CN117576863A - Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage - Google Patents
Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage Download PDFInfo
- Publication number
- CN117576863A CN117576863A CN202311552038.5A CN202311552038A CN117576863A CN 117576863 A CN117576863 A CN 117576863A CN 202311552038 A CN202311552038 A CN 202311552038A CN 117576863 A CN117576863 A CN 117576863A
- Authority
- CN
- China
- Prior art keywords
- small hydropower
- area
- ice
- snow
- basin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002265 prevention Effects 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 238000004590 computer program Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000010309 melting process Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/14—Rainfall or precipitation gauges
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/10—Terrestrial scenes
- G06V20/13—Satellite images
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Remote Sensing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Computer Graphics (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- Geology (AREA)
- Emergency Management (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Astronomy & Astrophysics (AREA)
- Hydrology & Water Resources (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Alarm Systems (AREA)
Abstract
The application discloses a small hydropower station flood prevention safety precaution method and system combined with glacier snow cover, comprising the following steps of acquiring water level data of a target small hydropower station river basin in a designated period; acquiring meteorological information of a target small hydropower station river basin area; acquiring satellite image information of an ice and snow covered partial area of a small water and electricity river basin of a target based on satellite remote sensing data; determining rainfall information of the target small hydropower basin; determining rainfall information of a target small hydropower basin; determining ice and snow melting amount data of an ice and snow covered part area of a target small hydropower basin according to the acquired meteorological information and the satellite image information; and predicting the water inflow of a target small hydropower station river basin in a future period according to the rainfall information and the ice and snow melting amount data. According to the method, according to the rainfall and ice melting process of the area where the small hydropower station is located, flood control safety warning of the small hydropower station is achieved, and flood control safety management capacity of the small hydropower station is improved.
Description
Technical Field
The application relates to the technical field of hydropower station safety analysis, in particular to a small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage.
Background
The small hydropower station refers to a small hydropower station with the capacity of less than 5 ten thousand kilowatts; hydropower stations with capacities less than 0.5MW are also known as rural small hydropower stations.
The small hydropower engineering is simple, the construction period is short, the primary capital investment is small, and the comprehensive influence on the aspects of reservoir inundation loss, immigration, environment, ecology and the like is very small. Because the small hydropower station is close to the user, the power transmission and transformation equipment is simple, the transmission loss of the line is small, and the like. However, when the management foundation of the small hydropower station is poor and once the mountain floods or the water flows are over-standard, the probability of accidents is very high, flood control safety construction needs to be enhanced, and a water level station on a dam needs to be built for each small hydropower station with a reservoir for monitoring water level change and timely giving out water level over-warning prompts.
However, even if the water level station on the dam is established, the essential technical problem of low capacity of the small hydropower reservoir cannot be solved. Especially, for example, in flood season, under the superposition influence of factors such as rainy season, climate warming, etc., the flood prevention safety management capability of the small hydropower is required to be improved.
Disclosure of Invention
The embodiment of the application provides a small hydropower station flood control safety early warning method and system combined with glacier snow cover, which are used for realizing flood control safety warning of small hydropower stations according to the rainfall and ice melting process of the area where the small hydropower stations are located and improving the flood control safety management capacity of the small hydropower stations.
The embodiment of the application provides a small hydropower flood prevention safety early warning method combined with glacier snow coverage, which comprises the following steps:
and a data acquisition step: acquiring water level data of a target small hydropower station river basin in a designated period;
acquiring weather information of a target small hydropower station river basin area from a weather station of the target small hydropower station river basin area;
acquiring satellite image information of an ice and snow covered partial area of a small water and electricity river basin of a target based on satellite remote sensing data;
and a data processing step: determining rainfall information of the target small hydropower basin based on the acquired meteorological information;
determining rainfall information of a target small hydropower basin based on the acquired meteorological information;
determining ice and snow melting amount data of an ice and snow covered part area of a target small hydropower basin according to the acquired meteorological information and the satellite image information;
and predicting the water inflow of a target small hydropower basin in a future period according to the rainfall information and the ice and snow melting amount data so as to execute flood prevention early warning based on the acquired water level data of the target small hydropower basin.
