Optimal construction method and device for fish passage facilities based on multi-dimensional impact assessment

Abstract

The present invention provides a method and device for optimizing the construction of fish-passing facilities based on multi-dimensional impact assessment, including obtaining the distribution range of target fish, the movement path and movement direction corresponding to key life history events, identifying dam data in the distribution range of target fish, obtaining a first dam sequence without fish-passing facilities based on the dam data, obtaining a first mitigation effect after each dam is equipped with fish-passing facilities, obtaining a second dam sequence without fish-passing facilities on the movement path corresponding to the key life history event and obtaining a second mitigation effect after each dam is equipped with fish-passing facilities based on the movement direction corresponding to the key life history event, obtaining an evaluation index after weighted summation of the first mitigation effect and the second mitigation effect corresponding to each dam, and selecting the dam with the highest score to construct fish-passing facilities according to the evaluation index. The present invention can accurately obtain evaluation results based on key life history events to guide the optimization construction of fish-passing facilities.

Description

Technical Field

[0001] The invention relates to the fields of water conservancy engineering and ecological environment protection, and in particular to a method and device for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment. Background Art

[0002] Modern dams have played a vital role in promoting the progress of human civilization, with benefits such as power generation, irrigation, flood control and shipping. However, hydropower development has had a variety of adverse effects on the survival and reproduction of freshwater migratory fish. For example, dam construction will block or partially block the migration path of fish, making it impossible or difficult for them to complete important stages of their life history, thus causing their resources to shrink or even extinct.

[0003] In the past two decades, as one of the measures to alleviate the impact of fish migration barriers, fish passage facilities have been widely built, but compared with the number of hydropower dams, the number of fish passage facilities is still relatively small. Under the urgent need to restore fish resources, identifying the dams that are most severe in fish isolation and building upstream or downstream fish passage facilities has become a research focus in the field of aquatic ecological protection.

[0004] At present, the identification of the most severe dams is mainly based on the degree of obstruction of the dams to the free movement of freshwater fish. For example, the tree connectivity index widely used internationally selects the most severe dams according to the differences in the degree of obstruction of different dams to the free movement of freshwater fish, and then constructs fish-passing facilities at this location. However, this index only considers the impact of dams on the free movement of freshwater fish, and ignores the impact on other key life history events. For example, as a key life history event, spawning plays an important role in the replenishment of fish resources. Dam obstruction will prevent fish from reaching the spawning grounds, thereby causing a decline in fish resources. For example, for fish that lay drifting eggs, the eggs need to drift a sufficient distance to hatch. The obstruction of the drift of fish eggs by dams will cause the death of fish eggs, which will lead to the ineffective replenishment of fish resources. In summary, the lack of analysis of spawning migration barriers and egg drift barriers will lead to a lack of effective guidance for the construction of fish-passing facilities. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and device for optimizing the construction of fish passing facilities based on multidimensional impact assessment, systematically assess the impact of dams on multidimensional key life history events of fish, and guide the optimized construction of fish passing facilities based on the comprehensive results obtained from the impact of multidimensional key life history events of fish.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment includes the following steps:

[0008] Determine whether the key life history events of target fish in the basin are upstream spawning migration or downstream spawning migration, and obtain the distribution range of target fish, the movement path and movement direction corresponding to the key life history events;

[0009] Identify dam data in the distribution range and movement paths of target fish;

[0010] Based on the dam data, a first dam sequence without upstream fish passage facilities and / or downstream fish passage facilities is obtained, and a first mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passage facilities and / or downstream fish passage facilities are added to each dam in the first dam sequence is obtained;

[0011] Obtain a second dam sequence without upstream fish passage facilities and / or downstream fish passage facilities on the movement path corresponding to the key life history event, and obtain the second mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passage facilities and / or downstream fish passage facilities are added to each dam in the second dam sequence based on the movement direction;

[0012] The weighted sum of the first mitigation effect and the second mitigation effect corresponding to each dam is obtained to obtain the evaluation index for each dam to add upstream fish passage facilities and / or downstream fish passage facilities, and the dam is selected to build upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

[0013] Furthermore, for target fish, the distribution range is an area surrounded by one or more water flow starting points and one or more water flow confluence points.

