CN107130560A - A kind of navigation channel linkage administering method based on quantitative target - Google Patents
A kind of navigation channel linkage administering method based on quantitative target Download PDFInfo
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Abstract
The invention discloses a kind of navigation channel linkage administering method based on quantitative target, comprise the following steps：Step a, by the ratio λ of current shifting power index and river course restraining force index, as section upstream and downstream linkage governance appraisal index, and sets metewand index value λe；Step b, tries to achieve the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs；Step c, by λsWith λeIt is compared, is implemented respectively according to comparative result as follows step by step：Step c 1, works as λs≥λeWhen, using upstream and downstream section as entirety, linkage regulation is carried out from top to bottom；Step c 2, works as λs<λeWhen, take single beach control measures.The present invention can provide a kind of navigation channel linkage administering method based on quantitative target, and through experiment, this method can adapt to long section regulation, and meet the regulation requirement of different dimensions of the channel targets.
Description
Technical field
The present invention relates to a kind of Waterway Regulation method, more particularly to a kind of navigation channel linkage improvement side based on quantitative target
Method.
Background technology
At present, for the section of the similar middle and lower reach of Yangtze River, the differentiation between upstream and downstream river course has in relevance, such as the Changjiang river
Swim the characteristics of Jingjiang river reach has " a curved change, winding to become " in history.In recent ten years, with the impounding and operation of Three Gorges Reservoir,
Middle and lower reach of Yangtze River section general scour, continent beach is corroded, and local river course develops to wide shallow direction, the increase of main flow swing space, is dividing
Distributary section mouth door, bend section and two it is curved between length it is straight or relax the boat groove unstability of changeover portion and increase, upstream and downstream section
Between linkage enhancing.And Upper Yangtze River is faced with building for step large reservoir group in addition to being completed Three Gorges Reservoir
If, by the linkage intensity being further exacerbated by between upstream and downstream section.
Research work on the similar middle and lower reach of Yangtze River at present has been carried out a lot, joins for the river regime between upstream and downstream section
Dynamic also to have some qualitative analyses, summing up the linkage of adjacent section differentiation includes two aspects, one is the linkage of flow characteristics,
The second is the linkage that continent beach is developed.By taking Yangtze middle reaches Jingjiang river reach as an example, the sandy gravel section more than the street of Jingjiang river reach metropolis,
Linkage is mainly shown as the former, and what mainly low water level changed transmits along journey；Sandy section below the street of metropolis, linkage master
Show as influencing each other for the latter, the i.e. differentiation of upstream and downstream section continent beach.
As can be seen here, linkage properties study at present on similar middle and lower reach of Yangtze River section, substantially with empirical analysis
Based on, lack the evaluation index and method of quantification, in specific waterway regulation works is instructed, it is difficult to prepare to embody upstream and downstream
Section linkage boat flowing current separation is selected and engineering layout etc. influence, accordingly, it would be desirable to set up based on linkage quantitative assessing index
On the basis of, propose a kind of new Waterway Regulation method.
The content of the invention
The present invention provides a kind of navigation channel linkage based on quantitative target to solve technical problem present in known technology
Administering method.
The present invention is adopted the technical scheme that to solve technical problem present in known technology：One kind is based on quantitatively finger
Link administering method in target navigation channel, comprises the following steps：
Step a, by the ratio λ of current shifting power index and river course restraining force index, links as section upstream and downstream and administers
Evaluation index, and set metewand index value λe；
Step b, tries to achieve the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs；
Step c, by λsWith λeIt is compared, is implemented respectively according to comparative result as follows step by step：
Step c-1, works as λs≥λeWhen, using upstream and downstream section as entirety, linkage regulation is carried out from top to bottom；
Step c-2, works as λs<λeWhen, take single beach control measures.
