Ecological dam with integrated fishway and construction method thereof

Abstract

The present invention provides an ecological dam with integrated fishway and a construction method thereof. The ecological dam with integrated fishway comprises: a plurality of pool chambers (2) connected end to end, and adjacent pool chambers (2) are connected through fish holes (3); wherein the plurality of pool chambers (2) connected end to end are distributed in a stepped manner along the interception direction of the ecological dam to conduct upstream water with downstream water. The ecological dam with integrated fishway of the present invention adopts an integrated integrated design, integrates the stepped fishway with the ecological dam, optimizes the layout of the water retaining dam, greatly saves the area occupied by the ecological dam and the fishway, and has a good landscape effect.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water conservancy and hydropower, and in particular to an ecological dam with integrated fishway and a construction method thereof. Background Art

[0002] River damming is an important engineering means of river management and an important technical measure for water resource development and utilization, flood prevention and disaster reduction. It has multiple functions such as flood prevention and security, water supply and irrigation, and water landscape. As the requirements for the protection of water ecological environment and biodiversity become higher and higher, river damming needs to consider fish migration. Generally, technical means such as fishways, fish lifts, and reproduction and release are used to solve the problem of fish crossing the dam from downstream to upstream or migrating from upstream to downstream.

[0003] However, the effect of technologies such as fish lifts is limited. Currently, fishways, especially bionic fishways, are mostly used, but they generally require a large investment. For small and medium-sized weirs and dams, there is an urgent need for a small and medium-sized weir and dam with integrated fishways that requires little investment, occupies less space, and has better effects to solve the problem of fish migration between upstream and downstream. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the existing technical problems, the present disclosure provides an ecological dam with integrated fishway and a construction method thereof, which are used to at least partially solve the above technical problems.

[0006] (II) Technical solution

[0007] The present disclosure provides an ecological dam with an integrated fishway, comprising: a plurality of pool chambers 2 connected end to end, wherein adjacent pool chambers 2 are connected via fish holes 3; wherein the plurality of pool chambers 2 connected end to end are distributed in a stepped manner along the interception direction of the ecological dam to conduct upstream water with downstream water.

[0008] Optionally, the cross section of the pool chamber 2 is any one of a circle, a partial circle, a quadrilateral or a triangle, and a combination thereof.

[0009] Optionally, the ecological dam with integrated fishway also includes: a water retaining dam body 1 and a dam body foundation 6; wherein the water retaining dam body 1 includes at least one fish hole 3 to connect the upstream water with the pool chamber 2, and a plurality of pool chambers 2 connected end to end are located above the dam body foundation 6.

[0010] Optionally, the ecological dam with integrated fishway further comprises: a side wall 4 ; wherein the side wall 4 is perpendicular to the dam body 1 , and a plurality of pool chambers 2 connected end to end are turned in a stepped direction at the intersection with the side wall 4 .

[0011] Optionally, the pool chamber 2 includes a pool chamber wall 5 , the fish hole 3 is located in the pool chamber wall 5 , and the height of the fish hole 3 in the pool chamber wall 5 is negatively correlated with the height difference of the adjacent pool chamber 2 .

[0012] Optionally, the material of the pool chamber 2 is any one of pebbles, stone strips, concrete or mortar masonry, and a combination thereof.

[0013] On the other hand, the present disclosure provides a method for building an ecological dam with an integrated fishway, comprising: constructing a plurality of pool chambers 2 connected end to end, wherein the plurality of pool chambers 2 connected end to end are distributed in a stepped manner along the interception direction of the ecological dam; constructing fish holes 3 between adjacent pool chambers 2 to conduct upstream water with downstream water, thereby completing the construction of the ecological dam.

[0014] Optionally, the method for constructing an ecological dam with integrated fishway also includes: constructing a dam body 1 and a dam foundation 6; constructing a fish hole 3 on the dam body 1 to connect the pool chamber 2; and constructing a plurality of pool chambers 2 connected end to end on the dam foundation 6.

[0015] Optionally, constructing the water retaining dam body 1 and the dam body foundation 6 includes: calculating the size of the pool chamber 2, the number of steps, and the height difference between adjacent pool chambers 2 according to the upstream and downstream head difference and the adaptive flow velocity of the river fish population; calculating the downstream length of the ecological dam according to the size, number of steps and height difference of the pool chamber 2; building the first basic platform of the ecological dam according to the downstream length; building the water retaining dam body 1 on the upstream side of the first basic platform; building a second basic platform for each pool chamber 2 along the water retaining dam body 1 on the first basic platform according to the size, number of steps and height difference of the pool chamber 2 to obtain the dam body foundation 6.

