CN1828232A - Two-line energy slope flow rate metering method - Google Patents

Two-line energy slope flow rate metering method Download PDF

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CN1828232A
CN1828232A CN 200610072431 CN200610072431A CN1828232A CN 1828232 A CN1828232 A CN 1828232A CN 200610072431 CN200610072431 CN 200610072431 CN 200610072431 A CN200610072431 A CN 200610072431A CN 1828232 A CN1828232 A CN 1828232A
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李佳宾
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Abstract

The related measuring method comprises: selecting two or more vertical line positions to measure the vertical flow rate and inverse obtain opposite energy grades by the vertical flow model; processing with numerical method to the energy grade; selecting some vertical lines on river section to obtain opposite vertical flow rate by former energy grade and model; finally, obtaining the flow rate by partial flow area method. This invention simplifies measurement, improves precision, and provides condition to flow measurement automation.

Description

Two-line energy slope flow rate metering method
Technical field
The present invention relates to a kind of two-line energy slope flow rate metering method, particularly a kind of two-line energy slope flow rate metering method that is applicable to metering rivers, open channel flow rate.
Background technology
Traditional flow rate metering method is that width of the channel is measured many (decide on river width, minimum be no less than five) vertical velocities with current meter on water-carrying section along the river, obtains flow with part flow velocity area-method then.This method is widely used in the flow metering of natural river course, and its operation process is called flow measurement.
Natural river course runs into diluvial the time, flow velocity is big, floating thing is many, the current meter hydrometry can't be implemented, and this moment, buoy method commonly used replaced, but because buoy not only often rolls up and down in the river course, about go around, also the phenomenon that a plurality of buoys are extruded into the Zhong Hong district can appear, and the buoy method measured is up and down than the section mean flow rate that falls between the section, is not the actual flow velocity of gaging section, so precision is not high.When running into extraodinary flood, can also adopt slope-area method as alternative scheme, but owing to be not easy to measure accurately than falling, so ratio of precision buoy method is poorer.In addition, in open channel, in the time of the lock buildings of weir, also can adopt hydraulic formula to calculate.
In recent years, external sonar current measured technology development is very fast, variety classeses such as boating type, horizontal ADCP are arranged, also has time difference method acoustic flow measurement instrument, electromagnetism, radar type current meter etc. are compared advanced technology with traditional current meter, the flow measurement time is short, but price is more many than traditional mechanical type current meter costliness.In the region of no relief river course of per second below 3 meters, effect is good at U-shaped riverbed and flow velocity for boating type ADCP, and shortcoming is to realize real-time online, and silt content should be less than 5 kilograms/cubic metre simultaneously.Horizontal ADCP and time difference method current meter principle are similar, be characterized in recording earlier one " index flow velocity ", set up correlationship with cross-sectional flow afterwards, method is quick, can realize real-time online, but have the shortcoming of relation line cycle Time Created length and high water extension.
Summary of the invention
The object of the present invention is to provide a kind of two-line energy slope flow rate metering method,, set up a kind of new flow measurement model, be used in combination on-mechanical formula current meter, form real-time online robotization flow measurement according to traditional vertical velocity flow measurement method and principle.
The object of the present invention is to provide a kind of two-line energy slope flow rate metering method, adopt packaged type equipment, respectively measure the flow velocity of a vertical line at left and right bank, calculate flow with two-line energy slope method model again, the cost of single section current measuring instrument equipment is dropped to minimum, the solution personnel garrison section and facility anti-theft security problem simultaneously.