Further, in the step a, current shifting power index is set to R0, river course restraining force index is set to R*, then
Upstream and downstream linkage governance appraisal index λ value is tried to achieve by below equation：
λ=R0/R* (1)
Wherein, in formula (1), formula (2) and formula (3), each parameter definition is as follows：
R0For current shifting power index, characterized with flow dynamic axis bending radius, unit is m；
R*For river course restraining force index, characterized with river course thalweg bending radius, unit is m；
Q is section inlet flow rate, and unit is m3/s；
QmaxFor section import maximum stream flow, unit is m3/s；
QminFor section import minimum discharge, unit is m3/s；
L is that rock head or node protrude water front length, and unit is m；
D is riverbed median particle diameter, and unit is m；
B is flat beach river width, and unit is m；
h0For the flat beach depth of water, unit is m；
ζ is flat beach regime coefficient；
J is gradient；
For river course flexibility；
G is acceleration of gravity, and unit is s/m2；
ρ is density, and unit is kg/m3；
M scores for riverbank geology, is classified according to soil layer, value 60~100.
Further, the step c-1's is step by step：
Step c-1-1, object of planning river type and preferable air route：The section administered for needing to link, with reference to natural river
Geometric shape rule determines a target river course and preferable air route；
Step c-1-2, sets up river regime stability index function, and riverbed border, current, silt parameter are substituted into function representation
Formula, tries to achieve the river regime stability index before and after administering, and be compared, Forecast and Estimate engineering effort.
Further, by the domestic and international a plurality of natural river form of statistical analysis, natural river geometric shape rule is obtained：
C=7~11B (4)
In formula (4)：C is river length of curve；B is flat beach river width.
Further, river regime stability index is set to Ψ, boundary condition overall target is set to Γ, flow condition is integrated
Index is set to Λ, then river regime stability index Ψ value is tried to achieve by below equation：
Ψ=Γ0.1Λ0.05(5),
In formula (5), formula (6) and formula (7), each parameter definition is as follows：
M scores for riverbank geology, is classified according to soil layer, value 60~100；
DL1For section left bank import rock head or near nodal scour hole mean depth, unit is m；
DL2Rock head or near nodal scour hole mean depth are exported for section left bank, unit is m；
DR1For section right bank import rock head or near nodal scour hole mean depth, unit is m；
DR2Rock head or near nodal scour hole mean depth are exported for section right bank, unit is m；
L ' is the fore-and-aft distance between rock head or between node, and unit is m；
K is regulation section feature flow flow stage, wherein, when regulation section is characterized as single river type, k values are 1；When
When regulation section is characterized as point distributary type, k values are 3；
For bank-flush discharge, unit is m3/s；
Q1To play pendulum flow, unit is m3/s；
Q2Untill put flow, unit is m3/s；
T rises to swing to for current only puts corresponding continuous dayses, and unit is day；
T rises to swing to and only put the corresponding cycle for current, and unit is day；
L is the average wobble amplitude that current act main flow during swinging to only pendulum, and unit is m；
LmaxFor the full swing amplitude of main flow, unit is m.
The present invention has the advantages and positive effects of：The linkage in conventional waterway regulation between upstream and downstream section is overcome to close
System relies on qualitative empirical analysis, and not enough linked there is provided a kind of navigation channel based on quantitative target for lacking quantitative target is administered
Method, method is accurate, through experiment, and this method can adapt to long section regulation, and meet the regulation of different dimensions of the channel targets will
Ask.The present invention has considered landform inside river course, geology, border and the outside change to flow next husky condition, based on a large amount of realities
Survey data and historical data, by modeling analysis in it contact.Quantitative target can be used using the present invention, is analysed scientifically shallow
Necessity and method that the linkage of beach section is administered, and then ensure having between the systematicness of long section waterway regulation and upstream and downstream section
Machine is contacted, and makes the stability in navigation channel and navigation effect after regulation more preferable.
Brief description of the drawings
Fig. 1 is the workflow diagram of the present invention；
Fig. 2 is Yangtze middle reaches lotus root stone Chan sections schematic diagram in specific embodiment of the invention.
Embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following examples, and coordinate accompanying drawing
Describe in detail as follows：
Fig. 1 is referred to, a kind of navigation channel linkage administering method based on quantitative target comprises the following steps：
Step a, by the ratio λ of current shifting power index and river course restraining force index, links as section upstream and downstream and administers
Evaluation index, and set metewand index value λe；
Step b, tries to achieve the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs；
Step c, by λsWith λeIt is compared, is implemented respectively according to comparative result as follows step by step：
Step c-1, works as λs≥λeWhen, using upstream and downstream section as entirety, linkage regulation is carried out from top to bottom；
Step c-2, works as λs<λeWhen, take single beach control measures.