[0014] Furthermore, the method for respectively obtaining the first mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passing facilities and / or the downstream fish passing facilities are added to each dam in the first dam sequence is as follows:

[0015] Obtaining a first connectivity value based on the species of the target fish;

[0016] Obtaining a second connectivity value after adding an upstream fish passing facility and / or a downstream fish passing facility;

[0017] The first mitigation effect after adding upstream fish-passing facilities and / or downstream fish-passing facilities is obtained according to the difference between the second connectivity value and the first connectivity value.

[0018] Furthermore, the method for obtaining the first connectivity value based on the target fish species is:

[0019] Determine whether the target fish species is freshwater migratory or seawater migratory;

[0020] When the target fish species is freshwater migratory, the calculation formula for the first connectivity value is:

[0021] (1)

[0022] in, is the first connectivity value for the free movement of fish; and River sections and Length, is the number of river sections; is the total river reach length; It is a river section and The number of obstacles between and No. The value of the passability of the obstacle in the upward and downward directions;

[0023] When the target fish species is Haihe migratory type, the calculation formula of the first connectivity value is:

[0024] (2).

[0025] Furthermore, the method for obtaining the second mitigation effect of the blocking effect on the free movement of target fish after adding upward fish passing facilities and / or downward fish passing facilities to each dam in the second dam sequence based on the movement direction is as follows:

[0026] It is determined whether the movement direction of the target fish and the fish eggs of the target fish is upward or downward, and the second relief effect includes an upward relief effect and / or a downward relief effect.

[0027] Furthermore, the key life history event is the upward migration over the dam for spawning, and the second relief effect includes an upward relief effect and a downward relief effect. For dams that have not constructed upward fish-passing facilities on the movement path corresponding to the key life history event, the construction of upward fish-passing facilities can produce an upward relief effect on the upward movement of the target fish; for dams that have not constructed downward fish-passing facilities on the movement path corresponding to the key life history event, the construction of downward fish-passing facilities can produce a downward relief effect on the downward movement of the eggs of the target fish.

[0028] Furthermore, the key life history event is the downstream spawning migration over the dam, and the second mitigation effect includes a downstream mitigation effect. For dams that have not constructed downstream fish passing facilities on the movement path corresponding to the key life history event, the construction of downstream fish passing facilities can produce a downward mitigation effect on both the downward movement of the target fish and the downward movement of the target fish's eggs.

[0029] The optimized construction device of fish passage facilities based on multi-dimensional impact assessment includes:

[0030] The first acquisition module is used to determine whether the key life history event of the target fish in the basin is upstream spawning migration or downstream spawning migration, and obtain the distribution range of the target fish, the movement path and movement direction corresponding to the key life history event;

[0031] Dam data acquisition module, used to identify the distribution range of target fish and dam data in the movement path;

[0032] The second acquisition module is used to acquire, based on the dam data, a first dam sequence without upstream fish passing facilities and / or downstream fish passing facilities, and respectively acquire a first mitigation effect of the blocking effect on the free movement of target fish after each dam in the first dam sequence is equipped with upstream fish passing facilities and / or downstream fish passing facilities;

[0033] The third acquisition module is used to obtain a second dam sequence without upstream fish passing facilities and / or downstream fish passing facilities on the movement path corresponding to the key life history event, and obtain the second mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the second dam sequence based on the movement direction;

[0034] The evaluation module is used to obtain the evaluation index of each dam for adding upstream fish passage facilities and / or downstream fish passage facilities by weighted summing up the first mitigation effect and the second mitigation effect corresponding to each dam, and select the dam to build upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

[0035] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the above-mentioned method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment is implemented.

[0036] A non-transitory computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment.

[0037] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0038] The method for optimizing the construction of fish-passing facilities based on multidimensional impact assessment provided by the present invention overcomes the limitation of only considering the impact of free movement of fish in the prior art by systematically evaluating the multiple impacts of dams on the distribution range and key life history events of target fish, and provides a more comprehensive and accurate barrier assessment index. This method significantly improves the scientificity and effectiveness of the construction of fish-passing facilities, ensures that resources can be optimally allocated, and maximizes the ecological benefits of the construction of fish-passing facilities. By weighting and summing the first mitigation effect and the second mitigation effect corresponding to each dam to obtain an evaluation index, the present invention can accurately determine the location of the dam where fish-passing facilities need to be built first, thereby promoting the spawning and hatching process of migratory fish, restoring fish resources and maintaining population stability. The present invention is applicable to different types of migratory fish, has strong adaptability and broad application prospects, improves the protection level of aquatic ecosystems, provides a scientific basis for the sustainable utilization of fish resources, and achieves a win-win situation for ecological protection and economic development. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 It is a flow chart of the method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment of the present invention;