To achieve these goals, the invention provides a kind of two-line energy slope flow rate metering method, be applicable to the flow of metering rivers, open channel, it is characterized in that, may further comprise the steps:
A. determine the position C1 and the C2 of two testing vertical lines, promptly on river cross-section, select two position C1 and C2 that carry out the vertical line of fluid-velocity survey;
B. utilize current meter to measure vertical velocity V1, the V2 of corresponding above-mentioned two vertical line position C1, C2 respectively;
C. utilize that the vertical velocity model is reverse to be obtained corresponding to the sloping S1 of the energy of above-mentioned V1 with corresponding to the sloping S2 of the energy of V2, obtaining thus initially can slope difference Δ S0, Δ S0=S1-S2;
D. when river water level changes, repeat above-mentioned steps B and C, obtain vertical velocity V1 ', the V2 ' of correspondence two vertical line position C1, the C2 of this moment, and corresponding to the sloping S1 ' of the energy of V1 ' with corresponding to the sloping S2 ' of the energy of V2 ', obtain energy slope difference Δ S thus, Δ S=S1 '-(S2 '+Δ S0);
E. select some vertical lines on river cross-section, on the vertical line between vertical line position C1 and the C2, by can sloping S1 ', S2 ' and can slope difference Δ S, that adopts that approach based on linear interpolation obtains each vertical line can be sloping; The vertical line of vertical line position C1 and C2 both sides can be taken as S1 ' or S2 ' respectively in the slope, promptly this vertical profile line of vertical line position C1 can be taken as S1 ' in the slope, this vertical profile line of vertical line position C2 can be taken as S2 ' in the slope; Energy on each vertical line that utilization obtains is sloping, obtains the vertical velocity of each vertical line by the vertical velocity model;
F. utilize the vertical velocity of each vertical line that obtains, obtain flow by part flow velocity area-method.
When described vertical velocity model is can be sloping known, vertical line is inserted in long identical with the vertical line depth of water, wide is in the wide rectangular cross section of the water surface, obtains vertical velocity in the rectangular cross section according to rectangular cross section vertical velocity formula; Vertical line is inserted in high identically with the vertical line depth of water, the end is in the wide triangular section of the water surface again, obtains vertical velocity in the triangular section according to triangular section vertical velocity formula; According to described two vertical velocities and be clipped in rectangular cross section and triangular section between not discharge area, utilize interpolation method to obtain actual vertical velocity.
Described rectangular cross section vertical velocity formula is:
u = u 1 2 + u 2 2 = α 2 n R x 1 2 / 3 S 1 / 2 + α 2 n R x 2 2 / 3 S 1 / 2
Wherein: u is the vertical velocity in the rectangular cross section;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
α is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
Described triangular section vertical velocity formula is:
v = v 1 2 + v 2 2 = β 2 n R x 1 2 / 3 S 1 / 2 + β 2 n R x 2 2 / 3 S 1 / 2
Wherein: v is the vertical velocity in the triangular section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
β is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
The formula that described interpolation method adopted is:
U = 1 2 [ u 1 - ( u 1 - v 1 ) f 1 F 1 ] + 1 2 [ u 2 - ( u 2 - v 2 ) f 2 F 2 ]
Wherein: U is actual vertical velocity;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
f 1For being clipped in the anyway water area between rectangular cross section and the triangular section;
f 2For being clipped in the discharge area not, the right side between rectangular cross section and the triangular section;
F 1Left side product moment for rectangular cross section and triangular section;
F 2Left side product moment for rectangular cross section and triangular section.
Described roughness is to adopt following formula to calculate:
n = n ‾ + n n 2 n n = n c + ΣΔn Δn = ( n x - n c ) h x ‾ L x + 2 h x ‾
Wherein: n is a roughness;
N be in the river course zones of different be the weighting roughness average of weight with the discharge area;
n nFor roughness transmission influence and;
n cRoughness for the vertical line region;
Δ n is the influence value of the roughness of zones of different in the river course to vertical velocity;
n xRoughness for various zones in the river course;
Figure A20061007243100082
Be roughness n xThe mean depth in zone;
L xBe roughness n xThe zone to the distance of vertical line.
When the unknown of energy slope, the position C1 of described two testing vertical lines and C2 are chosen as respectively apart from each wide position of 1/4th to 1/3rd waters surface, riverbank, the left and right sides.
Select many testing vertical line position and many vertical lines, adopt above-mentioned steps B to obtain the vertical velocity of each vertical line of the vertical velocity of each vertical line between the two adjacent testing vertical lines and testing vertical line both sides respectively to step e, obtain flow by part flow velocity area-method then.
One bank is selected two testing vertical line position in the river course, adopt above-mentioned steps B to step D, obtain the energy slope and the poor Δ S in energy slope of two testing vertical lines, can carry out linear extension to other vertical line of section by slope difference Δ S with this, obtain the energy slope of each bar vertical line, utilize the vertical velocity model to obtain vertical velocity then, obtain flow by part flow velocity area-method then.
