CN111350161A - Method for controlling boundary through estuary and coast model test - Google Patents
Method for controlling boundary through estuary and coast model test Download PDFInfo
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Abstract
The invention provides a method for controlling a boundary by a estuary and coast model test, which needs to research a plurality of hydrological conditions according to research needs, wherein different hydrological conditions have different test control boundary parameters. In the past, each test hydrological condition needs to perform time-consuming and labor-consuming control boundary parameter adjustment work. According to the method, after a group of control boundary parameters are obtained on the basis of first model calibration, an effective and quick method is summarized and designed through means such as correlation analysis and the like, model control boundaries under different hydrological conditions are calculated, and the efficiency of a model test is greatly improved. The method is successfully applied to key projects in multiple countries, and research results meet the requirements of relevant specifications.
Description
Technical Field
The invention relates to a method for controlling a boundary by a estuary coast model test, belonging to the technical field of estuary coast physical model test model control.
Background
The similarity theory is an important theoretical basis for experimental research of physical models. In 1686, Newton proposes a general law of similar power, and lays a theoretical foundation for a physical model test. Since then, river work is becoming more prosperous, and the first tidal estuary model in China was established by Nanjing research institute of hydrology in 1956. Researching the rules of river mouth and coast tidal wave propagation, flow velocity distribution, water and sand spatial and temporal distribution, river bed erosion and the like through a river model and the like; through each stage of engineering design, the effect and influence of the engineering scheme are analyzed and researched by using the model, and technical support is provided for scheme optimization comparison and selection, scheme design and scheme implementation opportunity. In China, physical model tests are successfully applied in researches of three gorges engineering, deep-water channel treatment below Nanjing of Yangtze river, Sutong Yangtze river bridge, Shanghai Yangtze river bridge, high-speed rail Yangtze river bridge, HongZhu Australian bridge and the like, and powerful support is provided for national economic construction.
Model experiments are based on similar theories, including: geometric similarity, motion similarity, power similarity, and the like. Similar phenomena follow the same law of motion and are described by the same mathematical physical expression. Therefore, the relationship between the physical scales must be constrained by these expressions and cannot be arbitrarily selected. The accuracy of the model is checked by model verification.
For the estuary and coast model, the model test can be divided into three steps of model calibration, verification and scheme test. Firstly, model calibration is carried out after model manufacturing and measurement and control system installation are finished. The calibration and verification are carried out by selecting actually measured data, about 2-4 groups, a representative hydrological condition is selected for calibration, relevant technical parameters of the model are calibrated by adjusting the model roughness, correcting the local terrain of the model, debugging a measurement and control system and other technical means, and meanwhile calibrated model boundary control parameters are obtained. Calibration work is large and often takes half a month, 1 month or even more. And secondly, verifying the similarity of the models by using other hydrological conditions, and obtaining corresponding model control parameters after the verification is successful, wherein the workload is relatively small, but the time is usually at least 1 week. And thirdly, after verification is finished, carrying out scheme test research through the model, selecting representative hydrological conditions for testing according to needs, wherein the representative hydrological conditions mainly comprise flood tide, dry tide, flood tide, storm tide and the like, and selecting average flow tide, 20-year-one-flow tide, 100-year-one-flow tide and 300-year-one-tide according to navigation and bridge construction. The boundary control parameters of these test conditions are often at least 1 week long, and only the control parameters may be generalized.
The open boundary of the estuary coast model is usually controlled by adopting a tidal level boundary condition, and the control boundary can also be different in different models or the same model but with different runoff and tidal current. Therefore, each set of hydrological conditions has different control boundary parameters.
Practice shows that the selection of the boundary control parameters is an important and time-consuming and labor-consuming work in the model test, an ideal control boundary can be obtained through long-time and multiple attempts in the test process, the efficiency of the river model test is influenced, and the method is not suitable for social and economic aspects of high-speed development at the present stage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for controlling the boundary of the estuary coast model test, which can quickly select the model control boundary and provide a test control boundary forecasting model capable of matching various former water conditions and the future actual measurement water conditions.
