CN109537537A - A kind of measurement water method and device thereof - Google Patents

A kind of measurement water method and device thereof Download PDF

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Publication number
CN109537537A
CN109537537A CN201811456624.9A CN201811456624A CN109537537A CN 109537537 A CN109537537 A CN 109537537A CN 201811456624 A CN201811456624 A CN 201811456624A CN 109537537 A CN109537537 A CN 109537537A
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CN
China
Prior art keywords
weir
water
plate
weir plate
flow
Prior art date
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Pending
Application number
CN201811456624.9A
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Chinese (zh)
Inventor
郭江
孙建峰
郭宗信
刘子亭
张喜
季仁保
杨子魁
冯天权
李培增
张文锁
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Hebei Neptune Hydraulic Machinery Co Ltd
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Hebei Neptune Hydraulic Machinery Co Ltd
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Application filed by Hebei Neptune Hydraulic Machinery Co Ltd filed Critical Hebei Neptune Hydraulic Machinery Co Ltd
Priority to CN201811456624.9A priority Critical patent/CN109537537A/en
Publication of CN109537537A publication Critical patent/CN109537537A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/26Vertical-lift gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/26Vertical-lift gates
    • E02B7/34Flash- boards for vertical-lift gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/54Sealings for gates

Abstract

The invention discloses a kind of measurement water method and device thereof, method and device thereof of the invention change the fixed form for having passed system sharp-crested weir, install lifting mechanism at weir plate both ends, are driven by elevating mechanism, to realize that sharp-crested weir height is adjustable by the height of adjustment weir plate.When weir plate is displaced downwardly to flow control and amount water state, water flows through at the top of weir plate, and adjusts flow by the control weir plate amount of moving down, and water-level observation point is provided at 2~5 times of 1 upstream of the weir plate weir crest maximum head, to measure sluice head;Entire weir gate forms a sharp-crested weir at this time, under a certain predetermined altitude of weir plate, by measuring the structure size of weir head and weir gate, calculates the flow for flowing through weir gate.The applicable limitation requirement and drawback of conventional sharp-crested weir can be overcome, the water measure equipment of this laboratory precision grade of rectangle thin-wall weir can be applied to field and canal system.

Description

A kind of measurement water method and device thereof
Technical field
The present invention relates to hydraulic structure field, espespecially a kind of measurement water method and device thereof.
Background technique
Sharp-crested weir is the water flow of open canal equipment of a classics, and technology maturation, theoretical basis is solid, is more accurately to measure water Equipment.In existing water conservancy industry standard " hydraulic structure and weir notch test standardize " (SL 537), national standard " irrigation canal System quantities water specification " (GB/T 21303), " water metering directive/guide " (GB/T 28714), national measurement examination criteria " open channel weir Slot flowmeter measurement verification directive/guide " (JJG (water conservancy) 004) and international standard " open channel flow rate test --- sharp-crested weir " (ISO 1438) sharp-crested weir have been included in, its testing method and applicable elements have been dictated, measuring accuracy can reach 1.5%~ 3.0%.
Sharp-crested weir weir plate should be vertical with side wall and water (flow) direction, and sharp-edged should be made in crest of weir, and sharp-edged horizontal breadth is 0.001m ~0.002m, when thickness is greater than this size, notch lower edge will be processed into inclined-plane, and make the folder of weir crest downstream bevel and weir crest Angle is not preferably less than 45 ° (see Fig. 1).
When rectangle thin-wall weir water flowing flow measurement, the overflow that water flow is formed by thin-walled weir plate is chosen completely to be projected from weir crest, overflow Lower surface should contact with atmosphere, ventilate well, and overall with rectangle thin-wall weir is to guarantee that overflow stabilization need to set ventilation on the rear wall of weir Pipe.Downstream peak level should be lower than weir crest 0.1m, and weir head should be greater than 0.03m.