Further, in the step a, current shifting power index can be set to R0, river course restraining force index can be set to
R*, then upstream and downstream linkage governance appraisal index λ value can be tried to achieve by below equation：
λ=R0/R* (1)
In formula (1), formula (2) and formula (3), each parameter definition is as follows：
R0For current shifting power index, characterized with flow dynamic axis bending radius, unit is m；
R*For river course restraining force index, characterized with river course thalweg bending radius, unit is m；
Q is section inlet flow rate, and unit is m3/s；
QmaxFor section maximum stream flow, unit is m3/s；
QminFor section minimum discharge, unit is m3/s；
Qmax-Qmin, reflect flow luffing；
L is that rock head or node protrude water front length, and unit is m；
D is riverbed median particle diameter, and unit is m；
B is flat beach river width, and unit is m；
h0For the flat beach depth of water, unit is m；
ζ is flat beach regime coefficient；
J is gradient；
For river course flexibility；
G is acceleration of gravity, and unit is s/m2；
ρ is the density of water, and unit is kg/m3；
M scores for riverbank geology, is classified according to soil layer, can value 60~100.Such as：Top cohesive soil and layer of sand alternating layers,
Burning into sand class lenticular body, in the case of the single layer of sand of multi-factor structure of layer of sand is in bottom, M desirable 60~70；Top cohesive soil thickness<
5m, bottom is diadactic structure or top cohesive soil and layer of sand alternating layers, burning into sand class lenticular body of layer of sand etc., and bottom is more for cohesive soil
In the case of meta structure, M desirable 70~80；Top cohesive soil thickness>5m, the diadactic structure or top sand of bottom layer of sand is thick<5m,
In the case of the diadactic structure of bottom cohesive soil, M desirable 80~90；In the case of rock massif or single stickiness soil layer, M desirable 90~
100。
The derivation demonstration of above-mentioned formula (1), formula (2) and formula (3) refer in May, 2017《Geography Journal》Volume 72
The article " middle and lower reach of Yangtze River barrier section mechanism of action Primary Study " that 5th 817-29 pages of phase delivered.
In above-mentioned parameter, Q is section inlet flow rate, is the different periods flow at the import of section, is variable；QmaxFor river
Maximum stream flow at section import；QminFor minimum discharge at the import of section.
Further, the step c-1 can continue subdivision, and it can be step by step：
Step c-1-1, object of planning river type and preferable air route：The section administered for needing to link, refers to natural river
Stream geometric shape rule determines a target river course and preferable air route；
Step c-1-2, can set up river regime stability index function, and the parameters such as riverbed border, current, silt are substituted into function table
Up to formula, the river regime stability index before and after administering is tried to achieve, and is compared, can combining target dimensions of the channel, Forecast and Estimate engineering effect
Really.
Further, natural river geometric shape rule can be obtained by the domestic and international a plurality of natural river form of statistical analysis
Rule：
C=7~11B (4)
In formula (4)：C is river length of curve；B is flat beach river width.