The invention provides a method for controlling a boundary by a estuary coast model test, wherein the model control boundary is a curve formed by a group of parameters at different moments, and the method comprises the following steps:
firstly, calibrating the similarity of the model according to the actually measured hydrological data. Modifying a lower boundary control curve of the model by debugging a model modification and measurement and control system until a model verification result meets the standard requirement of 'coast and estuary tide sediment simulation technical specification' (JTST231-2-2010), and obtaining a group of model boundary control parameter curves corresponding to the natural actual measurement curves;
secondly, comparing the calibrated model boundary control parameter curve with the corresponding natural actual measurement curve, and finding that the parameter size and the phase between the two curves are different, which indicates that the actual measurement data can not be directly used as the model boundary control parameter, so that the control boundary parameters of other test conditions need to be subjected to time-consuming and labor-consuming control boundary parameter adjustment again;
thirdly, comparing the relation between the control boundary parameters obtained in the calibration test and the actually measured data curve on the basis of successful model calibration, analyzing the difference between the maximum value and the minimum value of the actually measured curve and the model boundary control parameter curve, and obtaining a tidal range ratio a between the two curves by calling the difference between the maximum value and the minimum value of the curve as the tidal range;
fourthly, continuously analyzing the time of occurrence of the maximum value and the minimum value of the natural actual measurement curve and the model boundary control parameter curve to obtain the phase difference t between the two curves;
fifthly, obtaining an algorithm reflecting the relation between the original tide level data and the model tide level control parameter according to the parameters of the maximum value, the minimum value, the tide difference ratio a, the phase difference t and the like between the two curves, wherein the algorithm is shown as the following formula,
Zi＝a1Pi-1+a2Pi+c
in the formula, ZiRepresenting the calculated value of the control parameter at time i in the boundary control parameter curve of the model, Pi-1Represents the measured tide level value, P, at the time of i-1 in the naturally measured tide level curveiRepresents the measured tide level value at the moment i in the natural measured tide level curve, i represents the moment a1、a2All are coefficients, c is a constant;
and sixthly, determining control parameter curves of other tests of the model according to the algorithm in the fifth step, reducing the number of groups of model verification tests, saving a large amount of time-consuming and labor-consuming test control boundary parameter adjustment work, and greatly improving the model test efficiency.
By adopting the method, firstly, calibration and verification tests are carried out according to the actually measured hydrological data multi-model so as to ensure the similarity of the model and a prototype. In the process of the calibration test, measures such as debugging and modifying the model tide level control boundary are taken for many times until the similarity of the model tide level and the natural tide level meets the relevant specification requirements, which is the part with the largest workload in the model verification. After the model calibration is successful, a set of model control boundary parameters corresponding to the measured curve is obtained. Because the two curves have detailed difference, other actually measured curves cannot be directly used as model boundary control parameter curves. The boundary control parameter curves of other test conditions are obtained by using a test with time and labor waste, and the curves to be verified have verification of a plurality of groups (such as flood tide, dry tide, flood tide and dry tide); meanwhile, the hydrological conditions required by the formal test are also multiple groups, so that the number of control boundary parameter curves determined according to the test is 3 or 4 in a small number, and the number of the control boundary parameter curves is more than 10 in a large number, so that the selection of the control boundary is a tedious and necessary work. The core of the invention is that the relation between the control boundary meeting the specification requirement and the adjacent measured tide level is analyzed, and an effective and quick method is summarized and designed by means of model similarity, data interpolation, correlation analysis and the like, so as to calculate the model control boundary under different hydrological conditions. On the basis of successful model calibration, the verification test of more than 1 week can be completed within 1-2 days, so that the model test efficiency is greatly improved; the scheme test control curve parameters determined in more than 1 week can be obtained immediately according to an algorithm.
As a further technical solution of the present invention, it is described in detail as follows:
in the first step, according to a first group of actually measured hydrological data, generally a tide level curve consisting of astronomical tide and 25-hour data, calibrating the model by adjusting data such as model roughness, boundary control parameters and the like; after the model calibration is successful, the model roughness is determined, the model is similar to the prototype, and a group of test control parameters, namely a model boundary control parameter curve corresponding to the actually measured hydrological data, can be obtained. Next, the curve is compared with the actually measured curve, and an attempt is made to analyze the relationship between the two curves, so as to save the time-consuming and labor-consuming adjustment work of the boundary control parameters, and directly calculate other boundary control parameter curves through an algorithm.