Optionally, the method further comprises the steps of obtaining the topographic data of the target small hydropower station river basin area, dividing the tributaries and the main flows covered by the target small hydropower station river basin into a plurality of subareas according to the topographic data and the preset elevation intervals.
Optionally, dividing the tributaries and the main flows covered by the target small hydropower station river basin into a plurality of subareas according to a preset elevation interval includes:
constructing a terrain model of the coverage area of the small hydropower station river basin according to the terrain data;
dividing the coverage area of the target small hydropower basin into middle areas of a plurality of elevation intervals according to a preset elevation interval;
for any intermediate region, a plurality of sub-regions are divided in the following manner:
determining the position information of the tributaries or the main stream from the middle area;
determining the two sides of the tributary or the main stream from the terrain data based on the terrain model by taking the position information of the tributary or the main stream as a reference standard, and determining the boundary of the sub-region at the slope inflection point part;
dividing each middle area into a plurality of sub-areas according to the determined boundary of each sub-area and the position information of the tributaries or the main stream, and eliminating the areas which do not contain the tributaries or the main stream in the boundary, so that any sub-area contains one tributaries or the main stream and the related geographic range.
Optionally, determining rainfall information of the target small hydropower basin based on the acquired meteorological information includes:
for any subarea, according to the acquired meteorological information, establishing an incoming water quantity prediction model under different rainfall intensities:
Q n ＝((1-α n )(S n -s rn )+s rn )q n Δt
wherein Q is n Is the incoming water pre-measurement in the main or sub-stream flowing into the nth sub-zone, q n Is the average rainfall intensity of the nth sub-area in the meteorological information in the sampling period delta t, S n Is the area of the nth sub-region, s rn Is the area of the main or sub-stream in the nth sub-region, alpha n Is the rainwater retention rate of the nth sub-area, alpha n Is configured according to the terrain structure of the area and the rainfall intensity, wherein the larger the terrain gradient is, the higher the rainfall intensity is, and the smaller the rainwater retention is.
Optionally, predicting the water inflow of the target small hydropower basin in the future period according to the rainfall information and the ice and snow melting amount data includes:
based on each tributary and main stream of the coverage area of the target small hydropower station river basin, dividing the tributary and main stream into subareas, configuring numbers to assign continuous subareas and numbers to one tributary or main stream;
based on each subarea and the number, calculating flow data of each tributary, and meeting the following conditions:
wherein Q is M The predicted amount of incoming water for the mth tributary,the incoming water prediction quantity of the M sub-area of the M branch flow is 1-M < L, L is the total number of divided sub-areas, N M The number of subregions for the mth substream;
based on the calculated flow data of each tributary, predicting the water inflow of a target small hydropower basin in a future period, and meeting the following conditions:
wherein Q is a For the incoming water prediction calculated based on each sub-region of the main stream, K is the total number of branches.
Optionally, determining the ice and snow melting amount data of the ice and snow covered part area of the target small hydropower station river basin according to the acquired meteorological information and the satellite image information includes:
determining ice and snow coverage areas in each tributary or main stream according to the satellite image information and the divided multiple sub-areas;
the acquired weather information and the temperature range of each ice and snow covered area are determined according to a preset elevation interval;
according to the temperature range of any ice and snow covered area, calculating the ice and snow melting amount data of any ice and snow covered area according to the covered area of any ice and snow covered area, wherein the ice and snow melting amount data of any ice and snow covered area meets the following conditions:
wherein,is the amount of ice and snow melting in the main flow or the sub flow flowing into the nth sub area, lambda n Is ice and snow melting rate in corresponding temperature range, < ->Is the ice and snow covered area of any ice and snow covered area.
Optionally, determining the ice and snow coverage area in each tributary or main stream according to the satellite image information and the divided multiple sub-areas includes:
for any sub-region divided, identifying a white region in the corresponding satellite image;
determining the number of pixel points occupied by a white area in a satellite image;
and calculating the area of the ice and snow covered area in each tributary or main stream according to the preset proportional relation and the number of pixel points occupied by the white area.
