CN113504386B - River ecological flow rate determination method, device and storage medium - Google Patents
River ecological flow rate determination method, device and storage medium Download PDFInfo
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- CN113504386B CN113504386B CN202011313191.9A CN202011313191A CN113504386B CN 113504386 B CN113504386 B CN 113504386B CN 202011313191 A CN202011313191 A CN 202011313191A CN 113504386 B CN113504386 B CN 113504386B
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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Abstract
The embodiment of the invention provides a method, equipment and a storage medium for determining river ecological flow velocity, wherein the method comprises the following steps: obtaining key river reach information of each area in a preset area range; aiming at each region, dividing the key river reach into stations of corresponding types according to the river basin area information and the terrain information in the key river reach information; determining an initial value of ecological flow velocity and a background value of ecological flow velocity of each key river reach in each station; determining an ecological flow velocity target value of each key river section according to the ecological flow velocity initial value and the ecological flow velocity background value; and determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach. The method can effectively and quickly determine the ecological flow velocity of the river in the sensitive period in a wider range, thereby efficiently guiding a user to adjust the ecological flow velocity of the river to guarantee the survival demand of fishes and improving the efficiency of adjusting the ecological flow velocity of the river.
Description
Technical Field
The embodiment of the invention relates to the technical field of data processing, in particular to a method, equipment and a storage medium for determining river ecological flow rate.
Background
The river ecological sensitive period refers to the key life stage of the key protection objects of the river and the flood area thereof, the key protection objects mainly comprise fish habitat, valley forests, river wetlands and the like, and the river reach with the fish habitat protection function is most widely distributed.
Among many hydrologic factors, the flow rate is a key influence factor throughout different life stages of the fish, so the establishment of the ecological flow rate in the sensitive period of the river is the basis for guaranteeing the habitat of the fish. Due to the differences in dominant species, climatic conditions and terrain, the ecological flow rate targets vary from region to region and from river to river of different scale. The ecological flow rate threshold target of the zoning classification is made to have important significance for maintaining important life stages such as fish migration, spawning and hatching and river ecological flow management.
In the prior art, the research of mechanism experiments is focused, the ecological flow rate of a single river or typical fishes is focused, the method for establishing the ecological flow rate of the river in the sensitive period of the river basin scale is not considered enough, and a method for determining the threshold value of the ecological flow rate of the river in the sensitive period, which can be popularized to a wider range, is lacked. Therefore, the ecological flow rate of the river in the sensitive period in a wider range cannot be effectively and quickly determined, so that users cannot be efficiently guided to adjust the ecological flow rate of the river to guarantee the survival demand of fishes, and the efficiency of adjusting the ecological flow rate of the river is low.
Disclosure of Invention
The embodiment of the invention provides a method, equipment and a storage medium for determining river ecological flow velocity, which solve the technical problems that in the prior art, the method for determining river sensitive period ecological flow velocity of river basin scale is not considered enough, a method for determining river sensitive period ecological flow velocity threshold value capable of being popularized nationwide is lacked, and the ecological flow velocity of river sensitive period nationwide cannot be evaluated, so that users cannot be guided to adjust the river ecological flow velocity to guarantee the survival demand of fishes and maintain the stability of the habitat of the fishes.
In a first aspect, an embodiment of the present invention provides a river ecological flow rate determination method, including:
obtaining key river reach information of each area in a preset area range;
aiming at each region, dividing the key river reach into stations of corresponding types according to the river basin area information and the terrain information in the key river reach information;
determining an initial value of ecological flow velocity and a background value of ecological flow velocity of each key river reach in each station;
determining an ecological flow speed target value of each key river section according to the ecological flow speed initial value and the ecological flow speed background value;
and determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach.
Optionally, the method for dividing the important river reach into the stations of the corresponding types according to the drainage basin area information and the topographic information in each important river reach information includes:
determining the sites divided by each key river reach as big sites or small sites according to the river basin area information in each key river reach information;
and determining the sites divided by the key river reach as mountain sites or plain sites according to the topographic information in the key river reach information.
