KR101791974B1 - GIS Based Method for Tracking Water Control Valve in Water Supply Pipe Network - Google Patents

Abstract

The present invention relates to a GIS-based water supply network monitoring method and system thereof, wherein (a) when a broken leaked water pipe is selected and inputted, the single water pipe tracking module collects the ID of the selected leak water pipe, Starting tracing to find the wastewater side to both sides of the wastewater; (b) a step of tracking the single water flow direction tracking module along the water pipe to find the wastewater and determining whether to branch to both sides of the selected water leakage water pipe; (c) if the selected leak water pipe is diverged to at least one of the plurality, the single water pipe monitoring module generates a plurality of threads (a primary thread) by another constant number of pipes branched based on the selected leak water pipe line; (d) assigning an ID of each of the branched branch pipes to each primary thread; (e) activating each of the primary threads, and (f) generating a list of number of steps and a list of steps of the water level, so that the number of steps The processing time can be drastically shortened, the customer can be identified quickly, and rapid decisions on the number of steps can be made.

Description

[0001] The present invention relates to a GIS-based water control system,

The present invention relates to a GIS-based water surface monitoring method and system for water terminal, more specifically, to a single water flow monitoring method based on GIS, thereby greatly shortening a single-task processing time for water leakage recovery in a water supply network The present invention relates to a GIS-based water supply network monitoring method and system for a water supply, which is capable of identifying a customer who is capable of promptly determining the number of customers and quickly determining the number of customers.

At present, the proportion of old water supply pipes which are not replaced in Korea is high, and problems related to water quality and leakage are scattered. That is, the water quality is contaminated when the water is transported by the water pipe due to the corrosion in the pipe, the generation of the capstone, the generation of the foreign matter and the peeling off of the coating, the cost is wasted due to the leakage of water, or the foreign matter or bacteria are inhaled .

It is one of the most important tasks to find the appropriate water supply quickly so that only a minimum number of water users (consumers) can be singled if the water pipe is to be separated in order to recover from the occurrence of such leakage accident. The wastewater is a valve installed in the pipeline to increase or decrease the flow rate of the water or to open and close the water.

However, most of the municipalities are currently looking for manual sewing to find the wastewater for a single sewer, and it takes a long time to recover the manual sewing work, which takes a long time to recover. It is subjective decision making and it is inevitable that reliability and expertise are lacking.

In other words, in the water supply pipe network, the existing leakage accident handling procedure is to accept an accident if a leakage accident occurs, and after the accident detection and field investigation, if leakage leakage repair work is performed, the leakage accident treatment is completed. As shown in Fig. 1, for the number of leak points, the position of the corresponding water level around the leak point is manually identified and identified, and the range of the number is identified as the subjective decision of the person in charge, The number of customers is checked and the number of customers is notified after a single notice is given to the customer.

Meanwhile, the prior art Korean Patent Registration No. 10-1472551 (Dec. 12, 2014) analyzes the water supply pipe network data including the pipe information of the water pipe, the position information of the water valve and the location information of the customer, A step of calculating the number of damage index by quantifying the damage that may occur due to the number of segments per segmented segment according to the quantification criteria index, A step of generating a segment segment by virtually simulating a state in which a new valve is added to a constant pipe in a selected segment review segment, The damage caused by the singular is quantified according to the quantification standard index, And determining a segmentation for the segmentation review segment according to a result of comparison between the calculated number of damage expectation index and the previously stored segmentation decision index, a water service pipe segment segmentation method is disclosed have.

However, since there is no specific method for dividing the segment to be isolated, it is not sufficient to solve the above problems.

Korean Registered Patent No. 10-1472551 (Dec. 12, 2014, entitled " Method and Apparatus for Separating Water Supply Network Segment)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a single water level monitoring method based on GIS, which can significantly shorten the processing time for single- GIS-based water supply network, which enables identification of customers in a swift range and enables rapid decision-making on the number of stations, as well as overcoming the problems of disconnection due to the change of a person in charge of a single task such as the local government .

