A sampling device suitable for macroinvertebrate surveys during flood periods

Abstract

The utility model relates to benthic animal sampling device field, concretely relates to a sampling device suitable for large benthic invertebrate investigation in flood period, including cement fixed base, drift net and buoy. The cement fixed base is made of hollow brick irrigation cement, its top surface central fixed has annular steel ring, and the edge is fixed with support rod, the drift net includes square net frame and net bag, and is fixed in the base side through support rod, the buoy is connected with the annular steel ring of base through the rope. The utility model discloses the self -weight of cement base resists the impact of water flow, solves the problem that the existing drift net is prone to lodging in flood period, and cannot be used in hard riverbed, and through the cooperation of buoy and rope, realizes the quick positioning and recovery in deep water environment, and the device is simple in structure, stable and reliable, and has wide bottom quality adaptability, and is suitable for benthic animal sampling in flood period, various bottom quality and complex water flow conditions.

Description

Technical Field

[0001] This utility model relates to the field of benthic animal sampling devices, specifically to a sampling device suitable for surveying large benthic invertebrates during flood season. Background Technology

[0002] Macrobenthic invertebrates are sensitive to environmental changes and are often used as indicator organisms of aquatic ecological health. Sampling, as a crucial step in aquatic ecosystem investigation and assessment, plays a fundamental role in biological monitoring of various freshwater environments such as rivers, lakes, reservoirs, and ponds. The applicability of sampling devices directly affects the assessment results of aquatic ecological health; data collection during flood season can fill the gaps in traditional equipment sampling during the flood season. Currently, drifting surveys of macrobenthic invertebrates mainly use the traditional drift net sampling method. This method has requirements for the riverbed substrate; in river sections with non-bedrock substrates, stability is poor, and it cannot be used during flood season. To meet the sampling needs of different aquatic environments, some benthic animal sampling devices have been developed, such as the Peterson mud sampler, triangular trawl, and artificial matrix basket sampler. Existing technologies have improved upon traditional methods to some extent, but still have shortcomings: insufficient flood resistance, poor stability, and poor adaptability to water depth.

[0003] Chinese utility model patent CN220751642U (announcement date: April 9, 2024) discloses a portable benthic animal net sampling device, including a holding rod and a D-shaped collection net. The holding rod is detachably connected to the D-shaped collection net with a threaded connection for easy storage. The D-shaped collection net includes a semi-circular mesh ring and a connected screen. The bottom of the semi-circular mesh ring has serrated digging blades. A retractable rope is provided near the mesh ring on the screen, and a detachable collection net bag is provided at the tail end of the screen. This utility model has a simple structure, is easy to carry, and can efficiently collect benthic animals from riverbed sediment, and conveniently collect the collected benthic animals into a sampling bottle.

[0004] Chinese invention patent CN117882684A (published on April 16, 2024) discloses a sampling device and method for deep-water lake benthic animals. The sampling device includes a sampler and a controller. The sampler includes a main cylinder, a lifting and fixing mechanism, a mud-breaking drill mechanism, a mud-scooping and guiding mechanism, an inner crossbar, a rod-shaped vibrator, a collection hopper, and a suction pump. The sampling method includes sampling point layout, monitoring and sampling, and post-sampling processing steps. This invention separates the silt during the sampling process, requiring only simple sorting when retrieving the samples later.

[0005] Therefore, developing a sampling device that combines flood resistance, low requirements for riverbed sediment, and standardized operation is key to solving the problem of benthic animal monitoring during flood season. Utility Model Content

[0006] To address the aforementioned issues, this invention proposes a sampling device suitable for surveying large benthic invertebrates during flood season, comprising a cement-fixed base, a drifting net, and floats; The cement fixing base is made of hollow bricks filled with cement, with a ring steel ring fixed in the center of its top surface and a support rod fixed on its side edge; The drift net includes a square mesh opening and four corner mesh bags connected to the rear of the mesh opening. The mesh opening is fixed to the side of the cement fixed base by the support rod. The pontoon is connected to the annular steel ring of the cement-fixed base by ropes.

[0007] Furthermore, the cement fixing base includes hollow bricks, annular steel rings, and support rods.

[0008] Furthermore, the annular steel ring is fixed in the center of the hollow brick.

[0009] Furthermore, there are at least two support rods, with their bottom ends fixed to the edge of the cement base, and after being bent twice at the bottom of the cement base, they are fixed to the side edge of the cement base.

