Shallow water fast flow method for improving river channel water environment

Abstract

The invention provides a shallow water fast flow method for improving a river channel water environment. The method comprises the following steps: carrying out river channel hydrological survey, and evaluating whether a river channel is suitable for shallow water fast flow or not; a water diversion and drainage project is arranged at the source of the river channel through analogue simulation and engineering design so as to divert a water source; longitudinal slope transformation is carried out on the river channel through analogue simulation and engineering design so as to increase the water flow speed; setting a control and guide project at the outlet of the river channel through analogue simulation and engineering design to adjust the water level and flow of the river channel; the river channel is monitored, and water flow parameters are adjusted to treat the river channel; and the river regulation effect is regularly evaluated. The method is favorable for improving the water environment condition of the river channel and promoting the healthy development of water ecology.

Description

Technical Field

[0001] The invention relates to the field of water environment management, and in particular to a shallow water fast flow method for improving river water environment. Background Art

[0002] Influenced by traditional concepts, urban rivers are usually kept at high water levels in order to maintain water landscapes and increase water environmental capacity. However, high water level operation also has many disadvantages: high investment and high energy consumption; low reoxygenation capacity of the river channel, the bottom mud is in an anaerobic state for a long time, prone to blackening and stinking, polluting the overlying water body; low underwater light intensity, submerged plants and phytoplankton cannot grow, and it is difficult to build a complete food chain. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned related technologies, the purpose of the present invention is to provide a shallow water fast flow method for improving the river water environment, which is used to solve the problem that the bottom mud is prone to blackening and stinking due to the high water level in the river, and submerged plants and phytoplankton cannot grow.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides a shallow water fast flow method for improving the water environment of a river channel. The steps of the shallow water fast flow method for improving the water environment of a river channel include:

[0005] Conduct river hydrological surveys to assess whether the river is suitable for shallow and fast flow;

[0006] Through simulation and engineering design, water diversion projects are set up at the source of the river to divert water sources;

[0007] Through simulation and engineering design, the river channel is sloped to increase water flow velocity;

[0008] Through simulation and engineering design, control projects are set up at the river outlet to regulate the river water level and flow;

[0009] Monitor the river and adjust water flow parameters to regulate the river;

[0010] Regularly evaluate the effectiveness of river management.

[0011] Optionally, the river hydrological survey includes measuring water depth, flow velocity, water level changes, riverbed longitudinal and cross-sectional structures, and bottom type.

[0012] Optionally, the step of evaluating whether the river channel is suitable for shallow water and fast flow is: judging the inclination state of the river channel based on the longitudinal and cross-sectional structures of the riverbed, and continuing to execute subsequent steps if the river channel is inclined.

[0013] Optionally, the water diversion project includes setting up a regulating gate or a live water pumping station at the source of the river.

[0014] Optionally, the longitudinal slope modification includes modifying the river channel slope and setting up a waterfall weir, a diversion dike or an artificial waterfall along the river channel.

[0015] Optionally, the control and guidance project includes setting a control gate or a retaining wall at the river outlet.

[0016] Optionally, the step of monitoring the river is: setting up monitoring stations along the river, and the monitoring items at least include measuring the water level, flow, flow velocity and water quality of the river.

[0017] Optionally, the step of adjusting the water flow parameters is: based on the monitoring results, adjusting the flow rate and flow rate of the water flow at the source and outlet of the river through water diversion and control engineering

[0018] Optionally, the step of regularly evaluating the effect of river management is: evaluating river management based on water quality detection and biological indicator detection and optimizing and adjusting water flow parameters.

[0019] As described above, the shallow water fast flow method for improving the water environment of the river of the present invention has the following beneficial effects: first, a detailed hydrological survey in the area is conducted to evaluate whether the river is suitable for shallow water fast flow; then, appropriate engineering measures are arranged to change the water level and flow rate of the river to achieve shallow water fast flow; and subsequent monitoring and regular evaluation are performed to achieve long-term natural purification and restoration of the river. The present invention creates or maintains the state of shallow water fast flow in the river through engineering measures, which helps to improve the water environment of the river and promote the healthy development of the water ecology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram showing the flow of a shallow water fast flow method for improving the river water environment in an embodiment of the present invention.

[0021] Figure 2 Shown is a schematic diagram of a river channel after transformation in an embodiment of the present invention.