The present invention has the following advantages and beneficial effect:
1, method is applicable to various irregular sections;
2, water levels at different levels all need not be demarcated, and can directly calculate satisfied result;
3, can realize flow metering real-time online, robotization, remote monitoring and remote measurement;
4, can shorten the flow measurement time greatly, the original flow measurement work of finishing in about one hour is shortened to 2 to 5 minutes;
5, be not subjected to the influence of range of stage, improved the big vast ability of surveying.
Above-mentioned and additional features, advantage of the present invention can further be understood by the detailed description below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a vertical velocity model synoptic diagram;
Fig. 2 is a vertical velocity correction factor curve synoptic diagram one;
Fig. 3 is a vertical velocity correction factor curve synoptic diagram two;
Fig. 4 and Fig. 5 are channel roughness zones of different distribution schematic diagram.
Embodiment
To shown in Figure 5, the invention provides a kind of two-line energy slope flow rate metering method as Fig. 1, be applicable to the flow of metering rivers, open channel, for convenience of description, the vertical velocity model that will use in the two-line energy slope flow rate metering method of the present invention at first is described at this.
As shown in Figure 1, described vertical velocity model is, when can be sloping known, vertical line is inserted in long identical with the vertical line depth of water, wide is in the wide rectangular cross section of the water surface, promptly among the rectangle abcd shown in the accompanying drawing, obtains vertical velocity in the rectangular cross section according to rectangular cross section vertical velocity formula (described below); Vertical line is inserted in high identically with the vertical line depth of water, the end is in the wide triangular section of the water surface again, promptly among the triangle aed shown in the accompanying drawing, obtains vertical velocity in the triangular section according to triangular section vertical velocity formula (described below); Rectangular cross section and triangular section are overlapped, soon rectangle abcd and triangle aed overlap with limit ad and are nested together, form state as shown in Figure 1, then according to described two vertical velocities and be clipped in rectangular cross section and triangular section between not discharge area, be the dash area among Fig. 1, utilize the interpolation method (described below) to obtain actual vertical velocity.
Described rectangular cross section vertical velocity formula is:
u = u 1 2 + u 2 2 = α 2 n R x 1 2 / 3 S 1 / 2 + α 2 n R x 2 2 / 3 S 1 / 2
Wherein: u is the vertical velocity in the rectangular cross section;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
α is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
Described triangular section vertical velocity formula is:
v = v 1 2 + v 2 2 = β 2 n R x 1 2 / 3 S 1 / 2 + β 2 n R x 2 2 / 3 S 1 / 2
Wherein: v is the vertical velocity in the triangular section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
β is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
In the above-mentioned formula, related to vertical velocity correction factor α and β, wherein α is relevant with the breadth depth ratio B/h in river course, the relation that it is concrete, and curve as shown in Figure 2 can be selected corresponding vertical velocity correction factor α according to the breadth depth ratio B/h in river course to be measured; β is relevant with slope coefficient m, the relation that it is concrete, and curve as shown in Figure 3 can be selected corresponding vertical velocity correction factor β according to the slope coefficient m in river course to be measured.
The formula that calculates the left and right hydraulic radius of vertical line is respectively:
R x 1 = hx h + x , R x 2 = h ( B - x ) h + B - x
Wherein, h is the depth of water of rectangle or triangular section, and B is that the water surface is wide, and x is that vertical line is to the distance between the left bank, river course.
The formula that described interpolation method adopted is:
U = 1 2 [ u 1 - ( u 1 - v 1 ) f 1 F 1 ] + 1 2 [ u 2 - ( u 2 - v 2 ) f 2 F 2 ]
Wherein: U is actual vertical velocity;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
f 1For being clipped in the anyway water area between rectangular cross section and the triangular section;
f 2For being clipped in the discharge area not, the right side between rectangular cross section and the triangular section;
F 1Left side product moment for rectangular cross section and triangular section;
F 2Left side product moment for rectangular cross section and triangular section.
