| 项目编号: | 1632798
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| 项目名称: | Quantifying and Predicting the Attenuation of Downstream Fluxes Associated with Beaver Meadows |
| 作者: | Tim Covino
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| 承担单位: | Colorado State University
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| 批准年: | 2016
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| 开始日期: | 2016-08-01
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| 结束日期: | 2018-07-31
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| 资助金额: | 295626
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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: | beaver meadow
; downstream-flux attenuation
; downstream attenuation
; beaver activity
; downstream flux
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| 英文摘要: | Predicted warming and drying across much of the U.S. will stress existing water supplies for consumptive activities, as well as ecosystem health and resilience. This is particularly true for the arid and semi-arid regions of the western U.S., including headwater states such as Colorado. Given the predicted increased potential for droughts and floods in the region, the ability to retain and gradually release water from surface and subsurface retention zones within river basins is important. This study will evaluate the potential for beaver meadows which contain numerous dams, ponds, and multi-thread channels, to substantially attenuate downstream fluxes of water, sediment, organic matter, and nitrate relative to river segments without beaver activity. Results of this work will be important for restoring river function, attenuating flood pulses and augmenting low flow periods, as well as for mitigating potential effects of climate change.
In this study investigators will (1) quantify the magnitude of downstream-flux attenuation as a function of size of the beaver meadow relative to the contributing drainage area and activity/spatial heterogeneity of the meadow, (2) evaluate how meadow position within a catchment affects downstream attenuation, (3) assess the extent and magnitude of landscape alteration in the region, and (4) estimate the potential influence of landscape alteration on hydrologic dynamics across larger spatial extents. Quantitative interdisciplinary methods from both hydrology and geomorphology will be leveraged to quantify relationships between catchment morphology, storage, and flux and to scale these dynamics to larger spatial extents. The research will develop new insights into the buffering capacities offered by retention zones in the form of beaver meadows and develop new conceptualizations and numerical models on the manner in which reach-scale behavior influences catchment-scale process. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91692
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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: | |
Tim Covino. Quantifying and Predicting the Attenuation of Downstream Fluxes Associated with Beaver Meadows. 2016-01-01.
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