In the second step, the relation between the model boundary control parameter curve obtained in the calibration test and the actually measured curve is compared, and the fact that the maximum value, the minimum value and the phase position of the two curves are different due to the fact that a model control system has a process of responding to a control command formed by control curve parameters and the model boundary is inconsistent with the position of the actually measured station is found; this indicates that the model boundary control parameter curves of other hydrological conditions need to be re-adjusted to control the boundary parameters for use.
In the third step, the maximum value and the minimum value of the two curves are firstly analyzed, and the maximum value and the minimum value of the natural measured curve of the tide level station adjacent to the boundary are respectively marked as Pmax、PminThe maximum value and the minimum value of the model boundary control parameter curve obtained by calibration are respectively recorded as Mmax、MminThe tidal range ratio a between the two curves is calculated according to the following formula:
a＝(Mmax-Mmin)/(Pmax-Pmin)；
after analyzing the maximum value and the minimum value of the two curves, finding the actually measured tide level value P at the moment iiAnd tidal level calculation Z of boundary control parameter curveiThe following relationships exist:
Zi＝(Mmax-Mmin)/(Pmax-Pmin)×(Pi-Pmin)+Mmin(1)
in the formula, ZiTidal level calculation, P, representing a curve of a boundary control parameteriRepresenting the tide level value at time i, P, in a naturally measured tide level curvemax、PminRespectively representing the maximum and minimum values, M, of the naturally measured tide level curves of the tide level stations adjacent the boundarymax、MminRespectively representing the maximum value and the minimum value of the model boundary control parameter curve obtained by calibration;
p in the naturally measured curvemax、PminIs a constant value, in a calibrated model boundary control parameter curve, Mmax、MminIs also constant, and since a ═ Mmax-Mmin)/(Pmax-Pmin) Then, the above equation is simplified as:
Zi＝a(Pi-Pmin)+Mmin(2)
after calculation processing, the maximum value and the minimum value of the actually measured curve and the control parameter curve obtained by calibration are consistent, but phase difference exists, and phase difference correction is needed.
In the fourth step, the maximum value P of the natural actual measurement curve and the model boundary control parameter curve is respectively analyzedmaxAnd MmaxTime difference of occurrence Tmax differenceMinimum value PminAnd MminTime difference of occurrence TDifference in minDiscovery of Tmax differenceAnd TDifference in minThe phase difference is not large, the two are averaged to obtain the phase difference of the two curves,
t＝(Tmax difference+TDifference in min)/2 (3)
In the formula, t represents the phase difference between the natural measured curve and the model boundary control parameter control curve;
if t is 0, the two curves coincide, if t < 0, the phase of the natural measured curve is leading, and if t > 0, the phase of the natural measured curve is trailing. In the actual model test process, the t value is generally between-1 and 0 due to the requirement of model test control precision.
And in the fifth step, after the data size relation a and the phase difference t between the two curves are determined, a calculation formula of parameters in the boundary control parameter curve is deduced. Considering that the two curves now only have a phase difference t, then Z at time iiPositive value and P at time i + ti+tEqual, i.e.:
Zi＝Pi+t(4)
in the formula, ZiA calculated value, P, representing the model boundary control parameter curve at time ii+tRepresenting the actually measured tide level value of the naturally measured curve at the moment i-t;
since i + t is not necessarily an integer, then Pi+tThe value of (4) is between the data of two integer points, the value can be interpolated, and the value is taken as (4) after interpolation, and the following results are obtained:
Zi＝(int(t+1)-t)Pi+(t-int(t))Pi-1(5)
combining the formula (2) of the third step and the formula (5) of the fifth step, there are:
Zi＝(a(Pi-Pmin)+Mmin+(int(t+1)-t)Pi+(t-int(t))Pi-1)/2 (6)
simplifying the equation, then:
Zi＝(t-int(t))/2Pi-1+(a+int(t+1)-t))/2Pi+(Mmin-aPmin)/2
let a1＝(t-int(t))/2,a2＝(a+int(t+1)-t))/2,c＝(Mmin-aPmin) And/2, further simplifying the formula (6) to obtain a required model boundary control parameter calculation formula:
Zi＝a1Pi-1+a2Pi+c (7)
in the formula, ZiA calculated value of the control parameter, P, indicating time iiAnd (3) representing the actually measured tide level value at the moment i in the naturally measured tide level curve, wherein the moment i represents the moment, and other parameters are the same as those in the previous step.