Further, river regime stability index Ψ can be set to, boundary condition overall target Γ can be set to, can be by current bar
Part overall target is set to Λ, then river regime stability index Ψ value can be tried to achieve by below equation：
Ψ=Γ0.1Λ0.05(5),
In formula (5), formula (6) and formula (7), each parameter definition is as follows：
M scores for riverbank geology, is classified according to soil layer, can value 60~100.Such as：Top cohesive soil and layer of sand alternating layers,
Burning into sand class lenticular body, in the case of the single layer of sand of multi-factor structure of layer of sand is in bottom, M desirable 60~70；Top cohesive soil thickness<
5m, bottom is diadactic structure or top cohesive soil and layer of sand alternating layers, burning into sand class lenticular body of layer of sand etc., and bottom is more for cohesive soil
In the case of meta structure, M desirable 70~80；Top cohesive soil thickness>5m, the diadactic structure or top sand of bottom layer of sand is thick<5m,
In the case of the diadactic structure of bottom cohesive soil, M desirable 80~90；In the case of rock massif or single stickiness soil layer, M desirable 90~
100。
DL1For section left bank import rock head or near nodal scour hole mean depth, unit is m；
DL2Rock head or near nodal scour hole mean depth are exported for section left bank, unit is m；
DR1For section right bank import rock head or near nodal scour hole mean depth, unit is m；
DR2Rock head or near nodal scour hole mean depth are exported for section right bank, unit is m；
L ' is the fore-and-aft distance between rock head or between node, and unit is m；
K for regulation section feature flow flow stage, wherein, when renovate section be characterized as single river type when, k can value be 1；
When renovating section and being characterized as point distributary type, k can value be 3；
For bank-flush discharge, unit is m3/s；
Q1To play pendulum flow, unit is m3/s；
Q2Untill put flow, unit is m3/s；
T rises to swing to for current only puts corresponding continuous dayses, and unit is day；
T rises to swing to and only put the corresponding cycle for current, and unit is day；
L is the average wobble amplitude that current act main flow during swinging to only pendulum, and unit is m；
LmaxFor the full swing amplitude of main flow, unit is m.
Above-mentioned formula (5), formula (6) and formula (7) are analyzed by the substantial amounts of field data of lower Yangtze, are passed through
The expression formula that the method such as modeling and fitting is obtained.
Hereinafter the specific reality of the present invention is illustrated in conjunction with Yangtze middle reaches lotus root stone Chan sections and Longkou section as example
Apply step.
Step a, by the ratio λ of current shifting power index and river course restraining force index, links as section upstream and downstream and administers
Evaluation index, and set metewand index value λe；λeBy methods such as expertises, λ is determinedeFor 1.
Step b, tries to achieve the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs；
For the lotus root stone Chan sections of Yangtze middle reaches, using mapping in 2014, the local river of Shishou bend in lotus root stone Chan sections
Duan Fasheng collapses on the bank so that 4m lines boat groove bending radius be unsatisfactory for waterway planning target (4m boat groove planning bending radius be
1000m), by analysis, the phenomenon is mainly swung by upstream main flow to be caused.According to field data in 2014, by formula (1), public affairs
Formula (2) and formula (3) are calculated, and obtain the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs=
1.15。
For the Longkou section of Yangtze middle reaches, Lu Xi mouthfuls of sections, lower even Jiayu section are connect thereon.Utilize field data, warp
Calculate, Longkou section, the current shifting power index in its actual navigation channel and the actual ratio λ of river course restraining force indexs＜ 0.5.
Step c, by λsWith λeIt is compared, is performed the following steps respectively according to comparative result：
Step c-1, works as λs≥λeWhen, using upstream and downstream section as entirety, linkage regulation is carried out from top to bottom；
Step c-2, works as λs<λeWhen, take single beach control measures.
For Longkou section, its λs＜ λe, i.e., do not have interaction relation between Longkou section and upstream and downstream section, implement step
Single beach control measures are mainly taken in rapid c-2, its improvement.From the point of view of history river bed change, since 1930s, its upstream
Lu Xi mouthfuls of sections experienced 5 Changing periods, and Jiayu section only has 2 Changing periods downstream, it can also be seen that Longkou section
The River regularized of Lu Xi mouthfuls of sections is obstructed, without Jiayu section transmission downstream.There is barrier feature for former section, should
The engineering measures such as shore protection are taken to prevent its barrier from disappearing or weakening.In recent years, as Impoundment of Three Gorges Reservoir is run, Longkou section
Convex bank point bar has washed away, and river width becomes big, and the barrier feature of the section has weakened, and to strengthen or maintaining it to obstruct feature, prevents
Transmission only between upstream and downstream river regime, it is necessary to implement to guard engineering in time to Longkou section convex bank point bar.
