component coupled with the sediment-flux dependent vertical incision component in Landlab to explore the fundamental question of how valley width and widening rates are related to sediment on the channel bed. The lateral erosion component widens valleys through lateral undercutting and eventual collapse of bedrock valley walls. The modified lateral erosion component allows the user to set a characteristic block size of collapsed bedrock material. Collapsed material with smaller blocks sizes is rapidly transported away from the valley wall, allowing continued widening, while collapsed material with larger block sizes protects valley walls from further widening until it has weathered into transportable grain sizes. Model simulations show that valleys are wider in landscapes where collapsed material is closer in size to bedload sediment and narrower in landscapes where collapsed material is much larger than bedload sediment. I also use the newly modified lateral erosion/valley widening component together with additional Landlab components to explore the effects of variable discharge and changes in sediment flux on valley width and valley widening rates. This set of model experiments is a step towards a more nuanced and quantifiable framework for describing and predicting bedrock valley widening through time. Numerical models that include physical processes of valley widening are necessary for further advances of geomorphic applications such as numerical modeling of climate-driven strath terrace formation and hillslope–channel coupling.<br />
}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=2022_CSDMS_meeting-025&diff=4176152022 CSDMS meeting-0252022-04-15T21:03:12Z<p>Langstoa: </p>
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<div>{{CSDMS meeting personal information template-2022<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS Pronouns=she/her<br />
|CSDMS meeting institute=Kansas State University<br />
|CSDMS meeting city=Manhattan<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Kansas<br />
|CSDMS meeting email address=alangston@ksu.edu<br />
}}<br />
{{CSDMS meeting select clinics1 2022<br />
|CSDMS_meeting_select_clinics1_2022=4) Teaching with Jupyter NoteBooks<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=1) Component Creation with Landlab<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=Modeling the development of wide bedrock valleys as a function of collapsed bedrock block size, bed sediment, and discharge variability<br />
|Working_group_member_WG_FRG=Terrestrial Working Group<br />
}}<br />
{{CSDMS meeting abstract template 2022<br />
|CSDMS meeting abstract=Theories for vertical bedrock river incision are well developed and widely applied; however, understanding how bedrock rivers laterally erode their banks and develop into wide bedrock valleys is a frontier topic in geomorphology. I use a modified version of the Landlab lateral erosion component coupled with the sediment-flux dependent vertical incision component in Landlab to explore the fundamental question of how valley width and widening rates are related to sediment on the channel bed. The lateral erosion component widens valleys through lateral undercutting and eventual collapse of bedrock valley walls. The modified lateral erosion component allows the user to set a characteristic block size of collapsed bedrock material. Collapsed material with smaller blocks sizes is rapidly transported away from the valley wall, allowing continued widening, while collapsed material with larger block sizes protects valley walls from further widening until it has weathered into transportable grain sizes. Model simulations show that valleys are wider in landscapes where collapsed material is closer in size to bedload sediment and narrower in landscapes where collapsed material is much larger than bedload sediment. I also use the newly modified lateral erosion/valley widening component together with additional Landlab components to explore the effects of variable discharge and changes in sediment flux on valley width and valley widening rates. This set of model experiments is a step towards a more nuanced and quantifiable framework for describing and predicting bedrock valley widening through time. Numerical models that include physical processes of valley widening are necessary for further advances of geomorphic applications such as numerical modeling of climate-driven strath terrace formation and hillslope–channel coupling.<br />
}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=2022_CSDMS_meeting-025&diff=4018722022 CSDMS meeting-0252022-01-31T15:02:19Z<p>Langstoa: Created page with "{{CSDMS meeting personal information template-2022 |CSDMS meeting first name=Abigail |CSDMS meeting last name=Langston |CSDMS Pronouns=she/her |CSDMS meeting institute=Kansas..."</p>