Optionally, in the method described above, the determining, according to the watershed area information in each piece of key river reach information, that a station into which each piece of key river reach information is divided is a large station or a small station includes:
comparing the river basin area in each key river reach information with a preset area threshold;
if the river basin area in the information of a certain key river reach is larger than a preset area threshold, determining that the station divided by the key river reach is a large station;
and if the river basin area in the information of a certain key river reach is smaller than or equal to a preset area threshold value, determining the sites divided by the key river reach as the small sites.
Optionally, in the method as described above, the determining an initial value of the ecological flow rate of each key river reach in each site includes:
obtaining migration stimulation flow velocity of each key river section in each station;
determining typical fishes and river reach types of key river reaches in each site;
if the typical fish is determined to be fish producing drifting eggs, acquiring the safe drifting flow rate of the fish eggs;
if the river reach type is determined to be a main stream river reach, acquiring spawning stimulation flow rate;
and determining an initial ecological flow rate value according to the migration stimulation flow rate, or determining the initial ecological flow rate value according to the migration stimulation flow rate and the safe drifting flow rate and/or spawning stimulation flow rate of the fish eggs.
Optionally, the determining the ecological flow rate background value of each important river reach in each site by the method described above includes:
obtaining the spawn incubation time of typical fishes in each key river reach;
and determining the background value of the ecological flow rate according to the incubation time of the fish eggs.
Optionally, the determining the ecological flow rate target value of each important river reach according to the ecological flow rate initial value and the ecological flow rate background value, in the method described above, includes:
comparing the initial value of the ecological flow velocity with the background value of the ecological flow velocity;
and determining the maximum value of the initial value of the ecological flow velocity and the background value of the ecological flow velocity as the target value of the ecological flow velocity of the corresponding key river reach.
Optionally, the determining, by the method as described above, an ecological flow rate threshold of the corresponding site according to the ecological flow rate target value of each important river segment includes:
sequencing the ecological flow rate target values of the key river reach in each station from large to small;
and determining the ecological flow rate target value of the key river reach sequenced at the preset percentage position as the ecological flow rate threshold value of the site.
Optionally, in the method as described above, after determining the ecological flow rate threshold of the corresponding site according to the ecological flow rate target value of each important river reach, the method further includes:
determining target river reach adjustment data in corresponding sites according to the ecological flow rate threshold corresponding to each site;
and sending the target river reach adjustment data to a user terminal so that a user adjusts the ecological flow rate of the target river reach by adopting a preset adjustment strategy according to the target river reach adjustment data displayed in the user terminal.
In a second aspect, an embodiment of the present invention provides a river ecological flow rate determination device, including:
a memory, a processor, and a transceiver;
the processor, the memory and the transceiver are interconnected through a circuit;
the memory stores computer-executable instructions; the transceiver is used for sending target river reach adjusting data to the user terminal;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the river ecology flow rate determination method according to any one of the first aspect.
In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the river ecological flow rate determination method according to any one of the first aspect.
The embodiment of the invention provides a method, equipment and a storage medium for determining river ecological flow speed, which are characterized in that important river reach information of each area in a preset area range is obtained; aiming at each region, dividing the key river reach into stations of corresponding types according to the river basin area information and the terrain information in the key river reach information; determining an initial value of ecological flow velocity and a background value of ecological flow velocity of each key river reach in each station; determining an ecological flow speed target value of each key river section according to the ecological flow speed initial value and the ecological flow speed background value; and determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach. The method can effectively and quickly determine the ecological flow velocity of the river in the sensitive period in a wider range, thereby efficiently guiding a user to adjust the ecological flow velocity of the river to guarantee the survival demand of fishes and improving the efficiency of adjusting the ecological flow velocity of the river.
It should be understood that what is described in the summary above is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart of a river ecological flow rate determination method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a river ecological flow rate determination method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a river ecological flow rate determining apparatus according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For a clear understanding of the technical solutions of the present application, a detailed description of the prior art solutions will be given first.