For lotus root stone Chan sections, its λs＞ λe, i.e., there is interaction relation between lotus root stone Chan sections and upstream and downstream section, implement
Step c-1, it is necessary to using upstream and downstream section as entirety, carry out linkage regulation from top to bottom.As maintain Shishou bend bending half
Footpath, not only needs to implement bank-protection works at the left bank collapse on the bank of Shishou bend, it is influenceed it is also contemplated that upper reach main flow is swung,
Mouthful kiln channel bar and lotus pool mouthful channel bar lower left side that need to be fallen in upstream are implemented corresponding to guard engineering and prevent main flow from further swinging.
For the improvement of lotus root stone Chan sections, linkage regulation method is carried out from top to bottom can be further refined as two steps：
Step c-1-1, object of planning river type and preferable air route：The section administered for needing to link, with reference to natural river
Geometric shape rule determines a target river course and preferable air route；
Step c-1-2, can set up river regime stability index function, and riverbed border, current, silt of lotus root stone Chan sections etc. are joined
Number substitutes into function expressions, tries to achieve the river regime stability index before and after administering, and is compared, can combining target dimensions of the channel, in advance
Appraisal engineering effort.
Wherein, step c-1-1, for lotus root stone Chan sections, when designing main channel circuit, makes navigation channel form meet day as far as possible
Right fluvial morphology, by crossing statistical analysis a plurality of natural river form both at home and abroad, obtains natural river geometric shape rule：
C=7~11B (4),
In formula (4)：C is river length of curve；B is flat beach river width.
According to the rule, design boat groove in lotus root stone Chan sections, see Fig. 2, connects trip all days section on design boat groove, new factory with
Under to top Yang Shu be located at river course on the left of, below top Yang Shu transition to the right, to the kiln of falling mouth channel bar left side of head enter the left groove of water channel under
OK, until the outlet of the left branch of a river enters Shishou bend section, go out and fish tail continent tail is arrived after Shishou bend, enter from the lateral left bank side transition of right bank
Roller gulf water channel.
Step c-1-2, for lotus root stone Chan sections, after waterway regulation works is implemented, Shishou bend bending radius stabilization exists
Within 1000m, the dimensions of the channel object of planning can reach.River regime stability index can be set to Ψ, can be by boundary condition overall target
Γ is set to, flow condition overall target can be set to Λ, then river regime stability index Ψ value can be tried to achieve by below equation：
Ψ=Γ0.1Λ0.05(5),
Before and after waterway regulation works is implemented, it is believed that border comprehensive parameters are the same, and the implementation of training works is changed
Flow condition comprehensive parameters Λ numerical value.According to flow condition comprehensive parameters Λ calculation formula (7), engineering in the formula (7)
The value of front and rear change is mainly the full swing amplitude L of main flowmax, relevant parameter is substituted into mathematical modeling, according to mathematical modeling meter
Calculate result, it is known that after waterway regulation works is implemented, the main flow full swing amplitude reduction of lotus root stone Chan sections is substituted into formula (5),
Understand, after waterway regulation works is implemented, river regime stability index increase, engineering effort is good.
Embodiment described above is merely to illustrate the technological thought and feature of the present invention, in the art its object is to make
Technical staff it will be appreciated that present disclosure and implementing according to this, it is impossible to the patent model of the present invention is only limited with the present embodiment
Enclose, i.e., equal change or modification that all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (5)
1. a kind of navigation channel linkage administering method based on quantitative target, it is characterised in that comprise the following steps：
Step a, by the ratio λ of current shifting power index and river course restraining force index, is used as section upstream and downstream linkage governance appraisal
Index, and set metewand index value λe；
Step b, tries to achieve the current shifting power index in actual navigation channel and the actual ratio λ of river course restraining force indexs；
Step c, by λsWith λeIt is compared, is implemented respectively according to comparative result as follows step by step：
Step c-1, works as λs≥λeWhen, using upstream and downstream section as entirety, linkage regulation is carried out from top to bottom；
Step c-2, works as λs<λeWhen, take single beach control measures.
