CN105046352B - Water supply network leakage loss calculation method based on blood vessel bionic principle - Google Patents
Water supply network leakage loss calculation method based on blood vessel bionic principle Download PDFInfo
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Abstract
Water supply network leakage loss calculation method based on blood vessel bionic principle, it is related to a kind of water supply network leakage loss calculation method.The problem of it is complicated that the purpose of the present invention is to solve prior art calculation methods, and calculating elements are not comprehensive enough, cannot achieve the Precise Diagnosis of water supply network leakage loss, makes the water unbalanced supply-demand of water supply network.The present invention is the following steps are included: step 1: water intake pumping station, booster station at different levels, adjusting building at different levels and the valve at different levels on water supply network are constructed the network model of water supply network according to pipe network node and pipeline information as pipe network node；Step 2: pipe network operating parameter is collected；Step 3: carrying out the calculating of water conveyance loss amount to node each in pipe network using Depth Priority Searching, obtains water supplying pipe network loss leakage situation.Calculation method of the invention is more reasonable, and calculated result is more accurate.
Description
Technical field
The present invention relates to water supply network leakage loss calculation methods, and in particular to the water supply network leakage loss based on blood vessel bionic principle
Calculation method belongs to water supply network technical field.
Background technique
The leakage loss of water supply network and planning and designing, construction management, pipeline location, duct length, pipe material and pipe age etc.
Factor is related.Water supply network pipeline is long, has a very wide distribution, and node is more, and node type is abundant, this examines the leakage loss of water supply network
It is disconnected to become difficult.
In terms of planning and designing, urban modernization construction degree is higher and higher, the construction pair of the facilities such as road, house and subway
Water supply network generates influence to a certain extent.In terms of construction management, certain units in charge of construction do not handle legal examination and approval procedures, apply
Pipe network is damaged during work accidentally, causes pipeline lacerated wound；Construction stage ground is not firm, caused by natural cause or other factors
Basis sinks to will increase pipeline stress, has a degree of destructiveness to pipeline, is easy to cause pipe network model.Pipeline location side
The leakage loss evaluation index in face, pipeline location difference water supply network is also different.In terms of pipe material, the corrosion resistant of pipeline, it is freeze proof and its
The properties such as resistance to compression and pipe network model are closely bound up.
Various countries are mainly from improving leakage loss control theory, improve soil's rigidity technology and equipment and study leakage loss Controlling model etc.
The Detection & Controling of aspect progress pipe network model.
1 improves leakage loss control theory: the research of pipe network model control theory has been had begun from foreign countries' eighties in last century,
Research finds that pipe network leakage and pressure of supply water have positively related relationship and close relation, reduces the effective measures of pipe network water leakage amount
It is that the problem of pressure of supply water and user's pressure demand are balanced without surplus, and such pipe network model controls is transferred to ductwork pressure control
The problem of on.The pipe network model method generallyd use has sound to listen the method for stopping leakage in the roof, passive detection method, hydrogen detection method and detections of radar method
Deng.
Such technology controls pipe network model from the basic reason for cause pipe network model, highly effective.But because control
Relationship is complicated, and influence factor is more, and pipeline is long and structure is complicated, it is not easy to control.
2 improve soil's rigidity technologies and equipment: the beginning of the eighties in last century, Britain, the U.S., Germany, France and Japan pipe
The equipment such as line position indicator, Multi probe correlator, leak detector, region water leakage monitoring instrument and Ground Penetrating Radar are succeeded in developing in succession, to leakage
The accuracy and reliability of damage detection, which has, greatly to be improved.
Such technology needs to be detected using hardware device, and installation, lower deployment cost are high, and there are required precisions and measurement to miss
The problem of poor aspect.
3 research leakage loss Controlling models: mainly including pipe network model diagnostic model and water leakage forecasting model.
Pipe network model diagnostic model: it is theoretical using genetic algorithm, transient hydrodynamics theory and steady-state flow, it is ground from physical characteristic angle
Study carefully pipe network to miss and obtained leak source diagnostic method.Such technology carries out leakage loss diagnosis, energy according to the different operating conditions of pipe network
It is enough used as waterpower Study on Simulation Model pipe network model situation, still rests on the laboratory simulations dummy run phase.
Water leakage forecasting model: prediction model is established on the basis of probability analysis method and statistical regression methods, is taken off
Show implicit leakage loss rule in the historical data, predicts the leakage loss trend in future time.The precision of such technological prediction model,
Accuracy and adaptivity etc. are to be improved.
Summary of the invention
It is complicated that the purpose of the present invention is to solve prior art calculation methods, and calculating elements are not comprehensive enough, cannot achieve
The Precise Diagnosis of water supply network leakage loss, the problem of making the water unbalanced supply-demand of water supply network.
The technical scheme is that the water supply network leakage loss calculation method based on blood vessel bionic principle, including following step
It is rapid:
Step 1: water intake pumping station, booster station at different levels, adjusting building at different levels and the valve at different levels on water supply network are made
The network model of the water supply network based on blood vessel bionic principle is constructed according to pipe network node and pipeline information for pipe network node；
The network model of the step 1 building specifically includes:
Water intake pumping station, booster station at different levels, the coordinate at different levels for adjusting building and valve at different levels on water supply network are collected,
Length, head node position, tail node position and the water (flow) direction information of water supply line；
Water intake pumping station, booster station at different levels on water supply network are to the impetus of water as human heart pushes away blood
Movement is used；Valve at different levels and adjusting building at different levels are to the adjustment effect of water as the acupuncture point of human body is to human body on water supply network
Adjustment effect, the valves at different levels refer to that exhaust valve, relief valve, surge shaft and water valve etc., the adjusting buildings at different levels refer to
Head-tank, surge tower etc.；
Using water intake pumping station and booster station at different levels as the promotion node of network model, using adjusting buildings at different levels as one
Grade adjusts node, adjusts node for valves at different levels as second level, the promotion node, level-one adjust node, second level adjusts node
It is the component units of network model with water supply line；Wherein, the attribute of component units " water supply line " includes length, head node
Position, tail node position and water (flow) direction；
Network structure soft model is established using the Object-oriented Technique of computer according to the component units；For subsequent
Water supply network Optimized Operation uses.
Three-dimensional visualization processing is carried out to the network structure soft model, water supply network network structure is obtained and shows model,
The network structure shows that model includes water supply trunk project threedimensional model and relief model.Intuitively realistically express water supply main line
Water supply main line in engineering, pumping plant, surge tower, air valve pit and monitoring station etc. items facilities and equipment and whole region or
The landform of regional area.
Step 2: pipe network operating parameter is collected, is monitored including pipe network SCADA system by real-time acquisition and monitor station
Flow information calculates each in pipe network according to the data on flows and network topology data of pipe network SCADA system institute real-time monitoring
Node water conveyance loss amount.
Step 3: the calculating of water conveyance loss amount is carried out to node each in pipe network using Depth Priority Searching, is supplied
Pipe network leakage loss situation.
The booster station at different levels, adjusting buildings at different levels and valve at different levels are the pipe network node that can monitor flow discharges,
The step 3 specifically includes:
The network model according to step 1 obtains the set M={ m that can monitor the pipe network node of flow discharges1,m2,...,
mn, wherein n indicates interstitial content, and can each to monitor the pipe network node serial number of flow discharges；
Since water intake pumping station node, each node in set M is attached using the method for depth-first search
The search in path obtains the set of paths p={ p that can be connected to1,p2,...,pj, wherein subscript j indicates path number, path set
Close p in pjIndicate that the path elements in set of paths, the node set that path elements are included are pmj={ pmj1,pmj2,...,
pmjw, pm in formulajwRefer to the pipe network node elements for monitoring flow discharges on pipe network, pmjwIn j indicate path number, pmjw
In w indicate node serial number, the path pjIn element since the water intake pumping station node to the waterline of intake area
Square upstream sequence arrangement；
The water conveyance loss of each node calculates in each path in execution route set p, the water conveyance loss that will be calculated
Water conveyance loss amount attribute value of the value as the pipe network node that can monitor flow discharges；
The stream that discharges water is monitored according to each in the water conveyance loss amount range and each path of pipe network model grading standard
The water conveyance loss amount of the pipe network node of amount carries out comparing calculation node by node, determines its leakage class；
The pipeline on network model is labeled according to the leakage class, obtains pipe network model result.
The method using depth-first search is attached the search in path to each node in set M, obtains
The path that can be connected to, specifically includes:
Obtain the set R={ r of water intake pumping station node1,r2,...,rS, wherein S indicates the number of water intake pumping station node；
Depth-first search is executed by source of each element in water intake pumping station node set R respectively, until having accessed
Until all nodes reachable from water intake pumping station node.
The water conveyance loss of each node calculates in the execution each path, the final water delivery for obtaining each node in each path
The method of penalty values are as follows:
The each node for being included to each path elements in set of paths p executes water conveyance loss value and calculates, water delivery damage
The calculation formula of mistake value l is:
Q indicates that the water attribute value of calculate node, v are indicated using calculate node as the downstream branch node of source node in above formula
Number, qkIt indicates using calculate node as the water attribute value of the downstream branch node of source node,Indicate that calculate node is
The aggregate-value of the water attribute value of all downstream branch nodes of source node obtains each path elements institute in set of paths p
Each node for including is water conveyance loss value set L, the L={ l on the branch line of source point0,l1,...ln}。
It is grouped statistics according to the pipe network node serial number of period and Ge Ke monitoring flow discharges, obtains the same period
The flow discharges aggregate-value that inside can respectively monitor the pipe network node of flow discharges obtains sequence C={ c of flow discharges aggregate-value1,
c2,...,cn, wherein n indicate interstitial content, flow discharges add up value sequence in element be negative value when, represent water (flow) direction with
Pipe network water delivery is contrary；When the element that flow discharges add up in value sequence is positive value, water (flow) direction and pipe network water delivery side are indicated
To identical, wherein point can need unrestricted choice according to the time at the beginning of the period, and the end time point of period can be with
It is subject to current time, the specific value range of period changes over time, calculates pipe network water leakage in real time to reach
The effect of loss；Point and end time point can also need unrestricted choice according to the time at the beginning of period.
The downstream direction be relative to water supply network source node along water flow direction.
The present invention has the effect that the present invention in the network model based on blood vessel bionic principle compared with prior art
On the basis of, with Depth Priority Searching carry out the calculating of pipeline section water loss, and according to pipe network model grading standard into
The ranking of row pipeline section leakage loss degree；It may be water supply network that pipe network model more than, which calculates obtained data,
Water demand and supply balance provides calculation basis when calculating.Compared with prior art, method of the invention is a kind of flexible measurement method, control
Relationship processed is simple, is easy diagnosis leakage loss pipeline section；The present invention is with the obtained data on flows of the existing SCADA system of water system
Basis realizes leakage loss situation according to the diverted flow specificity analysis of aqueous medium, has online real-time and data basis.
Detailed description of the invention
Fig. 1, flow chart of the invention；
Fig. 2, the network structure soft model schematic diagram before carrying out depth-first search, circle represents node in figure, and straight line represents
Water supply line, arrow direction are water (flow) direction；
Fig. 3, the network structure soft model schematic diagram after carrying out depth-first search and numbering, circle represents node in figure, circle
Interior number represents nodal scheme, and straight line represents water supply line, and arrow direction is water (flow) direction；
Fig. 4 marks the schematic diagram that network structure shows model according to leakage class, wherein figure a is there was only pipeline figure layer
Pipe network model situation schematic diagram, figure b is the pipe network model situation schematic diagram that threedimensional model has been superimposed outside pipeline；
The flow chart of element is searched in Fig. 5, depth-first of the invention.
Specific embodiment
A specific embodiment of the invention, the water supply network leakage of the invention based on blood vessel bionic principle is described with reference to the drawings
Loss calculation method, comprising the following steps:
Step 1: water intake pumping station, booster station at different levels, adjusting building at different levels and the valve at different levels on water supply network are made
The network model of the water supply network based on blood vessel bionic principle is constructed according to pipe network node and pipeline information for pipe network node；
Bionic principle: water supply network is similar to human vas network, and water supply line is similar to blood vessel, has multichannel connection
Property；Water in water supply line is similar to the blood in blood vessel, is a kind of medium flowed in the duct；Flow media was being run
Certain pressure can be all generated in journey to tube wall, if pressure is in the range of tube wall can be born, pipe network can be normally good for
Otherwise the operation of health is likely to result in the damage of tube wall, pipe network is made to be in inferior health operating status.With human vas network phase
Seemingly, tube wall bears the impurity deposited on pressure and tube wall and plays key effect, certain pipeline sheet to the health operation of water supply network
The attribute of body and the foeign element born similarly play the effect of cannot be neglected to the health of pipeline.
Leakage loss refers to pipe network water delivery in the process because of reasons such as Pipeline damage, engagement equipment damage, moisture evaporation and tube wall absorptions
And the water missed.
