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A Mesoscale Test Method for Determination of Salt Diffusion Coefficient of Sediment in Dredging Filling Area

A technology of diffusion coefficient and measurement method, applied in the environmental field, can solve the problems such as the method for determining the scale has not been reported yet, and there is no unified standard for the diffusion coefficient of sediment in the reclamation area, so as to achieve continuous undisturbed long-term monitoring and simple post-processing. , prepare a simple effect

Active Publication Date: 2021-04-06
HOHAI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] At present, there is no uniform standard for determining the salt diffusion coefficient of sediment in the reclamation area, and the method for determining the mesoscale in the field has not been reported yet.

Method used

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  • A Mesoscale Test Method for Determination of Salt Diffusion Coefficient of Sediment in Dredging Filling Area
  • A Mesoscale Test Method for Determination of Salt Diffusion Coefficient of Sediment in Dredging Filling Area
  • A Mesoscale Test Method for Determination of Salt Diffusion Coefficient of Sediment in Dredging Filling Area

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Embodiment

[0059] A mesoscale test method for measuring the salt diffusion coefficient of sediment in dredging reclamation area, the specific operation is as follows:

[0060] (1) The bottom mud of three groups of dredging reclamation areas was collected on site and placed in the test device. The thickness of the bottom mud is 40cm. The main body of the test device is a plastic bucket with a height of 2m and an inner diameter of 1.2m. It can be seen that figure 1 ;

[0061] (2) the bottom mud is paved and left standstill for 24 hours, and the conductivity of the bottom mud surface, the middle part and the bottom is tested and its salt content is respectively 6g / L, 6.5g / L and 7g / L;

[0062] (3) Configure 5 tons of water body with a salt content of 1g / L, and pour the water body into the bucket along the wall of the cylinder. The thickness of the water body in the three groups of test devices is 40cm, 80cm and 120cm respectively. It can be seen that Figure 1-Figure 3 ;

[0063] (4) Build...

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Abstract

The invention discloses a mesoscale test method for determining the salt diffusion coefficient of bottom mud in a dredging reclamation area, which belongs to the field of environmental technology. Several groups of bottom mud with the same thickness and test platforms for salt release from bottom mud at different water levels are built; The sensor is placed in the bottom mud, and the water body conductivity sensor is placed in the middle of the bottom mud-water interface and the water body. Using the calibrated correlation curve between the conductivity and salt content of the soil and water body in the research area, the monitored conductivity data is converted For the salinity, use GMS software to build a numerical model corresponding to the test platform, and obtain the molecular diffusion coefficient of salt release from mesoscale sediment and the molecular diffusion coefficient of salt in water by fitting the salinity-time series data . The present invention comprehensively builds a mesoscale test platform for the salt diffusion coefficient of mesoscale sediment and corresponding numerical models, monitors the release and migration of salt in sediment and water in real time, and obtains the salt in sediment and water through numerical model fitting Diffusion coefficient, high precision.

Description

technical field [0001] The invention belongs to the field of environmental technology, and in particular relates to a mesoscale test method for determining the salt diffusion coefficient of bottom mud in a dredging reclamation area. Background technique [0002] In order to expand the space for urban development and increase land resources, the reclamation of coastal areas has become an important technical means to solve the contradiction between my country's economic development and land resources. [0003] Both the fill soil and the natural mud surface in the reclamation area are areas with high salt content, and the release of salt in the reclamation area has an important impact on the surface water environment, groundwater environment and foundation stability of the reclamation area. The salt diffusion coefficient in the sediment of the dredger reclamation area is an important parameter for the study of the release law and flux of the sediment from the dredger reclamatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 陈舟王锦国周志芳窦智李伟健卓越
Owner HOHAI UNIV
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