The embodiment of the application also provides a small hydropower flood prevention safety precaution system combined with glacier snow cover, which comprises a processor and a memory, wherein a computer program is stored in the memory, and the computer program is executed by the processor to realize the steps of the small hydropower flood prevention safety precaution method combined with glacier snow cover.
The small hydropower station flood control safety precaution method is used for realizing flood control safety warning of the small hydropower station according to the rainfall and ice melting process of the area where the small hydropower station is located, and improving the flood control safety management capacity of the small hydropower station.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following specific embodiments of the present invention are specifically described.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a basic flow chart of the small hydropower station flood prevention safety precaution method in this embodiment.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The existing small hydropower station flood control early warning work currently adopts a manual experience method to combine with a monitored water level to warn the flood, for example, in some practical applications, flood control objects are qualitatively evaluated and risk grades are classified according to red, orange, yellow and blue, and an evaluation result has subjectivity of artificial judgment. The mode of monitoring the dam water level is difficult to timely respond to the flood season work in advance, and often the processing time reserved for workers is less under the condition of monitoring the water level rising.
The embodiment of the application provides a small hydropower flood prevention safety early warning method combined with glacier snow coverage, which is shown in fig. 1 and comprises the following steps:
and a data acquisition step: in step S101, water level data of a target small water basin is acquired at a specified period. In some examples, the designated period may be a flood period according to the location of the small hydropower station, or a period set according to historical meteorological data, and the water level behind the small hydropower dam may be monitored in real time to realize flood prevention early warning based on the monitored water level data and the predicted water supply in the following examples.
In step S102, weather information of the target small hydropower station basin area is acquired from the weather station of the target small hydropower station basin area.
In step S103, satellite image information of the ice and snow covered partial region of the target small hydropower station basin is acquired based on the satellite remote sensing data. In some examples, satellite image information of the ice and snow covered partial area of the target small hydropower basin may be acquired according to a set period, and the specific satellite image information may include a satellite image and an acquisition time of the image.
And a data processing step: in step S104, rainfall information of the target small hydropower basin is determined based on the acquired weather information. In some embodiments, the method further includes obtaining terrain data of a target small hydropower station river basin area, dividing a tributary and a main current covered by the target small hydropower station river basin into a plurality of subareas according to a preset elevation interval according to the terrain data, and in particular in the follow-up embodiments, determining predicted water inflow based on the plurality of subareas respectively, so as to predict the water inflow of the whole target small hydropower station river basin in a future period.
In step S105, rainfall information of the target small hydropower basin is determined based on the acquired weather information.
In step S106, according to the acquired weather information and the satellite image information, the ice and snow melting amount data of the ice and snow covered partial area of the target small hydropower station river basin is determined.
In step S107, the water inflow of the target small hydropower station in the future period is predicted according to the rainfall information and the ice and snow melting amount data, so as to perform flood prevention early warning based on the acquired water level data of the target small hydropower station.
The small hydropower station flood control safety precaution method is used for realizing flood control safety warning of the small hydropower station according to the rainfall and ice melting process of the area where the small hydropower station is located, and improving the flood control safety management capacity of the small hydropower station.
In some embodiments, dividing the tributaries and the main flows covered by the target small hydropower station river basin into a plurality of sub-areas according to a preset elevation interval includes:
from the terrain data, a terrain model of the coverage of the target small hydropower basin is constructed, which in some examples may be constructed in conjunction with 3D modeling software.
And dividing the coverage area of the target small hydropower basin into middle areas of a plurality of elevation intervals according to a preset elevation interval. In a specific embodiment, according to the coverage area of the actual target small hydropower station river basin, the middle areas of the multiple elevation intervals can be divided in different elevations according to the division of the elevation intervals.