2. the navigation channel linkage administering method according to claim 1 based on quantitative target, it is characterised in that the step a
In, current shifting power index is set to R0, river course restraining force index is set to R*, then upstream and downstream linkage governance appraisal index λ value
Tried to achieve by below equation：
λ=R0/R* (1)
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Wherein, in formula (1), formula (2) and formula (3), each parameter definition is as follows：
R0For current shifting power index, characterized with flow dynamic axis bending radius, unit is m；
R*For river course restraining force index, characterized with river course thalweg bending radius, unit is m；
Q is section inlet flow rate, and unit is m3/s；
QmaxFor section import maximum stream flow, unit is m3/s；
QminFor section import minimum discharge, unit is m3/s；
L is that rock head or node protrude water front length, and unit is m；
D is riverbed median particle diameter, and unit is m；
B is flat beach river width, and unit is m；
h0For the flat beach depth of water, unit is m；
ζ is flat beach regime coefficient；
J is gradient；
For river course flexibility；
G is acceleration of gravity, and unit is s/m2；
ρ is density, and unit is kg/m3；
M scores for riverbank geology, is classified according to soil layer, value 60~100.
3. the navigation channel linkage administering method according to claim 1 based on quantitative target, it is characterised in that the step c-
1 is step by step：
Step c-1-1, object of planning river type and preferable air route：The section administered for needing to link, with reference to natural river geometry
Form law determines a target river course and preferable air route；
Step c-1-2, sets up river regime stability index function, and riverbed border, current, silt parameter are substituted into function expression, asked
Front and rear river regime stability index must be administered, and is compared, Forecast and Estimate engineering effort.
4. the navigation channel linkage administering method according to claim 3 based on quantitative target, it is characterised in that pass through statistical
The domestic and international a plurality of natural river form of analysis, obtains natural river geometric shape rule：
C=7~11B (4)
In formula (4)：C is river length of curve；B is flat beach river width.
5. the navigation channel linkage administering method according to claim 3 based on quantitative target, it is characterised in that river regime is stable
Index is set to Ψ, and boundary condition overall target is set into Γ, and flow condition overall target is set into Λ, then river regime stability index Ψ
Value tried to achieve by below equation：
Ψ=Γ0.1Λ0.05 (5)
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</mrow>
<msub>
<mi>L</mi>
<mrow>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula (5), formula (6) and formula (7), each parameter definition is as follows：
M scores for riverbank geology, is classified according to soil layer, value 60~100；
DL1For section left bank import rock head or near nodal scour hole mean depth, unit is m；
DL2Rock head or near nodal scour hole mean depth are exported for section left bank, unit is m；
DR1For section right bank import rock head or near nodal scour hole mean depth, unit is m；
DR2Rock head or near nodal scour hole mean depth are exported for section right bank, unit is m；
L ' is the fore-and-aft distance between rock head or between node, and unit is m；
K is regulation section feature flow flow stage, wherein, when regulation section is characterized as single river type, k values are 1；Work as regulation
When section is characterized as point distributary type, k values are 3；
For bank-flush discharge, unit is m3/s；
Q1To play pendulum flow, unit is m3/s；
Q2Untill put flow, unit is m3/s；
T rises to swing to for current only puts corresponding continuous dayses, and unit is day；
T rises to swing to and only put the corresponding cycle for current, and unit is day；
L is the average wobble amplitude that current act main flow during swinging to only pendulum, and unit is m；
LmaxFor the full swing amplitude of main flow, unit is m.
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| CN112991819A (en) * | 2021-02-04 | 2021-06-18 | 上海海事大学 | Channel service level evaluation method based on water traffic macroscopic basic diagram |
| CN116280096A (en) * | 2023-01-17 | 2023-06-23 | 湖南省水运建设投资集团有限公司 | Control method and system for dividing river channel gate area by bending of ship |
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| CN112991819A (en) * | 2021-02-04 | 2021-06-18 | 上海海事大学 | Channel service level evaluation method based on water traffic macroscopic basic diagram |
| CN116280096A (en) * | 2023-01-17 | 2023-06-23 | 湖南省水运建设投资集团有限公司 | Control method and system for dividing river channel gate area by bending of ship |
| CN116280096B (en) * | 2023-01-17 | 2023-12-12 | 湖南省水运建设投资集团有限公司 | Control method and system for dividing river channel gate area by bending of ship |
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