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<div>{{CSDMS meeting personal information template-2022<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS Pronouns=she/her<br />
|CSDMS meeting institute=Kansas State University<br />
|CSDMS meeting city=Manhattan<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Kansas<br />
|CSDMS meeting email address=alangston@ksu.edu<br />
}}<br />
{{CSDMS meeting select clinics1 2022<br />
|CSDMS_meeting_select_clinics1_2022=4) Teaching with Jupyter NoteBooks<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=1) Component Creation with Landlab<br />
}}<br />
{{CSDMS meeting abstract yes no 2022<br />
|CSDMS meeting abstract submit=No<br />
}}<br />
{{CSDMS meeting abstract title temp2022}}<br />
{{CSDMS meeting abstract template 2022}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=2019_CSDMS_meeting-111&diff=2243392019 CSDMS meeting-1112019-04-02T01:03:51Z<p>Langstoa: Created page with "{{CSDMS meeting personal information template-2019 |CSDMS meeting first name=Abigail |CSDMS meeting last name=Langston |CSDMS meeting institute=Kansas State University |CSDMS..."</p>
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<div>{{CSDMS meeting personal information template-2019<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS meeting institute=Kansas State University<br />
|CSDMS meeting city=Manhattan<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Kansas<br />
|CSDMS meeting email address=alangston@ksu.edu<br />
|CSDMS meeting phone=7855326727<br />
}}<br />
{{CSDMS meeting scholar and pre-meeting2019<br />
|CSDMS meeting pre-conference2019=Software Carpentry Workshop<br />
}}<br />
{{CSDMS meeting select clinics1 2019<br />
|CSDMS_meeting_select_clinics1_2019=3) Pangeo - Scalable Geoscience Tools Python<br />
}}<br />
{{CSDMS meeting select clinics2 2019<br />
|CSDMS_meeting_select_clinics2_2019=2) Hydroshare - Data<br />
}}<br />
{{CSDMS meeting select clinics3 2019<br />
|CSDMS_meeting_select_clinics3_2019=5) Will not attend a clinic<br />
}}<br />
{{CSDMS scholarships yes no<br />
|CSDMS meeting scholarships=No<br />
}}<br />
{{CSDMS meeting abstract yes no 2019<br />
|CSDMS meeting abstract submit=No<br />
}}<br />
{{CSDMS meeting abstract title temp2019}}<br />
{{CSDMS meeting abstract template 2019}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=Annualmeeting:2017_CSDMS_meeting-128&diff=122137Annualmeeting:2017 CSDMS meeting-1282017-04-01T21:20:16Z<p>Langstoa: Created page with "{{CSDMS meeting personal information template-2014 |CSDMS meeting first name=Abigail |CSDMS meeting last name=Langston |CSDMS meeting institute=Kansas State University |CSDMS..."</p>
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<div>{{CSDMS meeting personal information template-2014<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS meeting institute=Kansas State University<br />
|CSDMS meeting city=Manhattan<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Kansas<br />
|CSDMS meeting email address=alangston@ksu.edu<br />
|CSDMS meeting phone=7853237788<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<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=Using a landscape evolution model to evaluate the role of pulses of uplift on bedrock valley width and channel mobility<br />
}}<br />
{{CSDMS meeting authors template<br />
|CSDMS meeting coauthor first name abstract=Gregory<br />
|CSDMS meeting coauthor last name abstract=Tucker<br />
|CSDMS meeting coauthor institute / Organization=University of Colorado<br />
|CSDMS meeting coauthor town-city=Boulder<br />
|CSDMS meeting coauthor country=United States<br />
|State=Colorado<br />
|CSDMS meeting coauthor email address=gtucker@colorado.edu<br />
}}<br />
{{CSDMS meeting abstract template<br />
|CSDMS meeting abstract=Understanding the factors that control lateral erosion rates in bedrock channels is a frontier in geomorphology. When lateral bedrock erosion rates exceed the rate of vertical incision on the channel bed, wide bedrock valleys are produced; if vertical incision rates then exceed lateral erosion rates, a strath terrace can be produced. Lateral erosion rates and the evolution of wide bedrock valleys are linked to bedrock lithology, sediment supply in the stream, discharge variability, and uplift. <br />