In the above formula, related to roughness, for different river courses, the value of roughness can be different, as shown in Figure 4 and Figure 5, in one embodiment, contain ground, clay, cobble, sand-pebble and meadow in the river course, it has distributed areas separately in the river course, described roughness is to adopt following formula to calculate:
n = n ‾ + n n 2 n n = n c + ΣΔn Δn = ( n x - n c ) h x ‾ L x + 2 h x ‾
Wherein: n is a roughness;
N be in the river course zones of different be the weighting roughness average of weight with the discharge area;
n nFor roughness transmission influence and;
n cRoughness for the vertical line region;
Δ n is the influence value of the roughness of zones of different in the river course to vertical velocity;
n xRoughness for various zones in the river course;
Be roughness n xThe mean depth in zone;
L xBe roughness n xThe zone to the distance of vertical line.
After having obtained the vertical velocity model, just can obtain the discharge of river according to following two-line energy slope flow rate metering method.Described two-line energy slope flow rate metering method may further comprise the steps:
A. determine the position C1 and the C2 of two testing vertical lines, promptly on river cross-section, select two position C1 and C2 that carry out the vertical line of fluid-velocity survey;
B. utilize current meter to measure vertical velocity V1, the V2 of corresponding above-mentioned two vertical line position C1, C2 respectively;
C. utilize reverse the obtaining of vertical velocity model to obtain initially energy slope difference Δ S0 thus, Δ S0=S1-S2 corresponding to the sloping S1 of the energy of above-mentioned V1 with corresponding to the sloping S2 of the energy of V2 (can sloping equal the water surface slope under the equal uniform flow condition);
D. when river water level changes, repeat above-mentioned steps B and C, obtain vertical velocity V1 ', the V2 ' of correspondence two vertical line position C1, the C2 of this moment, and corresponding to the sloping S1 ' of the energy of V1 ' with corresponding to the sloping S2 ' of the energy of V2 ', obtain energy slope difference Δ S thus, Δ S=S1 '-(S2 '+Δ S0);
E. select some vertical lines on river cross-section, on the vertical line between vertical line position C1 and the C2, by can sloping S1 ', S2 ' and can slope difference Δ S, that adopts that approach based on linear interpolation obtains each vertical line can be sloping; The vertical line of vertical line position C1 and C2 both sides can be taken as S1 ' or S2 ' respectively in the slope, promptly this vertical profile line of vertical line position C1 can be taken as S1 ' in the slope, this vertical profile line of vertical line position C2 can be taken as S2 ' in the slope; Energy on each vertical line that utilization obtains is sloping, obtains the vertical velocity of each vertical line by the vertical velocity model;
F. utilize the vertical velocity of each vertical line that obtains, obtain flow by part flow velocity area-method.
The position C1 of described two testing vertical lines and C2 can be chosen as respectively apart from each wide position of 1/4th to 1/3rd waters surface, riverbank, the left and right sides.
In step B, the flow velocity of measuring vertical line position C1 and C2 place can adopt the method for defined among the GB Code for measurement of fluid flow in open channels GB50179-93 to measure, promptly can adopt one point method, two point method, three point method or five-spot to measure, or adopt doppler velocimeter directly to measure.
In step F, the part flow velocity area-method that is adopted is to adopt the part flow velocity area-method of defined among the GB Code for measurement of fluid flow in open channels GB50179-93.Therefore the method for above-described employing GB regulation is not described in detail at this because belong to common practise.
In addition, require height and the flow condition complexity for the river course breadth depth ratio than big or measuring accuracy, produce the situation of overbank, can select many testing vertical line position and many vertical lines, such as selecting 3 or 4 testing vertical line position, adopt above-mentioned steps B to obtain the vertical velocity of each vertical line of the vertical velocity of each vertical line between the two adjacent testing vertical lines and testing vertical line both sides respectively to step e, obtain flow by part flow velocity area-method then.
Can also select two testing vertical line position by one bank in the river course, adopt above-mentioned steps B to step D, obtain the energy slope and the poor Δ S in energy slope of two testing vertical lines, can carry out linear extension to other vertical line of section by slope difference Δ S with this, obtain the energy slope of each bar vertical line, utilize the vertical velocity model to obtain vertical velocity then, obtain flow by part flow velocity area-method then.