From the above, a1、a2The value calculation formula for c is as follows:
a1＝(t-int(t))/2
a2＝(a+int(t+1)-t)/2
c＝(Mmin-aPmin)/2
wherein t is the phase difference between the two curves, a is the tidal range ratio between the two curves, MminFor the minimum value, P, of the calibrated model boundary control parameter curveminIs the minimum of the naturally observed curve.
After the model is calibrated to determine the model boundary control parameter curve, the calculation value of the control parameter at each moment can be calculated according to the formula (7), so that a large amount of time-consuming and labor-consuming test parameter curve adjustment processes are saved.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
(1) the invention provides a method for calculating a control boundary of a estuary coast physical model;
(2) according to the method provided by the invention, the physical model test control boundary under the hydrological conditions of model verification and model test can be rapidly calculated;
(3) the method provided by the invention can be used for calculating the control boundary of the moving bed physical model without utilizing a generalized control curve;
(4) through the method, the traditional model verification within 1 week to half month can be completed within 1 to 2 days, and the short 1 week test curve determination work can be determined immediately through calculation, so that the working time is greatly shortened.
According to the research requirements, the invention needs to research a plurality of hydrological conditions, and different hydrological conditions have different test control boundary parameters. In the past, each test hydrological condition needs to perform time-consuming and labor-consuming control boundary parameter adjustment work. According to the method, after a group of control boundary parameters are obtained on the basis of first model calibration, an effective and quick method is summarized and designed through means such as correlation analysis and the like, model control boundaries under different hydrological conditions are calculated, and the efficiency of a model test is greatly improved. The method is successfully applied to key projects in multiple countries, and research results meet the requirements of relevant specifications.
Drawings
FIG. 1 is a flow chart of a method for controlling boundaries in a estuary coast model test according to the present invention.
FIG. 2 is a comparison graph of the Yangtze river estuary section model calibration control curve and the actual measured Wurimengkou station tide level process line in the present invention.
Figure 3 is a comparison of the wurime mouth tide level at the estuary section of the Yangtze river of the present invention with calculated control parameters.
FIG. 4 is a probability control curve and a calculation control curve of the model moving bed model of the Yangtze river estuary section.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the accompanying drawings. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
As shown in fig. 1, the method for controlling the boundary by the estuary coast model test of the present invention comprises the following steps:
(1) after the model making and measuring and controlling system is installed, the model calibration is started according to the hydrological conditions of the first group of verification tests, and the initial boundary control parameter curve can adopt an adjacent actually measured water level station curve (called an actually measured curve for short). Comparing the data simulated by the model with the data actually measured naturally, debugging a model correction and measurement and control system, and modifying a lower boundary control curve of the model until a model calibration result meets the requirements of the technical specification of coast and estuary tide sediment simulation (JTST231-2-2010), so that the calibration is successful.
(2) After the calibration is successful, a group of model boundary control parameter curves is obtained, the relationship between the model boundary control parameter curves and the actually measured curves is compared, the data comparison is shown in a table 1, and the graph comparison is shown in the table 1. As can be seen from the graph, the phase difference exists between the two curves, and the maximum value and the minimum value also have a difference, so the measured data cannot be directly used as the control parameter of the model boundary.
(3) And analyzing the difference between the maximum value and the minimum value of each curve, wherein the term is called tidal range in the estuary coastal model, and calculating to obtain the ratio a of the tidal ranges of the two curves.
(4) The time difference of the average tide level of the two curves is compared by a graph method, and the time difference can be used as the phase difference between the two curves to obtain the phase difference t.
