气候变化领域集成服务门户(CCPortal): A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications

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DOI	10.5194/hess-22-5615-2018
	A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications
	Maxwell B.M.; Birgand F.; Smith B.; Aveni-Deforge K.
发表日期	2018
ISSN	1027-5606
起始页码	5615
结束页码	5628
卷号	22 期号:11
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.
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159869
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
推荐引用方式 GB/T 7714	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],2018,22(11).
APA	Maxwell B.M.,Birgand F.,Smith B.,&Aveni-Deforge K..(2018).A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications.Hydrology and Earth System Sciences,22(11).
MLA	Maxwell B.M.,et al."A small-volume multiplexed pumping system for automated; high-frequency water chemistry measurements in volume-limited applications".Hydrology and Earth System Sciences 22.11(2018).