Field observation-based construction method of sediment resuspension model

A construction method, sediment technology, applied in the field of water environment observation

Inactive Publication Date: 2018-03-16
HOHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the limitations of these formulas, not only field observations but als

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  • Field observation-based construction method of sediment resuspension model
  • Field observation-based construction method of sediment resuspension model
  • Field observation-based construction method of sediment resuspension model

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Embodiment Construction

[0080] The present invention will be further described below in conjunction with the accompanying drawings.

[0081] Such as figure 1 As shown, a sediment resuspension model construction method based on field observations includes the following steps:

[0082] Step 1: Obtain observational data reflecting water body sediment and hydrodynamic characteristics and perform data preprocessing;

[0083] Step 2: Calculation of high-frequency sediment concentration data and wave characteristic parameters;

[0084] Step 3: Calculation of bottom shear stress and determination of critical shear stress;

[0085] Step 4: Determination of sedimentation velocity under different concentrations;

[0086] Step 5: Sediment resuspension flux simulation prediction model construction.

[0087] The processing process of the method of the embodiment of the present invention will be described below by taking the observation data taken from a large shallow lake as an example.

[0088] Step 1: Use A...

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Abstract

The invention discloses a field observation-based construction method of a sediment resuspension model. The method includes the main steps of: acquiring observation data reflecting water body sediments and hydrodynamic features, and carrying out data preprocessing; calculating high-frequency sediment concentration data and wave feature parameters; calculating bottom shear stress, and determining critical shear stress; determining sediment settlement speed under different concentrations; and constructing the sediment resuspension flux simulation prediction model. Mainly used instruments includemeasurement equipment measuring water body hydrodynamics and silt, and field observation and a laboratory experiment result need to be combined. According to the method, an observation process is combined, the sediment resuspension prediction model which is acquired by field data and closer to reality is established, and the defect that previously a method of systematically establishing a sediment resuspension prediction model of accurate prediction does not exist is overcome. The method of the invention is simple, is convenient to implement, and provides a basis for the scientifically and reasonably established model.

Description

technical field [0001] The invention relates to a method for constructing a sediment resuspension model based on field observation, and belongs to the technical field of water environment observation. Background technique [0002] Resuspended sediment has received more and more attention in the past few decades, and its research is very important. As an important source of endogenous pollutants, the impact of sediment resuspended on the water environment can sometimes exceed the long-term external load. Suspended solids will affect the cycle of nutrients in lakes and indirectly lead to eutrophication of water bodies. Suspended solids can also affect light attenuation, organic pollutants, and even increase the content of toxic heavy metals in water bodies. Therefore, it is necessary to understand the dynamic mechanism of sediment resuspension. [0003] The basic processes (eg, flocculation, sedimentation, erosion) of cohesive sediment resuspension have been studied by many ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 姜龙李一平翁晟琳黄冬菁杜薇魏进布旻晟许益新赖秋英罗凡
Owner HOHAI UNIV
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