Water intake pumping station, booster station at different levels on water supply network are to the impetus of water as human heart pushes away blood
Movement is used；Valves at different levels on water supply network, such as: exhaust valve, relief valve, surge shaft and water valve and adjusting building at different levels, such as
Head-tank, to the adjustment effect of water as the acupuncture point of human body is to the adjustment effect of human body.
The network model of the step 1 building specifically includes:
Collect water intake pumping station, the booster station at different levels, the three-dimensional at different levels for adjusting building and valve at different levels on water supply network
Coordinate, title and type, length, head node position, tail node position and the water (flow) direction information of water supply line；
Using water intake pumping station and booster station at different levels as the promotion node of network model, using adjusting buildings at different levels as one
Grade adjusts node, adjusts node for valves at different levels as second level, the promotion node, level-one adjust node, second level adjusts node
It is the component units of network model with water supply line；The attribute of the water supply line includes length, head node position, tail node
Position and water (flow) direction；The booster station at different levels, adjusting buildings at different levels and valve at different levels are the pipe that can monitor flow discharges
Net node；
Network structure soft model is established using the Object-oriented Technique of computer according to the component units；
Three-dimensional visualization processing is carried out to the network structure soft model, to water conveying tunnel, terrain data, model data
Processing constructs water supply trunk project threedimensional model and relief model, and the water supply intuitively realistically expressed in water supply trunk project is dry
Line, the landform of the items facilities and equipment such as pumping plant, surge tower, air valve pit and monitoring station and whole region or regional area.
It obtains water supply network network structure and shows model.
Step 2: pipe network operating parameter is collected, is monitored including pipe network SCADA system by real-time acquisition and monitor station
Flow information.
If existing pipe network SCADA system acquisition and monitor station can monitor to obtain flow and then be used directly the monitoring flow
Value；Otherwise, the equipment for needing to lay monitoring flow in the pipeline section node for needing to judge leakage loss, and establish in matched data
Biography and storage system, in order to get data on flows.
Step 3: the calculating of water conveyance loss amount is carried out to node each in pipe network using Depth Priority Searching, is supplied
Pipe network leakage loss situation, and according to the ranking of pipe network model grading standard progress pipeline section leakage loss degree, it specifically includes:
The network model according to step 1 obtains the set M={ m that can monitor the pipe network node of flow discharges1,m2,...,
mn, wherein n indicates the set interior nodes number, and " is can each to monitor the pipe network node serial number of flow discharges, and be arranged
No is water intake pumping station " attribute；
Since water intake pumping station node, that is, water supply network source, using the method for depth-first search in set M
Each node is attached the search in path, obtains the set of paths p={ p that can be connected to1,p2,...,pj, wherein j indicates path
It numbers, p in set of paths pjIndicate the path elements in set of paths, path elements pjThe node set for being included is pmj=
{pmj1,pmj2,...,pmjw, pm in formulajwRefer to the pipe network node elements for monitoring flow discharges on pipe network, pmjwIn j table
Show path number, pmjwIn w indicate node serial number, the path pjIn element since water intake pumping station node to by water
The square upstream sequence of the waterline in area arranges；
The water conveyance loss of each node calculates in each path in execution route set p, final to obtain in each path respectively
The water conveyance loss value of node, using the water conveyance loss value being calculated as the water conveyance loss for the pipe network node that can monitor flow discharges
Measure attribute value；
The stream that discharges water is monitored according to each in the water conveyance loss amount range and each path of pipe network model grading standard
The water conveyance loss numerical quantity of the pipe network node of amount carries out comparing calculation node by node, determines its leakage class；To realize to respectively may be used
Monitor the ranking of the leakage loss degree of each branch's pipeline section of pipe network node downstream direction of flow discharges.The pipe network model etc.
Grade evaluation criteria can pre-define, as shown in table 1, the downstream direction be relative to water supply network source node along
The direction of water flow.
1 pipe network model grading standard of table
The pipeline on model, which is labeled, to be shown to network structure according to the leakage class, according to the pipe network being calculated
Synteny indicates the pipeline section in pipe network to leakage class in different colors or not, obtains pipe network model result.