[0041] Figure 2 It is a schematic diagram of the multi-dimensional barrier of the dam to the target fish of the present invention;

[0042] Figure 3 It is a schematic diagram of a device for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment of the present invention. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] Example 1

[0046] Example 1 provides a method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment, such as Figure 1 and Figure 2 As shown, the following steps are included:

[0047] Step S1: Determine whether the key life history event of the target fish 3 in the watershed is upstream spawning migration or downstream spawning migration, and obtain the distribution range of the target fish 3, the movement path and movement direction corresponding to the key life history event;

[0048] Step S2: Identify the distribution range of the target fish 3 and the dam data in the movement path;

[0049] Step S3: based on the dam data, a first dam sequence without upstream fish passing facilities and / or downstream fish passing facilities is obtained, and a first mitigation effect of the blocking effect on the free movement of the target fish 3 after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the first dam sequence is obtained;

[0050] Step S4: obtaining a second dam sequence without upstream fish passing facilities and / or downstream fish passing facilities on the movement path corresponding to the key life history event, and obtaining a second mitigation effect of the blocking effect on the free movement of the target fish 3 after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the second dam sequence based on the movement direction;

[0051] Step S5: weighted sum of the first mitigation effect and the second mitigation effect corresponding to each dam to obtain an evaluation index for each dam to add upstream fish passage facilities and / or downstream fish passage facilities, and select a dam to construct upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

[0052] The method for optimizing the construction of fish-passing facilities based on multi-dimensional impact assessment provided in this embodiment overcomes the limitation of only considering the impact of free movement of fish in the prior art by systematically evaluating the multiple impacts of dams on the distribution range and key life history events of target fish 3, and provides a more comprehensive and accurate barrier assessment index. This method significantly improves the scientificity and effectiveness of the construction of fish-passing facilities, ensures that resources can be optimally allocated, and maximizes the ecological benefits of building fish-passing facilities. By weighting and summing the first mitigation effect and the second mitigation effect corresponding to each dam to obtain an evaluation index, the present invention can accurately determine the location of the dam where fish-passing facilities need to be built first, thereby promoting the spawning and hatching process of migratory fish, restoring fish resources and maintaining population stability. The present invention is applicable to different types of migratory fish, has strong adaptability and broad application prospects, improves the protection level of aquatic ecosystems, provides a scientific basis for the sustainable utilization of fish resources, and achieves a win-win situation for ecological protection and economic development.

[0053] In step S1 of this embodiment, for the target fish 3, the distribution range is an area surrounded by one or more water flow starting points and one or more water flow confluence points.

[0054] In step S2 of this embodiment, the dam data includes dams that have been built, are under construction, and are planned to be built.

[0055] In step S3 of this embodiment, the method for respectively obtaining the first mitigation effect of the blocking effect on the free movement of the target fish 3 after the upstream fish passing facilities and / or the downstream fish passing facilities are added to each dam in the first dam sequence is:

[0056] Step S301: obtaining a first connectivity value based on the type of target fish 3;

[0057] Step S302: obtaining a second connectivity value after adding an upstream fish passing facility and / or a downstream fish passing facility;

[0058] Step S303: obtaining a first mitigation effect after adding an upstream fish-passing facility and / or a downstream fish-passing facility according to a difference between the second connectivity value and the first connectivity value.

[0059] In step S301 of this embodiment, the method for obtaining the first connectivity value based on the three target fish species is:

[0060] Determine whether the target fish 3 is a freshwater migratory fish or a seawater migratory fish;

[0061] When the three target fish species are freshwater migratory, the calculation formula for the first connectivity value is:

[0062] (1)

[0063] in, is the first connectivity value of the free movement of fish, ranging from 0 to 100, and the larger the value, the less obstruction to the free movement of fish; and River sections and Length, is the number of river sections; is the total length of the river section, whose length is determined according to the distribution range of the target fish 3; It is a river section and The number of obstacles between and No. The value of the passability of the obstacle in the upward and downward directions;

[0064] When the three target fish species are Haihe migratory species, the calculation formula for the first connectivity value is:

[0065] (2).

