Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Design of Multifunctional Fidelity Sampling Equipment for Polar Lake Sediments and Pore Water
Xiaoqing Peng, Xueyu Ren, Xiaoling Le, Wei Wang, Jiawang Chen*, Hai Zhu
Ocean College, Zhejiang University.
Zhoushan City, Zhejiang Province, China

the sediments of some deep polar lakes, Japanese and American
scientists use gravity coring and diver diving to pack the samples instainless steel pipes or PVC pipes (Makinson, 2014; Chaparro, 2017;
Mazumder, 2017). The samples taken are short and cannot guarantee low
disturbance and no pollution. It is quite dangerous in harsh environments.
At present, the traditional samplers in the world are all without powersource, which can only meet the acquisition of sediment samples, and theefficiency is low. Due to the special environment and climatic conditionsof Antarctica, the sampler must be resistant to low temperature, portable,
easy to operate, fast in sampling, and at the same time low disturbanceand pollution-free to meet the needs of scientific analysis. Therefore, thispaper designs a set of high-fidelity sampling device for sediment andpore water suitable for polar conditions, which is portable, easy tooperate, and can be equipped with a variety of sensors. It can be usedaccording to different work requirements and sampling lake conditions.
The sampler module performs multi-scenario and multi-functional
combinations to improve sampling efficiency, and at the same time, theformation information of in-situ sampling process can be recorded in realtime. The efficiency of in situ acquisition and analysis is improved,
which is of great significance to polar scientific research and provides a
design idea for polar lake sediment sampling device.

ABSTRACTPolar lake sediment is an indispensable research sample in polar geology
and polar environment, but the current fidelity sampling technology
related to polar lakes is relatively weak. In this paper, a multifunctional
fidelity sampling system for polar lake sediments and pore water isdesigned, which is portable, easy to operate, and can be equipped withmultiple sensors. Different sampler modules can be combined to improve
sampling efficiency and achieve in-situ high-fidelity sampling of polarlakes. It has created equipment and technical conditions for the study oflake sediments under extreme conditions, and is of great significance tothe scientific research of polar regions.

KEY WORDS: Polar lakes; sediments; pore water; high-fidelity
sampling; equipment.

INTRODUCTION
The biological components of polar freshwater ecosystems are relatively
simple (Burger, 1985; Smith, 1985), with large amounts of excess
nutrients accumulating directly on sedimentary layers. In the study of therelationship between global change and polar ecosystems, the changes ofexcess nutrients in sediments are affected by global climate change andcause corresponding changes in other components in the system.
Therefore, studying the changes of these substances in sediments canreflect the changes of the global climate to a certain extent (Kerr,1986;Rowland, 1986; Crutzen, 1986; Feldstein, 2011). At the same time, thesediments of polar lakes are rich in microorganisms, and the changes inthe structure and biomass of lake organisms directly reflect the changes
in the physical and chemical properties of the lakes and the evolution of
the climatic environment (Franzmann, 1993; Taton, 2006). Therefore,
polar lakes are also excellent experimental sites for studying theecological evolution of lakes.

Device design
This paper mainly designs a multi-functional, modular, multi-scenario,
portable and reliable sampling device suitable for polar lakes, which canbe widely used in the sampling of sediments and pore water in various
polar lakes, and puts forward a design idea for high-fidelity samplingtechnology in related fields. The overall schematic diagram of the deviceis shown in Fig.1, which includes a mounting bracket, a sampling device,a connecting cable, a generator, a winch and a sled platform carrying all
the devices. After the device is assembled, it is placed in the samplingarea, and then the sampling device is lowered to the bottom of the lakeby controlling the winch. The sampler was controlled to penetrate into
the bottom of the lake, and the sediment or pore water samples of thecorresponding strata were obtained in the sampling tube inside thesampling device, so as to realize the in-situ fidelity sampling of thesediments and pore water of the polar lakes. At the same time, a variety
of sensors are equipped on the sampler, which can record the electricalconductivity, temperature, soil pressure and other parameters of thestratum during the sampling process in real time.

At present, the underwater sediment sampling technology has become
mature and is widely used in the research fields of lake and ocean
geological structure and oil and gas resource exploration (Hodgson,2016). Internationally, since 1997, the sediment sampling of polar lakes
has mainly used PVC pipes (Rix,2019; Toro,2013) and gravity piston
corers (Wagner, 2003; Coolen, 2004; Wagner, 2006; Kurosawa, 2011;Singh, 2012; Carrizo, 2019) for manual sampling of shallow lakes. For1376