Based on the intermediate regions of the partitioned plurality of elevation intervals, further employing the subsequent examples to determine sub-regions associated with the target small hydropower basin, in some embodiments, for any intermediate region, the plurality of sub-regions are partitioned in the following manner:
from the intermediate area, position information of tributaries or main streams is determined. Specifically, the position information of the tributaries or the main flows can be determined according to the actual topography relation or the built topography model, for example, the position information of the tributaries or the main flows can be marked in 3D modeling software.
And determining the two sides of the tributary or the main stream from the terrain data based on the terrain model by taking the position information of the tributary or the main stream as a reference standard, and determining the boundary of the sub-region at the inflection point part of the slope in the region where the slope is continuously positive or continuously negative. In a specific example, the boundary of the subarea may be determined according to the slope or the slope extending direction in the subarea in the terrain model, for example, the boundary area may be determined at the inflection point of the slope by using the slope, and the inflection point referred to in the embodiment of the present application may be that the slope continuously and stably changes from positive or negative to negative or positive, so as to determine the inflection point area as the boundary area of the subarea.
Dividing each middle area into a plurality of sub-areas according to the determined boundary of each sub-area and the position information of the tributaries or the main stream, and eliminating the areas which do not contain the tributaries or the main stream in the boundary, so that any sub-area contains one tributaries or the main stream and the related geographic range. After the boundaries of all the subareas are determined, the areas which do not contain tributaries or main flows in the boundaries are removed according to the division of the elevation intervals, and the areas do not bring additional water inflow to the river basin and do not participate in subsequent calculation.
In some embodiments, determining rainfall information for the target small hydropower basin based on the acquired weather information includes:
for any subarea, according to the acquired meteorological information, establishing an incoming water quantity prediction model under different rainfall intensities:
Q n ＝((1-α n )(S n -s rn )+s rn )q n Δt
wherein Q is n Is the incoming water pre-measurement in the main or sub-stream flowing into the nth sub-zone, q n Is the average rainfall intensity of the nth sub-area in the meteorological information in the sampling period delta t, S n Is the area of the nth sub-region, s rn Is the area of the main or sub-stream in the nth sub-region, alpha n Is the rainwater retention rate of the nth sub-area, alpha n Is configured according to the terrain structure of the area and the rainfall intensity, wherein the larger the terrain gradient is, the higher the rainfall intensity is, and the smaller the rainwater retention is.
In some embodiments, predicting the coming water volume of the target small hydropower basin for the future period according to the rainfall information and the ice and snow melting volume data comprises:
based on each tributary and main stream of the coverage area of the small water current basin of the target, dividing subareas, configuring numbers to assign continuous subareas and numbers to one tributary or main stream, and in such a way, the subareas and serial numbers which participate in continuous water inflow calculation can be determined according to the actual water inflow of the basin, and in some applications, flood prevention early warning can be carried out on a certain subarea according to the water inflow prediction of a single subarea, so that the content of the subarea is not involved in the application and is not described.
Based on each subarea and the number, calculating flow data of each tributary, and meeting the following conditions:
wherein Q is M The predicted amount of incoming water for the mth tributary,the incoming water prediction quantity of the M sub-area of the M branch flow is 1-M < L, L is the total number of divided sub-areas, N M The number of sub-regions for the mth substream. In some specific examples, can also be according toThe incoming water pre-measurement of any branch is used for carrying out local flood control pre-warning on a certain area.
Based on the calculated flow data of each tributary, predicting the water inflow of a target small hydropower basin in a future period, and meeting the following conditions:
wherein Q is a For the incoming water prediction calculated based on each sub-region of the main stream, K is the total number of branches.
In some embodiments, determining the ice and snow melting amount data of the ice and snow covered partial area of the target small hydropower basin according to the acquired meteorological information and the satellite image information includes:
and determining ice and snow coverage areas in each tributary or main stream according to the satellite image information and the divided multiple sub-areas.
And determining the temperature range of each ice and snow covered area according to the acquired meteorological information and a preset elevation interval. In this embodiment of the present application, the temperature range of each ice and snow covered area is determined according to weather information, and in a specific example, the temperature of each elevation area is a tendency of gradually decreasing with a high Cheng Yue high temperature, so in this embodiment of the present application, the elevation area divided by the foregoing embodiment is directly utilized, and thus the temperature range of each ice and snow covered area can be determined.