[0010] Furthermore, the hollow brick is rectangular with symmetrical holes filled with concrete at both ends and a long strip-shaped hole in the center for fixing the annular steel ring.

[0011] Furthermore, the drifting net includes a square mesh opening, four corner mesh bags, and a sample storage bag, with the entire drifting net located on the side of the cement fixed base.

[0012] Furthermore, the four corner mesh bags are fitted onto the square mesh openings, with the openings being square.

[0013] Furthermore, the sample storage bag is located at the end of the four corner mesh bag away from the square mesh opening.

[0014] Furthermore, the side length of the square mesh opening is 25-35cm.

[0015] Furthermore, the four corner mesh bags are 0.8-1.2m long, have a mesh size of 40 meshes, and have a sample storage bag at each end.

[0016] Furthermore, the length of the support rod is 45-55cm.

[0017] Furthermore, there are at least two pontoons, which are symmetrically fixed to the upper surface of the cement base by ropes, and are hollow cylindrical structures.

[0018] Furthermore, the drift net is secured to the support rod by cable ties.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a sampling device suitable for surveying large benthic invertebrates during flood season. By adding a cement fixing base, the sampling device can maintain stable and reliable sampling when the water flow velocity is high during flood season. The mesh opening is kept facing the water flow direction to effectively collect samples.

[0020] 2. This utility model provides a sampling device suitable for surveying large benthic invertebrates during flood season. It is applicable to riverbeds of various substrate types, including hard bedrock, pebble beaches, and other environments where traditional devices cannot be used. Through the combination of floats and ropes, the device can be positioned and, after sampling, the entire device can be easily retrieved from the bottom of the water to the surface by pulling the ropes without the need for underwater operations.

[0021] 3. This utility model provides a sampling device suitable for surveying large benthic invertebrates during flood season. The device can be deployed simply by sinking it to the bottom of the water, eliminating the need for laborious pole insertion. During retrieval, the float serves as a water surface marker, and retrieval can be completed with the help of a lifting rope. The operation is simple, efficient, and safe.

[0022] 4. This utility model has low manufacturing cost, does not require complex and precision parts, and uses materials such as cement, hollow bricks, and steel rings. It has a sturdy structure, is corrosion-resistant and erosion-resistant, has a long service life, and reduces maintenance costs.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] in: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a schematic diagram of the drift net structure; Figure 3 A schematic diagram of the cement-fixed base.

[0027] Attached reference numerals: 1-Cement fixed base; 11-Hollow brick; 12-Ring steel ring; 13-Support rod; 2-Floating net; 21-Square net opening; 22-Four-corner net bag; 23-Sampling bag; 3-Float; 4-Rope. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0029] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0030] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0031] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it have an "or" relationship.

[0032] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0033] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0034] Example 1 This embodiment describes a sampling device suitable for surveying large benthic invertebrates during flood season. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a schematic diagram of the overall sampling device.

[0035] The sampling device includes a cement base 1, a drift net 2, and a float 3; The cement fixing base 1 is made of hollow bricks 11 filled with cement, and a ring steel ring 12 is fixed in the center of its top surface, and a support rod 13 is fixed on its side edge. The drift net 2 includes a square mesh opening 21, four corner mesh bags 22 connected to the rear of the mesh opening, and a sample storage bag 23. The mesh opening is fixed to the side of the cement fixed base by the support rod 13. The pontoon 3 is connected to the annular steel ring 12 of the cement fixed base 1 by a rope 4.

[0036] Preferably, there are two floats 3, which are symmetrically fixed to the upper surface of the cement base 1 by ropes 4. They are hollow cylindrical structures, and the sampling device can be lifted out of the water by connecting ropes after sampling.

[0037] The technical effects achieved in this embodiment are as follows: the sampling device provided in this embodiment ensures the stability of the device in floods through the self-weight of the cement-cast base, avoiding the problem of traditional devices being prone to collapse, and has low requirements for riverbed sediment; at the same time, the combined design of the float and rope enables convenient positioning and retrieval of the device in deep-water sampling areas. The device has a simple structure, is easy to operate, and has wide adaptability.

[0038] Example 2 Based on Example 1, this example describes the specific structure of the cement fixing base. Please refer to Example 1. Figure 3 .

[0039] The cement fixing base 1 includes a hollow brick 11, an annular steel ring 12, and a support rod 13.

[0040] Preferably, the annular steel ring 12 is fixed in the center of the hollow brick 11.