Head Measure section should be arranged at 2~5 times away from crest of weir upstream weir crest maximum heads.Thin-walled weir water gauge zero point Elevation is identical as elevation of weir crest, and water gauge zero point elevation is measured by level and determined.When crest of weir wide (b) and the nearly width of the channel (B) of row it When than b/B >=0.5, the length of the nearly gool of row at least should be 10 times of groove width;As b/B < 0.5, can suitably shorten.The nearly canal of row Slot should keep section unified neat, straight.
Since sharp-crested weir structure is simple, installing is easy, and cost is lower, is widely used in hydraulics, hydraulic test room and the row of filling It on channel, can be used alone, can also be used cooperatively with canal structure.Weir plate installation should be vertical, flows vertically to, the wall surface that meets water is answered It is smooth.Each section device should accurately securely, and the not variation of reason water flow and temperature and corrosion-deformation.Installation foundation needs heavily fortified point Gu not reason a variety of causes there is a situation where toppling, sliding, be broken, depression and leak, weir crest should often keep good surface Finish.
The Main Control Elements of sharp-crested weir amount water are weir head (H) and weir plate height (P), discharge coefficient and longitudinal contraction It is more closely related than (H/P), it is the key parameter of sharp-crested weir flow measurement.Since conventional sharp-crested weir existing at present is with fixed weir Height is flooded, the drawbacks of water hour blocks water, and water body when water can not be overcome big because being limited by flow formula use condition When silt content is larger, gool before weir is be easy to cause to deposit.Since there are drawbacks described above, this method is usually only applied to laboratory inspection It surveys.
In addition, due in codes and standards such as " irrigation canal system quantities water specification " (GB/T 21303-2017), to sharp-crested weir Longitudinal contraction ratio (H/P) numberical range done using limitation.And conventional sharp-crested weir has fixed weir high, in certain flow feelings Under condition, formed longitudinal contraction ratio (H/P) be it is fixed, if gone beyond the scope, will lead to precision and substantially reduce, thus use It is very limited.
Summary of the invention
To solve the above problems, present invention is primarily aimed at provide a kind of simple method and device thereof, can overcome often The applicable limitation requirement and drawback of sharp-crested weir are advised, and can be the water measure equipment application of this laboratory precision grade of rectangle thin-wall weir To field and canal system.To can provide a kind of not only amount with the weir Bao Bi it is aqueous can and precision, but also have common gate gear, store, The method of the flow adjustment effect of row;A secondary mesh it is to provide achievable canal capacity adjustment, stage-discharge data are adopted automatically Collection transmission can accomplish unattended, the product and method of realization canal capacity measurement and control integration.
To achieve the goals above, the present invention changes the fixed form of traditional sharp-crested weir, installs lifting machine at weir plate both ends Structure is driven by elevating mechanism, so as to adjust the height of weir plate, realizes that sharp-crested weir height is adjustable.
For this purpose, this method realizes that sharp-crested weir is high by adjusting the height of weir plate the present invention provides a kind of measurement water method Spend adjustable, when weir plate is displaced downwardly to flow control and amount water state, water flows through at the top of the weir plate, and by the control weir plate amount of moving down come Flow is adjusted, and is provided with water-level observation point at 2~5 times of 1 upstream of the weir plate weir crest maximum head, to measure sluice head;This When entire weir gate form a sharp-crested weir, under a certain predetermined altitude of weir plate, pass through the structure ruler of metering weir head and weir gate It is very little, calculate the flow for flowing through weir gate.
Further, this method has following three working condition:
(1) water blocking state, under this operating condition, weir plate is all risen, the gate as a water blocking purposes;
(2) flow control and amount water state, under this operating condition, weir plate is moved down, and water flows through at the top of weir plate, flows through weir gate with measurement Flow;
(3) draining and erosion and deposition state, under this operating condition, weir plate drop to upper limb it is concordant with canal bottom to be drained, sand surfing Dredging operation.
Preferably, it is applied to overall with weir and at working condition (3), using in the nearly slot of the row of sufficient length, Ke Yiyong Standard section amount water law measures flow, flow formula are as follows:
In formula: Q --- flow (m3/s);
A --- discharge section area (m2);
N --- canal bed roughness;
The hydraulic radius (m) of R --- the cross-section of river, R=A/X;
X --- wetted perimeter (m);
I --- channel water face is than drop.