(5) Through the analysis of the tidal range ratio a and the phase difference t, a calculation formula of the control curve parameters is obtained:
Zi＝a1Pi-1+a2Pi+c (7)
in the formula: zi-calculating a control parameter at time i in units: m;
Pi-the value at time i in the measured tide level curve, in units: m;
i-time, unit: hours;
a1、a2-coefficient, a1＝(t-int(t))/2，a2＝(a+int(t+1)-t)/2；
a-two curve tidal range ratio, a ═(Mmax-Mmin)/(Pmax-Pmin)
c-constant, c ═ Mmin-aPmin)/2
Pmax、Pmin-measuring the maximum and minimum values of the tide level curve of the tide level station adjacent to the boundary in units of: m;
Mmax、Mmin-calibrating the maximum and minimum values of the obtained model control boundary parameter curve, unit: and m is selected.
(6) And calculating the control boundary of the model test according to the calculation formula. The measured tidal level curves of adjacent tidal level stations under each hydrological condition are calculated by relevant hydrological analysis. The general test conditions are 8 groups or more, and the workload of 1 week can be determined immediately by the calculation method of the invention.
The method of the invention has been successfully applied to a model of the mouth of the Changjiang river, a Bengal PAYRA power plant and a physical model of the Changtai Yangtze river bridge in the national stress laboratory Nanjing Water conservancy science research institute.
Example 1
In this embodiment, a south-branch control boundary parameter curve of the long river is calculated by taking a mouth section model of the long river in a national key laboratory as an example.
The model of the national key laboratory, the long river estuary section, is located in the iron core bridge base of Nanjing water conservancy science research institute, and belongs to the national key laboratory of hydrology water resource and water conservancy engineering science. The model is about 300m long, which is equivalent to 190km in nature. The model has a horizontal scale of 655 and a vertical scale of 100. The estuary is a medium-strength tidal estuary, the upstream is provided with runoff letdown, and the lower boundary of the model is controlled by tide. The model of the embodiment is built in 2005, and in 2017, upgrading and transformation are needed due to the special research and development of national major instrument development. After transformation, the control boundary including the lower boundary of the Wurimen mouth needs calibration and verification, and the control boundaries of all verification hydrological conditions and test hydrological conditions are provided.
This time verifies that there are 3 groups of hydrologic conditions, and the downstream wurimengkou boundary needs to provide 6 groups of control boundaries:
(1) actually measure hydrological data, big and small in 2015 9 monthsAnd (5) wetting. The average flow rate in the measurement period is 30000m3/s。
(2) Hydrological data, big tide and small tide are actually measured in 8 months in 2018, and the average flow in the measuring period is 37780m3/s。
(3) Hydrological data, tide and tide are actually measured in 6 months in 2019, and the average flow in the measuring period is 46000m3/s。
The test hydrological conditions comprise two groups of fixed bed test hydrological conditions and moving bed test hydrological conditions:
(1) fixed bed test hydrological condition 6 groups: dry season heavy tide, flood season heavy tide, 97 storm tide, 98 flood heavy tide, 20-year one-time flow heavy tide, 100-year one-time flow heavy tide and 300-year one-time flow heavy tide; the upstream flow rates were 16500m3/s、56800m3/s、45500m3/s、85000m3/s、85000m3/s、96000m3S and 100400m3The downstream boundary has difference due to different upstream flow and different downstream tide intensity;
(2) moving bed test hydrographic conditions 5 groups: the normal water-sand year, the 2010 water-rich year, the 100-year-one flow process year, the 300-year-one flow process year and a plurality of consecutive hydrological years; the upstream flow is a corresponding or optimized annual flow process and the downstream boundary is a matching tidal level process.
In summary, the trial control curves required to be provided for the rime mouth boundary totaled 17 groups.
(1) Completing the installation of the model making and measuring and controlling system, adopting 2015 to actually measure the hydrological data model calibration in 9 months, wherein the upstream runoff is 30000m during the measuring period3And/s, the Wurime mouth tide station is about 2.0m away from the control boundary. The control was first performed according to the water level of the measured water level station curve (simply "measured curve") of the adjacent rime mouth station, which was about 2.0m from the control boundary. And comparing the data simulated by the model with the data actually measured naturally, debugging a model correction and measurement and control system, modifying a lower boundary control curve of the model until the model verification result meets the requirements of the technical specification of coast and estuary tide sediment simulation (JTST231-2-2010), and completing the calibration test.