[0041] Preferably, there are at least two support rods 13, with the bottom end fixed to the edge of the cement base 1, and after being bent twice at the bottom of the cement base 1, they are fixed to the side edge of the cement base 1.

[0042] They are symmetrically fixed to the side edges of the two hollow bricks 11.

[0043] Preferably, the hollow brick 11 is rectangular, with symmetrical holes for filling with concrete at both ends, and a long strip-shaped hole in the center for filling with cement to fix an annular steel ring 12.

[0044] Preferably, the length of the support rod 13 is 50cm.

[0045] The technical effects achieved in this embodiment are as follows: the cement-fixed base, through its structure of hollow bricks filled with cement, provides sufficient self-weight, ensuring the overall stability of the sampling device under the impact of high-speed water flow during floods; at least two symmetrically arranged support rods provide stable and balanced support for the drift net, preventing the net from overturning. This base structure is simple, robust, and durable, providing a foundation for stable sampling in complex water flow and sediment environments.

[0046] Example 3 Based on Examples 1-2, this example describes the structure of the drift net. Please refer to [link / reference]. Figure 2 .

[0047] The drift net 2 includes a square mesh opening 21, four corner mesh bags 22, and a sample storage bag 23.

[0048] Preferably, the four-corner mesh bag 22 is fitted onto the square mesh opening, and the opening is square.

[0049] Preferably, the sample storage bag 23 is located at the end of the four-corner mesh bag 22 away from the square mesh opening 21.

[0050] Preferably, the side length of the square mesh 21 is 30cm.

[0051] Preferably, the four-corner mesh bag 22 is 1m long, has a mesh size of 40 meshes, and has a sample storage bag 23 at the end of the four-corner mesh bag 22.

[0052] Preferably, the drift net 2 is fixed to the support rod 13 by cable ties.

[0053] The technical effects achieved by this embodiment are as follows: the drift net provides a standardized sampling entrance through the square mesh opening, ensuring the comparability and standardization of sampling data; the four corner mesh bags and sample storage bags can capture and collect biological samples, preventing biological escape or damage; the drift net is detachably fixed to the support rod by cable ties, which facilitates installation, replacement and recycling.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any equivalent substitutions, structural improvements, adjustments to the functional implementation methods, as well as reasonable adjustments to parameters, module integrations, or step sequences based on the concept of this utility model, made within the spirit and principles set forth in this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sampling device suitable for surveying large benthic invertebrates during flood season, characterized in that, Includes a cement base (1), a drift net (2), and a pontoon (3); The cement fixing base (1) is made of hollow bricks (11) filled with cement. A ring steel ring (12) is fixed in the center of its top surface, and a support rod (13) is fixed on its side edge. The drift net (2) includes a square mesh opening (21) and four corner mesh bags (22) connected to the rear of the mesh opening. The mesh opening is fixed to the side of the cement fixed base (1) by the support rod (13). The pontoon (3) is connected to the annular steel ring (12) of the cement fixed base (1) by a rope (4).

2. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, is characterized in that, The cement fixing base (1) includes a hollow brick (11), an annular steel ring (12), and a support rod (13). The annular steel ring (12) is fixed in the center of the hollow brick (11); The support rod (13) consists of at least two rods, with the bottom end fixed to the edge of the cement base (1) and then bent twice at the bottom of the cement base (1) before being fixed to the side edge of the cement base (1).

3. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 2, is characterized in that... The hollow brick (11) is rectangular with symmetrical holes filled with concrete at both ends and a long strip hole in the center for fixing the annular steel ring (12).

4. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The drift net (2) includes a square mesh opening (21), four corner mesh bags (22) and a sample storage bag (23); The four-corner mesh bag (22) is fitted onto the square mesh opening (21), and the opening is square; The sample storage bag (23) is located at the end of the four-corner mesh bag (22) away from the square mesh opening (21).

5. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The side length of the square mesh opening (21) is 25-35cm.

6. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The four-corner mesh bag (22) is 0.8-1.2m long and has a mesh size of 40. A sample storage bag (23) is provided at the end of the four-corner mesh bag (22).

7. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The length of the support rod (13) is 45-55cm.

8. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The pontoons (3) are at least two in number and are symmetrically fixed to the upper surface of the cement base (1) by ropes (4), and are hollow cylindrical structures.

9. A sampling device suitable for surveying large benthic invertebrates during flood season, as described in claim 1, characterized in that, The drift net (2) is fixed to the support rod (13) by cable ties, and the entire drift net is located on the side of the cement fixed base.

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