[0066] The method for obtaining the second mitigation effect of the blocking effect on the free movement of target fish 3 after adding fish passing facilities to each dam in the second dam sequence is:

[0067] In step S302 of this embodiment, the second connectivity value of the additional upstream fish passing facility is The second connectivity value after adding downstream fish passing facilities is .

[0068] In step S303 of this embodiment, the calculation formula for obtaining the first mitigation effect of adding upstream fish passing facilities according to the difference between the second connectivity value and the first connectivity value is:

[0069] (3).

[0070] The calculation formula for obtaining the first mitigation effect of adding downstream fish passage facilities according to the difference between the second connectivity value and the first connectivity value is:

[0071] (4).

[0072] In step S4 of this embodiment, the method for respectively obtaining the second mitigation effect of the blocking effect on the free movement of the target fish 3 after the upward fish passing facilities and / or downward fish passing facilities are added to each dam in the second dam sequence based on the movement direction is:

[0073] It is determined whether the movement direction of the target fish 3 and the fish eggs of the target fish 3 is upward or downward, and the second relief effect includes an upward relief effect and / or a downward relief effect.

[0074] Specifically, when the key life history event is the upward spawning migration across the dam, the target fish 3 moves upward and the eggs of the target fish 3 move downward, then the second relief effect includes an upward relief effect and a downward relief effect. For dams that do not have upward fish-passing facilities on the movement path corresponding to the key life history event, the construction of upward fish-passing facilities can produce an upward relief effect on the upward movement of the target fish 3; for dams that do not have downward fish-passing facilities on the movement path corresponding to the key life history event, the construction of downward fish-passing facilities can produce a downward relief effect on the downward movement of the eggs of the target fish 3.

[0075] When the key life history event is the downstream spawning migration over the dam, the second mitigation effect includes the downstream mitigation effect, the downward movement of the target fish 3, and the downward movement of the eggs of the target fish 3. The upward fish passing facilities do not produce the upward mitigation effect, so the second mitigation effect does not include the upward mitigation effect; for the dam where the downstream fish passing facilities are not built on the movement path corresponding to the key life history event, the construction of the downstream fish passing facilities can produce a downward mitigation effect on both the downward movement of the target fish 3 and the downward movement of the eggs of the target fish 3.

[0076] In step S5 of this embodiment, the method of selecting the optimal dam to construct the fish passing facility after weighted summing of the first mitigation effect and the second mitigation effect corresponding to each dam is:

[0077] If the key life history event of target fish 3 is upstream spawning migration:

[0078] (5)

[0079] (6)

[0080] In the formula, and They are the scoring indexes for the construction of upstream fish passage facilities and downstream fish passage facilities, respectively. The higher the scoring index, the higher the dam score, indicating that the effect of building upstream fish passage facilities and / or downstream fish passage facilities on the dam is greater. , refers to the weight coefficient, and its value can be determined based on expert experience. The upward relief effect corresponding to the upward movement of the target fish 3, The downward relief effect corresponding to the downward movement of the eggs of the target fish 3.

[0081] If the key life history event of target fish 3 is upstream spawning migration:

[0082] (7)

[0083] (8)

[0084] in, The downward relief effect corresponding to the downward movement of the target fish 3.

[0085] Based on the scoring index, the location of the dam where one upstream fish passage facility and one downstream fish passage facility are optimized is determined according to the score. When N dams (N>1) need to be optimized, repeat the above steps until N dams are reached.

[0086] The following will be combined with a specific embodiment of the present invention to clearly and completely describe the method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment provided in Example 1 of the present invention.

[0087] The present invention provides a method and device for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment, such as Figure 2 As shown, the data includes: water flow starting point 1; water flow starting point 2; target fish 3; dam 4; upstream fish passing facility 5; spawning ground 6; water outlet 7. Note: The migration of target fish 3 from water flow starting point 1 or water flow starting point 2 to water outlet 7 is called downstream migration, and crossing the dam during downstream migration is called downstream dam crossing, and the downstream fish passing facility assists the target fish 3 to cross the dam downstream. The migration of target fish 3 from water outlet 7 to water flow starting point 1 or water flow starting point 2 is called upstream migration, and crossing the dam during upstream migration is called upstream dam crossing, and the upstream fish passing facility assists the target fish 3 to cross the dam upstream.

