A numerical simulation method for a water resource clear guiding and dispatching water body replacement effect

Abstract

The invention discloses a numerical simulation method for a water replacement effect of a water resource guiding and clearing dispatcher, which comprises the following steps: 1) selecting and defininga water replacement rate for representing the water replacement effect on the basis of a guiding and clearing dispatcher according to a new-to-old basic principle; 2) expressing the water body concentration by selecting the mass percentage concentration, and establishing the equivalent relationship between the water body concentration and the water body replacement rate through reasonable assumption and simplification; 3) establishing a hydromechanics basic equation including a continuous equation, a motion equation and a convection diffusion equation; 4) analyzing the characteristics of theriver network district where the region of interest of the diversion scheduling is located, determining the modeling range and dimension of the mathematical model, building a hydrodynamic force and convective diffusion coupling mathematical model, and setting the initial concentration and boundary concentration of a convective diffusion module; and 5) operating and calculating the mathematical model of hydrodynamic force and convection diffusion coupling, and analyzing and researching water body replacement conditions at different time and different positions in the region.

Description

technical field [0001] The invention relates to the technical field of hydraulics, in particular to a method for numerically simulating the replacement effect of water bodies for diversion and regulation of water resources. Background technique [0002] The diversion and regulation of water resources is to use the tidal power of the open sea and clean water sources, through the regulation of hydraulic structures such as pump gates, to make the water bodies of the main rivers in the river network flow in a directional and orderly manner, so as to speed up the renewal of water bodies and improve the water quality of inland rivers. The method of improving the water quality of inland rivers through diversion and regulation of water resources has been adopted by many regions in China since Shanghai created a precedent in the mid-1980s, and it has become an important means to improve the water environment carrying capacity of the existing river network. In the work of diversion an...

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Problems solved by technology

In the work of diversion and clearing of water resources, the effect of water quality improvement has always been the focus of attention of all parties. At present, it is mainly analyzed and studied by means of water quality mathematical model simulation or on-site water quality monitoring. However, these methods require a lot of water quality basic data and work. Therefore, it is necessary to propose a simpler and easier research method to meet the needs of actual work.

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