Two-line energy slope flow rate metering method of the present invention changes various complex situations the situation of change of flow velocity on the gaging section that is caused, it is the situation of change of velocity field on the section, come out by the sloping message reflection of the energy of many testing vertical lines, need not demarcate, can calculate flow accurately, improve the precision of flow metering.All implementing actual measurement work such as important hydrometric stations, many places such as hydrometric station, high dam continent, hydrometric stations, Zhangjiajie, computational accuracy has reached a class precision station, has obtained good measurement result.
Be to be understood that, the above illustrative and nonrestrictive just for the purpose of the present invention of explanation in conjunction with the embodiments, without departing from the spirit and scope of the present invention, can make many changes and modification to the present invention, it all will drop in the scope of the invention defined by the claims.

Claims (9)

1, a kind of two-line energy slope flow rate metering method is applicable to the flow that measures rivers, open channel, it is characterized in that, may further comprise the steps:
A. determine the position C1 and the C2 of two testing vertical lines, promptly on river cross-section, select two position C1 and C2 that carry out the vertical line of fluid-velocity survey;
B. utilize current meter to measure vertical velocity V1, the V2 of corresponding above-mentioned two vertical line position C1, C2 respectively;
C. utilize that the vertical velocity model is reverse to be obtained corresponding to the sloping S1 of the energy of above-mentioned V1 with corresponding to the sloping S2 of the energy of V2, obtaining thus initially can slope difference △ S0, △ S0=S1-S2;
D. when river water level changes, repeat above-mentioned steps B and C, obtain vertical velocity V1 ', the V2 ' of correspondence two vertical line position C1, the C2 of this moment, and corresponding to the sloping S1 ' of the energy of V1 ' with corresponding to the sloping S2 ' of the energy of V2 ', obtain energy slope difference △ S thus, △ S=S1 '-(S2 '+△ S0);
E. select some vertical lines on river cross-section, on the vertical line between vertical line position C1 and the C2, by can sloping S1 ', S2 ' and can slope difference △ S, that adopts that approach based on linear interpolation obtains each vertical line can be sloping; The vertical line of vertical line position C1 and C2 both sides can be taken as S1 ' or S2 ' respectively in the slope, promptly this vertical profile line of vertical line position C1 can be taken as S1 ' in the slope, this vertical profile line of vertical line position C2 can be taken as S2 ' in the slope; Energy on each vertical line that utilization obtains is sloping, obtains the vertical velocity of each vertical line by the vertical velocity model;
F. utilize the vertical velocity of each vertical line that obtains, obtain flow by part flow velocity area-method.
2, two-line energy slope flow rate metering method as claimed in claim 1, it is characterized in that: described vertical velocity model is when can be sloping known, vertical line is inserted in long identical with the vertical line depth of water, wide is in the wide rectangular cross section of the water surface, obtains vertical velocity in the rectangular cross section according to rectangular cross section vertical velocity formula; Vertical line is inserted in high identically with the vertical line depth of water, the end is in the wide triangular section of the water surface again, obtains vertical velocity in the triangular section according to triangular section vertical velocity formula; According to described two vertical velocities and be clipped in rectangular cross section and triangular section between not discharge area, utilize interpolation method to obtain actual vertical velocity.
3, two-line energy slope flow rate metering method as claimed in claim 2 is characterized in that: described rectangular cross section vertical velocity formula is:
u = u 1 2 + u 2 2 = α 2 n R x 1 2 / 3 S 1 / 2 + α 2 n R x 2 2 / 3 S 1 / 2
Wherein: u is the vertical velocity in the rectangular cross section;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
α is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
4, two-line energy slope flow rate metering method as claimed in claim 2 is characterized in that: described triangular section vertical velocity formula is:
v = v 1 2 + v 2 2 = β 2 n R x 1 2 / 3 S 1 / 2 + β 2 n R x 2 2 / 3 S 1 / 2
Wherein: v is the vertical velocity in the triangular section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
β is the vertical velocity correction factor;
N is a roughness;
R X1Be vertical line left side hydraulic radius;
R X2Be the right hydraulic radius of vertical line;
S is can the slope.