(2) After the calibration test was completed, a boundary control parameter curve of the rime mouth model and an actually measured tide level process line of the rime mouth station were obtained, and the comparison results of the two are shown in fig. 2, and the data list is shown in table 1. As can be seen from FIG. 2, there is a difference between the two curves, which indicates that in this model, the final model control boundary cannot be directly used for control by the actual station or the existing curve.
TABLE 1 model calibration control Curve and actual data of Wurimen mouth station tide level procedure
(3) According to the data in the table above, there are:
Pmax＝2.33，Pmin＝-0.68，Mmax＝2.31，Mmin-0.35, then:
a＝(Mmax-Mmin)/(Pmax-Pmin)＝0.884。
(4) using a graphical method, the time difference between the two curves was measured to obtain the phase difference, which was-0.33 hours.
(5) The coefficients and constants in equation (7) are calculated from the data.
a1＝(t-int(t))/2＝(-0.33-int(-0.33))/2＝0.335
a2＝(a+int(t+1)-t)/2＝(0.884+int(-0.33+1)+0.33)/2＝0.607
c＝(Mmin-aPmin)/2＝(-0.347+0.884×0.68)/2＝0.13
Then, equation (7) can be written as:
Zi＝0.335Pi-1+0.607Pi+0.13
the formula is the formula for calculating the model boundary control parameters of the Yangtze river estuary section. According to different Wurime mouth tide level process curve values P under different test conditionsiThe curve is provided by natural actual measurement or mathematical model calculation, and a control parameter curve of a lower boundary model of the corresponding model can be calculated and obtained, and the control parameter curve is shown in figure 3.
In the same way, a boundary control parameter curve under the moving bed model test can be obtained, the calculated ordinary water and sand year runoff control parameter curve is shown in figure 4, and generalized curve parameters in the figure are control curves which are not calculated by a formula before the model is modified.
After the model is verified and the test control parameters of the fixed bed model and the moving bed model are determined, a plurality of researches on important scientific and technological projects such as national major specialties, water conservancy and traffic are carried out. Mainly comprises the following steps:
(1) transportation construction science and technology project (201132874660): the key technical researches on the governance of the Yangtze river Fujiang sand, Tongzhou sand and white anchored sand deepwater channel system;
(2) special development of national significant science instruments and equipment (2011YQ 070055): developing an intelligent measurement and control system for a large river model test in China;
(3) national 863 program (2012AA 112508): research on a tide branch river section deepwater channel renovation technology;
(4) jiangsu province water conservancy project (2015004): researching the river course evolution law and comprehensive treatment key technology of Yangtze river Jiangsu section in a changing environment;
(5) first-stage engineering and second-stage engineering of a deep-water channel improvement engineering of 12.5 meters below Nanjing of Yangtze river; a comprehensive treatment project of the Yangtze river clear river reach;
(6) shanghai Changjiang river bridge, Changtai Changjiang river bridge, Yantai stannum bridge or tunnel engineering, such as Yangtze river channel, natural gas river channel in China and natural gas river channel in North Yangtze river channel.
Claims (6)
1. A method for controlling a boundary by a estuary coast model test is characterized by comprising the following steps:
firstly, calibrating the similarity of a model according to measured hydrological data, modifying a lower boundary control curve of the model by debugging a model modification and measurement and control system until a model verification result meets the standard requirement of coast and estuary tide sediment simulation technical specification (JTST231-2-2010), and obtaining a group of model boundary control parameter curves corresponding to a natural measured curve;
secondly, comparing the calibrated model boundary control parameter curve with a corresponding natural actual measurement curve;
thirdly, analyzing the difference between the maximum value and the minimum value of the natural measured curve and the model boundary control parameter curve, and obtaining a tidal range ratio a between the two curves by using the difference between the maximum value and the minimum value as the tidal range;
fourthly, by analyzing the time of occurrence of the maximum value and the minimum value of the natural actual measurement curve and the model boundary control parameter curve, the phase difference t between the two curves can be obtained;
fifthly, obtaining an algorithm reflecting the relation between the original tide level data and the model tide level control parameter according to the maximum value, the minimum value, the tide difference ratio a and the phase difference t between the two curves, wherein the algorithm is shown as the following formula,
Zi＝a1Pi-1+a2Pi+c
in the formula, ZiRepresenting the calculated value of the control parameter at time i in the boundary control parameter curve of the model, Pi-1Represents the measured tide level value, P, at the time of i-1 in the naturally measured curveiRepresents the measured tide level value at the moment i, i represents the moment a in the natural measured curve1、a2All are coefficients, c is a constant;
and sixthly, determining control parameter curves of other tests according to the algorithm of the fifth step, and then carrying out model tests.