According to the temperature range of any ice and snow covered area, calculating the ice and snow melting amount data of any ice and snow covered area according to the covered area of any ice and snow covered area, wherein the ice and snow melting amount data of any ice and snow covered area meets the following conditions:
wherein,is the amount of ice and snow melting in the main flow or the sub flow flowing into the nth sub area, lambda n Is in a corresponding temperature rangeMelting rate of ice and snow lambda n Can be obtained according to experimental measurement and calculation>Is the ice and snow covered area of any ice and snow covered area.
In some embodiments, determining ice and snow covered areas in each tributary or main stream based on the satellite image information and the divided plurality of sub-regions comprises:
for any sub-region divided, a white region in the corresponding satellite image is identified, and in this embodiment of the present application, a white color value range may be configured in a specific implementation, and whether the white region is determined according to a pixel value of each pixel point.
And determining the number of pixel points occupied by the white area in the satellite image. In some implementations, the number of pixels occupied by the white area is determined according to the above-defined sub-areas, so as to determine the coverage area of the ice and snow on any sub-area.
And calculating the area of the ice and snow covered area in each tributary or main stream according to the preset proportional relation and the number of pixel points occupied by the white area. After the coverage area is determined, ice and snow melting amount data can be calculated by using the determined coverage area for any subarea, so that the ice and snow melting amount data is overlapped into the calculated incoming water prediction amount of each tributary or main flow. And finally, executing flood prevention early warning according to the incoming water pre-measurement of each tributary or main stream and the acquired water level data of the target small hydropower basin.
According to the small hydropower station flood prevention safety early warning method, the problems of wide distribution of small hydropower stations and high storage capacity sensitivity can be solved, the flood prevention safety early warning of the small hydropower station in the river basin in advance is achieved by predicting the water supply of the small hydropower station river basin in the future period, and therefore the safety and reliability of the operation of the small hydropower stations are improved.
The embodiment of the application also provides a small hydropower flood prevention safety precaution system combined with glacier snow cover, which comprises a processor and a memory, wherein a computer program is stored in the memory, and the computer program is executed by the processor to realize the steps of the small hydropower flood prevention safety precaution method combined with glacier snow cover.
Furthermore, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across schemes), adaptations or alterations based on the present disclosure. The examples are not limited to the examples described in this specification or during the practice of this application, which examples are to be construed as non-exclusive.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description.
The above embodiments are merely exemplary embodiments of the present disclosure, and those skilled in the art may make various modifications or equivalents to the present invention within the spirit and scope of the present disclosure, and such modifications or equivalents should also be construed as falling within the scope of the present invention.
Claims (8)
1. The utility model provides a little water and electricity flood prevention safety precaution method that combines glacier snow to cover which characterized in that includes:
and a data acquisition step: acquiring water level data of a target small hydropower station river basin in a designated period;
acquiring weather information of a target small hydropower station river basin area from a weather station of the target small hydropower station river basin area;
acquiring satellite image information of an ice and snow covered partial area of a small water and electricity river basin of a target based on satellite remote sensing data;
and a data processing step: determining rainfall information of the target small hydropower basin based on the acquired meteorological information;
determining rainfall information of a target small hydropower basin based on the acquired meteorological information;
determining ice and snow melting amount data of an ice and snow covered part area of a target small hydropower basin according to the acquired meteorological information and the satellite image information;
and predicting the water inflow of a target small hydropower basin in a future period according to the rainfall information and the ice and snow melting amount data so as to execute flood prevention early warning based on the acquired water level data of the target small hydropower basin.
2. The small hydropower flood prevention safety precaution method combined with glacier snow cover according to claim 1, further comprising the steps of obtaining topographic data of a target small hydropower basin area, dividing tributaries and main flows covered by the target small hydropower basin into a plurality of subareas according to the topographic data and preset elevation intervals.
