| 项目编号: | 1632903
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| 项目名称: | EAGER: Dynamic Response of the Soil Production Function to Erosion Rates |
| 作者: | Arjun Heimsath
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| 承担单位: | Arizona State University
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| 批准年: | 2016
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| 开始日期: | 2016-05-15
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| 结束日期: | 2018-04-30
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| 资助金额: | 26574
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | soil thickness
; soil
; erosion
; project
; catchment-mean erosion rate
; erosion rate
; soil-mantled landscape
; lithology-controlled maximum soil production rate
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| 英文摘要: | ABSTRACT
A non-technical description of the project, which explains the project's significance and importance
The formation of soil and its removal from the landscape are two of the most important geological processes that intersect with the livelihood and well-being of human populations. Soil is needed for agriculture, and the characteristics of this material affect the availability of groundwater and the ecological balance of different landscapes. Erosion can be very damaging and the rate at which material is transported to streams will have an impact on flooding. This project will examine the rate at which soil is produced and eroded in order to better assess the controls on the distribution of this very important natural resource.
A technical description of the project
Soil thickness is a fundamentally important characteristic of the Earth's surface that plays an essential role in hydrology, ecology, biogeochemistry, erosion, and transport processes. The prevailing theory predicts that mean soil thickness decreases with increasing catchment-mean erosion rate and that soil-mantled landscapes give way to rocky ones when this erosion rate exceeds the climate- and lithology-controlled maximum soil production rate. However, initial observations indicate that soil thickness is much more variable across otherwise similar landscapes than can be explained by this theory. This project will use a combination of in situ and detrital cosmogenic radionuclide analyses and digital elevation models across a suite of carefully selected field sites to quantify the fundamental influences on soil thickness in geologically active regions. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92362
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Arjun Heimsath. EAGER: Dynamic Response of the Soil Production Function to Erosion Rates. 2016-01-01.
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