Preferably, this method control control weir plate amount of moving down makes 0 < H/P < 6 when this puts method applied to standard-sized sheet weir, with An overall with weir is constituted, and calculates the formula for flowing through the flow of weir gate are as follows:
In formula: Q --- cross weir flow amount (m3/s);
M --- discharge coefficient,
M=0.407+0.0533H/P;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
Preferably, because the contracted weir is equipped with side pinch wall, thering is side to receive width T at this time big when this method is applied to contracted weir In zero, calculated using contracted weir flow formula:
In formula: Q --- cross weir flow amount (m3/s);
m0--- discharge coefficient,
B --- the nearly width of the channel degree (m) of row;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
Flow formula application conditions:
H/P < 0.5,
B > 0.15m,
P > 0.10m.
The present invention also provides a kind of measurement water installations, are set among water channel, which includes: weir moving up and down Plate, the column set on its both ends, and the lifting mechanism of the height of weir plate can be adjusted, and the canal bottom of the water channel has a weir Plate accommodation groove is provided with water-level observation point at the weir crest maximum head of 2~5 times of the weir plate upstream can accommodate mobile weir plate, with Measured sluice head.
Preferably, the weir plate width should be wider than water channel channel width, it is wide come out be partially installed in column water stopping trough.
Preferably, being equipped with the movable water sealing structure cooperated with the weir plate in column water stopping trough, when guaranteeing weir plate work not From side leak, and the weir plate accommodation groove upper end is equipped with the movable sealing structure cooperated with the weir plate to avoid silt entrance.It should Movable water sealing structure can be used finishing or other sealing modes taken (such as to add sealing structure, using rubber weather strip Deng).
Preferably, the distance between on the inside of two columns (constituting wide weir structure) equal with water channel channel width or Less than water channel channel width (contracted weir).
Preferably, this water channel canal bottom is arranged below settling pit, be provided in the settling pit for extracting mud submersible sewage pump out, To guarantee the weir plate energy dive to canal bottom hereinafter, phenomena such as without plug dead, card lock occurs.
Preferably, this method and its device can be configured with remote communication module and solar electric power supply system simultaneously, it can To realize canal capacity adjustment, the transmission of stage-discharge automatic data collection, can accomplish nothing by automatically controlling lifting weir gate height People is on duty, realizes canal capacity measurement and control integration.
Preferably, the device is equipped with control cabinet.
Preferably, 1 width of weir plate should be 40mm~100mm wider than channel width B.
Preferably, 1 top of weir plate is crossed at water and is provided with 45 ° of sharp-edgeds, so that water can be formed surely when passing through from weir plate top Determine overflow.
The beneficial effects of the invention are that by above-mentioned technical proposal, can overcome conventional sharp-crested weir applicable limitation requirement and The water measure equipment of this laboratory precision grade of rectangle thin-wall weir can be applied to field and canal system by drawback, mainly be used Rectangle thin-wall weir and gate support integrated structure form, have not only had the aqueous energy of the amount on the weir Bao Bi and precision, but also have common Gate gear stores, the flow adjustment effect of row;It can be configured with telecommunication, solar electric power supply system simultaneously, to pass through automatic lifting Weir gate height realizes canal capacity adjustment, the transmission of stage-discharge automatic data collection, can accomplish unattended, realization channel flow Measure measurement and control integration.
Wherein, weir plate can the mode of vertical drop dive formula solve traditional sharp-crested weir fixed weir so that weir plate is height-adjustable The longitudinal contraction that height is formed can optimize reasonable cross-section of river longitudinal contraction ratio (h/ according to operating flux range than limitation P), with head loss as small as possible, reach optimal and cross flow metering state.
