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Examining and Evaluating Important Methods for Marine Sediment Collection

Nagarajan G


In marine scientific research, sediment is extremely important for marine geology and microbial communities. The scientific research findings are related to the in-situ information of the sediment samples that are collected from the sea bed. Van Veen grab samplers (VVG) are designed for obtaining sediment and become indispensable scientific equipment. The sediment grab sampler should be lightweight, compact easy to handle for operation and high adaptability to extreme sea conditions. This paper explains the newly designed Grab sediment sampler, samples taken at different locations and the utilization of the sampler on board research ships. On this basis, a review and analysis were conducted at various sediment samplers. This paper summarizes the existing grab samplers that are used on board by various scientific communities and a comparative study of the VVG sampler has been done based on the volume of sediments sampling collected during the entire scientific cruise programme. VVG samplers are available in different capacities. Sampler weights ranging from 25 kg to 50 kg were chosen for scientific operation for collecting the sediment samples from the bottom of shallow seas. It is suitable for collecting underwater sediments (Deposit/Sediment/Sludge). VVG Samplers are mainly designed for simple use in normal weather conditions of the sea. It allows the users to select the most suitable scientific equipment on board for a specific collection of Grab sediments are collected from the sea bed at different latitude and longitude. VVG samplers are mainly used for collecting the sediment at different locations of the sea bed. The collected samples are used to measure the concentration of pH, Dissolved oxygen and total residual chlorine of the substance. The purpose of sediment sampling is to monitor the physical and Chemical analysis of sediments and monitor pollutants released into the sea. The collection of the samples from the sediment grab must be consistent throughout the sampling location and technique required by the scientific community.

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