3. The small hydropower flood control safety precaution method combined with glacier snow cover according to claim 2, wherein dividing the tributaries and the main flows covered by the target small hydropower basin into a plurality of subareas according to a preset elevation interval comprises:
constructing a terrain model of the coverage area of the small hydropower station river basin according to the terrain data;
dividing the coverage area of the target small hydropower basin into middle areas of a plurality of elevation intervals according to a preset elevation interval;
for any intermediate region, a plurality of sub-regions are divided in the following manner:
determining the position information of the tributaries or the main stream from the middle area;
determining the two sides of the tributary or the main stream from the terrain data based on the terrain model by taking the position information of the tributary or the main stream as a reference standard, and determining the boundary of the sub-region at the slope inflection point part;
dividing each middle area into a plurality of sub-areas according to the determined boundary of each sub-area and the position information of the tributaries or the main stream, and eliminating the areas which do not contain the tributaries or the main stream in the boundary, so that any sub-area contains one tributaries or the main stream and the related geographic range.
4. The small hydropower flood control safety precaution method in combination with glacier snow coverage of claim 3, wherein determining rainfall information of the target small hydropower basin based on the acquired weather information comprises:
for any subarea, according to the acquired meteorological information, establishing an incoming water quantity prediction model under different rainfall intensities:
Q n ＝((1-α n )(S n -s rn )+s rn )q n Δt
wherein Q is n Is the incoming water pre-measurement in the main or sub-stream flowing into the nth sub-zone, q n Is the average rainfall intensity of the nth sub-area in the meteorological information in the sampling period delta t, S n Is the area of the nth sub-region, s rn Is the area of the main or sub-stream in the nth sub-region, alpha n Is the rainwater retention rate of the nth sub-area, alpha n Is configured according to the terrain structure of the area and the rainfall intensity, wherein the larger the terrain gradient is, the higher the rainfall intensity is, and the smaller the rainwater retention is.
5. The small hydropower flood control safety precaution method combined with glacier snow coverage according to claim 4, wherein predicting the water coming amount of the target small hydropower basin in the future period according to the rainfall information and the ice and snow melting amount data comprises:
based on each tributary and main stream of the coverage area of the target small hydropower station river basin, dividing the tributary and main stream into subareas, configuring numbers to assign continuous subareas and numbers to one tributary or main stream;
based on each subarea and the number, calculating flow data of each tributary, and meeting the following conditions:
wherein Q is M The predicted amount of incoming water for the mth tributary,the incoming water prediction quantity of the M sub-area of the M branch flow is 1-M < L, L is the total number of divided sub-areas, N M The number of subregions for the mth substream;
based on the calculated flow data of each tributary, predicting the water inflow of a target small hydropower basin in a future period, and meeting the following conditions:
wherein Q is a For the incoming water prediction calculated based on each sub-region of the main stream, K is the total number of branches.
6. The small hydropower flood control safety precaution method combined with glacier snow coverage according to claim 5, wherein determining the ice and snow melting amount data of the ice and snow covered partial area of the target small hydropower basin according to the acquired meteorological information and the satellite image information comprises:
determining ice and snow coverage areas in each tributary or main stream according to the satellite image information and the divided multiple sub-areas;
the acquired weather information and the temperature range of each ice and snow covered area are determined according to a preset elevation interval;
according to the temperature range of any ice and snow covered area, calculating the ice and snow melting amount data of any ice and snow covered area according to the covered area of any ice and snow covered area, wherein the ice and snow melting amount data of any ice and snow covered area meets the following conditions:
wherein,is the amount of ice and snow melting in the main flow or the sub flow flowing into the nth sub area, lambda n Is ice and snow melting rate in corresponding temperature range，/>Is the ice and snow covered area of any ice and snow covered area.
7. The small hydropower flood control safety precaution method combined with glacier snow coverage according to claim 6, wherein determining the ice and snow coverage area in each tributary or main stream according to the satellite image information and the divided plurality of sub-areas comprises:
for any sub-region divided, identifying a white region in the corresponding satellite image;
determining the number of pixel points occupied by a white area in a satellite image;
and calculating the area of the ice and snow covered area in each tributary or main stream according to the preset proportional relation and the number of pixel points occupied by the white area.