2. The method for controlling the boundary of the estuary and coast model test as claimed in claim 1, wherein in the first step, the model is calibrated by adjusting the roughness of the model and the boundary control parameters according to a set of measured hydrological data; after the model calibration is successful, the model roughness is determined, the model is similar to the prototype, and a group of test control parameters are obtained.
3. The method of claim 1, wherein in the second step, the relationship between the control parameter curve of the model boundary obtained in the calibration test and the measured curve is compared, and the maximum value, the minimum value and the phase of the two curves are different due to a process of the model control system responding to the control command formed by the parameters of the control curve and the position of the model boundary and the measured station are not consistent.
4. The method for controlling the boundary of the estuary coast model test as claimed in claim 1, wherein in the third step, the maximum and minimum values of the two curves are analyzed, and the maximum and minimum values of the naturally measured curve of the tide level station adjacent to the boundary are respectively marked as Pmax、PminThe maximum value and the minimum value of the model boundary control parameter curve obtained by calibration are respectively recorded as Mmax、MminCalculating the tidal range ratio a between the two curves according to the following formula,
a＝(Mmax-Mmin)/(Pmax-Pmin)。
5. the method for testing the control boundary of the estuary coast model according to claim 1, wherein in the fourth step, the maximum value P of the naturally measured curve and the model boundary control parameter curve is analyzed respectivelymaxAnd MmaxTime difference of occurrence Tmax differenceMinimum value PminAnd MminTime difference of occurrence TDifference in minThe phase difference between the two curves can be obtained,
t＝(Tmax difference+TDifference in min)/2
In the formula, t represents the phase difference between the natural measured curve and the model boundary control parameter control curve;
if t is 0, the two curves coincide, if t < 0, the phase of the natural measured curve is leading, and if t > 0, the phase of the natural measured curve is trailing.
6. The method of claim 1, wherein in the fifth step, a is calculated by the following formula1、a2And the value of c,
a1＝(t-int(t))/2
a2＝(a+int(t+1)-t)/2
c＝(Mmin-aPmin)/2
wherein t is the phase difference between the two curves, a is the tidal range ratio between the two curves, MminModel boundary control parameters obtained for calibrationMinimum value of the curve, PminIs the minimum of the naturally observed curve.
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| KR20090111976A (en) * | 2008-04-23 | 2009-10-28 | 재단법인서울대학교산학협력재단 | Method for identifying uncertainty in fitting rating curve with bayesian regression |
| CN105701066A (en) * | 2016-03-08 | 2016-06-22 | 广东省水利水电科学研究院 | Estuary-tidal-range fast prediction method |
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| CN108829986A (en) * | 2018-06-22 | 2018-11-16 | 中国水利水电科学研究院 | Method is determined based on the similar hydrological experiment model scale of energy process |
| CN110442997A (en) * | 2019-08-14 | 2019-11-12 | 中交（天津）生态环保设计研究院有限公司 | It is a kind of for instructing the river mouth waters range demarcation method of river mouth habitat betterment works |
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| KR20090111976A (en) * | 2008-04-23 | 2009-10-28 | 재단법인서울대학교산학협력재단 | Method for identifying uncertainty in fitting rating curve with bayesian regression |
| CN105701066A (en) * | 2016-03-08 | 2016-06-22 | 广东省水利水电科学研究院 | Estuary-tidal-range fast prediction method |
| CN108104052A (en) * | 2017-12-11 | 2018-06-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Tidal reach tributary inlet door ejectment water hinge entirety fluid flowing model test method |
| CN108829986A (en) * | 2018-06-22 | 2018-11-16 | 中国水利水电科学研究院 | Method is determined based on the similar hydrological experiment model scale of energy process |
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