CN107024456B - It is a kind of for predicting the clear water method of replacing in situ of river water body transparency - Google Patents
It is a kind of for predicting the clear water method of replacing in situ of river water body transparency Download PDFInfo
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Abstract
It is a kind of for predicting the clear water method of replacing in situ of river water body transparency, the present invention first carries out clear water displacement experiment in situ, obtain the characteristic curve diagram of clear water replacement rate C and water transparency, hydrodynamic force-water quality model is constructed by prototype measurement again, then hydrodynamic force-water quality model calibration is carried out, clear water project scale and effect are proved finally by hydrodynamic force-water quality model, clear water replacement rate and transparency relationship, to make water quality rise, the transparency of water body is up to standard, and reasonable clear water engineering of building can also save material resources, financial resources and manpower.
Description
Technical field
The present invention relates to Urban Water Environments to predict improvement field, specially a kind of for predicting the original of river water body transparency
Position clear water method of replacing.
Background technique
By the propulsion of the aggregate measures for the treatment of both manifestation and root cause of disease, it is preferable but most straight that urban rives analyze water quality from contamination index
The sense index water transparency of sight, coloration etc. are still ideal not to the utmost, and river water body transparency still maintains essentially in 30 ~ 50cm, thoroughly
Lightness compliance rate is at a fairly low before and after water quality promotes action, and (coloration is no more than 25, without obvious to the C class from water body sense index
Different epistasis, oil mark and other substances of aggregation smelt, must not contain floating, transparency differ greatly greater than 50cm) water body standard,
It is also very big with the desired value gap of the common people, it determines on the basis of existing water environment protection, dirt is cut by control source, water source is administered, living
Water extended surface, dredging perforation, the big task of ecological purified water five realize downtown area Water quality General Promotion.
Basis water quality, hydrodynamic force background data needed for the present invention obtains city clear water engineering by prototype measurement；Measure phase
Close water quality, hydrodynamic criterion carries out hydrodynamic force and water environmental response mechanism case study, announcement improvement network of waterways ecological environment key
The Hydrodynamic relationship of the factor；Predict clear water engineering proposal hydrodynamic force and water correction effect.
Marginal benefit: engineering or equipment one unit scale (such as storage capacity or installed capacity) institute of every increase at a certain scale
The benefit that can increase.
Hydraulics includes hydrostatics and hydrodynamics；Power under hydrostatics research liquid is static or relative static conditions
Rule and its application are learned, inquires into liquid internal pressure distribution, the pressure of liquid versus solid contact surface, liquid is to floating body and submerged body
The stability of buoyancy and floating body, to solve water storage container, transmission conduit, liquid-retaining structure, the structures for the Yu Shuizhong that rises and falls, such as water
Pond, water tank, water pipe, gate.The static load computational problem of dykes and dams, ship etc.；Under hydrodynamics research liquid motion state
Laws of Mechanics and its application, it is main inquire into pipe stream, channel flow, weir flow, aperture stream, jet stream Porous Media flowing law,
And the calculating of flow velocity, flow, the depth of water, pressure, hydraulic structure structure, to solve water supply and drainage, road bridges and culverts, farmland row
Knowledge question of water conservancy in filling, hydroelectric generation, waterlogging prevention, dredging waterway and port engineering.
Summary of the invention
1, the technical problem to be solved in the present invention
The purpose of the present invention is to provide a kind of for predicting the clear water method of replacing in situ of river water body transparency, with solution
Certainly the problems mentioned above in the background art: it is preferable that urban rives analyze water quality from contamination index, but most intuitive sense organ refers to
It is still ideal not to the utmost to mark water transparency, coloration etc., river water body transparency still maintains essentially in 30 ~ 50cm, transparency compliance rate
At a fairly low before and after water quality promotes action, (coloration is no more than 25, smells, must not contain without obviously different the C class from water body sense index
There are epistasis, oil mark and other substances of aggregation of floating, transparency to differ greatly greater than 50cm) water body standard, and blindness
Construction clear water engineering will cause waste, increase the investment of financial resources, material resources and manpower.
2, technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
It is a kind of for predicting the clear water method of replacing in situ of river water body transparency, the steps include:
(1), clear water displacement experiment in situ is carried out, the characteristic curve diagram of clear water replacement rate C and water transparency are obtained:
1. basic water quality and hydrodynamic force background data, choose city city needed for obtaining by data collection and prototype measurement
The characteristic point of district center area trunk river water level section is N number of；
Clear water displacement test in situ is carried out using clear water displacement apparatus in situ to N number of characteristic point 2. synchronizing, raw water is set: clear
Water is the clear water replacement rate of 10:0,9:1,8:2,7:3,6:4,5:5,4:6,3:7,2:8,1:9,0:10；
3. the water transparency after measurement displacement, obtains replacement rate (C=W clear/W former) according to test result and water body is transparent
The characteristic relation curve of degree；
(2), hydrodynamic force-water quality model is constructed:
1. by data collection and prototype measurement, basic water quality and hydrodynamic force background data needed for obtaining, using device for fetching water,
Sai Shi disk, tape measure, SS filter membrane, SS suspended filter, aluminium masking foil, marking pen, water sample bucket, test graduated cylinder, portable turbidity
Instrument, PH, dissolved oxygen meter and ADCP flow measuring device measure river water system water level Z, river width B, water quality, hydraulic radius R, flow area
A, flow Q and flow velocity u carries out section classification to downtown area trunk river；Measured profile: according to measured profile data structure
It builds；Generalization section: river mouth width, river bed to excalation profile data and the section for needing to encrypt, according to river actual measurement
The data such as width, riverbank elevation, bed level of the river, side slope ratio carry out generalizing processing；Interpolation section: when carrying out section encryption, according to
Existing section carries out linear interpolation；
2. determining that downtown area hydrodynamic force-water quality model need to create section number M altogether and model is built together river
Total length Skm, and introduce ten thousand m3/d of total volume V at water source；
3. the number on gate, pumping plant and weir that hydraulic structure needed for determining downtown area trunk river includes etc.；
RTC is write by Infoworks icm software to add scheduling rule to gate, pumping plant and weir；
4. different according to observation river is assigned in relation to the empirical value of artificial canal and natural river course in relevant references
Roughness initial value, the overall principle be high-level channel roughness be less than low level river, end face compared with wide river course be less than section it is relatively narrow
River；
5. constructing hydrodynamic force-water quality model by St.Vennant equation group and above-mentioned measurement data；
(3), to hydrodynamic force-water quality model calibration
1. carrying out calibration to model using prototype measurement water level, data on flows；
2. carrying out inverting meter to clear water engineering prototype observed result during prototype measurement using the channel roughness after calibration
It calculates, and calculated result and prototype measurement achievement is compared and analyzed；
(4), by hydrodynamic force-water quality model and clear water replacement rate and transparency relationship prove clear water project scale and
Effect:
1. introducing ten thousand ten thousand ten thousand ten thousand ten thousand m3/ of m3/d, V5 of m3/d, V4 of m3/d, V3 of m3/d, V2 of total volume V1 at water source by simulation
D is compared research to city emphasis river, and it is transparent to be respectively compared the river water that section under the conditions of each diversion total volume can reach
Degree, and reach the time required for 0.8m transparency, 1.0m transparency and 1.5m transparency；
2. the difference of each river in statistic of classification downtown area 0.8m transparency compliance rate within the scope of diversion scope carries out
Comparison, selects best diversion total volume, so that it is determined that clear water project scale.
Preferably, the St.Vennant equation and boundary condition and primary condition collectively constitute one-dimensional water flow movement
Definite problem.The one-dimensional Saint-venant Equations of description river Hydrodynamic Process are made of continuity equation and the equation of momentum:
In formula: x, t are respectively river longitudinal coordinate and time；N is roughness coefficien；Q, Z is respectively section flow and water level；
Q is the long side inbound traffics in unit river；A is flow area；U, R is respectively cross-section of river mean flow rate and hydraulic radius；The section evolution with distance rate for being water level when identical；G is acceleration of gravity；Bt=B+Bw, wherein B and Bw be respectively river width and
Additional beach width.
Preferably, the gate, pumping plant and the scheduling on weir are divided into two classes: the 1. actual schedule during prototype measurement；②
Scheduling when conceptual design.
Preferably, the roughness primary election result are as follows: choose 0.030-0.040 in trunk river.
Preferably, the clear water displacement apparatus in situ includes the first inclined ladder, and the upper end of first inclined ladder is connected with work
Make plate, the working plate is connected with the second inclined ladder far from one end of the first inclined ladder, and the first inclined ladder and the second inclined ladder are symmetrical, institute
Working plate is stated equipped with observation panel, the lower end of the working plate, which is fixed by the connecting rod, is connected with carriage mechanism, the bracket machine
Structure includes fixed ring, telescopic rod and pedestal, and the upper end of the fixed ring is fixedly connected with the connecting rod, the fixed ring and pedestal it
Between connected by telescopic rod, the telescopic rod is equipped with lock-screw, is equipped with observation device, the sight on the inside of the carriage mechanism
Surveying device includes upper bucket, flange and lower bucket, and the upper bucket and lower bucket pass through flanged joint；The working plate is equipped with storage box,
And the upper end of working plate is equipped with data board；The surface of the pedestal is equipped with anti-skid chequer；The lower end of the fixed ring and pedestal it is upper
End is equipped with corresponding annular groove, and the telescopic rod is slidably connected by annular groove and fixed ring and pedestal, the annular groove
Bottom is equipped with the slot to match with telescopic rod；The upper end of the pedestal is equipped with placing groove.
3, beneficial effect
Compared with prior art, the beneficial effects of the present invention are:
Clear water displacement experiment in situ is first carried out, obtains the characteristic curve diagram of clear water replacement rate C and water transparency, then pass through
Prototype measurement constructs hydrodynamic force-water quality model, then carries out to hydrodynamic force-water quality model calibration, finally by water
Power-water quality model, clear water replacement rate and transparency relationship prove clear water project scale and effect, to make water quality
Rise, the transparency of water body is up to standard, and reasonable clear water engineering of building can also save material resources, financial resources and manpower.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of observation device part of the present invention；
Replacement rate and water transparency characteristic relation curve in Fig. 3 embodiment；
Measuring frequency section water level comparison diagram in Pingjiang River river in Fig. 4 embodiment；
Measuring frequency section water level comparison diagram in hilly pond river in Fig. 5 embodiment；
Ancient city piece Pingjiang River river river water transparency in Fig. 6 embodiment；
Ancient city piece scholar river river water transparency in Fig. 7 embodiment.
Figure label explanation:
1, upper bucket；2, the first inclined ladder；3, working plate；4, observation panel；5, fixed ring；6, flange；7, telescopic rod；8, pedestal；
9, lower bucket；10, connecting rod；11, the second inclined ladder；12, lock-screw.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiment invented, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of protection of the invention.
It is a kind of for predicting the clear water method of replacing in situ of river water body transparency, step are as follows:
(1), clear water displacement experiment in situ is carried out, the characteristic curve diagram of clear water replacement rate C and water transparency are obtained:
1. basic water quality and hydrodynamic force background data, choose city city needed for obtaining by data collection and prototype measurement
The characteristic point of district center area trunk river water level section is N number of；
Clear water displacement test in situ is carried out using clear water displacement apparatus in situ to N number of characteristic point 2. synchronizing, raw water is set: clear
Water is the clear water replacement rate of 10:0,9:1,8:2,7:3,6:4,5:5,4:6,3:7,2:8,1:9,0:10；
3. the water transparency after measurement displacement, obtains replacement rate (C=W clear/W former) according to test result and water body is transparent
The characteristic relation curve of degree；
(2), hydrodynamic force-water quality model is constructed:
1. by data collection and prototype measurement, basic water quality and hydrodynamic force background data needed for obtaining, using device for fetching water,
Sai Shi disk, tape measure, SS filter membrane, SS suspended filter, aluminium masking foil, marking pen, water sample bucket, test graduated cylinder, portable turbidity
Instrument, PH, dissolved oxygen meter and ADCP flow measuring device measure river water system water level Z, river width B, water quality, hydraulic radius R, flow area
A, flow Q and flow velocity u carries out section classification to downtown area trunk river；Measured profile: according to measured profile data structure
It builds；Generalization section: river mouth width, river bed to excalation profile data and the section for needing to encrypt, according to river actual measurement
The data such as width, riverbank elevation, bed level of the river, side slope ratio carry out generalizing processing；Interpolation section: when carrying out section encryption, according to
Existing section carries out linear interpolation；
2. determining that downtown area hydrodynamic force-water quality model need to create section number M altogether and model is built together river
Total length Skm, and introduce ten thousand m3/d of total volume V at water source；
3. the number on gate, pumping plant and weir that hydraulic structure needed for determining downtown area trunk river includes etc.；
RTC is write by Infoworks icm software to add scheduling rule to gate, pumping plant and weir；
4. different according to observation river is assigned in relation to the empirical value of artificial canal and natural river course in relevant references
Roughness initial value, the overall principle be high-level channel roughness be less than low level river, end face compared with wide river course be less than section it is relatively narrow
River；
5. constructing hydrodynamic force-water quality model by St.Vennant equation group and above-mentioned measurement data；
(3), to hydrodynamic force-water quality model calibration
1. carrying out calibration to model using prototype measurement water level, data on flows；
2. carrying out inverting meter to clear water engineering prototype observed result during prototype measurement using the channel roughness after calibration
It calculates, and calculated result and prototype measurement achievement is compared and analyzed；
(4), by hydrodynamic force-water quality model and clear water replacement rate and transparency relationship prove clear water project scale and
Effect:
1. introducing ten thousand ten thousand ten thousand ten thousand ten thousand m3/ of m3/d, V5 of m3/d, V4 of m3/d, V3 of m3/d, V2 of total volume V1 at water source by simulation
D is compared research to city emphasis river, and it is transparent to be respectively compared the river water that section under the conditions of each diversion total volume can reach
Degree, and reach the time required for 0.8m transparency, 1.0m transparency and 1.5m transparency；
2. the difference of each river in statistic of classification downtown area 0.8m transparency compliance rate within the scope of diversion scope carries out
Comparison, selects best diversion total volume, so that it is determined that clear water project scale.
Further, what St.Vennant equation and boundary condition and primary condition collectively constituted one-dimensional water flow movement determines solution
Problem.The one-dimensional Saint-venant Equations of description river Hydrodynamic Process are made of continuity equation and the equation of momentum:
In formula: x, t are respectively river longitudinal coordinate and time；N is roughness coefficien；Q, Z is respectively section flow and water level；
Q is the long side inbound traffics in unit river；A is flow area；U, R is respectively cross-section of river mean flow rate and hydraulic radius；The section evolution with distance rate for being water level when identical；G is acceleration of gravity；Bt=B+Bw, wherein B and Bw be respectively river width and
Additional beach width.
Further, the gate, pumping plant and the scheduling on weir are divided into two classes: the 1. actual schedule during prototype measurement；②
Scheduling when conceptual design.
Further, roughness primary election result are as follows: choose 0.030-0.040 in trunk river.
Further, clear water displacement apparatus in situ includes the first inclined ladder 2, and the upper end of the first inclined ladder 2 is connected with working plate 3, work
Make plate 3 and be connected with the second inclined ladder 11 far from one end of the first inclined ladder 2, and the first inclined ladder 2 and the second inclined ladder 11 are symmetrical, working plate
3 are equipped with observation panel 4, and the lower end of working plate 3 is fixedly connected with carriage mechanism by connecting rod 10, and carriage mechanism includes fixed ring
5, the upper end of telescopic rod 7 and pedestal 8, fixed ring 5 is fixedly connected with connecting rod 10, passes through telescopic rod between fixed ring 5 and pedestal 8
7 connections, telescopic rod 7 are equipped with lock-screw 12, are equipped with observation device on the inside of carriage mechanism, observation device includes upper bucket 1, flange
6 and lower bucket 9, upper bucket 1 and lower bucket 9 are connected by flange 6；Working plate 3 is equipped with storage box, and the upper end of working plate 3 is equipped with note
Record plate；The surface of pedestal 8 is equipped with anti-skid chequer；The lower end of fixed ring 5 and the upper end of pedestal 8 are equipped with corresponding annular groove, stretch
Bar 7 is slidably connected by annular groove with fixed ring 5 and pedestal 8, and the bottom of annular groove is equipped with the slot to match with telescopic rod 7；
The upper end of pedestal 8 is equipped with placing groove.
Specific embodiment:
Selected characteristic point 73, Suzhou downtown area trunk river, carried out using clear water displacement apparatus in situ in situ
Clear water displacement test.Raw water is arranged: clear water 10:0,9:1,8:2,7:3,6:4,5:5,4:6,3:7,2:8,1:9,0:10's is clear
Water replacement rate, the water transparency after measurement displacement, obtains replacement rate (C=W clear/W former) and water transparency according to test result
Characteristic relation curve.Consider clear water replacement rate C as constant non-decaying pollutant, brings the big encirclement model in Suzhou into and counted
It calculates, obtains the C value of concern section, the transparent of each section is then determined by replacement rate and water body transparent print characteristic relation curve
Degree.This test apparatus is the drum experimental provision of the 2m high * 0.5m diameter of customization, and clear water is during test with tap water generation
It replaces, transparency is estimated as 2m, and raw water directly takes bottom water in table from korneforos, after replacing in proportion, surveys the examination of drum water transparency
73 selected points are tested, 3 curve graphs are obtained.
The creation of section has following 3 seed type in Suzhou downtown area hydrodynamic force-water quality model: 1. actual measurement is disconnected
Face: it is constructed according to measured profile data；2. generalization section: to excalation profile data and the section for needing to encrypt, foundation
The data such as river mouth width, river bed width, riverbank elevation, bed level of the river, side slope ratio that the river is surveyed carry out generalizing processing；3. interpolation
Section: when carrying out section encryption, linear interpolation, Suzhou downtown area hydrodynamic force-water quality mathematical modulo are carried out according to existing section
Type, which is created, builds 3681 sections, and model is built together river total length 153.6km.The required waterwork owner generally changed in model construction
To include gate, pumping plant and weir etc., be created in Suzhou and build 84, gate, pumping plant 54, movable overflow weir 2.Icm software passes through
Write RTC(Real Time Control) to add scheduling rule to lock station, pumping plant and weir.This project lock station, is overflow at pump lock
The scheduling on stream weir is divided into two classes: the 1. actual schedule during prototype measurement；2. scheduling when conceptual design.
It is initial that different roughnesses is assigned according to the empirical value in relation to artificial canal and natural river course in relevant references
Value.The overall principle is that high-level channel roughness is less than low level river, the section river relatively narrow less than section compared with wide river course.Roughness
Primary election result are as follows: main river (capable person river, face Don River, hilly pond river etc.) chooses 0.030-0.040.
Calibration is carried out to model using prototype measurement water level, data on flows, calibration result is as follows: main river: in disk door
It is 0.0370 that fosse n, which is 0.0304, capable person river n is 0.0385, faces Don River n, other rivers are between 0.0240-0.0438.
Using the channel roughness after calibration, inverting is carried out to the Suzhou clear water engineering prototype observed result during prototype measurement
It calculates, and calculated result is compared.Pingjiang River river and the hilly pond river measuring frequency section for choosing emphasis river, by calculated result and original
Type observing buoy compares and analyzes, water level comparison process See Figure 4 and Fig. 5.
River water level, flow, flow speed data calculated value and measured value size and fluctuation tendency in mathematical model all coincide
Preferably, water level mean error about 1.2cm during the water transfer of ancient city piece, water level mean error 2.9cm during hilly pond piece water transfer, in precision
Meet the application demand of experiment.
In model be provided with five kinds of diversion scopes selected, respectively 1,200,000 m3/d, 1,400,000 m3/d, 1,500,000 m3/d,
1600000 m3/d, 1,800,000 m3/d.It is compared research for selection Suzhou City emphasis river Pingjiang River river and scholar river, is compared respectively
The river water transparency that Pingjiang River river and scholar section can reach under the conditions of more each diversion scope, and reach 0.8m transparency,
Time required for 1.0m transparency, 1.5m transparency, such as Fig. 6 and Fig. 7.
The statistics each river in Suzhou downtown area is up to standard in ten thousand m3/d of 120-180, five kinds of diversion scope 80cm transparencies respectively
The difference of rate, ten thousand m3/d transparency of 120-150 is up to standard to be promoted obviously；In 1-2 days, ten thousand m3/d transparency of 150-180 is up to standard blunt
Line rises, and after 3d, ten thousand m3/d transparency compliance rate ascensional range of 150-180 is unobvious, marginal benefit decline.Therefore selection work
1,500,000 m3/d of journey scale is reasonable.