In the prior art, the ecological flow rate of a specific river is generally determined by adopting an indoor experimental method. However, the ecological flow rate of a single river cannot be applied to all rivers nationwide, and thus, a standard for the ecological flow rate of a river cannot be provided to guide a user to adjust the ecological flow rate of the river.
Therefore, in the prior art, aiming at a specific river, the ecological flow rate of the river is determined by adopting an indoor experiment method, and a river ecological flow rate standard cannot be provided to guide a user to adjust the river ecological flow rate. The inventor finds in research that the characteristic that rivers in the same region and under the same terrain condition have similar river channels can be utilized to divide the rivers in regions in the whole country, and the target river ecological flow rate of each station in each region is respectively determined, so that a user can take corresponding measures to the river reach corresponding to the station according to the target river ecological flow rate to adjust the river ecological flow rate, the stability of a river ecological system is maintained, and the fish habitat is protected.
Embodiments of the present invention are described below in detail with reference to the accompanying drawings
Example one
Fig. 1 is a flowchart of a river ecological flow rate determining method according to an embodiment of the present invention, and as shown in fig. 1, an execution subject of the embodiment is a river ecological flow rate determining device. The river ecological flow rate determination method provided by the embodiment comprises the following steps.
Step 101, obtaining important river reach information of each area in a preset area range.
Specifically, in this embodiment, partitioning is performed within a preset area range according to a preset area water resource partition, a fish partition, a terrain and a climate condition, and important river reach information of each area is obtained from a preset area germplasm resource protection area distribution chart.
The important river section can also be an important section for some small rivers, and because the changes of the ecological environments of the river channels of the small rivers and the nearby river channels are small, the river information of one section can be selected to replace the river information of the whole river. The key river reach information may include river basin area information, terrain information, typical fish information, and other information, which is not limited in this embodiment.
It can be understood that when the key river reach information of each area is obtained from the germplasm resource protection area distribution chart of the preset area, the key river reach information of each area may also be obtained through other channels, which is not limited in this embodiment.
The preset area range may be, for example, a country. Each region may be divided into several parts for the country.
And 102, aiming at each region, dividing the important river reach into stations of corresponding types according to the river basin area information and the terrain information in the important river reach information.
Specifically, in this embodiment, after the preset area range is partitioned and the key river reach information of each area is obtained, the key river reach inside each partition is divided into a large station and a small station according to the river reach area information in each key river reach information, and the key river reach inside each partition is divided into a mountain river reach and a plain river reach according to the terrain information in each key river reach information.
When the key river reach in each partition is divided into a large station and a small station according to the river basin area information in the key river reach information, the key river reach can also be divided into a large station, a medium station and a small station according to the river basin area information, which is not limited in this embodiment.
And 103, determining an initial value of the ecological flow velocity and a background value of the ecological flow velocity of each key river reach in each site.
Specifically, in this embodiment, after the partitions are divided according to the watershed area information and the terrain information, the stages of migration, spawning, incubation, etc. of the fishes are important life stages of the fishes, and the flow velocity is a key influence factor passing through different life stages of the fishes. When the water flow speed reaches migration stimulation flow speed V1, the fishes can only arrive at a place suitable for spawning through migration; for the drifting fish eggs, when the water flow speed reaches the safe drifting flow speed V2 of the fish eggs, the fish eggs can float or suspend on the water surface, and then can be successfully hatched; for some fish, the fish can lay eggs only when the water flow rate reaches the spawning stimulation flow rate V3. Therefore, the initial ecological flow velocity value of each key river section needs to be determined according to the magnitude relation among the migration stimulation flow velocity V1, the safe fish egg drifting flow velocity V2 and the spawning stimulation flow velocity V3.
In this embodiment, the ecological flow velocity background value of each key river reach can be determined according to the target flow reaching standard.