Detailed description of the invention
Fig. 1 is sharp-crested weir crest of weir structural schematic diagram;
Fig. 2 is observing and controlling one weir gate overall structure diagram;
Fig. 3 is operating condition of the invention (1), and weir plate all rises, water blocking status diagram;
Fig. 4 is operating condition of the invention (2), and weir plate part is risen, flow control and amount water state schematic diagram;
Fig. 5 is operating condition of the invention (3), weir plate whole dive, draining and erosion and deposition status diagram;
Fig. 6 a Fig. 6 b is that rectangle thin-wall weir water meter of the invention calculates embodiment of the method schematic diagram.
Wherein: the sealing of 1 weir plate, 2 column, 3 mechanism for lifting, 4 control cabinet, 5 canal bottom, 6 column water stopping trough, 7 canal bank, 8 accommodation groove.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing technical solution of the present invention is described in further detail.
A kind of measurement water method and device thereof of the invention provide a kind of straightforward procedure, can overcome the suitable of conventional sharp-crested weir With limitation requirement and drawback, the water measure equipment of this laboratory precision grade of rectangle thin-wall weir can be applied to field and canal system, It mainly uses rectangle thin-wall weir and gate to support integrated structure form (see Fig. 2), both with the aqueous energy of amount on the weir Bao Bi And precision, and with common gate gear, storage, the flow adjustment effect arranged;Simultaneously by being configured with telecommunication, solar powered System can be done by automatic lifting weir gate height with realizing canal capacity adjustment and the transmission of stage-discharge automatic data collection To unattended, so that canal capacity measurement and control integration can be realized.
The present invention is directed to break through conventional sharp-crested weir to head loss, channel gradient, water body silt content application range limit System requires, to be submerged when overcoming water existing for traditional sharp-crested weir big, water hour generate the drawbacks of blocking water, so as to improve thin-walled The applicability of weir flow measurement.
For this purpose, being by the survey water method of existing sharp-crested weir will be using tradition the present invention provides a kind of improved method The fixed form of sharp-crested weir, the method for being revised as being measured with the weir plate of adjustment height.
In a specific embodiment of the invention ,-Fig. 5, device provided by the invention change traditional sharp-crested weir referring to fig. 2 Fixed form, provide it is a kind of lifting mechanism 2 is installed at 1 both ends of weir plate, can be by the drive of elevating mechanism 2, so as to adjust The height of whole weir plate 1, to realize the height-adjustable device of sharp-crested weir;The device includes weir plate 1 moving up and down, and is set to it The column 3 at both ends, lifting mechanism 2 can be set in the column 3, be additionally provided with control cabinet 4 in this embodiment.
Wherein, which, which crosses at water, is provided with 45 ° of sharp-edgeds, so that water can form stabilization when passing through from weir plate top Overflow;And canal bottom 5 has a weir plate accommodation groove 8 can accommodate weir plate 1 so that weir plate 1 can dive to canal bottom 5 with Under, while sealing strip 9 should be equipped between 8 upper end of accommodation groove and weir plate 1 to avoid silt entrance;At weir plate both ends, design is vertical Column can guarantee be installed after can form traditional sharp-crested weir needed for measuring condition, be to be marked by column and weir plate formation one Quasi- wide weir structure;In order to ensure the sealing of moveable part, 1 width of weir plate should it is 40mm wider than channel width B~ 100mm, it is wide come out be partially installed in column water stopping trough 6, finishing can be used or other sealing modes is taken (such as to add Sealing structure, using rubber weather strip etc.), with guarantee weir plate work the leak of the side Shi Bucong;It is heavy that 5 or less the canal bottom may be provided with Sand basin is provided with submersible sewage pump (not shown) in the settling pit, when can be used for depositing more in pond, can become silted up from its internal extraction Mud, the preferable settling pit is connected with accommodation groove 8, and the submersible sewage pump is preferably arranged at the bottom of accommodation groove 8, to guarantee weir plate Can dive to canal bottom hereinafter, without occur plug extremely, card lock phenomena such as;It is set at 2~5 times of 1 upstream of the weir plate weir crest maximum head It is equipped with water-level observation point, can be high (P) according to metering head (H) and weir to measure sluice head, pass through corresponding flow formula meter Calculated weir flow amount (Q).
