JP3080876B2 - Lawn management method and management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a management method and a management device for maintaining and promoting lawn growth, and more particularly to a management method and a management device for a lawn laid in an athletic stadium or the like.

[0002]

2. Description of the Related Art Facilities on which a lawn is laid include an athletic stadium and a golf course for sports such as baseball, soccer, and rugby. Recently, artificial grass is often laid in such facilities because it is easy to maintain and manage, but natural grass is still excellent in consideration of the necessity and safety in competition and the feel when using it .

[0003] This natural lawn is easily pained, and it is difficult to control water supply and drainage for growing. For this reason,
For example, a management device as shown in FIG. 6 has been proposed. This management device divides a water supply pipe a provided with a large number of diffusion holes for water supply into the soil below the lawn surface b as appropriate and buries it horizontally.
A water supply valve c is provided upstream of these water supply pipes a, and a control device d
By controlling the opening and closing of the water supply valve c, water is supplied from the water tank e by the pressure pump f to supply water.

[0004] As shown in FIG.
The crushed stone layer h is provided below, and a water supply pipe a is buried in the crushed stone layer h. An impermeable sheet j is laid under the crushed stone layer h to block water. I have to. Then, a humidity sensor k is embedded in the sandy layer g to detect the humidity of the soil relating to the growth state of the lawn, which is taken into the control device d, thereby controlling the pumping of the water supply by the pumping pump f and the water supply valve c. I am trying to do it.

[0005] Regarding drainage, the water supply pipe a is also used for drainage, and a drainage valve m is provided by branching upstream of the water supply valve c. In some cases, a suction pump n is provided and the drainage valve m is provided. The valve is opened to drain the water under a natural flow, or the water is forcibly sucked by the suction pump n to promote the drainage.

[0006]

However, in such a conventional apparatus, the water supply pipe a is pressure-fed by a pressure pump f.
Pressurized water sent into the soil in a pressurized state from the, it is easy to flow into the layer of low resistance and good water permeability in the soil, while it is difficult to flow into the large layer of poor resistance to poor water permeability,
Water supply is uneven. In addition, since water is not renewed in such a large layer of resistance where it is difficult to supply new water, old anaerobic water continues to stay in the rhizosphere of the lawn almost immobile. The retention of anaerobic water in the rhizosphere could cause lawn growth failure and disease outbreaks.

[0007] On the other hand, most of the nutrients in the soil are carried by the fine particles of the soil, but the pressurized water pushes away the fine particles and causes them to run off, making it difficult to maintain the nutrients necessary for growing the lawn. Had become. As described above, pressurizing the water supply and sending it to the lawn surface has many inconveniences for the lawn.

In addition, regarding drainage, a water supply pipe a for water supply which is buried horizontally in the past in consideration of uniform water supply to the grass surface b is also used for drainage. There is a problem that anaerobic water tends to stay in the soil and ventilation is poor, so that the environment in the rhizosphere of the lawn cannot be maintained well. Furthermore, although forced drainage is performed by the suction pump n, such drainage can be drained from a layer having good water permeability, but difficult to drain from a layer having poor water permeability,
In addition, there is a risk that not only surplus water but also water infiltrated into the soil by capillary action may be drawn in, so that unevenness of drainage on the lawn and soil nutrient This will cause problems such as runoff.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to supply water in a natural state without unevenness, to drain naturally naturally, and to secure good ventilation. It is an object of the present invention to provide a lawn management method and a management device that can maintain and manage the atmosphere environment of the rhizosphere of the lawn in good condition according to the state of the lawn.

[0010]

In order to achieve the above object, a lawn management method according to the present invention comprises forming an earthen tub in a soil under a lawn through a water-impervious layer, and forming the earthen tub on the bottom of the earthen tub. Burying a drainage system that collects gravitational water that extends outward from the earthen tub and flows down in the earthen tub by the action of gravity, and is provided with a water supply storage tank facing the earthen tub and through a permeable wall. The water in the water storage tank is diffused into the earth tank through the water permeable wall, and the water supply to the earth tank is adjusted by the water level of the water storage tank. 1).

According to such a lawn management method, water is supplied to the lawn by diffusing water from the water supply storage tank into the earth tank under the lawn through the water-permeable wall. And this water supply can be performed using the communication pipe action (siphon action) under the action of the difference in head pressure between the earth tank and the feed water storage tank and gravity. In other words, between the earth tank and the water supply tank, the water moves so that the water head pressure of both becomes equal, for example,
When the head pressure of the earth tank is lower than that of the water supply storage tank, water supply is gradually and spontaneously performed at a low water pressure as low as the pressure difference. Therefore, by controlling the water level of the water supply storage tank, it is possible to adjust the water level in the earth tank to a desired water level.

Further, the water supplied to the earth tank and at a considerable water level is further infiltrated into the soil due to the capillary action in the soil, and the water supply action at this stage is naturally performed. Therefore, there is no need for a water supply pipe or equipment for forcibly supplying water, and it is not necessary to bury these in the soil, and it is extremely easy to construct a lawn.

On the other hand, the drainage of the earth tank is carried out by utilizing the fact that surplus water flows down naturally due to the action of gravity, and the gravity water is discharged to the bottom of the earth tank and extended outward to be buried. Perform by collecting.

Further, in the lawn management method, the water supply into the earthen tub is adjusted by adjusting the water level of the water supply storage tank in accordance with data relating to the growth state of the lawn such as soil temperature, soil humidity and weather conditions. It is preferable to perform the above (claim 2).

As described above, if the water supply to the soil tank is controlled by adjusting the water level of the water supply storage tank in accordance with data relating to the growth state of the lawn such as soil temperature, soil humidity, and weather conditions, The atmosphere environment of the rhizosphere can be well maintained according to the lawn condition. As the data on the weather condition, atmospheric temperature, atmospheric humidity, insolation, rainfall, seasonal climate data and the like can be adopted.

Further, in the lawn management method, it is preferable that the quality of water supplied to the earth tank is adjusted according to data relating to water quality such as dissolved oxygen, PH, and electric conductivity of water in the earth tank. (Claim 3).

By adjusting the water quality of the water supplied to the earth tank in accordance with the data relating to the water quality in the earth tank, it is possible to satisfactorily maintain and manage the atmosphere environment of the rhizosphere of the lawn in terms of the water quality of the water supply. Can be.

On the other hand, the lawn management device of the present invention has a soil tank partitioned and formed in the soil under a grass surface via a water-impervious layer, and has the bottom of the soil tank extend outward from the soil tank. Buried, and a drainage system for collecting gravitational water flowing down by the action of gravity in the earth tank, and is provided side by side with the earth tank and through a permeable wall,
A water supply tank for supplying water from the water permeable wall to the earth tank (claim 4).

According to the lawn management device of the present invention having such a configuration, similarly to the operation in the above-described management method, the difference in head pressure from the water supply storage tank by the communication pipe operation (siphon operation) under the action of gravity. Thus, water can be naturally supplied to the earth tank, and gravity water in the earth tank can be collected via the drainage system.

In the lawn management device, it is preferable that a water-permeable layer communicating with the water supply storage tank via the water-permeable wall is laid on the bottom surface of the earthen tank.

In such a lawn management device, the water in the water supply storage tank can be uniformly supplied over the entire surface of the lawn through the water-permeable layer laid on the bottom surface of the earthen tank.

Further, in the lawn management device, it is preferable that the drainage system is set to have a downward slope toward the outside of the earthen tub.

In such a lawn management device, by burying the drainage system at a desired downward slope according to the local situation, gravity can be used without exerting a forced discharge pressure that adversely affects the underground environment. As a result, drainage can be naturally performed with high drainage efficiency.

