DOI: 10.1002/2017JF004295
Scopus记录号: 2-s2.0-85041648122
论文题名: Measuring Mountain River Discharge Using Seismographs Emplaced Within the Hyporheic Zone
作者: Anthony R.E. ; Aster R.C. ; Ryan S. ; Rathburn S. ; Baker M.G.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 2 起始页码: 210
结束页码: 228
语种: 英语
英文关键词: fluvial discharge
; fluvial seismology
; hyporheic zone
; river monitoring
; sediment transport
; seismic noise
Scopus关键词: bedload
; fluvial process
; hyporheic zone
; monitoring
; mountain stream
; river channel
; river discharge
; river flow
; sediment transport
; seismic noise
; seismograph
; seismology
; Colorado
; Rocky Mountains
; United States
英文摘要: Flow and sediment transport dynamics in fluvial systems play critical roles in shaping river morphology, in the design and use of riverine infrastructure, and in the broader management of watersheds. However, these properties are often difficult to measure comprehensively. Previous work has suggested the use of proximal seismic signals resulting from flow and bed load transport to construct more complete records of these fluvial processes. We investigate a small (184 km2; < 20 m3/s), snowmelt-fed mountain river in the Northern Colorado Rocky Mountains during May–August 2015 to capture peak runoff with colocated measurements of discharge and seismic noise. Three-component seismometers were placed in close proximity to the channel bank (~1 m) within the hyporheic zone (at times submerged beneath the water table). We recorded a broad spectrum of seismic signals excited by discharge, including novel, low-frequency (0.1–2 Hz) signals observed predominantly on the horizontal components. The characteristics of these low-frequency signals are not consistent with an elastically propagating seismic wave. We instead infer that they likely arise from the sensor tilting in response to viscoelastic deformation occurring near the channel and propose large-scale turbulent eddies as a forcing mechanism. Calibrating horizontal seismic power with hydrograph flow rates over the course of a rainstorm for individual sensors, we demonstrate that these unique signals can be used to accurately estimate river discharge with simple regressions. This technique shows promise for augmenting seismic monitoring of rivers by enabling discharge rates to be estimated from outside the channel using easily deployed and noninvasive seismic instrumentation. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114601
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geosciences, Warner College of Natural Resources, Colorado State University, Fort Collins, CO, United States; Now at Albuquerque Seismological Laboratory, United States Geological Survey, Albuquerque, NM, United States; Rocky Mountain Research Station, United States Forest Service, Fort Collins, CO, United States
Recommended Citation:
Anthony R.E.,Aster R.C.,Ryan S.,et al. Measuring Mountain River Discharge Using Seismographs Emplaced Within the Hyporheic Zone[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(2)