[0022] Component number description

[0023] Steps S1 to S6 10 Control gate

[0024] 20 Live water pumping station

[0025] 30 Waterfall Weir

[0026] 40 Diversion dike

[0027] 50 Retaining wall DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic view is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0030] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0031] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0032] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a shallow water fast flow method for improving the river water environment. The method is used to solve the problem that the bottom mud is prone to blackening and stinking due to the high water level in the river, and submerged plants and phytoplankton cannot grow.

[0034] Shallow water and fast flow methods to improve river water environment include:

[0035] S1. Conduct a hydrological survey of the river to assess whether the river is suitable for shallow and fast flow.

[0036] By conducting a hydrological survey of the river, data on the hydrological characteristics of the river can be collected, and the collected data can be analyzed to formulate a reasonable river management plan. Among them, the hydrological survey includes measuring water depth, flow rate, water level changes, riverbed longitudinal and cross-sectional structures, and bottom types. By investigating the water depth, a water diversion plan can be formulated according to the actual water depth. If the water depth is deep, the water depth of the river needs to be limited to keep the river shallow; if the water depth is shallow, the water depth needs to be increased; if the water level changes with the seasons, the flow of the river water needs to be adjusted according to the changes in the water level to keep the riverbed from being exposed. In this way, a reasonable plan can be formulated after understanding the water depth.

[0037] By investigating the flow rate of water, we can reasonably transform the riverbed according to the flow rate. By improving the riverbed to regulate the flow rate of water, it is beneficial to promote the circulation and renewal of water bodies.

[0038] By investigating the longitudinal and cross-sectional structure of the riverbed, we can understand the condition of the riverbed, such as whether the riverbed is inclined or flat. If the riverbed is flat and the water is not easy to flow, the river channel is not suitable for shallow water and fast flow scheme. If the riverbed is inclined, subsequent steps can be taken to transform the river channel to formulate a reasonable shallow water and fast flow scheme.

[0039] By understanding the bottom sediment type, we can learn whether the riverbed is easily eroded by water flow, carry out river ecological restoration and polluted base treatment, etc.

[0040] S2. Through simulation and engineering design, water diversion projects are set up at the source of the river to adjust the water source.

[0041] The water diversion project includes setting a control gate 10 or a live water pump station 20 at the source of the river. According to the actual situation of the river, if the water flow in the river is small and the water depth of the river needs to be increased, a live water pump station 20 can be set up to increase the water depth of the river by introducing external water sources into the river, thereby ensuring that the riverbed is not exposed; if the water flow in the river is large and the water flow in the river is deep, the water flow can be controlled by the set control gate 10, so that the river remains in a shallow water state. By setting up a water diversion project at the source of the river, the water diversion flow can be controlled, the water level of the river can be lowered, and the river can maintain a natural low water level. Among them, the control gate 10 and the live water pump station 20 are selected according to the actual use function of the river. One of the control gate 10 and the live water pump station 20 can be set, or because the river has a flood control and drainage function, the control gate 10 and the live water pump station 20 are set at the same time at the source of the river.

[0042] S3. Through simulation and engineering design, the longitudinal slope of the river channel is modified to increase the water flow velocity.

[0043] The longitudinal slope modification includes modifying the river channel slope and setting a drop weir 30, a diversion dike 40 or an artificial waterfall along the river channel. By modifying the river channel slope, the flatness of the riverbed can be changed. When the riverbed slope is greater, it is helpful to increase the flow rate of the water flow. In addition, by modifying the river channel slope, it is helpful to make the flatness of the riverbed uniform, which is helpful to ensure the continuity of the water surface along the river channel and prevent the riverbed from being exposed.

[0044] The drop weir 30 and the artificial waterfall utilize the energy of water drop to control the water flow rate. By setting a plurality of drop weirs 30 or artificial waterfalls along the river channel, not only can the water flow rate be effectively increased, but also a drop effect can be created, thereby promoting water circulation and renewal and enhancing the self-purification ability of water.

[0045] The diversion dam 40 is arranged between two waterfall weirs 30, between two artificial waterfalls or between the waterfall weir 30 and the artificial waterfall. The diversion dam 40 is used to guide the water flow so that it flows in a predetermined direction, which can improve the local water flow conditions and improve the orderliness of the water flow. The diversion dam 40 can also be used to increase the speed of the water flow and promote the circulation and renewal of the water body.

[0046] S4. Through simulation and engineering design, control projects are set up at the river outlet to regulate the water level and flow of the river.