Further, in the above lawn management device, the water supply storage tank is provided with a water level sensor for detecting the water level thereof.
It is preferable that the control means adjusts the water level of the water supply storage tank based on the detection signal of the water level sensor (claim 7).

As described above, the water level sensor is provided in the water supply storage tank,
If the water level of the water supply storage tank is adjusted by the control means in accordance with the detection signal of the water level sensor, the water supply control can be automated and the lawn management can be automatically controlled.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lawn management method and a management apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a lawn management apparatus according to the present embodiment, and FIG. 2 is a cross-sectional view schematically showing FIG.

The device for managing the lawn 1 according to the present embodiment is installed in, for example, an athletic stadium, and as shown in FIGS. An earth tank 7 partitioned and formed through a water sheet 15, a water distribution pipe 4 as a drainage system buried at the bottom of the earth tank 7, and a juxtaposition to the earth tank 7 and the water permeable wall 3 interposed therebetween. And a side groove 2 as a water supply storage tank.

As shown in the enlarged view of FIG. 3, the earth tank 7 is formed by digging a site where an athletic stadium is to be created and laying a water-impervious sheet 15 on the bottom surface thereof. Is formed by filling floor soil 10 and the like in multiple layers as the soil. In this embodiment, the soil on which the lawn 1 is laid has a two-layer structure in the order of the floor soil 10 and the second layer 12 in the downward direction.

In the present embodiment, the floor soil 10 is formed by filling a natural fiber mat with sand. According to this, the solidification of the floor soil can be prevented, the shear resistance is increased, and the occurrence of depots can be suppressed. Therefore, it is possible to provide a favorable soil environment for the grass roots.

On the other hand, the second layer 12 is a mixture of volcanic gravel, sand and a soil improving material.
The side groove 2 is buried horizontally so as to make contact. In addition,
In general, it is preferable that the soil composition of the second layer 12 is such that medium sand and coarse sand are sequentially stacked from top to bottom. In this case, the impermeable sheet 15 is laid so as to cover the drainage groove 14 filled with the single crushed stone, as described later, and prevents the fine particles in the soil from flowing out of the earth tank 7 while maintaining the drainage property. Work to ensure.

In this embodiment, a plurality of substantially U-shaped grooves 14 are formed below the second layer 12 at positions corresponding to the drain pipes 4. The drain pipe 4 is disposed in the groove 14 at a predetermined drain gradient, and is filled with single crushed stone. The groove 1
A drainage groove is formed at the bottom of the earthen tub 7 by the water-blocking sheet 15 laid under the base 4 so that drainage can be performed with high efficiency.

As shown in FIG. 5, a water permeable layer 16 communicating with the side groove 2 through the water permeable wall 3 is provided on the bottom of the earth tank 7, that is, on the upper surface of the water shielding sheet 15, over the entire area of the earth tank 7. It may be laid over. The water permeable layer 16 can be made of, for example, a permeable material having good water permeability. In this embodiment, the thickness of the water permeable layer 16 is set to about 100 mm.
As a result, the water in the side gutter 2 is transferred to the lawn 1 through the permeable layer 16.
Water can be supplied uniformly over the entire surface. In this case, if the lower surface of the water-permeable layer 16 is made to coincide with the lower end of the water-permeable wall 3, that is, the boundary between the water-permeable wall 3 and the concrete portion of the side groove 2, the water supply efficiency can be further improved.

The drain pipe 4 extends outward from the earth tank 7 and is piped, as shown in FIG. 2, for collecting excess gravity water r flowing down in the earth tank 7 by the action of gravity. And is collected in the collecting pipe 40 outside the earth tank 7. The drain pipe 4 has a large number of holes formed along the longitudinal direction and over the entire circumference, through which the gravity water r is collected. In the present embodiment, as shown in FIG. 1, the collecting pipe 40 is connected to a primary tank 61, and an opening / closing valve 41 controlled by the controller 5 is provided in the middle of the primary tank 61. Thereby, the amount of drainage from the earth tank 7 can be adjusted.

The drain pipe 4 is provided in the following manner. That is, as shown in FIG. 4 (a) or (b), a plurality of drain pipes 4 are arranged side by side at a predetermined interval so as to be parallel to the side groove 2 provided on one side of the lawn 1. It is buried separately on the left and right sides of one lawn, and is configured to drain water in a half area of one lawn.

In particular, as shown in FIG. 3B, the drain pipe 4 is provided with a downward slope α toward the outside of the earth tank 7 and a groove in which the drain pipe 4 is provided. The drain pipes 14 are also disposed at substantially the same gradient as the drain pipes 4 corresponding to the gradient α of the drain pipes 4. In this way, the drainage pipes 4 are buried successively outward of the earthen tub 7 at a downward slope α, so that gravity can be naturally applied without using a forced discharge pressure that adversely affects the underground environment. It can be drained with high drainage efficiency.

On the other hand, as shown in FIG.
In the present embodiment, the mortar 20, the concrete 21, and the crushed stone 22 formed on the outer peripheral portion of the earthen tub 7 are arranged on a base portion in which the mortar 20, the crushed stone 22, and the like are stacked. You. And in this embodiment, the impermeable sheet 1
5 is laid so as to cover the entire outer peripheral surface of the side groove 2 from the bottom of the side groove 2 to the outside thereof, and water supply from the side groove 2 to the earth tank 7 leaches to the outside from these gaps. To prevent it from happening.

As shown in FIG. 1, the water is stored in the gutter 2 by being supplied from a water supply facility described later. In this embodiment, the drain 2 is configured to return the drainage to the earth tank 7 through the collecting pipe 40, as shown in FIG. I have. That is, the drainage is returned to the water supply facility, and the drainage is returned from the water supply facility to the gutter 2.

In this embodiment, as shown in FIG. 2, an overflow pipe 2 is provided at the upper end of the side groove 2.
1 is installed, and is configured to be able to be drained from the gutter 2 when increased water due to rain or the like falling on the lawn 1 is returned through the collecting pipe 40. In the present embodiment, the gutter 2 is exemplified as the water supply storage tank, but the present invention is not limited to this, and the form is not limited as long as the water can be stored while maintaining the water level.

On the other hand, the side wall of the side groove 2 on the earth tank 7 side is a water-permeable wall 3 constructed of a member having water permeability. The water-permeable wall 3 is provided for the purpose of preventing the fine particles in the soil from flowing out and at the same time ensuring the drainage of the gravel layer. The permeable concrete used can be used.
This permeable concrete is formed by increasing the amount of coarse aggregate and decreasing the amount of fine particles, so that a continuous gap is formed therein.

In the lawn management apparatus and method according to the present embodiment having the above-described configuration, as shown schematically in FIG. 2, water is supplied from the gutter 2 under the lawn 1 surface. This is performed by diffusing into the earth tank 7 through the water permeable wall 3. That is, the water in the side groove 2 is supplied from the side groove 2 to the earth tank 7 at the head pressure by the communication pipe operation (siphon operation) under the action of gravity.

At this time, the water naturally moves in the earth tank 7 so that the water level L7 is substantially the same as the water level L2 of the gutter 2. Therefore, by controlling the water level L2 of the gutter 2. Water can be supplied such that the water level L7 of the earth tank 7 becomes a desired water level.

Then, the water supply s supplied to the earth tank 7 and at the considerable water level L7 is further infiltrated into the soil by the capillary action in the soil, and the water supply action at this stage is naturally performed. . As for the drainage (gravity water r), utilizing the fact that excess water flows down naturally by the action of gravity, the drainage is buried by extending outward from the earth tank 7 to the bottom of the earth tank 7. The gravity water r is collected and drained by the pipe 4.