8. A small hydropower flood control safety precaution system combined with glacier snow cover, characterized by comprising a processor and a memory, wherein the memory is stored with a computer program, and the computer program when executed by the processor realizes the steps of the small hydropower flood control safety precaution method combined with glacier snow cover according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311552038.5A CN117576863B (en) | 2023-11-20 | Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311552038.5A CN117576863B (en) | 2023-11-20 | Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117576863A true CN117576863A (en) | 2024-02-20 |
| CN117576863B CN117576863B (en) | 2024-06-07 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257005A (en) * | 2008-04-18 | 2009-11-05 | Shimizu Corp | Rainwater utilization system for elevated road |
| CN112686426A (en) * | 2020-12-09 | 2021-04-20 | 贵州黔源电力股份有限公司 | Incoming water quantity early warning method and system based on hydropower station basin key points |
| CN114118870A (en) * | 2021-12-08 | 2022-03-01 | 中国水利水电科学研究院 | Downstream flood estimation method for coupling iced lake burst flood and snowmelt flood |
| CN116362419A (en) * | 2023-05-31 | 2023-06-30 | 聊城市科慧市政工程设计院有限公司 | Urban flood control early warning system and method |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257005A (en) * | 2008-04-18 | 2009-11-05 | Shimizu Corp | Rainwater utilization system for elevated road |
| CN112686426A (en) * | 2020-12-09 | 2021-04-20 | 贵州黔源电力股份有限公司 | Incoming water quantity early warning method and system based on hydropower station basin key points |
| CN114118870A (en) * | 2021-12-08 | 2022-03-01 | 中国水利水电科学研究院 | Downstream flood estimation method for coupling iced lake burst flood and snowmelt flood |
| CN116362419A (en) * | 2023-05-31 | 2023-06-30 | 聊城市科慧市政工程设计院有限公司 | Urban flood control early warning system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108597189B (en) | distributed medium and small watershed geological disaster and flood early warning method based on critical rainfall | |
| CN108227041B (en) | Horizontal visibility forecasting method based on site measured data and mode result | |
| JP6139127B2 (en) | Rainwater storage tank water level management system | |
| CN112785053A (en) | Method and system for forecasting urban drainage basin flood | |
| CN107169645B (en) | Power transmission line fault probability online evaluation method considering influence of rainstorm disaster | |
| KR101718294B1 (en) | Predicting system for drought | |
| Winstral et al. | An efficient method for distributing wind speeds over heterogeneous terrain | |
| CN106779232B (en) | Modeling prediction method for urban inland inundation | |
| CN115391712A (en) | Urban flood risk prediction method | |
| CN109815611B (en) | Basin boundary generating method based on digital basin | |
| CN117173871B (en) | Flood prevention monitoring method and system | |
| CN115115262B (en) | Flood risk disaster assessment method | |
| CN116362419B (en) | Urban flood control early warning system and method | |
| CN115099162B (en) | Correction method for wind field under complex terrain | |
| CN115186858A (en) | Transformer substation flood inundation risk early warning method and system based on different influence types | |
| Khalyasmaa et al. | Integrating GIS technologies in hydro power plant cascade simulation model | |
| CN117576863B (en) | Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage | |
| CN114493005A (en) | Early warning method and system for predicting river flow based on rainfall | |
| CN117576863A (en) | Small hydropower station flood prevention safety early warning method and system combined with glacier snow coverage | |
| CN113919125A (en) | Flood control forecast scheduling method based on regional production convergence coupling model system | |
| CN112905721B (en) | Database system for sponge city construction projects | |
| CN107680339B (en) | Sinkiang medium and small river short-term flood early warning system based on dual-system platform | |
| CN113269376B (en) | River flood peak flow range calculation method | |
| CN115644039A (en) | Irrigation decision-making system and method based on agricultural system model | |
| KR101339937B1 (en) | Quantification system for wind effect on daily minimum temperature within cold air pools and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |