CN114528360B - Rapid flow distribution generation method based on flow velocity change - Google Patents
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Abstract
A rapid flow distribution generation method based on flow velocity change relates to the technical field of hydrologic monitoring. For yielding water distribution situations that can be fast in emergency situations. The rapid flow distribution generation method based on the flow velocity change comprises the following steps: s1: analyzing the geographic environment data of the target area; s2: generating a first element flow database; s3: generating a second element flow database; s4, generating a calculation result and storing the calculation result as a regional static flow database; s5, generating a regional dynamic flow rate database; s6, calculating the distribution condition of each block of the water flow in the current area according to the total inflow water quantity query database, wherein the database comprises at least one of a first flow factor database, a second flow factor database and an area dynamic flow rate database. The method has the beneficial effect that the running water distribution situation can be generated rapidly.
Description
Technical Field
The invention relates to the technical field of hydrologic monitoring, in particular to a rapid generation method of flow distribution based on flow velocity change.
Background
In the field of production and application such as farmland irrigation, precipitation distribution, flood discharge and flood diversion, the water distribution condition in the production and application can be initially analyzed at present by virtue of rich topographic data, and a guiding basis is provided for the production and application. However, the three-dimensional calculation is carried out only by means of the ground topography data, and the influence of evaporation speed caused by air humidity and temperature, the permeation factors of different properties of the land, the conditions of rivers, groundwater or other artificial drainage facilities around the target area and the like are not considered, so that deviation between the data of analog calculation analysis and the actual occurrence can be caused; because the water distribution calculation is a dynamic process, each calculation in the traditional algorithm needs to consume a great deal of calculation force and calculation time, and a quick calculation result cannot be provided in emergency situations.
Disclosure of Invention
The invention aims to provide a rapid generation method of running water distribution based on flow velocity change, which is used for rapidly obtaining water distribution under emergency conditions.
The technical scheme adopted for solving the technical problems is as follows:
a rapid flow distribution generation method based on flow velocity change comprises the following steps:
a rapid flow distribution generation method based on flow velocity change comprises the following steps:
S1: by analyzing the geographical environment data of the target area, several factors influencing the current water flow collection speed change are found out, wherein the factors comprise topography factors, geological factors, environmental factors and surrounding related facility factors;
s2: taking the topography factors as first factors for flow rate change, dividing a target area into a plurality of blocks according to different flow rates, calculating the catchment capacity and the flow rate of each block at the current moment according to the data of the first factors when the flow rates of the blocks change, and storing all calculation results as a first factor flow database;
S3: the geological factors are used as second factors for flow rate change, the blocks divided by the first factors are further divided into a plurality of stages, on the basis of the first factor flow database, when the flow rate in each block changes according to the data of the second factors, the water collecting capacity and the flow rate of each block at the current moment are calculated, and all calculation results are stored as a second factor flow database;
S4, taking the related facilities around as a third element of flow velocity change, taking triggering construction as a condition, further refining the second element flow database, stopping subsequent flow convergence by the blocks when the flow is converged to the drainage facilities around, the river and the underground water, calculating the current water collecting capacity and the flow velocity of each block by taking the triggering moment as a condition, and storing all calculation results as a regional static flow database;
s5, taking the environmental factors as fourth factors of flow rate change, and calculating and generating a regional dynamic flow rate database according to air temperature and humidity factors;
S6, calculating the distribution condition of each block of the water flow in the current area according to the total inflow water quantity query database, wherein the database comprises at least one of a first flow factor database, a second flow factor database and an area dynamic flow rate database.
Further, the distribution conditions include the total water to be distributed, the water to be distributed and the water level.
Further, the step S6 specifically includes the following steps:
S6.1, acquiring the environmental condition of the current area, calculating the total water quantity affected by the environment according to the dynamic flow rate database of the area,
V＝V0*f(t，h)
Wherein V 0 represents the input total water quantity, t represents the current environment temperature, h represents the current environment, and V is the calculated total water quantity to be distributed;
S6.2, searching the regional static flow database according to the V value, referring to the stage water quantity of the regional static flow database, finding out the corresponding water collecting stage i and stage water quantity V i, and calculating the water quantity V 'to be distributed'
V′＝V0-Vi；
S6.3, determining the water capacity V in and the flow rate value S in of each block in the current water collecting stage, and distributing the water quantity V' to be distributed into each block according to the flow rate value S in
Vn＝Vin+V′*Sin
S6.4, calculating the water surface height H according to the water quantity and the ground type data of each block n
Hn＝h(Vn,DEM)
Wherein the DEM is a ground type file corresponding to the block.
And S7, calculating the water distribution condition of each block in the current area according to the water surface height of a certain area.
Further, the method of S7 is as follows:
Searching the regional static flow database according to the block ID and the H value, referring to the stage height in the regional static flow database, and finding out the corresponding water collecting stage i and stage height H i0, and a flow speed value S in;
Calculating the water collecting allowance in the block according to the ground file and the height difference of the block
Vi0＝h(H-Hi0,DEM)
The DEM is a ground type file corresponding to the block;
Calculating the water collecting allowance V i of the whole area according to the flow rate value S in of the block:
Vi＝Vi0/Si0
Determining the water capacity V in and the flow rate value V in of other blocks in the current catchment stage, and distributing the water quantity V i to be distributed into each block according to the flow rate value S in
Vn＝Vin+Vi*Sin；
Calculating the water surface height H according to the water volume and the ground data of other blocks n
Hn＝h(Vn,DEM)
Wherein the DEM is a ground type file corresponding to the block.
The beneficial effects are that:
According to the rapid generation method of the running water distribution based on the flow velocity change, provided by the invention, more parameters are introduced into a calculation model for calculating the water distribution by analyzing the factors influencing the total water quantity and the factors influencing the running water distribution, so that the calculation precision of the model is improved, and the use environment is enriched; meanwhile, by a method of separating static factors and dynamic factors, the calculation process of the static influence factors is stored in a mode of an intermediate database, and calculation is carried out by inquiring the database in the subsequent process, so that repeated calculation of complicated ground type and running water processes is avoided, and the calculation speed in the application process is greatly improved. The invention can rapidly obtain the distribution condition of the flowing water, and solves the problem that the distribution condition of the flowing water cannot be rapidly obtained in the actual use process.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The first element flow database, the second element flow database, and the regional static flow database mentioned in the summary of the invention are in the form of tables in the present embodiment, and are referred to as a first element flow table, a second element flow table, and a regional static flow table, respectively, according to the specific forms adopted in the following description.
For each database, besides tables, those skilled in the art can choose databases in different specific forms according to different application scenarios of the present invention.
A rapid generation method of running water distribution based on flow velocity change comprises the following steps
S1: by analyzing the geographical environment data of the target area, several key factors affecting the current water flow collection speed change are found out, including terrain, geology, environment and surrounding related facilities.
S2: the target area is divided into a plurality of blocks according to different flow rates by taking a topography factor as a first factor of flow rate change. In the process of converging the flowing water, the converging speeds of all the blocks are different due to different entering modes of the flowing water; meanwhile, the aggregation, additional injection, block merging and other phenomena of the adjacent blocks in the aggregation process can also cause the aggregation speed of each block to change. According to the data of the first element, when the flow rate of a certain block changes, calculating the water collecting capacity and the flow rate of each block at the current moment, and storing all calculation results as a first element flow table (as follows):
Wherein:
id represents the phase of flow rate variation;
vn represents the total water quantity in the n stage;
Vkm-n represents the existing water quantity of the mth block in the nth stage;
Hkm-n represents the water surface height of the mth block at the nth stage;
skm-n represents the water flow velocity of the mth block at the nth stage;
tkm-n denotes the block merge relationship of the mth block at the nth stage.
S3: the geological factor is taken as a second factor of flow velocity change, and the block divided by the first factor is further divided into a plurality of stages. Because the water seepage speeds of different geology are different, the speed of the same block in the flowing water converging process can also be changed. When the flow rate in each block is changed based on the data of the second element on the basis of the first element flow meter, the water collection capacity and the flow rate at the current moment of each block are calculated, and all calculation results are stored as the second element flow meter (concretely, the following table).
S4: and taking surrounding related facilities as a third element of the flow rate change, taking triggering construction as a condition, and further refining the second element flow meter. When flowing water is converged to peripheral drainage facilities, rivers and underground water, the blocks stop subsequent flowing water convergence, the current water collecting capacity and flow rate of each block are calculated under the condition of the triggering moment, and all calculation results are stored as regional static flow meters (specifically, the following tables).
S5: calculating and generating a regional dynamic flow velocity meter (specifically, a table below) according to factors such as air temperature, humidity and the like by taking an environmental factor as a fourth factor of flow velocity change;
s6: according to the total water flow flowing in, the distribution condition of each block in the current area is calculated by looking up a table: firstly, acquiring the environmental condition of the current area, and calculating the total water quantity affected by the environment according to the area dynamic flow rate meter:
V＝V0*f(t，h)
Wherein V 0 represents the total water input, t represents the current environmental temperature, h represents the current environment, and V is the calculated total water to be distributed
Searching a regional static flow meter according to the V value, referring to the stage water quantity in the table, finding out the corresponding water collecting stage i and stage water quantity V i, and calculating the water quantity V' to be distributed:
V′＝V0-V1
Determining the water capacity V in and the flow rate value S in of each block in the current catchment stage, and distributing the water quantity V' to be distributed into each block according to the flow rate value S in:
Vn＝Vin+V′*Sin
Calculate the water level H n from the water volume and ground data for each block:
Hn＝h(Vn,DEM)
wherein the DEM is a ground type file corresponding to the block.
S7: calculating the water distribution condition of each block in the current area according to the water surface height H of a certain area:
Searching a regional static flow table according to the block ID and the H value, referring to the stage heights in the table, and finding out the corresponding catchment stage i and stage height H i0, and a flow speed value S in;
Calculate the water collection margin V i0 within the block from the block profile and the height difference:
Vi0＝h(H-Hi0,DEM)
Wherein the DEM is a ground type file corresponding to the block
Calculate the water collection margin V i of the whole area from the flow rate value S in of the block:
Vi＝Vi0/SI0
Determining the water capacity V in and the flow rate value V in of the other blocks in the current catchment stage, and distributing the water quantity V i to be distributed into each block according to the flow rate value S in:
Vn＝Vin+Vi*Sin
calculate the water level H n from the water volume and ground data of the other blocks:
Hn＝h(Vn,DEM)
wherein the DEM is a ground type file corresponding to the block.
Taking rainfall inundation analysis of a low-lying hardened pavement at a place by the XX area of XX city and the emergency management agency:
And analyzing the DEM file of the current area, and dividing the current area into three low-lying areas K0, K1 and K2. Wherein K0 and K1 are combined at a submerged height 22.001 m and ponding is discharged from the side river at a submerged height 22.02 m; k2, K0 and K1 are combined to be 22.766 meters and 22.748 meters, and accumulated water of K2 at the submerged height of 22.61 meters is discharged from the side river.
Calculating the water collecting speed change stage of the flooding process according to the data to obtain the following table:
taking rainfall inundation analysis of a low-lying hardened pavement at a place by the XX area of XX city and the emergency management agency:
The DEM file of the current segment is analyzed, dividing the current segment into three low-lying areas K0, K1 and K2. Wherein K0 and K1 are combined at a submerged height 22.001 m and ponding is discharged from the side river at a submerged height 22.02 m; k2, K0 and K1 are combined to be 22.766 meters and 22.748 meters, and accumulated water of K2 at the submerged height of 22.61 meters is discharged from the side river.
Calculate the water collection rate change phase of the flooding process from the data, yielding the following table:
collecting field data, manufacturing a temperature and humidity-flow rate meter according to typical data of a strong rainfall period, and obtaining a calculation equation by using a curve fitting method:
| 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
| 70％ | 0.9364 | 0.9213 | 0.9208 | 0.9201 | 0.9187 | 0.9165 | 0.9148 | 0.9121 |
| 80％ | 0.9583 | 0.9575 | 0.957 | 0.9563 | 0.9548 | 0.9525 | 0.9508 | 0.9479 |
| 90％ | 0.9732 | 0.9724 | 0.9719 | 0.9712 | 0.9697 | 0.9674 | 0.9656 | 0.9627 |
calculate 10000 cubic meters of water distribution at 90% humidity, 23 degrees celsius. The result is obtained according to the calculation flow of S6:
| ID | H | V |
| K0 | 21.9184 | 2034.41 |
| K1 | 22.001 | 5130.85 |
| K2 | 22.0825 | 2566.73 |
calculating the water distribution of the whole area when the maximum submerged depth of K0 is 1.5 meters. The result is obtained according to the calculation flow of S7:
| ID | H | V |
| K0 | 21.1152 | 232.45 |
| K1 | 21.3565 | 1083.89 |
| K2 | 21.6232 | 471.53 |
。
According to the rapid generation method of the running water distribution based on the flow velocity change, provided by the invention, more parameters are introduced into a calculation model for calculating the water distribution by analyzing the factors influencing the total water quantity and the factors influencing the running water distribution, so that the calculation precision of the model is improved, and the use environment is enriched; meanwhile, by a method of separating static factors and dynamic factors, the calculation process of the static influence factors is stored in a mode of an intermediate database, and calculation is carried out by inquiring the database in the subsequent process, so that repeated calculation of complicated ground type and running water processes is avoided, and the calculation speed in the application process is greatly improved. The invention can rapidly obtain the distribution condition of the flowing water, and solves the problem that the distribution condition of the flowing water cannot be rapidly obtained in the actual use process. The method provided by the invention can be applied to a computer program.