We use a newly-developed lateral erosion component in the Landlab modeling framework to explore how the width of bedrock valleys develops under competition between lateral channel mobility and uplift rate. Two model formulations are presented, one representing the slow process of widening in a bedrock canyon, the other representing undercutting, slumping, and rapid downstream sediment transport that occurs in softer bedrock. We ran modeling experiments with a range of bedrock erodibility, sediment mobility, and uplift conditions. In order to determine the role changing uplift patterns has on channel mobility and bedrock valley width, two modeling scenarios were run: one with a fourfold increase in base level lowering and one with a fourfold decrease in base level lowering. <br />
In the total block erosion models, which represent hard bedrock, the migration of knickpoints through the channels controls the onset of changes in valley width. As the channel comes into a new equilibrium slope, lateral erosion is either stalled (in the case of increased uplift) or accelerated (in the case of decreased uplift). In the undercutting-slump models, increasing uplift results in short-lived valley narrowing as the knickpoint moves up the channel. But after the model domain has reached equilibrium, higher uplift results in significantly wider bedrock valleys. This counterintuitive response reflects the nature of the model algorithm, which represents undercutting, slumping, and rapid downstream transport of sediment that occurs in soft bedrock. This class of models shows that in soft bedrock, higher uplift can increase channel mobility and result in wider bedrock valleys, rather than promoting less mobile channels and valley narrowing. Through these model experiments, we evaluate the conditions under which changes in base level fall result in wider bedrock valleys and more mobile channels and conditions under which the opposite occurs.<br />
}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=User:Langstoa&diff=59557User:Langstoa2013-03-25T19:57:54Z<p>Langstoa: </p>
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<div>{{Signup information member<br />
|First name member=Abigail<br />
|Last name member=Langston<br />
|Institute member=CIRES<br />
|Department member=Geological Sciences<br />
|Postal address 1 member=UCB 399<br />
|Postal address 2 member=2200 Colorado Ave.<br />
|City member=Boulder<br />
|Postal code member=80309<br />
|Country member=United States<br />
|State member=Colorado<br />
|Confirm email member=abigail.langston@colorado.edu<br />
|Working group member=Terrestrial Working Group, Hydrology Focus Research Group, Critical Zone Focus Research Group<br />
|Description of your CSDMS-related interests member=coupled hydrologic/landscape evolution modeling<br />
|How did you learn about CSDMS member=Greg Tucker<br />
}}<br />
<!-- --></div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=Meeting:Abstract_2013_CSDMS_meeting-018&diff=47249Meeting:Abstract 2013 CSDMS meeting-0182012-12-13T16:48:03Z<p>Langstoa: Created page with "{{CSDMS meeting 2013 not paid}} {{CSDMS meeting personal information template-2013 |CSDMS meeting first name=Abigail |CSDMS meeting last name=Langston |CSDMS meeting institute..."</p>
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<div>{{CSDMS meeting 2013 not paid}}<br />
{{CSDMS meeting personal information template-2013<br />
|CSDMS meeting first name=Abigail<br />
|CSDMS meeting last name=Langston<br />
|CSDMS meeting institute=University of Colorado<br />
|CSDMS meeting city=Boulder<br />
|CSDMS meeting country=United States<br />
|CSDMS meeting state=Colorado<br />
|CSDMS meeting email address=abigail.langston@colorado.edu<br />
|CSDMS meeting phone=479-200-4618<br />
}}<br />
{{CSDMS meeting abstract yes no<br />
|CSDMS meeting abstract submit=No<br />
}}<br />
{{CSDMS meeting abstract title template-2013<br />
|CSDMS meeting abstract title=<br />
}}<br />
{{CSDMS meeting abstract template<br />
|CSDMS meeting abstract=<br />
}}<br />
{{blank line template}}</div>Langstoahttps://csdms.colorado.edu/csdms_wiki/index.php?title=User:Langstoa&diff=15075User:Langstoa2010-09-01T17:27:56Z<p>Langstoa: </p>
<hr />
<div>{{Signup information member<br />
|First name member=Abigail<br />
|Last name member=Langston<br />
|Institute member=CIRES<br />
|Department member=Geological Sciences<br />
|Postal address 1 member=UCB 399<br />
|Postal address 2 member=2200 Colorado Ave.<br />
|City member=Boulder<br />
|Postal code member=80309<br />
|State member=Colorado<br />
|Country member=USA<br />
|Confirm email member=abigail.langston@colorado.edu<br />
|Working group member=Terrestrial Working Group<br />
|Focus research group member=Hydrology Focus Research Group<br />
|Description of your CSDMS-related interests member=coupled hydrologic/landscape evolution modeling<br />
|How did you learn about CSDMS member=Greg Tucker<br />
}}</div>Langstoa