The migration stimulation flow velocity V1 can be determined according to analysis of biological characteristics of typical fishes of key river sections in each area. Aiming at fishes producing drifting eggs, the safe drifting flow speed V2 of the eggs needs to be determined by combining the floating flow speed requirements of the eggs, and for some fishes producing viscous or sinking eggs, the safe drifting flow speed V2 of the eggs does not need to be considered. For important spawning river segments such as the major river main stream, the spawning stimulation flow rate V3 needs to be determined by combining the spawning stimulation demands of main spawning fishes, and for non-major river main stream river segments, the spawning stimulation flow rate V3 does not need to be considered.
And step 104, determining the ecological flow rate target value of each key river section according to the ecological flow rate initial value and the ecological flow rate background value.
The ecological flow velocity target value represents the flow velocity target of each key river reach, the ecological flow velocity initial value represents the minimum flow velocity value required by fish migration, spawning and incubation, and the ecological flow velocity background value represents the flow velocity value corresponding to the minimum standard-reaching flow in the spawning period.
Optionally, in this embodiment, when determining the ecological flow rate target value of each key river reach, the normal reproduction and propagation requirements of the fish can be met by meeting not only the flow rate value corresponding to the minimum standard flow rate in the spawning period, but also the minimum flow rate value required for migration, spawning, and hatching of the fish. Therefore, the ecological flow velocity target value of each key river section needs to be determined according to the ecological flow velocity initial value and the ecological flow velocity background value.
And 105, determining an ecological flow rate threshold value of the corresponding station according to the ecological flow rate target value of each key river reach.
Specifically, in this embodiment, according to the ecological flow rate target value of each key river reach, the ecological flow rate of the river reach exceeding the preset percentage is taken as a standard, and the ecological flow rate threshold of the corresponding site is determined.
The preset percentage may be 75%, or may also be another value, which is not limited in this embodiment.
In the method for determining the ecological flow rate of the river provided by the embodiment, the key river reach information of each area in the preset area range is obtained; aiming at each region, dividing the key river reach into stations of corresponding types according to the river reach area information and the terrain information in the key river reach information; determining an initial value of ecological flow velocity and a background value of ecological flow velocity of each key river reach in each station; determining an ecological flow velocity target value of each key river section according to the ecological flow velocity initial value and the ecological flow velocity background value; and determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach. The ecological flow velocity initial value of each key river section is determined by combining the fish migration stimulated flow velocity, the fish egg safe drifting flow velocity and the spawning stimulated flow velocity, the ecological flow velocity target value is determined according to the ecological flow velocity initial value and the ecological flow velocity background value, the ecological flow velocity threshold value of the corresponding station is determined according to the statistical result of the ecological flow velocity target value of each river section, the ecological flow velocity of the river in the sensitive period in the preset area range can be effectively and quickly determined, corresponding measures are taken for the river with the determination result not reaching the standard, and the river ecological flow velocity is efficiently adjusted to the target ecological flow velocity.
Example two
Fig. 2 is a flowchart of a river ecological flow rate determining method according to a second embodiment of the present invention, and as shown in fig. 2, the river ecological flow rate determining method according to the second embodiment of the present invention is further refined in steps 101 to 105 on the basis of the river ecological flow rate determining method according to the first embodiment of the river ecological flow rate determining method according to the present invention, and further includes a step of determining an ecological flow rate threshold value of a corresponding site according to an ecological flow rate target value of each important river reach, determining target river reach adjustment data in the corresponding site according to the ecological flow rate threshold value corresponding to each site, and sending the target river reach adjustment data to a user terminal, so that a user adjusts the ecological flow rate of the target river reach according to the target river reach adjustment data displayed in the user terminal by using a preset adjustment strategy. The river ecological flow rate determination method provided by the embodiment comprises the following steps.
Step 201, obtaining important river reach information of each area in a preset area range.
Optionally, in this embodiment, partitioning is performed within a preset area range according to a preset area water resource partition, a fish partition, and terrain and climate conditions; aiming at each subarea, comparing the natural monthly flow and the actually measured monthly flow of each river reach in the dry season, and selecting the river reach with less human activity interference as a key river reach by taking the relative error as the standard of not more than 5 percent; and obtaining the key river reach information of each region from a distribution chart of the germplasm resource protection region of the preset region.