[0047] The control engineering includes setting a control gate 10 or a retaining wall 50 at the river outlet. By setting a control gate 10 or a retaining wall 50 at the river outlet and cooperating with the control gate 10 and the live water pump station 20 at the source of the river, the water level and flow of the river can be effectively regulated, the water flow can be accurately controlled, and the stability of the river ecosystem can be maintained.

[0048] S5. Monitor the river and adjust the water flow parameters to manage the river.

[0049] Monitoring stations are set up along the river channel. By measuring the water level, flow rate, flow velocity, water quality and other information of the river channel, the management situation of the river channel can be learned, and then the water flow parameters can be adjusted according to the monitoring data. The steps of adjusting the water flow parameters are: based on the monitoring results, the flow rate and flow velocity of the water flow at the source and outlet of the river channel are adjusted through water diversion and control projects. Specifically, when the water flow rate and flow velocity in the river channel are large, the flow rate and flow velocity can be reduced by the live water pump station 20 and the regulating gate 10 at the source and outlet of the river channel. When the water flow rate in the river channel is large, the flow rate and flow velocity can be increased by the regulating gate 10 and the live water pump station 20, so that the parameters such as the water level and flow velocity of the water flow in the river channel are kept within a reasonable range. For example, in a river whose water flow is greatly affected by seasonal changes, in order to prevent the water level in the river from being too high in summer, the live water pump station 20 and the regulating gate 10 can be adjusted to lower the water level, or in order to prevent the algae from being washed away from the riverbed by the excessively fast water flow in summer, the live water pump station 20 and the regulating gate 10 can also be adjusted to reduce the flow rate. In this way, by adjusting the water flow parameters such as the flow rate, flow rate and water level in real time, the best treatment effect can be achieved.

[0050] S6. Regularly evaluate the effectiveness of river management.

[0051] Water quality testing mainly tests water quality components to understand the quality status and development trend of water bodies. Biological indicator testing mainly tests the types, quantity and activity status of microorganisms in water to evaluate the pollution status of water bodies. By regularly evaluating the flow of water in the river, the data of the water flow in the river over a period of time can be obtained. According to the data, the treatment effect can be known. Then, according to the treatment status of the river over a period of time, the live water pump station 20 and the regulating gate 10 at the source and outlet of the river are adjusted to improve the water flow parameters, thereby optimizing the treatment method. In this way, by regularly testing water quality and biological indicators, the water flow parameters can be optimized and adjusted in a timely manner, so that the river always maintains the best treatment effect.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A shallow water fast flow method for improving the water environment of a river, characterized in that: The steps of the shallow water fast flow method for improving the river water environment include: Conduct river hydrological surveys to assess whether the river is suitable for shallow and fast flow; Through simulation and engineering design, water diversion projects are set up at the source of the river to divert water sources; Through simulation and engineering design, the river channel is sloped to increase water flow velocity; Through simulation and engineering design, control projects are set up at the river outlet to regulate the river water level and flow; Monitor the river and adjust water flow parameters to regulate the river; Regularly evaluate the effectiveness of river management.

2. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The river hydrological survey includes measuring water depth, flow velocity, water level changes, riverbed longitudinal and cross-sectional structures and bottom type.

3. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The step of evaluating whether a river channel is suitable for shallow water and fast flow is: judging the inclination state of the river channel based on the longitudinal and cross-sectional structures of the riverbed, and continuing to execute subsequent steps if the river channel is in an inclined state.

4. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The water diversion project includes setting up a regulating gate or a live water pumping station at the source of the river.

5. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The longitudinal slope modification includes modifying the river channel slope and setting up waterfall weirs, diversion dikes or artificial waterfalls along the river channel.

6. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The control and guidance project includes setting a control gate or a retaining wall at the river outlet.

7. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The steps of monitoring the river are: setting up monitoring stations along the river, and the monitoring items at least include measuring the water level, flow, flow velocity and water quality of the river.

8. The shallow water fast flow method for improving the river water environment according to claim 7, characterized in that: The step of adjusting the water flow parameters is: based on the monitoring results, the flow rate and flow velocity of the water at the source and outlet of the river are adjusted through water diversion projects and control projects.

9. The shallow water fast flow method for improving the river water environment according to claim 1, characterized in that: The steps of regularly evaluating the river flow conditions are: evaluating the river management conditions based on water quality testing and biological indicator testing and optimizing and adjusting water flow parameters.

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