JP2020108372A - Field water management system - Google Patents

Abstract

To provide field water management systems that can flexibly respond so that the required amount of irrigation water at a required time can be stably supplied to the field.SOLUTION: Provided is a field water management system that manages the supply of irrigation water to a field group 10 which is an assembly of a field 1, the system comprising: a field water supply schedule generation unit 21C that generates a water supply schedule for each field for a predetermined period of time; and a field water supply control unit 21B that controls a water supply apparatus of each field according to the water supply schedule generated by the field water supply schedule generation unit, the field water supply schedule generation unit being configured to order the fields to be water-supplied so that the predetermined water supply amount is maintained within a range that does not exceed the maximum allowable water supply amount supplied to the field group in the predetermined period of time.SELECTED DRAWING: Figure 3

Description

The present invention relates to a field water management system.

In recent years, a field water management system capable of automatically supplying water by remotely controlling a water supply device provided in each field has been put into practical use. For example, Patent Document 1 proposes a field water management system that determines a daily paddy field target water level according to the growth stage of rice and controls a water supply valve so that the paddy field water level falls within the vicinity of the target water level. ..

In addition, an irrigation water management system has been proposed in which the irrigation water taken out from the head works and led to the pumping station is distributed to each field group, which is a group of fields, through a water diversion work or the like. For example, in Patent Document 2, a parent pumping station for supplying water of a water source to each field group, and irrigation water supplied from the parent pumping station for receiving water and supplying it to each terminal field in the field group Proposal of an irrigation water management system that can distribute a predetermined amount of irrigation water from a water source to each field group by remotely controlling the sub-pumping station and direct diversion valve installed for each field group from the central management unit Has been done.

Patent Document 3 aims to appropriately distribute water to each field when irrigation water available in the field area is insufficient, and to improve the quality and yield of crops in the field area as a whole. A field irrigation system has been proposed.

The field irrigation system is configured to irrigate each field by controlling a water supply device installed in each field in a field area consisting of multiple sections, and can be used for the above field area within a predetermined period. The total irrigation water is divided by a predetermined value, and the water distribution amount determination unit that determines the water distribution amount to each field when distributing it to each field, and the water supply devices based on the water distribution amount. A farmland irrigation water management device having a control unit to operate is installed.

JP-A-09-65776 JP, 10-42726, A JP 2001-275501 A

However, in the field irrigation water management device described in Patent Document 3, when a fixed amount of irrigation water is uniformly supplied to a corresponding field area in a fixed period, a water supply pipe for supplying the irrigation water. There is a possibility that an inconvenient situation may occur in which sufficient water pressure cannot be obtained on the downstream side and the water cannot be supplied sufficiently during the period.

Also, depending on the farmer's cultivation plan and the crops and varieties cultivated in the fields, the time for supplying irrigation water to each field may differ from other fields, and there is a problem that it is not possible to respond flexibly to such cases. It may occur.

In view of the above-mentioned problems, an object of the present invention is to provide a field water management system that can flexibly respond so that a necessary amount of irrigation water can be stably supplied to a field at a necessary time.

In order to achieve the above-mentioned object, the first characteristic configuration of the field water management system according to the present invention is a field water management system for managing the supply of irrigation water to a group of fields, which is a group of fields, A field water supply schedule generation unit that generates a water supply schedule for each field in a period, and a field water supply control unit that controls the water supply device of each field according to the water supply schedule generated by the field water supply schedule generation unit, and the water supply The schedule generation unit is configured to order the fields to be water-supplied so that the predetermined water supply amount is maintained within a range that does not exceed the maximum allowable water supply amount supplied to the field group during the predetermined period. It is in.

Since the water is sequentially supplied to the ordered fields within a range that does not exceed the maximum allowable water supply amount, stable and efficient water supply can be achieved without lowering the water supply pressure.

The second characteristic configuration is that, in addition to the first characteristic configuration described above, the water supply schedule generation unit orders the fields to be water-supplied based on the number of valve mechanisms provided in the water supply device of each field. It is in.

When there are a plurality of water taps in the same field, it is more efficient to supply water to the water taps in the field at the same time.

In the third characteristic configuration, in addition to the above-described first or second characteristic configuration, the water supply schedule generation unit determines the field to be water-supplied based on the characteristics of the valve mechanism provided in the water supply device of each field. It is in the point of ordering.