There are three working conditions when the present invention uses:
(1) water blocking state.Under this operating condition, weir plate 1 is all risen, it can be used as a common gate at this time, as gear The purposes of water.Its schematic diagram is as shown in Figure 3.
(2) flow control and amount water state.Under this operating condition, weir plate 1 is moved down, and water flows through at the top of weir plate 1, at this time can be by control Case 4 processed adjusts flow by controlling the amount of moving down of weir plate 1;Entire weir gate forms a sharp-crested weir at this time, in a certain height of weir plate Under degree, by measuring the structure size of weir head and weir gate, the flow for flowing through weir gate can be calculated by formula.Work shape State signal is as shown in figure 4, equivalent measures intention as shown in Fig. 6 a and Fig. 6 b, and wherein in this specific embodiment: B=b+2T, T are Receive width in side.In this embodiment, using B=b (overall with weir), side contraction also can be used as other embodiments The structure on weir.
It can be public according to flow of the national standard " irrigation canal system quantities water specification " (GB/T 21303-2017) to sharp-crested weir Formula and application conditions do following calculating:
Using overall with weir flow formula:
In formula: Q --- cross weir flow amount (m3/s);
M --- discharge coefficient,
M=0.407+0.0533H/P;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
Flow formula application conditions:
0 < H/P < 6.
Weir head (H) is measured by the water-level gauge being mounted in column, the aperture that weir height (P) passes through adjusting weir plate It measures and, weir wide (b) is a constant.Under this state can be according to weir head, adjusting weir plate aperture can be adjusted, controls simultaneously Metered flow.
Since equipment weir height of the invention is adjustable, the reasonable cross-section of river can be optimized according to operating flux range and longitudinally received Contracting reaches optimal and crosses flow metering state, guarantee flow measurement precision, expand than (H/P), and with head loss as small as possible Measurement range.
In another embodiment of the present invention, it can be equipped with side pinch wall, have side to receive width T at this time and be greater than zero, use Contracted weir flow formula calculates:
In formula: Q --- cross weir flow amount (m3/s);
m0--- discharge coefficient,
B --- the nearly width of the channel degree (m) of row;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
Flow formula application conditions:
H/P < 0.5,
B > 0.15m,
P > 0.10m.
(3) draining and erosion and deposition state.Under this operating condition, it is concordant with canal bottom that weir plate drops to upper limb, can be drained, sand surfing The operation such as dredging;It is mounted on the overall with weir in the nearly slot of row of sufficient length, can be exchanged into standard section amount water law under this operating condition. As shown in Figure 5.
It is to be flowed according to than drop~area-method to calculate when flow shape is open channel uniform flow in open channel under the operating condition Amount, flow formula are as follows:
In formula: Q --- flow (m3/s);
A --- discharge section area (m2);
N --- canal bed roughness;
The hydraulic radius (m) of R --- the cross-section of river, R=A/X;
X --- wetted perimeter (m);
I --- channel water face is than drop (open channel uniform flow water surface gradient=canal bottom is than drop).
A kind of measurement water method and device thereof of the invention can be configured with remote communication module and solar powered system simultaneously System can go up and down weir gate height by automatically controlling, and realize that canal capacity adjustment, stage-discharge automatic data collection pass It is defeated, it can accomplish unattended, realization canal capacity measurement and control integration.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although referring to above-described embodiment pair The present invention is described in detail, it should be understood by a person of ordinary skill in the art that still can be to of the invention specific Embodiment is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, It is intended to be within the scope of the claims of the invention.

Claims (10)

1. a kind of measurement water method, which is characterized in that this method realizes that sharp-crested weir height is adjustable by adjusting the height of weir plate, When weir plate is displaced downwardly to flow control and amount water state, water flows through at the top of weir plate, and stream is adjusted by the control weir plate amount of moving down Amount, and water-level observation point is provided at 2~5 times of 1 upstream of the weir plate weir crest maximum head, to measure sluice head;It is entire at this time Weir gate forms a sharp-crested weir, under a certain predetermined altitude of weir plate, by measuring the structure size of weir head and weir gate, calculates The flow of weir gate is flowed through out.