[0088] This specific embodiment includes the following steps:

[0089] Step S1: Determine the key life history events of the target fish 3 in the watershed, and obtain the distribution range of the target fish 3, and the movement path and movement direction corresponding to the key life history events.

[0090] In this specific embodiment, the distribution range of the target fish 3 is the area surrounded by the water flow starting point 1, the water flow starting point 2 and the water outlet 7, the spawning migration path is from the water outlet 7 to the spawning ground 6, and the fish egg hatching drift path is from the spawning ground 6 to the water outlet 7. Note: In this specific embodiment, the target fish 3 is a fish that lays drifting eggs. For fish that lay non-drifting eggs, the fish egg hatching drift path is not considered. In addition, in this embodiment, the spawning migration direction of the target fish 3 is the upward direction over the dam. In other embodiments, the spawning migration direction of the fish may also appear in the downward direction over the dam.

[0091] Step S2: Identify the data of built, under-construction and planned dams in the distribution range and movement path of the target fish 3.

[0092] In this specific embodiment, 9 dams are built within the distribution range of the target fish 3, and the dam IDs are A~I. For example, dam 4 is one of the dams, with ID B, on which an upstream fish-passing facility 5 is built. Among the 9 dams, upstream fish-passing facilities are built on dams B, C, E, F, and G, while upstream fish-passing facilities are not built on dams A, D, H, and I, and downstream fish-passing facilities are not built on all dams. Note: In this specific embodiment, no new dams will be built within the distribution range of the target fish 3 in the future. This method is also applicable to other embodiments in which new dams are built within the distribution range. In addition, in this specific embodiment, only upstream fish-passing facilities are built for the 9 dams. This method is also applicable to other embodiments in which downstream fish-passing facilities are built.

[0093] Step S3: Based on the dam data, a first dam sequence without upstream fish passage facilities and / or downstream fish passage facilities is obtained, and a first mitigation effect of the blocking effect on the free movement of target fish 3 after the upstream fish passage facilities and / or downstream fish passage facilities are added to each dam in the first dam sequence is obtained.

[0094] In this specific embodiment, the target fish 3 is a freshwater migratory fish, and the first connectivity value is calculated using formula (1): Note: This method is also applicable to other embodiments in which the target fish 3 is a sea or river migratory fish.

[0095] Preferably, in this embodiment and The values ​​are shown in Table 1.

[0096] Table 1 Passability score table for upward and downward dam crossings

[0097]

[0098] In this embodiment, the first connectivity value The calculation result is: .

[0099] Based on step S302, for the dam without upstream fish passage facilities, a second connectivity value after the upstream fish passage facilities are added is obtained. Based on step S303, according to formula (3), a first mitigation effect after the upstream fish passage facilities are added is obtained according to the difference between the second connectivity value and the first connectivity value.

[0100] Based on step S302, for the dam without downstream fish passage facilities, a second connectivity value after the downstream fish passage facilities are added is obtained. Based on step S303, according to formula (4), a first mitigation effect after the downstream fish passage facilities are added is obtained according to the difference between the second connectivity value and the first connectivity value.

[0101] Among the 9 dams in this specific embodiment, upward fish passing facilities are built on dams B, C, E, F, and G, while upward fish passing facilities are not built on dams A, D, H, and I. One upward fish passing facility is built on dams D, H, A, and I, respectively, and the corresponding first relief effects are 5.4, 1.4, 0.4, and 0.1. None of the 9 dams in this embodiment have downward fish passing facilities, and one downward fish passing facility is built on dams C, F, G, D, E, B, H, and A, and the corresponding first relief effects are 5.1, 5.1, 3.1, 2.3, 2.2, 1.9, 0.6, and 0.2.

[0102] In step S4, in this specific embodiment, the target fish 3 is an upward dam-passing spawning migratory fish, so the target fish 3 moves upward, and the eggs of the target fish 3 move downward. For dams without upward fish-passing facilities on the movement path corresponding to the key life history events, the second relief effect is the upward relief effect, and the upward movement of the target fish 3 corresponds to the upward relief effect; for dams without downward fish-passing facilities on the movement path corresponding to the key life history events, the second relief effect is the downward relief effect, and the downward movement of the eggs of the target fish 3 corresponds to the downward relief effect.

