In-situ stratified sampling pipe for surface sediments and method

Abstract

The invention provides an in-situ stratified sampling pipe for surface sediments and a method. The in-situ stratified sampling pipe comprises a water taking pipe, a mud taking pipe, a bottom cover, a cutting head and a plurality of stratification cutting slices, wherein the bottom of the water taking pipe is connected with the mud taking pipe, and the mud taking pipe comprises a plurality of mud taking pipe components; the cross section of the inner wall of each mud taking pipe component is in a square shape, and the bottoms of three sides of the square are provided with inward arc grooves; a sealing slot is formed in the fourth side, and the bottom cover and the cutting head are detachably connected with a base at the bottom of the mud taking pipe. The in-situ stratification of sediment samples collected by the sampling pipe and the method provided by the invention can be realized. The sampling pipe and the method provided by the invention have the advantages that the structure is simple, the operation is easy, and the carrying is convenient, the sediments can be directly stratified, the sequence fidelity of the sediment samples is realized, the sampling efficiency is high, and the sampling pipe is suitable for field operation. The sampling pipe has very good practical value and broad application prospect in the technical field of ecological environmental protection.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to an in-situ layered sampling tube and method for surface sediments. Background technique [0002] As an important part of aquatic ecosystems such as lakes and reservoirs, sediments are the main source of nutrients required for the growth of aquatic plants, and are also important places for the habitat and reproduction of aquatic biological communities. The sediment-water interface is an environmental boundary composed of two phases of water and sediment. The sediment particle density, particle composition, chemical activity, pH, dissolved oxygen (DO), oxidation-reduction potential (Eh), biological activity, etc. There are obvious gradient changes, and it is the environmental boundary with the most significant differences in physical, chemical and biological characteristics of aquatic ecosystems; physical and chemical reactions that occur in the interface with the ...

AI Technical Summary

Problems solved by technology

In order to obtain the in-situ sediment multi-sampling column sampler, but the in-situ sediment samples obtained by the existing technology, the samples need to be transported to the laboratory, and the layered samples of the sediment are obtained by freeze-drying or top fractionation method. Such methods still disturb the sediments, resulting in poor sequence fidelity

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