If the characteristic of the valve mechanism, for example, the diameter of the valve mechanism is different, the amount of water supply per unit time is different. Since water is supplied so that a predetermined water supply amount is maintained, stable water supply is possible by ordering the fields to be water-supplied based on the diameter of the valve mechanism.

In the fourth characteristic configuration, in addition to any one of the first to third characteristic configurations described above, the water supply schedule generation unit orders the fields to be water-supplied based on the water supply priority of each field. It is in.

For example, when work schedules such as scraping are different from field to field, priority is given to the nearest planned field for water supply, so that subsequent work is not delayed.

As described above, according to the present invention, it is possible to provide a field water management system capable of flexibly responding so as to stably supply a necessary amount of irrigation water to a field at a necessary time.

Illustration of irrigation water equipment Illustration of the field Illustration of field water management system Flowchart showing the procedure for generating a schedule for field water supply Flowchart showing the procedure for accepting reservations for field water supply Flowchart showing the field water supply schedule generation procedure

The field water management system according to the present invention will be described below. In addition, the term field used in the following description means both a paddy field and a field, and a plurality of fields to which irrigation water is supplied from a common water supply system that is divided from a water source by a water diversion facility is referred to as a field group. .. Normally, irrigation water taken from a common water source is supplied to different field groups by a plurality of water supply systems divided by a water diversion work. In the following embodiment, a field for rice action will be described, but the same applies to a field field.

As shown in FIG. 1, the irrigation water equipment is a water supply equipment for supplying the irrigation water taken from a water source pond 130 such as a river or a lake to each field 1 via a water distribution pond 121. And each field 1 are connected by a water supply pipe 120 serving as a trunk line and water supply pipes 100 and 101 serving as branch lines.

The distribution reservoir 121 is a facility for storing the irrigation pumping water supplied to each farm group 10, and the irrigation water is pumped up by the pump of the pumping station 131 provided in the water source pond 130 to maintain a constant water level. The water supply pipe 120 is connected to the water supply port of the water distribution reservoir 121, and irrigation pumping is pumped by water pressure.

The main water supply pipe 120 is branched from the distribution reservoir 121 toward each field group 10, and a water diversion device 140 that functions as a water diversion worker for adjusting the amount of water supplied to each branched water supply pipe 100 is provided. Has been. That is, the irrigation water pumped from the distribution reservoir 121 is supplied to each field group 10 after the water supply amount is adjusted by the water diversion device 140.

The water supply pipe 100 serving as a branch line is also branched toward each farm field 1, and the branched water supply pipe 101 is connected to a water supply device 2 including a water tap for supplying water to each farm field 1. Further, each field 1 is provided with a drainage device 4 having a drain plug, and a drainage channel 9 is provided so that the water discharged from each field 1 via the drainage device 4 is discharged into a river.

As shown in FIG. 2, in the field 1, a water supply device 2 for guiding the irrigation water flowing through the water supply pipe 100 (101) to the field 1 through the water channel 3, a water in the field 1, and a discharge channel 5 are provided. A drainage device 4 for draining water to a drainage channel 9 is provided, and a wireless repeater 7 that can be connected to a communication network such as the Internet is installed near the field 1. Furthermore, a water level sensor 6 that measures the water level of the field 1 is provided.

The water supply device 12 and the drainage device 16 include a storage battery equipped with a solar panel SP, an electric motor that drives a water tap or a drain plug, a control circuit that controls the electric motor, a communication circuit that performs wireless communication via the wireless repeater 7, and the like. The motor, the communication circuit, and the like are operated by the electric power of the electric storage device that is provided and stores the electric power generated by the solar panel SP.

The communication circuit provided in the water supply device 2 and the drainage device 4 is configured to be communicable with the field water management server 21 via the wireless relay 7, and the field 1 detected by the water level sensor 6 or the state of the water tap or drain tap. The water level is transmitted to the field water management server 21, and the field water management server 21 is configured so that the water tap and/or the drain tap can be adjusted by remote control.

Returning to FIG. 1, each water diversion device 140 provided in each of the water supply pipes 120 and 100 connecting the distribution reservoir 121 and each field group 10 has a flow rate adjusting valve for water diversion, a control circuit for controlling the flow rate adjusting valve, and communication. A circuit is provided and is configured to be network-communicable with the irrigation water management server 31 via a communication circuit. The irrigation water management server 31 is configured to adjust the flow rate control valve by remote control.