2. a kind of 1 measurement water method according to claim, which is characterized in that this method has following three work shape State:
(1) water blocking state, under this operating condition, weir plate is all risen, the gate as a water blocking purposes;
(2) flow control and amount water state, under this operating condition, weir plate is moved down, and water flows through at the top of weir plate, to measure the stream for flowing through weir gate Amount;
(3) draining and erosion and deposition state, under this operating condition, weir plate drop to upper limb it is concordant with canal bottom to be drained, sand surfing dredging Operation.
3. a kind of 2 measurement water method according to claim, which is characterized in that when the sharp-crested weir is weir gate width and canal When the identical overall with weir of road width, the nearly slot of row of sufficient length can be utilized in working condition (3), standard section amount water law can be used Measure flow, flow formula are as follows:
In formula: Q --- flow (m3/s);
A --- discharge section area (m2);
N --- canal bed roughness;
The hydraulic radius (m) of R --- the cross-section of river, R=A/X;
X --- wetted perimeter (m);
I --- channel water face is than drop.
4. a kind of 1 measurement water method according to claim, it is characterised in that:
When this method is applied to overall with weir, the control control weir plate amount of moving down makes 0 < H/P < 6, constitutes an overall with weir, and calculate The formula of the flow of weir gate is flowed through out are as follows:
In formula: Q --- cross weir flow amount (m3/s);
M --- discharge coefficient,
M=0.407+0.0533H/P;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
5. a kind of measurement water method described in 1 or 2 according to claim, when being applied to contracted weir, it is characterised in that:
Because the contracted weir is equipped with side pinch wall, there is side to receive width T at this time and is greater than zero, calculated using contracted weir flow formula:
In formula: Q --- cross weir flow amount (m3/s);
m0--- discharge coefficient,
B --- the nearly width of the channel degree (m) of row;
B --- crest of weir width (m);
H --- weir head (m);
P --- weir height (m).
Flow formula application conditions:
H/P < 0.5,
B > 0.15m,
P > 0.10m.
6. a kind of measurement water installations, it is set among water channel, which is characterized in that the device includes: weir plate moving up and down, is set to The column at its both ends, and the lifting mechanism of the height of weir plate can be adjusted, and the weir plate that has at the canal bottom of the water channel accommodates Slot is provided with water-level observation point at the weir crest maximum head of 2~5 times of the weir plate upstream, to measure can accommodate mobile weir plate Sluice head.
7. 6 a kind of measurement water installations according to claim, which is characterized in that the weir plate width should be than water channel channel width Width, it is wide come out be partially installed in column water stopping trough.
8. 7 a kind of measurement water installations according to claim, which is characterized in that be equipped in column water stopping trough and match with the weir plate The movable water sealing structure of conjunction, to guarantee the weir plate work side Shi Bucong leak, and the weir plate accommodation groove upper end is equipped with and the weir plate The movable sealing structure of cooperation is to avoid silt entrance.
9. 6 a kind of measurement water installations according to claim, which is characterized in that the distance between on the inside of two columns It is equal with water channel channel width or be less than water channel channel width.
10. 6 a kind of measurement water installations according to claim, which is characterized in that water channel canal bottom is arranged below desilting for this Pond is provided with for extracting mud submersible sewage pump out in the settling pit, to guarantee the weir plate energy dive to canal bottom or less.
CN201811456624.9A 2018-11-30 2018-11-30 A kind of measurement water method and device thereof Pending CN109537537A (en)

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CN110714509A (en) * 2019-11-15 2020-01-21 中国水利水电科学研究院 Constant-current water replenishing system and method for river mouth and beach area of sediment-laden river
CN112052545A (en) * 2020-08-25 2020-12-08 水利部交通运输部国家能源局南京水利科学研究院 Urban surface runoff and pipe network confluence coupling method based on cellular automaton

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