CAREER: Quantifying the controls of wildfire, climate, and tectonics on the transition between soil-mantled and bedrock hillslopes

GSTDTAP

项目编号	1848321
	CAREER: Quantifying the controls of wildfire, climate, and tectonics on the transition between soil-mantled and bedrock hillslopes
	Roman DiBiase (Principal Investigator)
主持机构	Pennsylvania State Univ University Park
项目开始年	2019
	2019-05-01
项目结束日期	2024-04-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	165068(USD)
国家	美国
语种	英语
英文摘要	Where erosion strips soil from hillslopes faster than it can be replenished, bedrock hillslopes emerge, leading to steeper topography, sparser vegetation, flashier runoff, and changes to the mechanisms of sediment delivery from hillslopes to channels, amplifying the effects of destructive floods and debris flows. However, existing models developed for soil-mantled landscapes are poorly suited to explain the transition to bedrock hillslopes that emerges due to either short-term (e.g. wildfire) or long-term (e.g., tectonic) drivers of imbalance between soil production and erosion. This project aims to address this knowledge gap by quantifying the transition from soil-mantled to bedrock hillslopes that arises due to variations in the controls on the relative rates of soil production and soil erosion in mountain landscapes. Four field studies in granitic landscapes will exploit gradients in bedrock exposure to elucidate the underlying controls on soil production and erosion rates. This project will take advantage of increasingly high-resolution lidar, drone, and ground-based photogrammetry methods to efficiently map the transition from soil-mantled to bedrock hillslopes driven by wildfire, rock uplift rate, knickpoint retreat, and climate/vegetation cover. Measurements of in situ cosmogenic 10Be, soil and bedrock chemistry, and soil thickness will constrain soil production rates and establish the how soil production, soil weathering, and erosion rate vary across these gradients. Results from this project will be used to generate data-rich immersive virtual-reality (iVR) experiences compatible with low-cost self-contained iVR headset systems and incorporated into new laboratory exercises developed for an undergraduate geomorphology course. The educational component of this CAREER proposal will focus on assessing the effectiveness of iVR and traditional GIS-based laboratory exercises for engaging students and communicating concepts in hillslope geomorphology and critical zone science. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/213097
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Roman DiBiase .CAREER: Quantifying the controls of wildfire, climate, and tectonics on the transition between soil-mantled and bedrock hillslopes.2019.