In the river low water period, the river water is taken by agricultural irrigation water and reservoir water in a large amount, so that the river flow is changed greatly, and the natural monthly flow and the actually measured monthly flow of each river reach in the low water period are compared, so that the degree of the interference of the river by human beings can be reflected better.
Step 202, determining the sites divided by each key river reach as big sites or small sites according to the river basin area information in each key river reach information.
Optionally, in step 202, when determining that the station into which each key river reach information is divided is a large station or a small station according to the river basin area information in each key river reach information, the method specifically includes the following steps:
2021, comparing the river basin area in each important river reach information with a preset area threshold.
2022, if the river basin area in the information of a certain important river reach is greater than the preset area threshold, determining that the station divided by the important river reach is a large station.
2023, if the river basin area in the information of a certain important river reach is less than or equal to the preset area threshold, determining the station divided by the important river reach as a small station.
Optionally, in this embodiment, after obtaining the information of each key river reach, the key river reach of each partition is classified according to the river basin area information in the information of each key river reach, for example, if the area of the river basin in the information of a certain key river reach is greater than 10000km 2 Determining the station divided by the key river reach as a big station; if a certain point is emphasizedRiver reach information with river basin area less than or equal to 10000km 2 And determining the station divided by the key river reach as a small station.
And step 203, determining the sites divided by the key river reach as mountain sites or plain sites according to the topographic information in the key river reach information.
Optionally, in this embodiment, after obtaining the information of each significant river reach, the significant river reach of each partition is classified according to the topographic information in the information of each significant river reach, and the significant river reach is divided into a mountain area site and a plain site. And combining the determined stations of the big station and the small station, each area can be classified into any one of a large station in a mountainous area, a small station in the mountainous area, a large station in a plain and a small station in the plain.
And step 204, obtaining migration stimulation flow rate of each key river section in each site.
Specifically, in this embodiment, the migration stimulation flow velocity V1 of each critical river section in each site is obtained from the biological characteristic analysis table of the critical protected fish in each area.
In step 205, typical fish and river reach types of the important river reaches in each site are determined.
Optionally, in this embodiment, typical fishes and river reach types of the important river reaches in each site are determined according to a germplasm resource protected area distribution chart in a preset area.
And step 206, if the typical fish is determined to be fish producing drifting eggs, acquiring the safe drifting flow rate of the fish eggs.
Specifically, in this embodiment, if it is determined that typical fish in a certain important river reach is fish producing drifting eggs according to the germplasm resource protection area distribution chart in the preset area, it is determined that eggs produced by the fish in the important river reach can be successfully hatched only by floating or suspending on the water surface, so that the safe drifting flow rate V2 of the eggs needs to be obtained.
And step 207, if the river reach type is determined to be a main stream river reach, acquiring spawning stimulation flow rate.
Specifically, in this embodiment, if it is determined that a certain key river reach is a main river reach according to the germplasm resource protection zone distribution chart of the preset area, the spawning stimulation flow rate V3 is obtained.
And step 208, determining an initial ecological flow rate value according to the migration stimulation flow rate, or determining the initial ecological flow rate value according to the migration stimulation flow rate and the safe drifting flow rate and/or spawning stimulation flow rate of the fish eggs.
Specifically, in this embodiment, if the typical fish in the river reach is not a fish producing drifting eggs and the river reach is not a dry flow river reach, determining the migration stimulation flow velocity V1 as an initial value of ecological flow velocity; if the typical fish in the river reach is the fish with drifting eggs and/or the river reach is a dry flow river reach, the maximum value of the migration stimulation flow velocity V1 and the safe drifting flow velocity V2 and/or the spawning stimulation flow velocity V3 of the fish eggs is determined as the initial ecological flow velocity value. Because the migration stimulation flow velocity V1, the safe drifting flow velocity V2 of the fish eggs and the spawning stimulation flow velocity V3 are key influence factors of important life stages of fish migration, spawning, hatching and the like, the requirements of the fish migration, spawning and hatching need to be met simultaneously, and normal reproductive reproduction of the fish can be guaranteed, the maximum value of the migration stimulation flow velocity V1, the safe drifting flow velocity V2 of the fish eggs and the spawning stimulation flow velocity V3 is determined as an initial ecological flow velocity value.