In order to achieve the above-mentioned object, the present invention provides a method for detecting a leaked water pipe, comprising the steps of: (a) selecting a leaked leak water pipe and inputting the broken leaked water pipe, Starting tracking; (b) the single-stage wastewater-side tracking module (10) traces along the water pipe to find the wastewater and judges whether or not to branch to both sides of the selected leak water pipe; (c) if the selected leak water pipe is diverged to at least one of the plurality, the single water pipe monitoring module generates a plurality of threads (a primary thread) by another constant number of pipes branched based on the selected leak water pipe line; (d) assigning an ID of each of the branched branch pipes to each primary thread; (e) activating each of the primary threads, and (f) generating a list of steps and a stepwise list of steps.

Also, in the present invention, the step (a) is performed only when there is no wastewater in the selected leak water pipe.

In addition, the determination of branching in the step (b) may be made by determining the number of edge points of another constant pipe having the same coordinate (X, Y) as the edge point of the constant pipe on the GIS N _PIPE ) is determined based on N _PIPE = 0 means that the constant pipe is not branched, and N _PIPE > 0 means that the constant pipe is branched.

In the present invention, the step (e) of the present invention may further comprise: (e1) a single water level change tracking module for collecting the IDs of the assigned water pipes (branched water pipes) Starting tracing to find a ground level in a tracking progress direction; (e2) a step of monitoring a single water level change module, comprising the steps of: confirming whether a water level is present in the assigned water line; (e3) If there is a wastewater in the assigned water pipe, the single wastewater direction tracking module collects the corresponding wastewater ID, destroys the corresponding primary thread, and if the wastewater does not exist in the assigned water pipe, Determining whether or not the water pipe is branched in a tracking direction of the assigned water pipe while tracking along the water pipe assigned to the water pipe; (e4) if the assigned water pipe is not diverged, the single water pipe tracking module extinguishes the corresponding primary thread, and if the assigned water pipe is diverged, the single water pipe tracking module transmits another constant Generating a plurality of threads (secondary threads) as many as the number of threads; (e5) assigning the ID of each of the branched branch pipes to each secondary thread; (e6) activating each of the secondary threads, and (e7) activating each of the secondary threads, repeating the steps of (e1) to (e6) , A plurality of n-th threads are repeatedly generated from a plurality of tertiary threads, all the threads to be blocked for a single thread are found, and all the generated threads (a plurality of secondary threads, a plurality of n-order threads) The single stepwise declination tracking module includes a step of destroying the corresponding primary thread.

In the present invention, the determination of the presence or absence of the wastewater in the step (e2) may be made based on the number (N _PIPE-VALVE ) of the number of water level points having the same coordinates (X, Y) as the edge point of the water _pipe . If N _{PIPE -VALVE} = 0, there is no _divisor . If N _{PIPE -VALVE} = 1, the _divisor is present.

In addition, the present invention relates to a method of generating a singular value list, comprising the steps of: (g) (h) The single water level monitoring module is characterized by the step of deriving the singular value range.

In addition, the present invention provides a method for estimating the amount of generated water that can occur in a water pipe connected to a wastewater that is locked based on a range of numbers, And a step of deriving a function is added.

In addition, in the present invention, the proper-range tracking module calculates an actual generated amount (Q _red ) at a point where a wastewater is installed for all the wastewater sides of the wastewater variation list, and the generated water amount Q _red is a sectional area (A) (Q _red ) and the sum of a plurality of Q _{use values in} the flow direction existing after the water level are successively compared with each other to calculate a plurality of consumer usage amounts (Q _use ) is greater than an appropriate generation amount (Q _red ).

In addition, the present invention includes: a single water level change tracking module for generating a list of a water level and a water level to be blocked at the time of an accident using GIS data and finally deriving a range of a number of water levels; A fitness range tracking module for deriving a fitness range using GIS data, charge amount data, measurement data, and wastewater information generated by a single water level monitoring module; GIS data, charge amount data, and measurement data are acquired and stored in the GIS management system, the fee management system and the monitoring and control system, respectively, and the number of steps to store the water level information generated in the single water level monitoring module A pipe and a water level list DB.

As described above, the GIS-based water supply network monitoring method and system of the water supply network of the present invention can significantly shorten the processing time of the single operation for leakage recovery in the water supply network by providing a GIS-based single water flow monitoring method, It is possible to confirm the number of customers in the singular range, and it is possible not only to make quick decision on the number of singles but also to overcome the problem of singularity disconnection due to the change of the person in charge of singular work such as local governments.

