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Method and device for simulating bottom sludge erosion and transmission feature in rectangular trough

A technology of transmission characteristics and sediment, which is applied in the fields of sediment transmission characteristics, sediment erosion and resuspension characteristics, can solve the problems of uncontrollable external force and difficulty in maintaining the original structure of sediment, so as to achieve convenient capture and overcome uncontrollable external force conditions , to achieve the effect of cutting action

Inactive Publication Date: 2012-09-19
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to address the deficiencies in the prior art, and provide a method and device for simulating sediment erosion and transport characteristics in a rectangular tank, which overcomes the uncontrollable external force and the difficulty in maintaining the original structure of the sediment in the prior art. , Lack of understanding of the composition of suspended sediment and suspended sediment, etc.

Method used

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  • Method and device for simulating bottom sludge erosion and transmission feature in rectangular trough
  • Method and device for simulating bottom sludge erosion and transmission feature in rectangular trough
  • Method and device for simulating bottom sludge erosion and transmission feature in rectangular trough

Examples

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Embodiment 1

[0019] Embodiment 1: as Figures 1 to 5 As shown, a device for simulating sediment erosion and transport characteristics in a rectangular tank, including a water inlet tank 1, a prolate tank 2, a water outlet tank 3, a water storage tank 4, a columnar mud sample tube 5, an inclined plate sedimentation tank 6, and a fine yarn Net 7, water pump 8, described inlet tank 1 and outlet tank 3 are provided with inlet tank slot 9 and outlet tank slot 10, by inserting inlet tank plate 11 and outlet tank plate 12, A first overflow water tank 13 and a second overflow water tank 14 are arranged in the water tank and the water outlet tank, and the bottom water outlet 15 of the water inlet tank and the water inlet of the elongated water tank 2 are fixed by screws and silica gel. Sealed connection, the water outlet of the oblong water tank 2 is fixed and sealed with the bottom water inlet 16 of the water outlet tank 3 through screws and silica gel, and the water outlet 33 of the water storage...

Embodiment 2

[0028] Example 2: The undisturbed sediment was collected in the Meiliangwan Lake area of ​​Taihu Lake (120°10′31″E, 31°30′30″N), the particle size was 0.3-1000 μm, and the bulk density was 1.16-1.74 g / cm 3 , the experimental water was taken from the undisturbed water of Taihu Lake. Design the size of the water inlet tank 1 as length × width × height = 40cm × 30cm × 100cm, the size of the prolate tank 2 as length × width × height = 200cm × 20cm × 10cm, the size of the outlet tank 3 as length × width × height = 40cm ×30cm×50cm, the size of the water storage tank 4 is length×width×height=80cm×60cm×80cm. The water inlet tank plate 11 configured in the water inlet tank 1 includes 7 partitions with a thickness of 1 cm (each height is 20, 30, 40, 50, 60, 70, 80 cm), and the water outlet tank 3 is equipped with an outlet and inlet tank The inserting board 12 includes 4 partitions with a thickness of 1 cm (the heights of each are 10, 20, 30, 40 cm). Adjust the height of the partition...

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Abstract

The invention discloses a method and a device for simulating bottom sludge erosion and transmission feature in a rectangular trough. The method comprises the following steps of: applying different constant current scouring forces to the surface of columnar bottom sludge with an un-disturbed structure in the vertical direction, so that the columnar bottom sludge is eroded under the actions of different hydrodynamic forces, and simulation of the bottom sludge erosion under the disturbance of different hydrodynamic force strengths is realized; and respectively capturing a suspended load and a bed load in the eroded bottom sludge at the same time, so that simulation of the transmission feature of the eroded bottom sludge is realized. The device comprises a water inlet tank, the flat elongated trough, a water outlet tank, a water storage tank, a columnar sludge sample pipe, a bed load sand capturing device and a suspended load sand capturing device. According to the method and the device, the problems that the external force condition is uncontrollable and the original structure of the bottom sludge is kept are solved by using a constant acting force produced by a constant water level difference on the surface of the bottom sludge; and the bed load and the suspended load produced after the bottom sludge is suspended are effectively collected by adopting different devices respectively, so that an effect of simulating the bottom sludge erosion is achieved.

Description

technical field [0001] The invention relates to the technical field of water body ecological environment simulation of shallow lakes and river systems, in particular, the use of rectangular tanks to simulate sediment erosion and resuspension characteristics, the proportion of transported mass and suspended mass, and the bottom sediment erosion and resuspension characteristics of rivers and lakes under different hydrodynamic intensity disturbances. Method and apparatus for mud transport characterization. Background technique [0002] Under hydrodynamic action, lake or river sediments are prone to erosion and resuspension, and this process will cause the release of nutrients in surface sediments and changes in biomass. The surface erosion rate of sediment is defined as the amount of sediment erosion per unit area of ​​the bed in unit time. River bed shear stress is an important parameter in the study of cohesive sediment, which directly determines the depth of sediment erosio...

Claims

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Application Information

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IPC IPC(8): G01M10/00
Inventor 李一平唐春燕万榆滑磊郝文彬王莹杜薇赵坤陈平王静雨邱利薛偲琦
Owner HOHAI UNIV
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