It should be noted that, steps 204 to 208 are an alternative implementation of determining the initial ecological flow rate value of each key river segment in each site in step 103 in the first embodiment.
And step 209, acquiring the fish egg hatching time of typical fishes in each important river reach.
And step 210, determining the ecological flow rate background value according to the incubation time of the fish eggs.
Specifically, in this embodiment, according to the measured flow statistical data, the condition that the flow reaches the standard every month every day in nearly M years of the flow corresponding to different flow rates is analyzed, and if a certain month reaches the preset flow for N consecutive days, it is determined that the month reaches the standard; if 75% of months in the spawning period of a year can meet the requirement that the preset flow is reached in N days, determining that the year reaches the standard; and determining the flow rate corresponding to the preset flow rate reaching the standard in 75% of the years in M years as the background value of the ecological flow rate of the river reach.
Wherein N represents the hatching time of fish eggs of typical fishes in each key river reach. M may take the value of 10, or other suitable value.
It should be noted that, in the first embodiment, steps 209 to 210 are an alternative implementation manner for determining the ecological flow rate background value of each important river section in each site in step 103.
And step 211, comparing the initial value of the ecological flow rate with the background value of the ecological flow rate.
And 212, determining the maximum value of the initial value of the ecological flow velocity and the background value of the ecological flow velocity as the target value of the ecological flow velocity of the corresponding key river reach.
Optionally, in this embodiment, when determining the ecological flow rate target value of each key river reach, the normal reproduction and propagation requirements of the fish can be met by meeting not only the flow rate value corresponding to the minimum standard flow rate in the spawning period, but also the minimum flow rate value required for migration, spawning, and hatching of the fish. Therefore, the maximum value of the initial value of the ecological flow rate and the background value of the ecological flow rate needs to be determined as the target value of the ecological flow rate of the corresponding key river reach.
As shown in table 1, the ecological flow rate target value corresponding to each important river reach is determined for the schematic calculation result of the ecological flow rate target value of each important river reach in the area a.
Table 1: schematic table of ecological flow velocity target value accounting result of each key river reach in area A
And step 213, determining an ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach.
Optionally, in step 213, when determining the ecological flow rate threshold of the corresponding site according to the ecological flow rate target value of each important river reach, the method specifically includes the following steps:
2131, sequencing the ecological flow rate target values of the key river reach in each site from large to small;
and 2132, determining the ecological flow rate target value of the key river reach sequenced at the preset percentage position as the ecological flow rate threshold value of the site.
The preset percentage may be 75%, or may be another value.
Specifically, in this embodiment, according to a conventional means in the technical field of the present research, the ecological flow rate target values of the major river reach in each site are sorted from large to small, and the ecological flow rate target value of the major river reach sorted in 75% of the positions is determined as the ecological flow rate threshold of the site.
Table 2: schematic table of river ecological flow rate threshold value results of various types of sites in various regions
Wherein, the A, B, C, D, E area can represent different geographical areas of our country respectively.
As shown in table 2, with reference to table 1, the ecological flow velocity target values of the key river reach in each site are sorted from large to small, and the flow velocity value sorted at 75% is determined as the ecological flow velocity threshold of the site, so that the ecological flow velocity threshold of the mountain area large station in the area a is 0.7m/s, the ecological flow velocity threshold of the mountain area small station is 0.4m/s, the ecological flow velocity threshold of the plain large station is 0.6m/s, and the ecological flow velocity threshold of the plain small station is 0.3m/s.
And 214, determining target river reach adjustment data in the corresponding sites according to the ecological flow rate threshold corresponding to each site.
Specifically, in this embodiment, the difference is made between the ecological flow rate threshold corresponding to each site and the actual measured flow rate of the target river reach in the corresponding site, so as to obtain target river reach adjustment data.