FIG. 1 is a flow chart showing the process of accident identification and field survey among existing process procedures when a leakage accident occurs in a water supply network.
Figure 2 is a simplified representation of a portion of a water line in a particular area;
3 is a flow chart illustrating a GIS-based water surface network monitoring method for a wastewater according to the present invention.
FIG. 4 is a flow chart illustrating a process in which each thread is executed in a GIS-based water supply network stepwise descent path tracking method according to the present invention.
5 is a view illustrating a concept of determining a number of customers in a GIS-based water supply network monitoring method of a wastewater according to the present invention.
FIG. 6 is a diagram illustrating a concept of deriving a range of numbers in a GIS-based waterworks network single-strand water flow tracking method according to the present invention.
FIG. 7 is a diagram illustrating a concept of deriving an appropriate range in a GIS-based waterworks network single-strand water flow tracking method according to the present invention. FIG.
FIG. 8 is a flow chart illustrating a process of deriving an appropriate range in a GIS-based waterworks network single-strand water flow tracking method according to the present invention.
FIG. 9 is a conceptual diagram related to derivation of a range of the enemy number in the GIS-based waterway network shaking table method according to the present invention.
FIG. 10 is a block diagram showing a system related to a GIS-based water supply network single-stage water flow rate tracking method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the appended drawings and foregoing description are intended for purposes of illustration only and are not intended to limit the scope of the present invention. .

For example, FIG. 2 assumes a portion of a water line in a particular area, where water flows along each water line and must be searched for the water to be blocked in order to recover the leak of the broken line. In this case, it is necessary to check and dismantle the wastewater ⓐ ~ 차단 which is to be blocked for the number of steps. It is necessary to review the drawings one by one, and if the water network is complicated according to the site conditions, it takes a long time and leakage recovery work may be delayed. For reference, FIG. 2 is simplified for the sake of understanding. Hundreds of water pipes and wastewater are very complicated in actual site.

Accordingly, the present invention is an efficient method for tracking a wastewater path for a single waterpipe in a GIS-based water supply network. In addition, the present invention derives a list of water pipes and a water purification valve to be separated when a water leakage accident occurs, And generates a list of the appropriate range acceptance by deriving the range of the enemy (greenhouse) that may be caused by the leakage repair work. That is, the present invention traces the position of the water pipe and the water level connected to the breakage pipe, and finds the position of the water pipe to be blocked, thereby deriving the range of the number of steps and the range of the corresponding value. A concrete method of this will be described with reference to FIG. 3 and FIG. 4 as follows.

First, when a broken leaked water pipe is selected and inputted, the single stepwise fluctuation section tracking module 10 checks whether the selected leaked water pipe has a wipe (S10). In the present invention, if there is a wastewater flow in the selected leak water pipe, the pipe having the wastewater can not be selected.

In this case, the wastewater is installed in the water pipe to control the amount of water flowing. It is also referred to as a wastewater valve. When the wastewater valve is closed, the flow of water is reduced. When the wastewater valve is opened, the water flow is increased. When the wastewater valve is fully locked, Is stopped. In addition, the single-stage wastewater is the wastewater that is locked to make the singular. The wastewater is mainly installed in the branch of the water pipe, and is installed sparsely when it is based on the entire water pipe network.

On the other hand, the criterion for the existence of the water level is determined on the basis of the number (N _PIPE-VALVE ) of the water level points having the same coordinates (X, Y) as the edge points of the constant pipe on the GIS. That is, as shown in the following Table 1, if N _{PIPE -VALVE} = 0, there is no _divisor , and if N _{PIPE -VALVE} = 1, the _divisor is present. This is a standard when a program is executed on an algorithm for performing a single water level monitoring module 10 on a computer. For reference, on both sides of the wastewater, both sides of the water pipe have different IDs.

Next, if the selected water leakage water pipe does not have a wastewater side, the single wastewater side tracking module 10 collects the ID of the selected water leakage water pipe and starts tracking to find the wastewater side on both sides of the selected water leakage water pipe (S20). Of course, if one end of the selected leak water pipe is clogged, it is of course tracked only to one side.

Next, the single-stage wastewater-side tracking module 10 traces along the water pipe to find the wastewater, and determines whether or not the water is branched to both sides of the selected water leakage pipe (S30). Here, if one of the selected leak water pipes is not branched, one of the ends of the leak pipe is blocked, so that the selected leak water pipe will be directly formed into a loop list, and the other one of the selected leak water pipes will continue to be traced.