5, as claim 2,3 or 4 described two-line energy slope flow rate metering methods, it is characterized in that: the formula that described interpolation method adopted is:
U = 1 2 [ u 1 - ( u 1 - v 1 ) f 1 F 1 ] + 1 2 [ u 2 - ( u 2 - v 2 ) f 2 F 2 ]
Wherein: U is actual vertical velocity;
u 1Be the left vertical velocity in the rectangular cross section;
u 2Be the right vertical velocity in the rectangular cross section;
v 1Be the left vertical velocity in the triangular section;
v 2Be the right vertical velocity in the triangular section;
f 1For being clipped in the anyway water area between rectangular cross section and the triangular section;
f 2For being clipped in the discharge area not, the right side between rectangular cross section and the triangular section;
F 1Left side product moment for rectangular cross section and triangular section;
F 2Left side product moment for rectangular cross section and triangular section.
6, as claim 3 or 4 described two-line energy slope flow rate metering methods, it is characterized in that: described roughness is to adopt following formula to calculate:
n = n ‾ + n n 2 n n = n c + ΣΔn Δn = ( n x - n c ) h x ‾ L x + 2 h x ‾
Wherein: n is a roughness;
N be in the river course zones of different be the weighting roughness average of weight with the discharge area;
n nFor roughness transmission influence and;
n cRoughness for the vertical line region;
Δ n is the influence value of the roughness of zones of different in the river course to vertical velocity;
n xRoughness for various zones in the river course;
Be roughness n xThe mean depth in zone;
L xBe roughness n xThe zone to the distance of vertical line.
7, two-line energy slope flow rate metering method as claimed in claim 1 is characterized in that: the position C1 of described two testing vertical lines and C2 are chosen as respectively apart from each wide position of 1/4th to 1/3rd waters surface, riverbank, the left and right sides.
8, two-line energy slope flow rate metering method as claimed in claim 1, it is characterized in that: select many testing vertical line position and many vertical lines, adopt above-mentioned steps B to obtain the vertical velocity of each vertical line of the vertical velocity of each vertical line between the two adjacent testing vertical lines and testing vertical line both sides respectively to step e, obtain flow by part flow velocity area-method then.
9, two-line energy slope flow rate metering method as claimed in claim 1, it is characterized in that: one bank is selected two testing vertical line position in the river course, adopt above-mentioned steps B to step D, obtain the energy slope and the poor △ S in energy slope of two testing vertical lines, can carry out linear extension to other vertical line of section by slope difference △ S with this, obtain the energy slope of each bar vertical line, utilize the vertical velocity model to obtain vertical velocity then, obtain flow by part flow velocity area-method then.
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CN102401685A (en) * 2011-11-17 2012-04-04 中国计量学院 Method and device for carrying out online verification/calibration on open channel flowmeter
CN106320255A (en) * 2016-08-22 2017-01-11 河海大学 Overbank flow floodplain and channel excess flow computing method
CN110243423A (en) * 2019-07-29 2019-09-17 中国电建集团中南勘测设计研究院有限公司 Discharge of river calculation method and system
CN110297104A (en) * 2019-06-04 2019-10-01 长江水利委员会水文局 A kind of river represents vertical velocity profile real-time online measuring method

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CN1110401A (en) * 1993-12-31 1995-10-18 长治市水利局 Water flow rating method and device for water-distributing gap in irrigation area
US5780747A (en) * 1995-12-18 1998-07-14 Changmin Co., Ltd. Open channel multichannel ultrasonic flowrate measurement apparatus and method
CN1180161A (en) * 1996-10-04 1998-04-29 水利部水利信息中心 Method and device for measuring river channel section fixed-point current speed
CN1158529C (en) * 2001-05-16 2004-07-21 梁嘉麟 Tide and river hydrologic data and water quality measuring and analyzing method

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Publication number Priority date Publication date Assignee Title
CN102401685A (en) * 2011-11-17 2012-04-04 中国计量学院 Method and device for carrying out online verification/calibration on open channel flowmeter
CN106320255A (en) * 2016-08-22 2017-01-11 河海大学 Overbank flow floodplain and channel excess flow computing method
CN106320255B (en) * 2016-08-22 2018-07-13 河海大学 A kind of computational methods of Flood Plain Flow swale inflow-rate of water turbine
CN110297104A (en) * 2019-06-04 2019-10-01 长江水利委员会水文局 A kind of river represents vertical velocity profile real-time online measuring method
CN110243423A (en) * 2019-07-29 2019-09-17 中国电建集团中南勘测设计研究院有限公司 Discharge of river calculation method and system

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