Step 215, sending the target river reach adjustment data to the user terminal, so that the user adjusts the ecological flow rate of the target river reach according to the target river reach adjustment data displayed in the user terminal by adopting a preset adjustment strategy.
Specifically, in this embodiment, when the user adjusts the ecological flow rate of the target river reach by using a preset adjustment strategy, the method specifically includes: the water intake of industrial water is reduced, and the water storage capacity of a reservoir is reduced. Or other adjustment manners may also be included, which is not limited in this embodiment.
According to the method for determining the ecological flow velocity of the river, typical fishes and river reach types of key river reaches in each site are determined by obtaining migration stimulated flow velocity of the key river reaches in each site, and if the typical fishes are fishes producing drifting eggs, safe drifting flow velocity of the fish eggs is obtained; and if the river reach type is determined to be a main stream river reach, acquiring spawning stimulation flow rate. And determining an initial ecological flow rate value according to the migration stimulation flow rate, or determining the initial ecological flow rate value according to the migration stimulation flow rate and the safe drifting flow rate and/or spawning stimulation flow rate of the fish eggs. The method can be respectively considered for different typical fishes to determine the optimal flow rate of each key river reach suitable for the migration and spawning stages of the typical fishes as the initial ecological flow rate value, so that the initial ecological flow rate value can better reflect the flow rate requirements of the fishes in the migration and spawning stages, and the determined initial ecological flow rate value is more accurate. The method comprises the steps of obtaining the spawn incubation time of typical fishes in each key river reach, determining the ecological flow rate background value according to the spawn incubation time, and considering different typical fishes respectively to determine the optimal flow rate suitable for the typical fishes in each key river reach as the ecological flow rate background value, so that the determined ecological flow rate background value is more accurate. In this embodiment, the target river reach adjustment data in the corresponding site is determined according to the ecological flow rate threshold corresponding to each site, and the target river reach adjustment data is sent to the user terminal, so that the user adjusts the ecological flow rate of the target river reach according to the target river reach adjustment data displayed in the user terminal by using a preset adjustment strategy. The method can guide a user to effectively and quickly determine the river sensitive period ecological flow rate of the target river reach in the preset area range according to the target river reach adjustment data, and take corresponding measures for rivers with the determination results not reaching the standard so as to efficiently adjust the river ecological flow rate to the target ecological flow rate.
The invention also provides a river ecological flow rate determination device and a computer readable storage medium according to the embodiment of the invention.
Fig. 3 is a schematic structural diagram of the river ecological flow rate determination device according to the embodiment of the present invention. The river ecology flow rate determination apparatus is intended for various forms of digital computers such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 3, the electronic apparatus includes: a processor 301, a memory 302, and a transceiver 303. The processor 301, the memory 302, and the transceiver 303 are interconnected by a circuit. In particular, the various components are interconnected using a bus, and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions for execution within the electronic device.
The memory 302 is a computer readable storage medium provided by the present invention. The memory stores instructions executable by the at least one processor, so that the at least one processor executes the river ecological flow rate determination method provided by the invention. The computer-readable storage medium of the present invention stores computer instructions for causing a computer to execute the river ecological flow rate determination method provided by the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the invention following, in general, the principles of the embodiments of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments of the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of embodiments of the invention being indicated by the following claims.
It will be understood that the embodiments of the invention are not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the invention is limited only by the appended claims.
Claims (10)
1. A river ecological flow rate determination method is characterized by comprising the following steps:
obtaining key river reach information of each area in a preset area range;
aiming at each region, dividing the key river reach into stations of corresponding types according to the river basin area information and the terrain information in the key river reach information;
determining an initial value of ecological flow velocity and a background value of ecological flow velocity of each key river reach in each station;
determining the ecological flow rate target value of each key river reach according to the ecological flow rate initial value and the ecological flow rate background value;
determining an ecological flow rate threshold value of a corresponding station according to the ecological flow rate target value of each key river reach;
the determining of the ecological flow velocity background value of each key river reach in each site comprises the following steps:
analyzing the day-by-day flow standard reaching situation of each month in nearly M years of flow corresponding to different flow rates according to the measured flow statistical data, and if the P month reaches the preset flow for continuous N days, determining that the P month reaches the standard; wherein the P month is any month;
if 75% of months in the spawning period of the Q year can meet the requirement that N days in the period reach the preset flow once, determining that the Q year reaches the standard; wherein the Q year is any one of the last M years;
determining the flow rate corresponding to the preset flow rate reaching the standard in 75% of the years in M years as the background value of the ecological flow rate of the river reach; wherein N represents the hatching time of fish eggs of typical fishes in each important river section.