[0016] Optionally, constructing the water retaining dam body 1 and the dam body foundation 6 further comprises: calculating the height of the water retaining dam body 1 according to the flood control standard and the interception width; and calculating the height of the dam body foundation 6 according to the flood control standard and the upstream water flow.

[0017] (III) Beneficial effects

[0018] The present invention provides an ecological dam with integrated fishway, including a series of pool chambers with a certain drop and interconnected to form a "fish ladder" for fish migration. In each level of the pool chamber, except for the high water flow rate at the fish hole, the water flow in the remaining water area is relatively gentle, which can provide a good resting place for fish. In addition, the pool chamber is located on the foundation of the dam body and integrated with the ecological dam, with high space utilization, and the material for building the ecological dam can be natural stone, which is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0020] Figure 1 A top view of an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown;

[0021] Figure 2Schematically shows a front view of an eco-dam with integrated fishway according to an embodiment of the present disclosure;

[0022] Figure 3 A side view of an eco-dam with integrated fishway according to an embodiment of the present disclosure is schematically shown;

[0023] Figure 4 A flow chart of a method for constructing an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown.

[0024] [Description of Reference Numerals]

[0025] 1- Dam body

[0026] 2-pool room

[0027] 3-Fishing hole

[0028] 4-Side wall

[0029] 5-Pool room wall

[0030] 6-Dam foundation DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers. The technical features in the various embodiments exemplified in the specification can be freely combined to form a new solution without conflict. In addition, each claim can be used as an embodiment alone or the technical features in each claim can be combined as a new embodiment. In the drawings, the shape or thickness of the embodiment can be expanded and simplified or conveniently indicated. Furthermore, the elements or implementations not shown or described in the drawings are in a form known to a person of ordinary skill in the art. In addition, although demonstrations of parameters containing specific values ​​may be provided herein, it should be understood that the parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint.

[0033] Unless there are technical obstacles or contradictions, the above-mentioned various embodiments of the present disclosure can be freely combined to form additional embodiments, and these additional embodiments are all within the protection scope of the present disclosure.

[0034] Although the present disclosure is described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred embodiments of the present disclosure and should not be construed as limiting the present disclosure. The dimensional ratios in the accompanying drawings are merely illustrative and should not be construed as limiting the present disclosure.

[0035] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0036] Figure 1 A top view of an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown.

[0037] Figure 2 A front view of an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown.

[0038] Figure 3 A side view of an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown.

[0039] According to the embodiments of the present disclosure, Figure 1 , Figure 2 and Figure 3 As shown, the ecological dam with integrated fishway includes, for example, a water retaining dam body 1, a plurality of pool chambers 2 connected end to end, a side wall 4 and a dam body foundation 6, and adjacent pool chambers 2 are connected through fish holes 3; wherein, the pool chamber 2 includes, for example, a pool chamber wall 5, and a plurality of pool chambers 2 connected end to end are distributed in a stepped manner along the interception direction of the ecological dam to conduct upstream water with downstream water. The dam body foundation 6 is located below the entire water retaining dam body 1 and the pool chamber 2, and the upstream water retaining dam body 1 is integrated with the pool chamber 2 to form an ecological dam body. The water flow velocity in the pool chamber 2 is slow, and is used to connect the upper and lower fish holes 3, which are respectively located on one side of the water retaining dam body 1 and one side of the pool chamber 2, and are used to connect each pool chamber 2, and then connect the upstream and downstream rivers. The side wall 4 is, for example, set parallel to the river and constructed on the dam foundation 6. It can be constructed with local and ecological building materials such as pebbles and stone strips, and can also be constructed with traditional concrete, mortar masonry and other building materials. The pool wall 5 is the wall for constructing the pool 2, and the building materials can be selected with reference to the dam body. The interception direction refers to the masonry direction required for the ecological dam to intercept the water flow, which is generally perpendicular to the water flow direction. In this embodiment, for example, it is the direction of the dam body 1, that is, multiple pool chambers 2 are distributed in a stepped manner along the dam body 1. For example, continuous pool chambers with the same direction can be named as a layer, and each layer includes multiple levels of pool chambers. Figure 1 As shown, in this embodiment, there are, for example, 4 layers of pool chambers, each layer of pool chambers contains 4 or 5 levels of pool chambers. The ecological dam disclosed in the present invention adopts an integrated design, which greatly reduces the area occupied by rivers, lakes and river banks, and ensures the water retaining effect of the ecological dam while also ensuring the rest and migration of fish in the fishway.