On the other hand, the criterion of whether or not the pipe is branched is based on the number of edge points (N _PIPE ) of other constant pipes having the same coordinates (X, Y) as the edge points of the water pipe on the GIS . Namely, as shown in the following Table 2, N _PIPE = 0 means that the constant pipe is not branched, and N _PIPE > 0 means that the constant pipe is branched. This is a standard when a program is executed on an algorithm for performing a single water level monitoring module 10 on a computer.

Next, if the selected leak water pipe is diverged to at least one side, the single water pipe monitoring module 10 can detect a plurality of threads (thread, Hereinafter referred to as a primary thread) (S40). Here, a thread is a set of executable code that is dependent on one main program executed in a computer and is executed independently, and one thread is independently executed independently as an independent program, so that several threads are independently executed simultaneously . In this way, the execution of multiple threads (processes) simultaneously in one operating system is called multitasking.

Next, the single water level change tracking module 10 assigns IDs of the branched water channels to each of the primary threads (S50).

Next, the single stepwise variable witness tracking module 10 activates each of the primary threads (S60), and the process according to the algorithm of each primary thread is similar to the steps S10 to S60 (FIG. 4) .

1) The single water flow rate tracking module 10 collects the ID of the assigned water pipe (branch pipe of another water pipe) and performs a trace to find the water pipe in the tracking direction of the assigned water pipe Start. Here, the tracking progress direction means one direction in which tracking is proceeded from the selected leak water pipe.

2) The single wastewater monitoring module 10 checks whether there is a wastewater on the assigned water pipe. If there is a wastewater flow in the assigned water pipe, the corresponding wastewater ID is collected and the corresponding primary thread is destroyed. That is, the algorithm of the corresponding primary thread is deleted. Here, the criterion for the presence or absence of the wastewater is the same as in Table 1 above.

3) If there is no wastewater in the assigned water pipe, the single wastewater monitoring module 10 tracks the water pipe assigned to find the wastewater, and determines whether the wastewater is to be branched in the tracking direction of the assigned water pipe. Here, if the allocated water pipe is not branched, the end of the water pipe is blocked, so that the single waterpipe tracking module 10 cancels the corresponding primary thread. That is, the algorithm of the corresponding primary thread is deleted. Herein, the branching judgment criterion is the same as in Table 2 above.

4) If the assigned water pipe is branched, the single water pipe monitoring module 10 may divide the number of the water pipes (hereinafter referred to as "Quot; thread ").

5) The single water level monitoring module 10 assigns each ID of each of the branched water channels to each secondary thread.

6) The single water-level-change tracking module 10 activates each of the secondary threads, and the process according to the algorithm of each secondary thread is the same as the process of the primary thread.

7) The process of the threads (a plurality of secondary threads, a plurality of n-th threads) is repeated (each thread activating step in Fig. 3 is the algorithm shown in Fig. 4 and each thread activating step in Fig. (The algorithm of FIG. 4 is repeated if the constant branch is continued), all of the generated threads (plural secondary threads, plural n-order threads) are found When it is finished in turn, the corresponding primary thread also extinguishes. That is, when all the threads (a plurality of secondary threads, a plurality of n-th threads) are sequentially terminated, the n-th primary thread is extinguished when a plurality of n-th threads are all terminated. It means that you have found all the divisors.

At this time, the single water level change tracking module 10 may check again whether all generated threads (primary thread ... n-th thread) have been terminated.

Meanwhile, the thread extinction criterion is N _PIPE Wow N _{PIPE -VALVE} condition, and N _PIPE = 0 or N _{PIPE -VALVE} = 1, the thread extinguishes. This is a standard when a program is executed on an algorithm for performing a single water level monitoring module 10 on a computer.

After step S60, the single water level monitoring module 10 collects the water pipe ID and the water level ID collected in the above process, and generates the water pipe list and the water level list (S70).

Here, the single-pipe list is a collection of water pipes (single pipes) that become a single number when the water level valve is locked, and the water level list is a collection of the water level valves necessary for separating a specific water pipe.

Next, the single water level monitoring module 10 generates a singular value list (S80). As shown in FIG. 5, a water supply pipe connected to the water pipe is extracted on the GIS and a single water consumer connected to the water supply pipe is derived. An ID can also be given to each customer.

