Method for re-suspending underwater deposit under simulated wave disturbance in annular water tank and device thereof

Abstract

The invention discloses a method for disturbing and resuspending underwater sediments with simulated wave in circular sink, which is characterized in that: place the sediments collected without disturbance at the bottom of the circular sink; plant submerged plant over the sediments and overlaying water; use a plurality of blowers to simulate different wind forces and apply it on the overlaying water, so as to generate water flow; adjust the position of the blower port and its included angle with the overlay water surface to make basically even flow field in the sink; the sediments at the bottom of the sink is resuspended under the action of hydrodynamic force, so as to realize the simulation for the resuspension of sediments under the disturbance of wave with different forces in the water body of lake and river where submerged plant grows. The invention has the flowing advantages: simulate the resuspension process of sediments due to the motion of flow field under the disturbance of wave with different forces in natural water body of lake and river where submerged plant grows; realize the collection of samples in water body of different depths under relative stable condition for the resuspension of sediments; meet the requirements for the study over the ration relations among wave disturbance-motion of flow field-resuspension of sediments; simple structure, low cost and convenient application of relevant device.

Description

technical field

[0001] The invention relates to the simulation of the water body ecological environment of shallow lakes and river systems, in particular to a method and a device for resuspending sediments under the disturbance of different intensities of wind waves in water bodies such as lakes and rivers where submerged plants grow by using an annular water tank. Background technique

[0002] Sediment is an important destination and reservoir of nutrients and other pollutants in lakes and watersheds. Nutrients go through a series of physical, chemical and biological processes, and some of them are deposited at the bottom of lakes, becoming the internal load of nutrients in lakes. For shallow lakes and rivers, external dynamic disturbances (wind, waves, etc.) tend to resuspend the surface sediments at the bottom of the water body, which has a great impact on the physical, chemical and biological properties of the water body-sediment interface and the ecological environment c...

Examples

Embodiment Construction

[0012] Referring to the accompanying drawings, the annular water tank device that simulates the resuspension of underwater sediments under the disturbance of wind and waves has a structure that is an annular water tank, including a base 1, an annular water tank 2, a top cover 3, a loose leaf 4, a sampling nozzle with a valve 6, and a drain with a valve 7. Blast system and some fastening parts, etc. The inner and outer walls of the annular water tank 2 are composed of two rectangular and two curved plexiglass plates, the bottom of which is sealed with the base 1, the top is closely connected with the top cover 3, and the outer walls of the front and back of the annular water tank 2 are in the middle A plurality of sampling nozzles 6 with valves are arranged sequentially from top to bottom, and the spacing of each sampling nozzle 6 with valves can be equally or unequally spaced according to the purpose of the experiment, and a valve drain 7 is respectively arranged at the lower e...

technical field

[0001] The invention relates to the simulation of the water body ecological environment of shallow lakes and river systems, in particular to a method and a device for resuspending sediments under the disturbance of different intensities of wind waves in water bodies such as lakes and rivers where submerged plants grow by using an annular water tank. Background technique

[0002] Sediment is an important destination and reservoir of nutrients and other pollutants in lakes and watersheds. Nutrients go through a series of physical, chemical and biological processes, and some of them are deposited at the bottom of lakes, becoming the internal load of nutrients in lakes. For shallow lakes and rivers, external dynamic disturbances (wind, waves, etc.) tend to resuspend the surface sediments at the bottom of the water body, which has a great impact on the physical, chemical and biological properties of the water body-sediment interface and the ecological environment c...

Examples

Embodiment Construction

[0012] Referring to the accompanying drawings, the annular water tank device that simulates the resuspension of underwater sediments under the disturbance of wind and waves has a structure that is an annular water tank, including a base 1, an annular water tank 2, a top cover 3, a loose leaf 4, a sampling nozzle with a valve 6, and a drain with a valve 7. Blast system and some fastening parts, etc. The inner and outer walls of the annular water tank 2 are composed of two rectangular and two curved plexiglass plates, the bottom of which is sealed with the base 1, the top is closely connected with the top cover 3, and the outer walls of the front and back of the annular water tank 2 are in the middle A plurality of sampling nozzles 6 with valves are arranged sequentially from top to bottom, and the spacing of each sampling nozzle 6 with valves can be equally or unequally spaced according to the purpose of the experiment, and a valve drain 7 is respectively arranged at the lower e...

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