[0040] It is understandable that the number of layers of the pool chambers and the number of levels of each layer are related to the size of the pool chambers, the height difference between adjacent pool chambers, the width of the interception, the height of the ecological dam, and the length of the ecological dam along the water flow direction. The present disclosure does not limit the number of layers of the pool chamber 2 and the number of levels of each layer.

[0041] According to the embodiments of the present disclosure, the pool chamber 2 is, for example, enclosed by the pool chamber wall 5 and the dam body 1, or enclosed by the pool chamber wall 5 and other pool chamber walls 5 and the foundation platforms of the pool chambers 2 at various levels, or enclosed by the pool chamber wall 5 and other pool chamber walls 5, the foundation platforms of the pool chambers 2 at various levels and the wall 4, etc. The cross-sectional shape of the pool chamber 2 can be, for example, any one of the shapes of a semicircle or a partial circle, a quadrilateral or a triangle, and a combination thereof.

[0042] Preferably, the shape of the pool chamber 2 is as follows Figure 1 The semicircular and partially circular shapes (similar to petal shapes) shown in the figure fully combine the function and aesthetic requirements of the pool chamber 2. The ecological dam disclosed in the present invention adopts the method of stacking circular pools and grading masonry, innovatively integrating the ecological dam, fishway and water landscape, optimizing the layout of the weir, which is both beautiful and practical and economical.

[0043] According to the embodiment of the present disclosure, the height of the fish hole 3 in the chamber wall 5 is negatively correlated with the height difference of the adjacent chamber 2. When the height difference of the adjacent chamber 2 is large, the height of the fish hole 3 in the chamber wall 5 is low, that is, the fish hole 3 is close to the bottom of the chamber 2. When the height difference of the adjacent chamber 2 is small, the height of the fish hole 3 in the chamber wall 5 is high, that is, the fish hole 3 is close to the top of the chamber 2. A reasonable height of the fish hole 3 provides good conditions for fish to cross the dam.

[0044] According to the embodiment of the present disclosure, during the operation of the ecological dam with integrated fishway of the present disclosure, most of the water flows directly to the first-layer pool chamber 2, for example, by overflowing the dam, and the other part of the water flows to the uppermost pool chamber 2 through the fish holes 3 in the water retaining dam body 1. The pool chamber wall 5 reduces the impact of the overflowing water flow, and even in the flood season, the flow rate in the pool chamber 2 can be relatively slow, providing a channel for fish to rest and cross the dam.

[0045] Figure 4 A flow chart of a method for constructing an ecological dam with integrated fishway according to an embodiment of the present disclosure is schematically shown.

[0046] Another aspect of the present disclosure provides a method for constructing an ecological dam with an integrated fishway, such as Figure 4 As shown, for example, including:

[0047] S110, constructing the water retaining dam body 1 and the dam body foundation 6.

[0048] S120, constructing a plurality of pool chambers 2 connected end to end on the dam body foundation 6, wherein the plurality of pool chambers 2 connected end to end are distributed in a stepped manner along the interception direction of the ecological dam.

[0049] S130, constructing a fish hole 3 on the dam body 1 to connect the pool chamber 2.

[0050] According to the embodiment of the present disclosure, the size of the fish hole 3 is mainly determined by the flow rate range required for the fish to cross the dam. According to the adaptive flow rate of the fish community, the size of the fish hole 3 is calculated by the flow through the pool chamber 2 to ensure that the fish have the ability to cross the step pool chamber 2 step by step from the downstream river channel and go upstream through the ecological dam body to the upper reaches of the river.

[0051] S140, constructing fish holes 3 between adjacent pool chambers 2 to conduct upstream water with downstream water, thereby completing the construction of the ecological dam.

[0052] According to an embodiment of the present disclosure, for example, the water retaining dam body 1 and the dam body foundation 6 are constructed through steps S111 to S115.

[0053] S111, calculating the size of the pool chamber 2, the number of steps, and the height difference between adjacent pool chambers 2 according to the upstream and downstream water head difference and the adaptive flow velocity of the river fish population.