| Diversion scope | 1200000 m3/d | 1400000 m3/d | 1500000 m3/d | 1600000 m3/d | 1800000 m3/d |
| 1d | 12.5 | 22.5 | 30 | 35 | 42.5 |
| 2d | 40 | 52.5 | 62.5 | 70.5 | 75 |
| 3d | 70 | 78.5 | 82.5 | 83.5 | 85 |
| 4d | 75.5 | 81.5 | 84.5 | 85.5 | 88 |
| 6d | 82.5 | 90 | 92.5 | 95 | 97.5 |
1 five kinds of diversion scope 80cm transparency compliance rates of table
1,500,000 m3/d improvement of diversion works project scale is good.Under 1500000 m3/d scales, diversion two days later, hilly pond
River, Pingjiang River river improve to transparency 1.5m；Ancient city piece, hilly pond piece largely improve to transparency 1m, other section major part energy
Improve to transparency 0.8m.After diversion is stablized, ancient city piece, hilly pond piece major part river transparency 1.5m or more, the west of a city, south of a city north
Portion major part river transparency 1.0m or more；Clear water in situ displacement experiment is combined into Suzhou downtown area hydrodynamic force-water quality number
It learns model and carries out water transparency prediction, constructed hydrodynamic force-water quality model can preferably meet Suzhou downtown area
It is practical.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change, should be covered by the scope of protection of the present invention.
Claims (5)
1. a kind of for predicting the clear water method of replacing in situ of river water body transparency, it is characterised in that: step are as follows:
(1), clear water displacement experiment in situ is carried out, the characteristic curve diagram of clear water replacement rate C and water transparency are obtained:
1. basic water quality and hydrodynamic force background data, choose in the city of city needed for obtaining by data collection and prototype measurement
The characteristic point of heart district trunk river water level section is N number of；
Carry out clear water displacement test in situ using clear water displacement apparatus in situ to N number of characteristic point 2. synchronizing, setting raw water: clear water is
The clear water replacement rate of 10:0,9:1,8:2,7:3,6:4,5:5,4:6,3:7,2:8,1:9,0:10；
3. the water transparency after measurement displacement is closed according to the feature that test result obtains clear water replacement rate C and water transparency
Be curve, wherein C=W it is clear/W is former；
(2), hydrodynamic force-water quality model is constructed:
1. basic water quality and hydrodynamic force background data, use device for fetching water, Sai Shi needed for obtaining by data collection and prototype measurement
Disk, tape measure, SS filter membrane, SS suspended filter, aluminium masking foil, marking pen, water sample bucket, test graduated cylinder, portable transmissometer,
PH, dissolved oxygen meter and ADCP flow measuring device, measurement river water system water level Z, river width B, water quality, hydraulic radius R, flow area A, stream
Q and flow velocity u is measured, section classification is carried out to downtown area trunk river；Measured profile: it is constructed according to measured profile data；Generally
Change section: to excalation profile data and needing the section that encrypts, according to the river mouth width of river actual measurement, river bed width,
Riverbank elevation, bed level of the river, side slope carry out generalizing processing than these data；Interpolation section: when carrying out section encryption, according to existing
Section carries out linear interpolation；
2. determining that downtown area hydrodynamic force-water quality model need to create section number M altogether and model is built together river overall length
Skm is spent, and introduces ten thousand m3/d of total volume V at water source；
3. the number on gate, pumping plant and weir that hydraulic structure needed for determining downtown area trunk river includes；Pass through
Infoworks icm software writes RTC to add scheduling rule to gate, pumping plant and weir；
4. assigning observation river different roughness initial values according to the empirical value of artificial canal and natural river course, the overall principle is
High-level channel roughness is less than low level river, section and is less than the relatively narrow river of section compared with wide river course；
5. constructing hydrodynamic force-water quality model by St.Vennant equation group and above-mentioned measurement data；
(3), to hydrodynamic force-water quality model calibration
1. carrying out calibration to model using prototype measurement water level, data on flows；
2. Inversion Calculation is carried out to clear water engineering prototype observed result during prototype measurement using the channel roughness after calibration, and
Calculated result and prototype measurement achievement are compared and analyzed；
(4), clear water project scale and effect are proved by hydrodynamic force-water quality model and clear water replacement rate and transparency relationship
Fruit:
1. total volume V1 ten thousand m3/d, V2 ten thousand m3/d, V3 ten thousand m3/d, V4 ten thousand m3/d, V5 ten thousand m3/d at water source is introduced by simulation, it is right
City emphasis river is compared research, is respectively compared the river water transparency that section under the conditions of each diversion total volume can reach,
And reach the time required for 0.8m transparency, 1.0m transparency and 1.5m transparency；
2. the difference of each river in statistic of classification downtown area 0.8m transparency compliance rate within the scope of diversion scope, carries out pair
Than best diversion total volume being selected, so that it is determined that clear water project scale.
