Purification method of urban river water quality based on hydrodynamic control and guidance system

Abstract

The invention discloses an urban river surge water quality purification method based on a hydrodynamic control and guide system. The method comprises the following steps that 1, the hydrodynamic control and guide system is built, a water gate is constructed at an outlet, communicating with an outer river, of a river, the water gate is provided with a water inlet hole and a water outlet hole, a one-way water inlet gate is arranged at the water inlet hole, a one-way water outlet gate is arranged at the water outlet hole, an isolation wall is arranged between the water inlet gate and the water outlet gate in the direction from the middle to the upstream side of the river to partition the river into two parts including a water inlet channel and a water outlet channel, and the upper end of theisolation wall protrudes out of the water surface of the river; and 2, when the outer river generates rising tide, the water inlet gate is opened, the water outlet gate is closed, when the outer rivergenerates falling tide, the water outlet gate is opened, the water inlet gate is closed, and then water always flows along the water inlet channel from the water inlet gate, bypasses the end of the isolation wall, and lastly flows in the one direction along the water outlet channel from the water outlet gate. According to the method, a water body in the river becomes flowing water to achieve fullexchange with a water body of the outer river, and therefore the water quality of the river is basically in correspondence with that of the outer river.

Description

Technical field [0001] The invention relates to the technical field of water conservancy engineering. More specifically, the present invention relates to a method for purifying urban river water quality based on a hydrodynamic control and guidance system. Background technique [0002] Rivers in coastal cities discharge rainwater from urban highlands to drainage channels outside the river. Affected by incomplete pollution interception and pollution from the first rain, the water quality in the rivers is not good. During the non-draining period, the flow of the river is not large, the water environment capacity is low, the slope along the river is small, and the water flow velocity at the outlet section is small. Affected by the tide of the outer river, the sewage in the river oscillates back and forth and stays in the river. It takes a long time and is in an anaerobic fermentation environment for a long time. In severe cases, the river water will become black and smelly, which wi...

AI Technical Summary

Problems solved by technology

[0002] Rivers in coastal cities discharge rainwater from urban highlands to the drainage channels of outer rivers. Affected by incomplete sewage interception and early rain pollution, the water quality in rivers is not good

During the non-drainage period, the flow of the river is not large, the water environment capacity is low, the gradient along the river is small, and the water flow velocity at the outlet section is small. Due to the impact of the tidal current of the outer river, the sewage in the river oscillates back and forth and stays in the river. It takes a long time and is in an anaerobic fermentation environment for a long time. In severe cases, the river water will be black and smelly, which will seriously affect the health of citizens and damage the image of the city.

In recent years, the focus of river surge management has been on pipe network renovation, sewage interception, and upgrade of sluice pumping stations. The investment in governance has been increasing, but without changing the "cecum" attribute of river surges, it is impossible to improve the water quality of river surges and outer river tidal currents. The water exchange capacity is very limited, and the water quality improvement is very limited. It is necessary to build a hydrodynamic control project on the basis of sewage interception, so that the water body in the river can become "living water" and fully exchange with the water of the outer river, so that the water quality of the river is basically the same as that of the outer river. be consistent

Images