2. The method according to claim 1, wherein the dividing the key river reach into the corresponding types of stations according to the watershed area information and the terrain information in each key river reach information comprises:
determining the sites divided by each key river reach as big sites or small sites according to the river basin area information in each key river reach information;
and determining the sites divided by the key river reach as mountain sites or plain sites according to the topographic information in the key river reach information.
3. The method according to claim 2, wherein the determining that the station into which each key river reach information is divided is a large station or a small station according to the river basin area information in each key river reach information includes:
comparing the river basin area in each key river reach information with a preset area threshold;
if the river basin area in the information of a certain key river reach is larger than a preset area threshold, determining that the station divided by the key river reach is a large station;
and if the river basin area in the information of a certain key river reach is smaller than or equal to a preset area threshold value, determining the sites divided by the key river reach as the small sites.
4. The method of claim 1, wherein said determining an initial value of ecological flow rate for each significant river segment at each site comprises:
obtaining migration stimulation flow speed of each key river section in each site;
determining typical fishes and river reach types of key river reaches in each site;
if the typical fish is determined to be fish producing drifting eggs, acquiring the safe drifting flow rate of the fish eggs;
if the river reach type is determined to be a main stream river reach, acquiring spawning stimulation flow rate;
and determining an ecological flow velocity initial value according to the migration stimulation flow velocity, or determining the ecological flow velocity initial value according to the migration stimulation flow velocity and the safe drifting flow velocity and/or spawning stimulation flow velocity of the fish eggs.
5. The method of claim 1, wherein determining the ecological current background for each significant river segment at each site comprises:
obtaining the spawn incubation time of typical fishes in each key river reach;
and determining the ecological flow rate background value according to the incubation time of the fish eggs.
6. The method of claim 1, wherein the determining the ecological flow rate target value of each key river segment according to the ecological flow rate initial value and the ecological flow rate background value comprises:
comparing the initial value of the ecological flow velocity with the background value of the ecological flow velocity;
and determining the maximum value of the initial value of the ecological flow velocity and the background value of the ecological flow velocity as the target value of the ecological flow velocity of the corresponding key river reach.
7. The method of claim 1, wherein determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach comprises:
sequencing the ecological flow rate target values of the key river reach in each station from large to small;
and determining the ecological flow rate target value of the key river reach sequenced at the preset percentage position as the ecological flow rate threshold value of the site.
8. The method according to any one of claims 1 to 7, wherein after determining the ecological flow rate threshold value of the corresponding site according to the ecological flow rate target value of each key river reach, the method further comprises:
determining target river reach adjustment data in corresponding sites according to the ecological flow rate threshold corresponding to each site;
and sending the target river reach adjustment data to a user terminal so that a user adjusts the ecological flow rate of the target river reach by adopting a preset adjustment strategy according to the target river reach adjustment data displayed in the user terminal.
9. An electronic device, comprising:
a memory, a processor, and a transceiver;
the processor, the memory and the transceiver are interconnected through a circuit;
the memory stores computer-executable instructions; the transceiver is used for sending target river reach adjusting data to the user terminal;
execution of the computer-executable instructions stored by the memory by the at least one processor causes the at least one processor to perform the river ecological flow rate determination method as recited in any one of claims 1-8.
10. A computer-readable storage medium, having stored thereon a computer program which is executed by a processor to implement the river ecological flow rate determination method according to any one of claims 1 to 8.
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