2. according to claim 1 a kind of for predicting the clear water method of replacing in situ of river water body transparency, feature
Be: the solution of determining that the St.Vennant equation and boundary condition and primary condition collectively constitute one-dimensional water flow movement is asked
The one-dimensional Saint-venant Equations of topic, description river Hydrodynamic Process are made of continuity equation and the equation of momentum:
In formula: x, t are respectively river longitudinal coordinate and time；N is roughness coefficien；Q, Z is respectively section flow and water level；Q is
The long side inbound traffics in unit river；A is flow area；U, R is respectively cross-section of river mean flow rate and hydraulic radius；For
Section evolution with distance rate when water level is identical；G is acceleration of gravity；Bt=B+Bw, wherein B and Bw is respectively river width and additional beach
Ground width.
3. according to claim 1 a kind of for predicting the clear water method of replacing in situ of river water body transparency, feature
Be: gate, pumping plant and the scheduling on weir is divided into two classes: the 1. actual schedule during prototype measurement；2. when conceptual design
Scheduling.
4. according to claim 1 a kind of for predicting the clear water method of replacing in situ of river water body transparency, feature
It is: the roughness primary election result are as follows: choose 0.030-0.040 in trunk river.
5. according to claim 1 a kind of for predicting the clear water method of replacing in situ of river water body transparency, feature
Be: the clear water displacement apparatus in situ includes the first inclined ladder (2), and the upper end of first inclined ladder (2) is connected with working plate
(3), the working plate (3) is connected with the second inclined ladder (11) far from the one end of the first inclined ladder (2), and the first inclined ladder (2) and second
Inclined ladder (11) is symmetrical, and the working plate (3) is equipped with observation panel (4), and the lower end of the working plate (3) passes through connecting rod (10)
It is fixedly connected with carriage mechanism, the carriage mechanism includes fixed ring (5), telescopic rod (7) and pedestal (8), the fixed ring (5)
Upper end be fixedly connected with connecting rod (10), between the fixed ring (5) and pedestal (8) by telescopic rod (7) connect, it is described to stretch
Contracting bar (7) is equipped with lock-screw (12), observation device is equipped on the inside of the carriage mechanism, the observation device includes upper bucket
(1), flange (6) and lower bucket (9), the upper bucket (1) and lower bucket (9) are connected by flange (6)；The working plate (3) is equipped with
Storage box, and the upper end of working plate (3) is equipped with data board；The surface of the pedestal (8) is equipped with anti-skid chequer；The fixed ring (5)
Lower end and the upper end of pedestal (8) be equipped with corresponding annular groove, the telescopic rod (7) by annular groove and fixed ring (5) and
Pedestal (8) is slidably connected, and the bottom of the annular groove is equipped with the slot to match with telescopic rod (7)；The upper end of the pedestal (8)
Equipped with placing groove.
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| CN117633721B (en) * | 2024-01-25 | 2024-04-09 | 水利部交通运输部国家能源局南京水利科学研究院 | Urban river network transparency prediction method driven by mechanism model and data in combined mode |
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| CN103559593A (en) * | 2013-11-22 | 2014-02-05 | 华中科技大学 | Lake group multi-target water quality and water quantity optimizing and scheduling method |
| CN103675224A (en) * | 2013-11-29 | 2014-03-26 | 河海大学 | In-situ real-time intelligent biological detection device and method for protecting river health |
| CN106053394A (en) * | 2016-07-20 | 2016-10-26 | 山东省科学院海洋仪器仪表研究所 | Method for inversely analyzing transparency of water body by virtue of inherent optical parameter |
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| CN103559593A (en) * | 2013-11-22 | 2014-02-05 | 华中科技大学 | Lake group multi-target water quality and water quantity optimizing and scheduling method |
| CN103675224A (en) * | 2013-11-29 | 2014-03-26 | 河海大学 | In-situ real-time intelligent biological detection device and method for protecting river health |
| CN106053394A (en) * | 2016-07-20 | 2016-10-26 | 山东省科学院海洋仪器仪表研究所 | Method for inversely analyzing transparency of water body by virtue of inherent optical parameter |
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