The method using depth-first search is attached the search in path to each node in set M, obtains
The path that can be connected to, specifically includes:
The water intake pumping station is the water supply source of water supply network, obtains the set R={ r of water intake pumping station node1,r2,...,
rS, wherein S indicates the number of water intake pumping station node；
Depth-first search is executed by source of each element in water intake pumping station node set R respectively, until having accessed
Until all nodes reachable from water intake pumping station node, specifically:
A) from the arbitrary node r in water intake pumping station node set RiStart, wherein i ∈ (1,2 ..., S), node riFather
The value of nodal community is set as -1, and " access " attribute is set as " true ", with node riNumber be that keyword puts the node into
In queue QArray.It searches and node riThe child node of connection, child node set are denoted as RZ={ rz1,rz2,...,rzt,
Middle t indicates the number of the child node set RZ interior joint of node ri；
If b) the child node rz in child node set RZc" access " attribute be " true ", wherein c ∈ (1,
2 ..., t) then find next child node of sub- section set RZ；Otherwise, node rzcParent attribute value be set as node ri's
Number, " access " attribute is set as " true ", and puts the node in queue QArray by keyword of the number of the node.
C) it is searched for since any child node in child node set RZ, until having searched for from all of the child node
Path returns node r after having accessed all nodes reachable from the child nodei。
If d) riIt is not source point, then traces back in riThe vertex that attribute is " true " " has been accessed " before；Otherwise own in figure
The vertex for having path to communicate with source point has all been accessed from the reachable all vertex of source point, if the water supply network is connection
Figure, then ergodic process terminates, and otherwise continues to select a not yet accessed vertex as new vertex, continues to traverse.Finally
It is " true " that all nodes, which " have accessed " attribute, indicates that depth-first search finishes.
The network structure soft model reference example such as Fig. 3 institute of present embodiment carried out after depth-first search and number
Show, the size of the numerical value in circle of the sequencing of node traverses to indicate node indicates, the node circle being first traversed
The numerical value in node circle traversed after interior numeric ratio is small.
The water conveyance loss of each node calculates in the execution each path, the final water delivery for obtaining each node in each path
The method of penalty values are as follows:
It executes water conveyance loss value to each node that each path elements were included in set of paths p to calculate, water delivery
The calculation formula of penalty values l is:
Q indicates that the water attribute value of calculate node, v are indicated using calculate node as the downstream branch node of source node in above formula
Number, qkIt indicates using calculate node as the water attribute value of the downstream branch node of source node,Indicate calculate node
For the aggregate-value of the water attribute value of all downstream branch nodes of source node, each path elements in set of paths p are obtained
Each node for being included is water conveyance loss value set L, the L={ l on the branch line of source point0,l1,...ln}。
According to period such as hour, day, ten days, the moon, when can respectively monitor the pipe network node serial number classified statistic of flow discharges
Between section and flow discharges aggregate-value, obtain sequence C={ c of flow discharges aggregate-value1,c2,...,cn, wherein n indicates number of nodes
Mesh is the pipe network node setting water that can respectively monitor flow discharges using the pipe network node serial number that can respectively monitor flow discharges as tie
Attribute is measured, the numerical value of water is identical as the flow discharges aggregate-value, when the element that flow discharges add up in value sequence is negative value,
It is contrary with pipe network water delivery to represent water (flow) direction；When the element that flow discharges add up in value sequence is positive value, water flow side is indicated
To identical as pipe network water delivery direction.
Claims (8)
1. the water supply network leakage loss calculation method based on blood vessel bionic principle, it is characterised in that: the following steps are included:
Step 1: using water intake pumping station, booster station at different levels, adjusting building at different levels and the valve at different levels on water supply network as pipe
Net node constructs the network model of water supply network according to pipe network node and pipeline information；
Step 2: pipe network operating parameter is collected；
Step 3: the calculating of water conveyance loss amount is carried out to node each in pipe network using Depth Priority Searching, obtains water supplying pipe
Net leakage loss situation.
2. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 1, it is characterised in that: described
The network model of step 1 building specifically includes:
Water intake pumping station, booster station at different levels, the coordinate at different levels for adjusting building and valve at different levels on water supply network are collected, is supplied water
Length, head node position, tail node position and the water (flow) direction information of pipeline；
Using water intake pumping station and booster station at different levels as the promotion node of network model, using adjusting buildings at different levels as level-one tune
Valves at different levels are adjusted node by point successively, and the promotion node, level-one adjust node, second level adjusts node and confession
Water pipeline is the component units of network model；Wherein, the attribute of the water supply line includes length, head node position, periproct
Point position and water (flow) direction；
According to the connection relationship between the component units and each component units, net is established using the Object-oriented Technique of computer
Network structure soft model；
Three-dimensional visualization processing is carried out to the network structure soft model, water supply network network structure is obtained and shows model.
3. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 1, it is characterised in that: step
The two pipe network operating parameters of collecting include the flow information that pipe network SCADA system is monitored by real-time acquisition and monitor station.
4. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 1, it is characterised in that: described
Booster station, adjusting buildings at different levels and valves at different levels at different levels are the pipe network node that can monitor flow discharges, the step 3 tool
Body includes:
The network model according to step 1 obtains the set M={ m that can monitor the pipe network node of flow discharges1,m2,...,mn,
Wherein n indicates interstitial content, and can each to monitor the pipe network node serial number of flow discharges；
Since water intake pumping station node, path is attached to each node in set M using the method for depth-first search
Search, obtain the set of paths p={ p that can be connected to1, p2..., pj, wherein j indicates path number, p in set of paths pjTable
Show that the path elements in set of paths, the node set that path elements are included are pmj={pmj1,pmj2,...,pmjw, in formula
pmjwRefer to the pipe network node elements for monitoring flow discharges on pipe network, pmjwIn j indicate path number, pmjwIn w indicate
Node serial number, the path pjIn element since water intake pumping station node to intake area waterline square upstream sequence
Arrangement；
The water conveyance loss of each node calculates in each path in execution route set p, and the water conveyance loss value being calculated is made
For can monitor flow discharges pipe network node water conveyance loss amount attribute value；
Flow discharges are monitored according to each in the water conveyance loss amount range and each path of pipe network model grading standard
The water conveyance loss amount of pipe network node carries out comparing calculation node by node, determines its leakage class；
The pipeline on network model is labeled according to the leakage class, obtains pipe network model result.
5. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 4, it is characterised in that: described
The search in path is attached to each node in set M using the method for depth-first search, obtains the path that can be connected to,
It specifically includes:
Obtain set R={ r of water intake pumping station node1,r2,...,rS, wherein S indicates the number of water intake pumping station node；
Depth-first search is executed by source of each element in water intake pumping station node set R respectively, it is all until having accessed
Until the node reachable from water intake pumping station node.
6. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 4, it is characterised in that: described
The water conveyance loss for executing each node in each path calculates, the final method for obtaining the water conveyance loss value of each node in each path
Are as follows:
The each node for being included to each path elements in set of paths p executes water conveyance loss value and calculates, water conveyance loss value l
Calculation formula be:
Q indicates that the water attribute value of calculate node, v are indicated using calculate node as the number of the downstream branch node of source node in above formula
Mesh, qkIt indicates using calculate node as the water attribute value of the downstream branch node of source node,Expression calculate node is source
The aggregate-value of the water attribute value of all downstream branch nodes of node, each path elements obtained in set of paths p are wrapped
Each node contained is water conveyance loss value set L, L={ l on the branch line of source point0,l1,...ln}。
7. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 6, it is characterised in that: described
The calculating process of the water attribute value of calculate node includes: the pipe network node serial number according to period and Ge Ke monitoring flow discharges
It is grouped statistics, the flow discharges aggregate-value that can respectively monitor the pipe network node of flow discharges in the same period is obtained, obtains
The sequence C of flow discharges aggregate-value={ c1,c2,...,cn, wherein n indicates that interstitial content, flow discharges add up in value sequence
When element is negative value, it is contrary with pipe network water delivery to represent water (flow) direction；The element that flow discharges add up in value sequence is positive value
When, indicate that water (flow) direction is identical as pipe network water delivery direction.
8. the water supply network leakage loss calculation method based on blood vessel bionic principle according to claim 6, it is characterised in that: described
Downstream direction be relative to water supply network source node along water flow direction.
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| CN106649968A (en) * | 2016-10-21 | 2017-05-10 | 华北水利水电大学 | Visualization design system and method for village water supply pipeline network |
| CN107230021B (en) * | 2017-06-08 | 2020-05-26 | 桂林理工大学 | Method for screening leakage area of water supply pipe network |
| CN108090845A (en) * | 2017-12-04 | 2018-05-29 | 深圳万城节能股份有限公司 | Management of the use of water platform and management of the use of water method |
| CN109902846B (en) * | 2017-12-11 | 2023-06-02 | 北京亿阳信通科技有限公司 | Water supply network simplification method and system |
| CN108122074B (en) * | 2017-12-21 | 2021-09-17 | 北京工业大学 | Distribution method of water leakage amount in water supply pipe network model |
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