Hyporheic exchange influence factor sensitivity analysis method based on orthogonal experimental method

A technology of sensitivity analysis and orthogonal test method, which is applied in the field of sensitivity analysis of influencing factors of subsurface exchange based on orthogonal test method, and can solve the problems of heavy workload and difficult implementation of sensitivity analysis of subsurface exchange

Active Publication Date: 2018-11-02
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a sensitivity analysis method based on the orthogonal test method for the influencing factors of subs...

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  • Hyporheic exchange influence factor sensitivity analysis method based on orthogonal experimental method
  • Hyporheic exchange influence factor sensitivity analysis method based on orthogonal experimental method
  • Hyporheic exchange influence factor sensitivity analysis method based on orthogonal experimental method

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Embodiment Construction

[0060] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] A method for sensitivity analysis of influencing factors of subsurface flow exchange based on an orthogonal test method of the present invention is specifically implemented according to the following steps:

[0062] Step 1. Based on the Reynolds average N-S equation and the k-ω turbulence model, construct a two-dimensional surface water-groundwater exchange mathematical model on the sand slope, including the two-dimensional sand pore water flow steady-state motion equation, and establish a solute transport model, in which Reynolds The average N-S equation is as follows:

[0063]

[0064]

[0065]

[0066] In the formula: ρ is fluid density; μ is dynamic viscosity; t is time; U i , u i x respectively i Time-averaged flow velocity and instantaneous flow velocity in the direction; U j , u j x respectively j Time-average flo...

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Abstract

The invention discloses a hyporheic exchange influence factor sensitivity analysis method based on orthogonal experimental method. The method specifically comprises the following steps: firstly constructing a two-dimensional sand slope upper surface water-underwater exchange mathematical model based on Reynolds average N-S equation and k-Omega turbulent model, wherein the model comprises a two-dimensional sand porosity water flow steady movement equation, and establishing a solute migration model; and then setting a boundary condition for the surface water-underwater exchange mathematical model; and finally solving the surface water-underwater exchange mathematical model by adopting the orthogonal experimental method, taking the time consumed for changing the monitoring domain point soluteconcentration to the balance as an evaluation index of the sensitivity analysis, thereby analyzing the surface water-underwater exchange mathematical model and solute movement model parameter sensitivity. The problem that the prior art is large in hyporheic exchange sensitivity analysis workload and difficult to implement is avoided.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a sensitivity analysis method for influencing factors of subsurface flow exchange based on an orthogonal test method. Background technique [0002] There is a water-saturated sediment layer with two-way migration of matter and energy between the surface water and the groundwater of the river, which is called the river underflow zone, which affects the exchange of water and solute between the surface water and the groundwater. Subsurface exchange is the interaction of solutes, moisture, colloids, particles, etc. between the overlying water body and the sediment layer on the river bed. Studies have shown that subsurface exchange can cause the retention of solutes in the river bed, and can also affect the migration of solutes in the river. It plays an important role in buffering pollution, accelerating the cycle of nutrients, protecting groundwater ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 任杰陈波王秀平杨杰张文兵
Owner XIAN UNIV OF TECH
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