[0054] According to the embodiments of the present disclosure, the radius and number of rows of the stepped pool chambers 2 are calculated based on the upstream and downstream head difference and the adaptive flow rate of the river fish population. The step elevation difference h of adjacent pool chambers 2 is determined by the upstream and downstream water level difference, the river width, the pool chamber radius, and the number of pool chamber rows. The width or diameter of the pool chamber is determined based on the river width, the upstream and downstream head difference, and the required flow rate in the pool chamber 2. The height of the pool chamber 2 is generally greater than 20 cm, and is determined comprehensively based on the number of pool chamber rows, cost requirements, etc. The thickness of the pool chamber 2 is determined based on the water pressure of the pool chamber 2, the material, etc., through structural calculations.

[0055] S112, calculating the downstream length of the ecological dam according to the size of the pool chamber 2, the number of steps and the height difference.

[0056] S113, build the first basic platform of the ecological dam according to the downstream length.

[0057] According to the embodiment of the present disclosure, during implementation, the foundation of the ecological dam is first excavated according to the length and width of the ecological dam and the requirements of the working surface, and then the first basic platform is constructed according to the calculated length, width and height of the first basic platform.

[0058] S114, constructing a water retaining dam body 1 on the upstream side of the first foundation platform.

[0059] According to the embodiments of the present disclosure, for example, according to the river flood control standard, the design flood results of the river at the corresponding standard dam site section are calculated. According to the river width, the overall width B of the upstream water retaining dam and the ecological dam is determined. According to the river design flood results, the flood control standard and the determined width, the height H of the upstream water retaining dam body 1 is calculated, and then the dam crest water depth and the design flood level are calculated.

[0060] S115 , according to the size, number of steps and height difference of the pool chamber 2 , a second foundation platform for each pool chamber 2 is constructed along the dam body 1 on the first foundation platform to obtain the dam body foundation 6 .

[0061] According to the embodiment of the present disclosure, the dam foundation 6 is set on the treated riverbed, and its size needs to be structurally calculated to ensure that it can bear the weight of the ecological dam body and the water body, and the structural stability under the pressure transmitted by the dam body at the corresponding flood level. The width of the dam foundation 6 perpendicular to the river direction is basically equal to the river width, the height is determined according to the flood control standard and the upstream water flow, and the length along the river direction is determined according to the upstream and downstream head difference, the size and number of the pool chambers 2.

[0062] According to an embodiment of the present disclosure, the ecological dam construction method of the present disclosure with integrated fishway also includes, for example, constructing a side wall 4 on the dam body foundation 6. The height of the side wall 4 is generally the same as the height of the same row of pool chambers 2, and can also be the same as the height of the upstream water retaining dam body 1. The thickness of the side wall 4 is determined by structural calculation based on the soil pressure, water pressure, etc.

[0063] According to the embodiments of the present disclosure, the retaining dam body 1, side walls 4, dam foundation 6 and pool chamber wall 5 can be constructed preferably with local and ecological building materials such as pebbles and stone strips, or with traditional concrete, mortar masonry and other building materials, thereby reducing the construction cost of the ecological dam.

[0064] The application effect of the ecological dam with integrated fishway disclosed in the present invention is explained below through two specific embodiments.

[0065] Example 1

[0066] An ecological dam according to an embodiment of the present disclosure is built on a certain river. The hydrological conditions of the river are, for example, a width of about 20 meters and a water flow of about 20 cubic meters per second. After the ecological dam is built, the water level difference between the upstream and downstream is, for example, 1.5 meters. For example, a first-level semicircular pool chamber 2 is built. Through calculation, it is obtained that the diameter of the pool chamber 2 is, for example, 4 meters, the number of layers is 3, and the height difference between adjacent pool chambers 2 is, for example, 10 centimeters. According to the adaptive flow rate of the fish population in the river, the size of the fish hole 3 is calculated to be, for example, 50 centimeters. Based on the above data, combined with flood control standards, construction costs and other factors, the height and length along the river of the entire ecological dam are determined.

[0067] Example 2

[0068] An ecological dam according to an embodiment of the present disclosure is built at a certain lake mouth (where it meets a river). The hydrological conditions at the lake mouth are, for example, a width of about 50 meters and a water flow of about 100 cubic meters per second. After the ecological dam is built, the water level difference between the upstream and downstream is, for example, 3 meters. For example, a first-level square pool chamber 2 is built. Through calculation, the length and width of the pool chamber 2 are obtained to be, for example, 5 meters and 5 meters, the number of layers is 3, and the height difference between adjacent pool chambers 2 is, for example, 10 centimeters. According to the adaptive flow rate of the fish population in the lake, the size of the fish hole 3 is calculated to be, for example, 100 centimeters. Based on the above data, combined with flood control standards, construction costs and other factors, the height and downstream length of the entire ecological dam are determined.