The irrigation water pumped from the distribution reservoir 121 is supplied to the individual farm fields 1 forming each farm field group 10 after the flow rate is adjusted by the water diversion device 140.

Taking rice cultivation as an example, a sufficient amount of water is supplied to the field to carry out scratching, and deep water management is continued to protect rice for a while after rice planting. It is necessary to adjust the water level in the field according to the growth of rice, such as restarting intermittent irrigation after mid-dried to promote root growth and suppress increase of stems, and then drop water at the harvest time.

It is necessary to supply a large amount of water at the same time as the water supply period of each field overlaps, such as the time of scraping, so that a certain amount of irrigation water secured at the water source is evenly distributed to each field. Although the schedule is planned and managed, a sufficient amount of water may not be able to be supplied at that time even in the same field group depending on the water pressure of the water supply pipe, and the water tap will continue to be released even after the prescribed amount of water has been supplied. Water supply to other fields may be insufficient.

In addition, even in rice cultivation, the water supply timing may differ depending on the variety, and it is very difficult to plan and manage an appropriate amount of water supply at an appropriate time depending on the unique conditions of each field.

The field water management system according to the present invention is a system capable of appropriately supplying irrigation water according to the situation of each field managed by a farmer in order to flexibly deal with such a problem. A wide area farm water supply management system that manages the water supply of irrigation water to the farm field group 10 that is a group of farm fields 1 by connecting the server 31 and the farm water management server 21 via a communication medium such as the Internet. Built into.

Specifically, as shown in FIG. 3, the wide area farm water supply management system 200 includes a farm field water management system 20 and an irrigation water management system 30.

The farm water management system 20 includes a farm water management server 21, a terminal device 8 owned by a farmer, a water supply device 2 and a drainage device 4 provided in each farm 1, and the like. The field water management server 21 is provided with respective functional blocks of a water supply reservation reception unit 21A, a field water supply control unit 21B, and a field water supply schedule generation unit 21C. The terminal device 8 includes a portable terminal device such as a smartphone and a stationary terminal device such as a desktop computer.

The irrigation water management system 30 includes an irrigation water management server 31 and a water diversion device 140 that functions as a field group water supply amount adjusting device that adjusts the water supply amount from the distribution reservoir 121 to each field group 10. The total amount of water supply to each field group 10 is adjusted by the field group water supply amount adjusting device. The irrigation water management server 31 is provided with respective functional blocks of an allowable maximum water supply amount acquisition unit 31A, a field group water supply amount adjustment unit 31B, and a water supply schedule management unit 31C. In addition, below, the water diversion device 140 may be described as the field group water supply amount adjustment device 140.

Each of the servers 21 and 31 is provided with a CPU board, a memory board, a communication board, a large-capacity external storage device, etc., and an application program stored in a memory provided on the memory board is executed by the CPU mounted on the CPU board. As a result, each functional block described above is realized.

The irrigation water management server 31 generates a new receivable water supply schedule based on each water supply reservation information input from the field water management server 21, and outputs it to the field water management server 21. The timetable based on the water supply available schedule is presented to the terminal device 8, and when the water supply reservation request input from the terminal device 8 can be executed, the water supply reservation is accepted and the water supply reservation information is generated to generate irrigation water. It is configured to output to the management server 31.

The allowable maximum water supply amount acquisition unit 31A provided in the irrigation water management server 31 acquires the maximum allowable water supply amount for each farm group 10 within a predetermined period, and the water supply schedule management unit 31C and the water supply schedule generation unit of the farm water management server 21. It is configured to output to 21C.

The allowable maximum water supply amount refers to the maximum amount of water that can be supplied to each field group 10 per day out of the irrigation water obtained in the distribution reservoir 121. For example, for each pressure distribution of the distribution reservoir 121, The amount of water supply equally divided by the device 140 is calculated and stored in the external storage device of the irrigation water management server 31.

The water supply schedule management unit 31C provided in the irrigation water management server 31 determines that the total required water supply amount for each field group 10 is the maximum allowable water supply amount based on the field identification information, the water supply date/time information, and the water supply reservation information including the required water supply amount. It is configured to generate a water supplyable schedule including a water supplyable amount and a water supplyable date and time that are less than, store the water supplyable schedule in the memory on the memory board, and output the water supplyable schedule to the field water management server 21.