Next, the single water level monitoring module 10 derives a singular value range. As shown in FIG. 6, a range of numbers including a singular pipe, a water pipe, and a singular value is derived, which can be divided into a boundary on the GIS or a different color.

Lastly, the enemy range tracking module 20 derives an enemy range (S90). FIG. 7 is a diagram showing a concept of deriving a range of a target in the present invention. Based on the range of numbers, the amount of generated water that can be generated in the water pipe connected to the locked water supply is calculated, and the range of the appropriate range is derived by comparing the water consumption of the water supply and the generated water. Generally, the enemy water (green product) occurs when opening and closing the drainage line, and the drainage water is used only in case of emergency, so it is caused by the surface rust due to the long unused use of the drainage pipe.

FIG. 8 is a flowchart for deriving an appropriate range, and FIG. 9 is a conceptual diagram related to derivation of a range for an optimum. We will refer to this as the calculation of the amount of the enemy water and the derivation of the range of the enemy water.

First, the enemy range tracking module 20 calculates an enemy quantity (Q _red ) at a point where the discharge side is installed for all the discharge side of the discharge side list using the discharge side list created above. The amount of generated water (Q _red ) is calculated by multiplying the cross-sectional area (A) of the water pipe with the wastewater side, by the range of the enemy water generation (L). Since the flow rate and the installation date of the wastewater are different according to the target area, the adaptation range (L) should be changed according to the characteristics of the site. However, as the flow rate is high and the elapsed years after the installation of the wastewater are longer,

That is, the formula for calculating the amount of generated water is given by Equation 1 below.

For reference, the following table 3 is an example of the coefficient value applied when estimating the generation range (L) of the enemy water, and it is a value according to the experimental value and the experience value.

Next, the enemy range tracking module 20 determines whether the enemy number is affected and derives a range of the enemy number. The adversary amount is opponent for suyongga by going flow into the end suyongga with or without branching compared to the sum of the opponent amount (Q _red) and a plurality of suyongga amount (Q _use) in a flow direction that exists after jesubyeon sequentially And judges whether it is influenced. Here, the usage amount of the customer is calculated by using the existing charge amount data, and the usage amount is used for a certain period of time from the time when the water is opened again. For example, the amount of use for 10 minutes from the time when the groundwater is reopened is obtained by interpolating the amount of the probe for 10 minutes in consideration of the season or day of the week in the existing charge amount data.

Furthermore, it is assumed that the cus- tomer that includes the point where the sum of the Q _use is greater than the Q- _red is larger than the Q- In other words, the criterion for judging the effect of the adversary is the quantity of the generated quantity (Q _red ) ≤ the quantity of the consumer (Q _use ).

The derivation of the fitness range of the fitness range tracking module 20 is performed by connecting the consumers located at the most distal end affected by the descending order of the descending order list. The discrimination range may be divided into a boundary on the GIS, You may.

3 is performed by a program in which an algorithm is directly coded through a program language in order to perform it with a computer.

FIG. 10 is a block diagram of a GIS-based system relating to a water supply network single-stage water flow monitoring system according to the present invention. As shown in FIG. 10, a GIS-based water supply network single- 10, an appropriate range tracking module 20, a single wastewaterdetection range and an appropriate range tracking DB 30, a single water pipe and a wastewater flow list DB 40. [ Some modules have been described above, but they are described in detail below.

GIS data, charge amount data, and measurement data are required for the single wastewater discharge and the tracking of the appropriate range. Each data is acquired from the GIS management system, the charge management system and the monitoring control system, .

The single water level monitoring module 10 uses the GIS data to generate a list of water level and water level pipes to be cut off at the time of an accident, and ultimately derive a range of the water level. Here, the GIS data includes data on a water pipe, a water pipe, a wastewater, a customer and a durable years, and each data can be displayed on a GIS by layers. Here, unique IDs are assigned to each of the water pipes, water pipes, wastewater, and consumers of each layer.

The appropriate range tracking module 20 uses the GIS data, the charge amount data, the measurement data, and the descreened information (stored in the singular pipe and the descending order list DB) generated by the single water level tracking module 10, . Here, the measurement data is data on the flow rate in the constant pipe of the monitoring control data in the monitoring control system.

