DOI: 10.5194/hess-22-5615-2018
论文题名: A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications
作者: Maxwell B.M. ; Birgand F. ; Smith B. ; Aveni-Deforge K.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 11 起始页码: 5615
结束页码: 5628
语种: 英语
Scopus关键词: Contamination
; Hydrochemistry
; Pumping plants
; Aquatic environments
; Biogeochemical process
; Cross contamination
; High frequency data
; High frequency HF
; Land-water interfaces
; Short circuiting
; Spatial variability
; Biological water treatment
; aquatic environment
; automation
; bioreactor
; experimental study
; freshwater sediment
; measurement method
; porewater
; pumping
; seasonal variation
; spatial variation
; water chemistry
英文摘要: An automated multiplexed pumping system (MPS) for high-frequency water chemistry measurements at multiple locations previously showed the ability to increase spatial and temporal data resolution and improve understanding of biogeochemical processes in aquatic environments and at the land-water interface. The design of the previous system precludes its use in volume-limited applications in which highly frequent measurements requiring a large sample volume would significantly affect observed processes. A small-volume MPS was designed to minimize the sample volume while still providing high-frequency data. The system was tested for cross-contamination between multiple sources, and two applications of the technology are reported. Cross-contamination from multiple sources was shown to be negligible when using recommended procedures. Short-circuiting of flow in a bioreactor was directly observed using high-frequency porewater sampling in a well network, and the small-volume MPS showed high seasonal and spatial variability of nitrate removal in stream sediments, enhancing data collected from in situ mesocosms. The results show it is possible to obtain high-frequency data in volume-limited applications. The technology is most promising at the reach or transect scale for observing porewater solute dynamics over daily timescales, with data intervals < 1 h for up to 12 locations. © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163152
Appears in Collections: 气候变化与战略
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作者单位: Maxwell, B.M., Biological and Agricultural Engineering, North Carolina State University, 3110 Faucette Drive, Raleigh, 27695, United States; Birgand, F., Biological and Agricultural Engineering, North Carolina State University, 3110 Faucette Drive, Raleigh, 27695, United States; Smith, B., Sungate Design Group, 905 Jones Franklin Road, Raleigh, 27606, United States; Aveni-Deforge, K., Biological and Agricultural Engineering, North Carolina State University, 3110 Faucette Drive, Raleigh, 27695, United States
Recommended Citation:
Maxwell B.M.,Birgand F.,Smith B.,et al. A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications[J]. Hydrology and Earth System Sciences,2018-01-01,22(11)