Application of 1D and 2D Coupled Hydrodynamics and Water Quality Model in the Controlled River of Sluice

Abstract

In order to study the hydrodynamic characteristics and pollutant transport law of the sluice-controlled reach, MIKE software was used to establish a hydrodynamic and water quality mathematical model which was coupled with the two-dimensional model of the backwater area of Fenhe river second dam and the one-dimensional model of the upstream and downstream of the backwater area and the Xiaohe river reach. On the premise that the water level of the second dam of Fenhe river can be controlled normally, the hydrodynamic characteristics and COD concentration migration and change rules of the sluice controlled reach are simulated under four scenarios of the ecological base flow and typical flood process of Fenhe river, and the normal operation and abnormal discharge of sewage plants A and B separately. The calculation results show that: The increase of river flow is conducive to the rapid discharge of pollutants from the backwater area; With the increase of river flow, the pollution range is also different; With the ecological base flowing, the pollutants move down slowly in a cluster; In typical floods, pollutants move down the river bank in bands. The research results are valuable for the prediction and control of pollutants in the backwater area of the second dam of Fenhe river.

Keywords

• 1d and 2d coupling model
• sluice
• sewage plant
• cod
• fenhe river