Portable tidal beach swamp sediment sampler and sampling method thereof

Abstract

The invention relates to a portable tidal beach swamp sediment sampler and a sampling method thereof. The sampler comprises a hollow sampling pipe, a handrail, an end sealing plate and one or more steel wire ropes, wherein small holes matched with the one or more steel wire ropes in number are formed in the side wall of the lower end of the sampling pipe; the lower ends of the one or more steel wire ropes pass by the small holes from the outer side of the sampling pipe, penetrate into the sampling pipe and are connected with the end sealing plate; when the one or more steel wire ropes are upwards tensioned, the end sealing plate is pulled to rotate to seal the lower end surface of the sampling pipe; a plurality of large-area hollowed-out holes are formed in the side wall of the sampling pipe; the upper part of the sampling pipe is connected with the handrail. According to the sampler and the sampling method thereof, completeness of sampled samples is guaranteed, sampling is easy to realize, and the sampler is simple in structure, labor-saving during operation and good in use effect.

Description

technical field [0001] The invention relates to a portable tidal flat swamp sediment sampler and a sampling method thereof, which are suitable for the technical field of sediment background investigation in physical geography, ecology, soil science and environmental science. Background technique [0002] Tidal flat swamp is a unique type of wetland in the zone where land interacts with water bodies such as oceans, rivers and lakes. Tidal flat wetlands have high primary productivity and rich organic matter content, and are also one of the ecosystems that are extremely sensitive to global changes and human activities. The biogeochemical process of tidal marsh sediments is a common focus of physical geography, ecology, soil science and environmental science, and the primary task of the background investigation of tidal marsh sediments is to obtain a large number of sediment samples. [0003] Tidal flat swamps have been in a state of intermittent flooding for a long time, makin...

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Problems solved by technology

[0005] The above traditional samplers will encounter many difficulties in actual use: 1) When the sampling personnel penetrate the sampler into the ground, they need to overcome a large frictional resistance (from the friction between the pipe wall and the sediment), which makes the process 2) The traditional sampler has no bottom support, during the sample taking process, some sediment cores will fall off due to gravity, and some samples will be lost. Even if the sampler penetrates the ground to a depth of more than 1m, effective sampling The depth often can only reach 30-50cm, which also makes the port of the soil core not smooth; 3) During the sampling process, the narrow barrel-shaped steel pipe is often not easy to cut off the root system of the plant, resulting in sampling failure, and even damage the instrument in serious cases; 4) The piston pushes When the rod "pushes out" the sediment core, it is difficult to control in operation, and often destroys the structural properties of the sediment, making the vertical stratification of the soil core sample inconsistent with that of the natural sediment; 5) After the traditional sampler is used, there will be a large number of The sediment attached to the side wall is not easy to clean; 6) Even if you only want to take a sediment sample at a certain depth, you must "squeeze out" all the sediment to obtain it, which is time-consuming and labor-intensive; 7) Using traditional sampling Generally, the soil core obtained by this method can only obtain pore water through high-speed "centrifugation" of a centrifuge, but this method of "centrifugation" to obtain pore water will "oxidize" part of the reduced substances, which will distort some pore water index values

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