When the water supply schedule is input from the water supply schedule management unit 31C, the water supply reservation receiving unit 21 provided in the farm water management server 21 stores the water supply schedule in the memory on the memory board and requests the water supply schedule to confirm the reservation. It is presented to the terminal device 8. Then, it is determined whether or not to accept the water supply reservation request that specifies the water supply target field 1 and the water supply schedule input from the terminal device 8.

When the water supply reservation accepting unit 21 determines that the water supply reservation request can be executed according to the water supply available schedule, it accepts the water supply reservation request, and the field identification information, the water supply date/time information, and the required water supply amount corresponding to the water supply target field. It is configured to generate water supply reservation information including "and" to output to the water supply schedule management unit 31C.

The water supply reservation request transmitted from the terminal device 8 operated by the farmer includes information specifying the water supply target field and information specifying the water supply schedule indicating the water supply deadline for the field. It is possible to include a plurality of target fields for water supply and a plurality of desired dates or desired water supply times as the water supply schedule for each field. For example, the desired water supply time is specified by dividing the period from 0:00 to 24:00 at 6-hour intervals from the first period to the fourth period. The water supply deadline is the deadline for completion of water supply. Therefore, it is possible to start the water supply earlier with a margin.

Each field group 10 and each field 1 belonging to the field group 10 are stored in advance in the external storage device of the field water management system 20 and the irrigation water management system 30 as a field database, and the water supply reservation information database linked to the database is stored. Is stored.

In the field database, there are records composed of field group identification code, field identification code (field identification information), field location, owner code, contact information, field size, field hydrant model information, etc. It is stored.

The water supply reservation information database stores a record composed of field information such as date and time of water supply, required water supply amount, and water supply completion confirmation information, linked to the above-mentioned field identification code.

As described above, the water supply reservation information generated when the water supply reservation reception unit 21A receives the water supply reservation request includes the necessary water supply amount in addition to the field identification information corresponding to the water supply target field and the water supply date and time information. ..

The water supply reservation receiving unit 21A calculates the required water supply amount from the field size of the corresponding field and the target water depth of the field 1. For the water supply to the field 1, a target water depth is set for each management period, such as a deep water management period at the time of paddy scratching and rice planting, and a subsequent intermittent irrigation management period. For example, during the paddy scraping period, the water depth is 15 cm. Is predetermined.

This target water depth information is given in association with the water supply date/time information of the water supply reservation request from the terminal device 8. In this case, the water supply reservation receiving unit 21A calculates the required water supply amount from the target water depth, but the water supply reservation request may include information on the required water supply amount. Alternatively, the target water depth information may be held in the field database.

Since the water supply amount per hour is determined from the model information of the water faucet provided in the water supply device 2 provided in each field 1, the time required for water supply can also be obtained from the model information. Therefore, required water supply time information can be included in the required water supply amount.

The water supply reservation receiving unit 21A refers to the water supply available schedule to determine whether or not it is possible to supply the required amount of water in the field specified in the water supply reservation request and the water supply schedule. Receive and generate water supply reservation information.

When the water supply schedule management unit 31C receives the water supply reservation information from the water supply reservation receiving unit 21A, the water supply schedule management unit 31C stores the water supply reservation information in the water supply reservation information database, and also allows the maximum allowable water supply amount acquisition unit to respond to the next water supply reservation request. For each of the farmland groups 10 acquired by 31A, a water-supplyable schedule is sequentially updated and generated so that it can be determined whether or not water supply is possible based on the water supply reservation information within a range that satisfies the allowable maximum water supply amount.

The water-supplyable schedule clearly indicates the water-supplyable capacity in each period, for example, along a water supply day within a predetermined period and a time table in which one day is divided into first to fourth periods at 6-hour intervals. Since the water supply schedule is a water supply schedule that reflects the water supply reservation information received so far, the water supplyable date, time zone, and water supply amount will be indicated.

A farmer who makes an entry in the wide area farm water supply management system 200 and makes a reservation for water supply uses a schedule for water supply displayed on the terminal device 8, that is, a timetable displaying a water supplyable amount at a predetermined date and time, to a farm field that desires water supply. A water supply reservation request is made to the water supply reservation reception section 21A by making a judgment as to whether or not desired water supply is possible, and by inputting a water supply reservation so as to supply water on the day or date when water can be supplied. Set a specific day or date and make a water reservation request.