[0103] In step S5, the location of additional fish passage facilities is evaluated according to formulas (5) and (6).

[0104] Based on the dam construction data on the spawning migration route, the dam sequence without upstream or downstream fish passing facilities on the route is listed according to the direction of fish passing the dam. The spawning migration direction of the target fish 3 in this embodiment is upstream passing the dam. There are four dams I, H, G, and F on its spawning migration route. Only G and F dams have upstream fish passing facilities, so the sequence of unbuilt dams is {I, H}.

[0105] For fish that lay drifting eggs, based on the dam construction data on the egg hatching and drifting path, a sequence of dams without downstream fish passing facilities on the path is included. In this specific embodiment, four dams I, H, G, and F are built on the egg hatching and drifting path, none of which have downstream fish passing facilities. The sequence of dams without downstream fish passing facilities on the path is {I, H, G, F}.

[0106] In this specific embodiment, as for adding one more upstream fish passing facility, since it has already been built on the B, C, E, F, and G dams, only the A, D, H, and I dams are considered for addition.

[0107] First, according to the first mitigation effect calculated in step S3 ,make , that is, .

[0108] Then, according to step S4, The sequence is {I, H}, let , that is, .

[0109] Finally, according to formula (5), we get , as shown in Table 2. The highest score is 5.4, so for the construction of an additional upstream fish passage facility, the optimal construction plan is to build it on Dam D.

[0110] Table 2 Scoring table for optimizing the construction of an additional uplink facility

[0111]

[0112] In this example, one downstream fish passage facility is to be added. Since it is not built on all dams, the additional facility is to be built on one of the dams.

[0113] First, according to the calculated first mitigation effect ,make , you can get .

[0114] Subsequently, because the target fish 3 spawns by swimming upstream over the dam, no downstream fish passage facilities are considered. .

[0115] Afterwards, obtain ,make , you can get .

[0116] Finally, according to formula (6), we get , as shown in Table 3. The highest score is 7.1, so the optimal construction plan for adding a downstream fish passage facility is to build it on Dam F.

[0117] Table 3 Scoring table for optimizing construction of an additional downlink facility

[0118]

[0119] In this embodiment, if one additional upstream and downstream fish-passing facility is to be added, it is recommended to build them on dam D and dam F respectively. If it is necessary to build upstream and downstream fish-passing facilities on all dams, repeat the above steps, and the order of the optimal construction of upstream fish-passing facilities on the dams is: D, H, I, A, and the order of the optimal construction of downstream fish-passing facilities on the dams is: F, D, G, C, H, I, E, B, A.

[0120] Example 2

[0121] Embodiment 2 provides a device for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment, such as Figure 3 As shown, including:

[0122] The first acquisition module is used to determine whether the key life history event of the target fish 3 in the watershed is an upstream spawning migration or a downstream spawning migration, obtain the distribution range of the target fish 3, the movement path and movement direction corresponding to the key life history event, and select the direction of constructing the fish passing facility as an upstream and / or downstream direction based on the movement direction;

[0123] A dam data acquisition module is used to identify the distribution range of the target fish 3 and the dam data in the movement path;

[0124] The second acquisition module is used to acquire, based on the dam data, a first dam sequence without upstream fish passing facilities and / or downstream fish passing facilities, and to acquire a first mitigation effect of the blocking effect on the free movement of the target fish 3 after each dam in the first dam sequence is equipped with upstream fish passing facilities and / or downstream fish passing facilities;

[0125] The third acquisition module is used to obtain a second dam sequence without upstream fish passing facilities and / or downstream fish passing facilities on the movement path corresponding to the key life history event, and obtain a second mitigation effect of the blocking effect on the free movement of the target fish 3 after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the second dam sequence based on the movement direction;

[0126] The evaluation module is used to obtain an evaluation index by weighted summing of the first mitigation effect and the second mitigation effect corresponding to each dam, and to select the dam to construct upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

[0127] Example 3

[0128] Embodiment 3 provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the above-mentioned method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment is implemented.

[0129] Example 4

[0130] Embodiment 4 provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the above-mentioned method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment is implemented.