[0069] In summary, the disclosed embodiments propose an ecological dam with integrated fishway and a construction method thereof. The ecological dam with integrated fishway is constructed with local materials such as pebbles in the river channel, and has functions such as water retaining and fish passing. The ecological dam can raise the water level to take water and form a landscape water surface. At the same time, fish can swim from upstream to downstream by climbing over the dam body, stepped pool chambers or fish passing holes, or swim from downstream to upstream through stepped pool chambers or fish passing holes. The flow rate in the pool chamber is relatively low, which can provide rest for fish. The ecological dam with integrated fishway adopts an integrated integrated design, innovatively integrating the stepped fishway with the ecological dam, optimizing the layout of the water retaining dam, and greatly saving the floor space of the ecological dam and the fishway, while having a good landscape effect.

[0070] The details not included in the method embodiment section are similar to those in the device embodiment section. Please refer to the device embodiment section and will not be repeated here.

[0071] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to a specific order or hierarchy.

[0072] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. In addition, the shapes, sizes, and positional relationships of the components in the drawings do not reflect the actual sizes, proportions, and actual positional relationships.

[0073] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the attached claims, the disclosure is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the attached claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the disclosure.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. With respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained in terms of "including," used as a transitional word in the claims. Any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0075] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. An ecological dam with integrated fishway, characterized in that: include: A plurality of pool chambers (2) connected end to end, wherein adjacent pool chambers (2) are connected via fish holes (3); A water retaining dam body (1); Side walls (4); Dam foundation (6); The plurality of end-to-end connected pool chambers (2) are distributed in a stepped manner along the interception direction of the ecological dam to conduct upstream water to downstream water; The side wall (4) is perpendicular to the water retaining dam body (1), and the plurality of pool chambers (2) connected end to end are turned in a stepped direction at the intersection with the side wall (4); The pool chamber (2) comprises a pool chamber wall (5), the fish hole (3) is located in the pool chamber wall (5), and the height of the fish hole (3) in the pool chamber wall (5) is negatively correlated with the height difference of the adjacent pool chamber (2); The water retaining dam body (1) comprises at least one fish hole (3) so that the upstream water is connected to the pool chamber (2), and the multiple pool chambers (2) connected end to end are located on the dam body foundation (6).

2. The ecological dam with integrated fishway according to claim 1, characterized in that: The cross section of the pool chamber (2) is any one of a circle, a partial circle, a quadrilateral or a triangle, and a combination thereof.

3. The ecological dam with integrated fishway according to claim 1, characterized in that: The material of the pool chamber (2) is any one of pebbles, stone strips, concrete or mortared stone, or a combination thereof.

4. A method for constructing an ecological dam with integrated fishway according to any one of claims 1 to 3, comprising: Constructing a plurality of end-to-end connected pool chambers (2), wherein the plurality of end-to-end connected pool chambers (2) are distributed in a stepped manner along the interception direction of the ecological dam; A fish hole (3) is constructed between adjacent pool chambers (2) to conduct upstream water and downstream water, thereby completing the construction of an ecological dam; Constructing a water retaining dam body (1) and a dam body foundation (6); A side wall (4) is constructed on the dam foundation (6).

5. The method for constructing an ecological dam with integrated fishway according to claim 4, further comprising: The fish hole (3) is constructed on the water retaining dam body (1) to communicate with the pool chamber (2); The plurality of pool chambers (2) connected end to end are constructed on the dam body foundation (6).

6. According to the method for constructing an ecological dam with integrated fishway as claimed in claim 4, the construction of the water retaining dam body (1) and the dam body foundation (6) comprises: Calculate the size of the pool chamber (2), the number of steps, and the height difference between adjacent pool chambers (2) based on the upstream and downstream head difference and the adaptive flow velocity of the river fish population; Calculating the downstream length of the ecological dam according to the size of the pool chamber (2), the number of steps and the height difference; Constructing the first foundation platform of the ecological dam according to the downstream length; Building the water retaining dam body (1) on the upstream side of the first foundation platform; According to the size of the pool chamber (2), the number of steps and the height difference, a second foundation platform for each pool chamber (2) is constructed on the first foundation platform along the water retaining dam body (1) to obtain the dam body foundation (6).

7. According to the method for constructing an ecological dam with integrated fishway as claimed in claim 4, the construction of the water retaining dam body (1) and the dam body foundation (6) further comprises: Calculating the height of the water retaining dam body (1) according to the flood control standard and the cut-off width; The height of the dam foundation (6) is calculated according to flood control standards and upstream water flow.

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