The procedure for generating the water-supply-enabled schedule executed by the water supply schedule management unit 31C described above is shown in FIG. 4, and the processing procedure for water supply reservation reception executed by the water supply reservation reception unit 21A is shown in FIG.

When the water supply schedule management unit 31C determines the water supply possible schedule in this manner, the field water supply schedule generation unit 21C provided in the field water management server 21 takes over the water supply available schedule, generates a specific field water supply schedule, and stores it. Memorized in.

Based on the water supply schedule described above, the water supply schedule generation unit 21C is a water supply target such that the predetermined water supply amount is maintained within a range that does not exceed the maximum allowable water supply amount that is supplied to the farmland group in a predetermined period. Order the fields. Since water is sequentially supplied to the pre-ordered fields within a range not exceeding the allowable maximum water supply amount, stable and efficient water supply can be achieved without causing a large fluctuation or decrease in the water supply pressure. In addition, it is premised that the water supply is simultaneously executed in a plurality of fields.

Specifically, the water supply schedule generation unit 21C sets, based on the water supply deadline defined in the water supply available schedule, a higher water supply priority to a field having the latest water supply deadline, and water is supplied from the field having a higher water supply priority forward. Order as you would. For example, when work schedules such as scraping are different from field to field, priority is given to the nearest planned field to supply water, so that there is no delay in subsequent work.

The water supply schedule generation unit 21C orders the fields to be supplied with water based on the characteristics of the valve mechanism provided in the water supply device 2 of each field. If the characteristic of the valve mechanism, for example, the diameter of the valve mechanism is different, the amount of water supply per unit time is different. Since water is supplied so that a predetermined water supply amount is maintained, stable water supply is possible by ordering the fields to be water-supplied based on the diameter of the valve mechanism.

In the present embodiment, the water supply schedule generation unit 21C generates a water supply schedule for each farm field. However, when the water supply schedule is generated for each faucet unit, the valve mechanism provided in the water supply device 2 of each farm field is used. It is preferable to order the fields to be watered based on the number. This is because, when there are a plurality of water taps in the same field, it is more efficient to supply water to the water taps in the field at the same time.

Then, the field water supply control unit 21B starts the water supply control based on the field water supply schedule generated by the field water supply schedule generation unit 21C and stored in the memory. That is, according to the field water supply schedule stored in the memory, the water supply device 2 provided in the field 1 corresponding to the field identification information is remotely controlled to open the water tap and supply water to the field 1.

Since the received water supply reservation request is automatically executed, the farmer is relieved from the troublesome operation of going to the field each time and manually operating the water supply device 1. At this time, it goes without saying that the drainage device 4 is remotely controlled and the drain plug is set in advance to the target water supply level.

When the water level detected by the water level gauge 6 provided in each field 1 is input to the water supply device 2, the water supply device 2 closes the water tap, and the detected water level is transmitted from the water supply device 2 to the field water management server 21. It The field water supply control unit 21B of the field water management server 21 determines that the water supply based on the received water level of the water level gauge 6 is completed based on the corresponding water supply reservation information, and the water supply to the field 1 is completed.

In addition, the field group water supply amount adjusting unit 31B remotely controls the field group water supply amount adjusting device 140 provided corresponding to each field group 10 based on the water supply reservation information to control the water supply amount to each field group 10. Is configured to adjust.

For example, it is possible to reduce wasteful water distribution by supplying water to each field group 10 in accordance with the water supply amount required for each predetermined period from the water supply reservation information.

The maximum permissible water supply amount to each field group 10 is, for example, a water supply amount obtained by evenly dividing the water amount pumped from the distribution reservoir 121 in each field group 10, and the reservation in each field group 10 is the supply amount. However, when the water supply amount of each field group 10 has a surplus, the allowable maximum water supply amount may be added with the surplus amount. In this case, the allowable maximum water supply amount is recalculated when the water supply reservation request is received. However, since there is a limit to the water supply amount of the field group water supply amount adjusting device 140, the maximum allowable water supply amount is set within a range not exceeding this limit.