[0131] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment, characterized in that: The following steps are involved: Determine whether the key life history events of target fish in the basin are upstream spawning migration or downstream spawning migration, and obtain the distribution range of target fish, the movement path and movement direction corresponding to the key life history events; Identify dam data in the distribution range and movement paths of target fish; Based on the dam data, the first dam sequence without upstream fish passage facilities and / or downstream fish passage facilities is obtained, and the first mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passage facilities and / or downstream fish passage facilities are added to each dam in the first dam sequence is obtained, and the method is: The first connectivity value is obtained based on the target fish species by: Determine whether the target fish species is freshwater migratory or seawater migratory; When the target fish species is freshwater migratory, the calculation formula for the first connectivity value is: （1） in, is the first connectivity value for the free movement of fish; and River sections and Length, is the number of river sections; is the total river reach length; It is a river section and The number of obstacles between and No. The value of the passability of the obstacle in the upward and downward directions; When the target fish species is Haihe migratory type, the calculation formula of the first connectivity value is: （2）； Obtaining a second connectivity value after adding an upstream fish passing facility and / or a downstream fish passing facility; Obtaining a first mitigation effect after adding an upstream fish passing facility and / or a downstream fish passing facility according to a difference between the second connectivity value and the first connectivity value; The second dam sequence without upstream fish passing facilities and / or downstream fish passing facilities on the movement path corresponding to the key life history event is obtained, and the second mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the second dam sequence based on the movement direction is obtained, the method is: It is determined whether the movement direction of the target fish and the target fish eggs is upward or downward, and the second mitigation effect includes an upward mitigation effect and / or a downward mitigation effect, specifically: The key life history event is the upward migration over the dam for spawning. The second mitigation effect includes an upward mitigation effect and a downward mitigation effect. For dams without upward fish-passing facilities on the movement path corresponding to the key life history event, the construction of upward fish-passing facilities can produce an upward mitigation effect on the upward movement of the target fish; for dams without downward fish-passing facilities on the movement path corresponding to the key life history event, the construction of downward fish-passing facilities can produce a downward mitigation effect on the downward movement of the eggs of the target fish; The weighted sum of the first mitigation effect and the second mitigation effect corresponding to each dam is obtained to obtain the evaluation index for each dam to add upstream fish passage facilities and / or downstream fish passage facilities, and the dam is selected to build upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

2. The method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment according to claim 1, characterized in that: For target fish species, the distribution range is the area surrounded by one or more water flow starting points and one or more water flow confluence points.

3. The method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment according to claim 1, characterized in that: The key life history event is the downstream spawning migration over the dam. The second mitigation effect includes the downstream mitigation effect. For dams without downstream fish passing facilities on the movement path corresponding to the key life history event, the construction of downstream fish passing facilities can produce a downward mitigation effect on both the downward movement of the target fish and the downward movement of the target fish's eggs.

4. A device for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment, applied to the method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment as described in any one of claims 1 to 3, characterized in that: include: The first acquisition module is used to determine whether the key life history event of the target fish in the basin is upstream spawning migration or downstream spawning migration, and obtain the distribution range of the target fish, the movement path and movement direction corresponding to the key life history event; Dam data acquisition module, used to identify the distribution range of target fish and dam data in the movement path; The second acquisition module is used to acquire, based on the dam data, a first dam sequence without upstream fish passing facilities and / or downstream fish passing facilities, and respectively acquire a first mitigation effect of the blocking effect on the free movement of target fish after each dam in the first dam sequence is equipped with upstream fish passing facilities and / or downstream fish passing facilities; The third acquisition module is used to obtain a second dam sequence without upstream fish passing facilities and / or downstream fish passing facilities on the movement path corresponding to the key life history event, and obtain the second mitigation effect of the blocking effect on the free movement of target fish after the upstream fish passing facilities and / or downstream fish passing facilities are added to each dam in the second dam sequence based on the movement direction; The evaluation module is used to obtain the evaluation index of each dam for adding upstream fish passage facilities and / or downstream fish passage facilities by weighted summing up the first mitigation effect and the second mitigation effect corresponding to each dam, and select the dam to build upstream fish passage facilities and / or downstream fish passage facilities based on the evaluation index.

5. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment as described in any one of claims 1 to 3 is implemented.

6. A non-transitory computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the method for optimizing the construction of fish passage facilities based on multi-dimensional impact assessment as described in any one of claims 1 to 3 above is implemented.

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