DOI: 10.5194/hess-22-1917-2018
Scopus记录号: 2-s2.0-85044238613
论文题名: Active heat pulse sensing of 3-D-flow fields in streambeds
作者: Banks E ; W ; , Shanafield M ; A ; , Noorduijn S ; , McCallum J ; , Lewandowski J ; , Batelaan O
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 3 起始页码: 1917
结束页码: 1929
语种: 英语
Scopus关键词: Evolutionary algorithms
; Flow patterns
; Markov processes
; Monte Carlo methods
; Optimization
; Stream flow
; Assessment technique
; Biogeochemical process
; Differential Evolution
; Heat transport equation
; Hydraulic conditions
; Markov chain Monte Carlo method
; Temperature response
; Water sediment interface
; Uncertainty analysis
; flow pattern
; hydrodynamics
; hyporheic zone
; Markov chain
; parameter estimation
; sensor
; stream bed
; temperature
; three-dimensional flow
; time series
; uncertainty analysis
英文摘要: Profiles of temperature time series are commonly used to determine hyporheic flow patterns and hydraulic dynamics in the streambed sediments. Although hyporheic flows are 3-D, past research has focused on determining the magnitude of the vertical flow component and how this varies spatially. This study used a portable 56-sensor, 3-D temperature array with three heat pulse sources to measure the flow direction and magnitude up to 200gmm below the water-sediment interface. Short, 1gmin heat pulses were injected at one of the three heat sources and the temperature response was monitored over a period of 30gmin. Breakthrough curves from each of the sensors were analysed using a heat transport equation. Parameter estimation and uncertainty analysis was undertaken using the differential evolution adaptive metropolis (DREAM) algorithm, an adaption of the Markov chain Monte Carlo method, to estimate the flux and its orientation. Measurements were conducted in the field and in a sand tank under an extensive range of controlled hydraulic conditions to validate the method. The use of short-duration heat pulses provided a rapid, accurate assessment technique for determining dynamic and multi-directional flow patterns in the hyporheic zone and is a basis for improved understanding of biogeochemical processes at the water-streambed interface. © 2018 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79351
Appears in Collections: 气候变化事实与影响
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作者单位: National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, SA, Australia; Department Ecohydrology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University of Berlin, Berlin, Germany
Recommended Citation:
Banks E,W,, Shanafield M,et al. Active heat pulse sensing of 3-D-flow fields in streambeds[J]. Hydrology and Earth System Sciences,2018-01-01,22(3)