Claims (3)
1. The rapid flow distribution generation method based on the flow velocity change is characterized by comprising the following steps of:
S1: by analyzing the geographical environment data of the target area, several factors influencing the current water flow collection speed change are found out, wherein the factors comprise topography factors, geological factors, environmental factors and surrounding related facility factors;
s2: taking the topography factors as first factors for flow rate change, dividing a target area into a plurality of blocks according to different flow rates, calculating the catchment capacity and the flow rate of each block at the current moment according to the data of the first factors when the flow rates of the blocks change, and storing all calculation results as a first factor flow database;
S3: the geological factors are used as second factors for flow rate change, the blocks divided by the first factors are further divided into a plurality of stages, on the basis of the first factor flow database, when the flow rate in each block changes according to the data of the second factors, the water collecting capacity and the flow rate of each block at the current moment are calculated, and all calculation results are stored as a second factor flow database;
S4, taking the related facilities around as a third element of flow velocity change, taking triggering construction as a condition, further refining the second element flow database, stopping subsequent flow convergence by the blocks when the flow is converged to the drainage facilities around, the river and the underground water, calculating the current water collecting capacity and the flow velocity of each block by taking the triggering moment as a condition, and storing all calculation results as a regional static flow database;
s5, taking the environmental factors as fourth factors of flow rate change, and calculating and generating a regional dynamic flow rate database according to air temperature and humidity factors;
S6, calculating the distribution condition of each block of the water flow in the current area according to an inflow total water quantity query database, wherein the database comprises at least one of a first flow factor database, a second flow factor database and an area dynamic flow rate database;
the distribution condition comprises total water quantity to be distributed, water quantity to be distributed and water surface height;
The step S6 specifically comprises the following steps:
S6.1, acquiring the environmental condition of the current area, calculating the total water quantity affected by the environment according to the dynamic flow rate database of the area,
V＝V0*f(t，h)
Wherein V 0 represents the input total water quantity, t represents the current environment temperature, h represents the current environment, and V is the calculated total water quantity to be distributed;
S6.2, searching the regional static flow database according to the V value, referring to the stage water quantity of the regional static flow database, finding out the corresponding water collecting stage i and stage water quantity V i, and calculating the water quantity V 'to be distributed'
V′＝V0-Vi；
S6.3, determining the water capacity V in and the flow rate value S in of each block in the current water collecting stage, and distributing the water quantity V' to be distributed into each block according to the flow rate value S in
Vn＝Vin+V′*Sin
S6.4, calculating the water surface height H according to the water quantity and the ground type data of each block n
Hn＝h(Vn,DEM)
Wherein the DEM is a ground type file corresponding to the block.
2. The rapid flow distribution generation method based on flow velocity variation according to claim 1, which is characterized by comprising the step S7 of calculating the water distribution condition of each block in a current area according to the water surface height of the certain area.
3. The method for rapidly generating a flow distribution based on a flow velocity variation according to claim 2, wherein the method of S7 is as follows:
Searching the regional static flow database according to the block ID and the H value, referring to the stage height in the regional static flow database, and finding out the corresponding water collecting stage i and stage height H i0, and a flow speed value S in;
Calculating the water collecting allowance in the block according to the ground file and the height difference of the block
Vi0＝h(H-Hi0,DEM)
Wherein D;
Calculating the water collecting allowance V i of the whole area according to the flow rate value S in of the block:
Vi＝Vi0/Si0
Determining the water capacity V in and the flow rate value V in of other blocks in the current catchment stage, and distributing the water quantity V i to be distributed into each block according to the flow rate value S in
Vn＝Vin+Vi*Sin；
Calculating the water surface height H according to the water volume and the ground data of other blocks n
Hn＝h(Vn,DEM)
Wherein the DEM is a ground type file corresponding to the block.
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