Accordingly, the present invention can reduce the number of single-task processing time for leak recovery in the water supply network by providing a single GIS-based tracking method for single wastewater, Decision-making is possible.

10: Singular water level monitoring module
20: Tracking module
30: Singular water level fluctuation and track range
40: Sampling pipe and water level list DB

Claims (9)

(a) selecting and entering a broken leak water pipe, the single faucet tracking module 10 collects the ID of the selected leak water pipe and starts tracing both sides of the selected leak water pipe to find the wastewater;
(b) the single-stage wastewater-side tracking module (10) traces along the water pipe to find the wastewater and judges whether or not to branch to both sides of the selected leak water pipe;
(c) if the selected leak water pipe is diverged to at least one side, the single waterwatch tracking module (10) generates a plurality of threads (primary threads) by the number of different constant pipes branched on the selected leak water pipe basis;
(d) assigning the ID of each of the branched branch pipes to each primary thread;
(e) the single water level monitoring module 10 activates each of the primary threads;
(f) the single water level monitoring module 10 generates a water level list and a water level list;
(g) the single water level monitoring module 10 generates a singular value list;
(h) deriving a singular value range for the single water level monitoring module 10, and
(i) The Reward Range Tracking Module 20 calculates the amount of generated water that can be generated in the water pipe connected to the wastewater that is locked based on the range of numbers, and compares the water consumption of the water supply and the generated water quantity Step,
The adversary range tracking module 20 is to calculate the rival amount (Q _red) of the point jesubyeon is installed on all of the jesubyeon jesubyeon list adversary amount (Q _red) is the following equation,

Respectively,
The appropriate range is determined by sequentially comparing the sum of the enemy water discharge amount Q _red and the plurality of water _use amounts Q _{use in} the flow direction existing after the water sweeping side so that the sum of the plurality of the water _use usage amounts Q _use becomes the _{red water} generation amount Q _red ) Of the GIS-based water supply network.
The method according to claim 1,
Wherein the step (a) is performed only when the selected leak water pipe does not have a wastewater side.
The method according to claim 1,
In step (b), whether or not the branch is determined is determined based on the number of edge points (N _PIPE ) of another constant pipe having coordinates (X, Y) equal to the edge point of the constant pipe on the GIS , And N _PIPE = 0 means that the constant pipe is not branched, and N _PIPE > 0 means that the constant pipe is diverged.
The method according to claim 1,
The step (e)
(e1) The single water level change tracking module 10 collects the IDs of the assigned water pipes (branched water pipes) and performs a tracking for finding the water pipes in the tracking direction of the assigned water pipes ≪ / RTI >
(e2) the single water level monitoring module 10 checks whether the water level is present in the assigned water line;
(e3) If there is a wastewater on the assigned water pipe, the single wastewater direction tracking module 10 collects the corresponding wastewater ID, destroys the corresponding primary thread, and if there is no wastewater on the assigned water pipe, (10) includes a step of determining whether or not to branch in a tracking progress direction of the assigned water pipe while tracking along a water pipe assigned to search for a wastewater;
(e4) If the assigned water pipe is not branched, the single waterpipe tracking module 10 extinguishes the corresponding primary thread, and if the assigned water pipe is branched, the single waterpipe tracking module 10 transmits the assigned water pipe standard Generating a plurality of threads (secondary threads) for another constant number of branches branched to the plurality of threads;
(e5) The single water level change tracking module (10) assigns each ID of each branched water channel to each secondary thread;
(e6) the single wastewater monitoring module 10 activating each secondary thread, and
(e7) Activation of each secondary thread is repeated by repeating the steps of (e1) to (e6), and if a constant pipe branching is continued, a plurality of n-th threads are repeatedly generated from a plurality of tertiary threads, And the single-stage water-level-change tracking module 10 also destroys the corresponding primary thread when all the generated threads (a plurality of secondary threads, a plurality of n-order threads) are sequentially terminated GIS - based waterworks network.
5. The method of claim 4,
In step (e2), the determination of the presence or absence of the water level is made on the basis of the number (N _PIPE-VALVE ) of the number of stepwise change points having the same coordinates (X, Y) as the edge point of the constant pipe on the GIS. _{PIPE -VALVE} = 0 means that there is no _divisor , and if _{PIPE -VALVE} = 1, the _divisor is present.
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