FIG. 6 shows a procedure for generating a field water supply schedule by the water supply schedule generation unit 21C. When the water supply schedule is read from the water supply schedule management unit 31C (SC1), the order of the water supply target fields is set based on the water supply priority within the allowable maximum water supply amount, that is, in descending order of priority (SC2). In order to stabilize the amount, the order of the target fields for water supply is set based on the diameter of the water supply valve (SC3), and the field water supply schedule is determined (SC4). Note that steps SC2 and SC3 may be executed first, or only one of them may be executed.

The water supply schedule generation unit 21C may be configured to generate a field water supply schedule from a water supplyable schedule using a machine learning device. A graph search algorithm can be preferably used as a machine learning device.

The most efficient order for completing the water supply within the predetermined period will be searched for all fields included in the water supply schedule for the predetermined period.

For example, the number of hydrants installed in each field, the caliber of each hydrant, the distance from the reservoir 121 to each hydrant and/or the weighting coefficient normalized based on the height difference (the smaller the distance, the larger the value, Calculate the basic water supply time required for water supply to each field based on the larger the height difference, and the most imminent the water supply deadline for each field (the scheduled work date and time after water supply in each field) Normalized from the date and time to the date and time with the most margin, the weighting factor that makes a large value for the field that has the latest work schedule, the basic water supply time calculated earlier, and the maximum water supply that can be supplied in parallel On the basis of this, it is possible to configure to search for the most efficient order while allowing simultaneous parallel water supply.

In the above-described embodiment, the field water supply schedule provided in the field water management system 20 is generated based on the water supply schedule based on the water supply schedule, including the adjustment of the maximum allowable water supply, in cooperation with the irrigation water management system 30. Although an example in which the generation unit generates a water supply schedule that is actually executed in a field group has been described, it is affected by fluctuations in the maximum allowable water supply such as when the maximum allowable water supply for a predetermined period is fixed. If not, it is not necessary to generate the water supply schedule in cooperation with the irrigation water management system 30, and the water supply schedule can be set only by the field water management system 20. In this case, the function of the water supply schedule management unit 31C included in the irrigation water management system 30 may be provided to the field water supply schedule generation unit 21C included in the field water management system 20.

Further, the irrigation water management server 31 is provided with the functional blocks of the water supply reservation reception unit 21A and the field water supply schedule generation unit 21C, and the field water control unit 21B provided in the field water management server 21 is provided in the irrigation water management server 31. The field water supply control may be performed based on the field water supply schedule transmitted from the water supply schedule generation unit 21C. In this case, both the irrigation water management system 30 and the field water management system 20 are integrated to form the field water management system of the present invention.

The embodiment described above is merely an example of the present invention, and the technical scope of the present invention is not intended to be limited by the description, and the field water management system and the field water management server, the irrigation water management system, and the It goes without saying that the specific configuration of the irrigation water management server can be appropriately modified and designed within the range where the effects of the present invention can be obtained.

1: Field 2: Water supply device 3: Water guide 6: Water level sensor 8: Terminal 10: Field group 20: Field water management system 21: Field water management server 21A: Water supply reservation reception unit 21B: Field water supply control unit 30: Irrigation water Management system 31: Irrigation water management server 31A: Maximum allowable water supply amount acquisition unit 31B: Field group water supply amount adjustment unit 31C: Water supply schedule management unit 100: Water supply pipe (branch line)
120: Water supply pipe (main line)
121: Distribution reservoir 130: Water source reservoir 140: Field group water supply amount adjusting device 200: Wide area field water supply management system

Claims (4)

A field water management system for managing the supply of irrigation water to a group of fields, which is a group of fields,
A field water supply schedule generation unit that generates a water supply schedule for each field for a predetermined period,
A field water supply control unit for controlling the water supply device of each field according to the water supply schedule generated by the field water supply schedule generation unit,
Equipped with
The water supply schedule generation unit is configured to order the fields to be water-supplied so that the predetermined water supply amount is maintained within a range that does not exceed the maximum allowable water supply amount supplied to the field group during the predetermined period. Existing field water management system. The field water management system according to claim 1, wherein the water supply schedule generation unit orders the fields to be water-supplied based on the number of valve mechanisms provided in the water supply device of each field. The field water management system according to claim 1 or 2, wherein the water supply schedule generation unit orders the fields to be water-supplied based on the diameter of the valve mechanism provided in the water supply device of each field. 4. The field water management system according to claim 1, wherein the water supply schedule generation unit orders the fields to be water-supplied based on the water supply priority of each field.

Images