At this time, the water is supplied to the lawn 1 by the natural water supply s and the drainage r of low water pressure utilizing the action of the communicating pipe and the action of gravity.
The infiltration of water s into the soil is extremely natural, and water can be satisfactorily supplied irrespective of the water permeability of the soil layer.
The generation of excess water and its flow-down action are natural, and there is almost no unevenness of water supply and drainage. Therefore, water supply s to the rhizosphere of the lawn can be maintained and managed well, and water supply and drainage s , R, etc., can be prevented.

When the water level L2 of the gutter 2 is changed, the water level L7 of the earth tank 7 also changes due to the communication pipe action.
When the water level L2 of the gutter 2 is adjusted so as to lower the water level L7 of the earth tank 7 (indicated by LC in the drawing), the foggy effect works and air is drawn into the earth tank 7 from the ground surface such as one lawn. As can be generated, an adjustable ventilation function can be obtained, and natural and good ventilation can be secured to the rhizosphere of the lawn without forcing and discharging.

Next, a facility for managing and operating the management device for the lawn 1 in this embodiment will be described. FIG.
As shown in (1), this management device is provided with a water supply facility such as a primary tank 61 and a secondary tank 63 for performing water supply and drainage, and a control device 5 for controlling these.

In the present embodiment, the water supply to the gutter 2 is configured to circulate the rainwater stored as described above and the return water from the drain pipe 4. More specifically, as shown in FIG. 1, rainwater is directly stored in the primary tank 61, and the drainage from the drain pipe 4 is returned to the primary tank 61.

The primary tank 61 is provided with an overflow pipe 62, which overflows when the primary tank 61 is full. Therefore, this overflow pipe 6
The water in the primary tank 61 is successively diluted by the overflow from the second tank 2, and the reforming is automatically adjusted to a water quality in which troubles hardly occur. In this way, water is supplied by using rainwater collected in the primary tank 61 and recycling wastewater.
Exhibits enormous water saving effects.

The water in the primary tank 61 is sent to a filter 64 by a pump 69 for purifying the dirt, and the purified water is stored in the secondary tank 63. A heating system 68 for heating water in the secondary tank 63 is connected to the secondary tank 63.

The heating system 68 includes a heat source 68a,
It mainly comprises a pump 68b for sending out a heat medium such as water heated by the heat source 68a. And the heat source 68
The heat medium is supplied to the secondary tank 63 from a by the pump 68b so that the water in the secondary tank 63 immediately before the water supply can be appropriately heated. By heating the water supply in this way, the water temperature can be adjusted, and the growth state of the lawn can be controlled. In this way, if necessary, if the heating system 68 is controlled in accordance with the detection data of the temperature sensor 51 in the soil, water is supplied to the lawn at a relatively high temperature in winter, and In summer, relatively low-temperature water can be supplied, and the lawn can be supplied with water corresponding to changes in the outside air temperature.

As the heat source 68a, natural heat or surplus heat can be used. For example, industrial waste heat, geothermal heat, hot spring heat, solar heat, fossil fuel, garbage incineration heat, and the like are preferably discarded. It is preferable to use unrecovered heat energy.

On the other hand, the water in the secondary tank 63 is sent to a chemical compounding mechanism 65 to which a chemical such as an insect repellent, an improving agent, or a liquid fertilizer is added. It is sent to the gutter 2. In the present embodiment, three pipes are connected between the secondary tank 63 and the medicine preparation mechanism 65. Each of the two pipes has a pump 70
Is provided, and the other one pipe simply connects the secondary tank 63 and the medicine preparation mechanism 65. A pump is not necessary when water can be supplied to the subsequent system with the water head pressure in the secondary tank 63. On the other hand, two pumps 70 are provided in two pipes to smoothly supply water in other cases. ing.

In the present embodiment, the primary tank 61, the secondary tank 63, and the like are controlled by the control device 5, and according to the data relating to the growing state of the lawn, the side grooves 2 are formed.
The water level of the water supplied to the water, that is, the water level in the side groove 2 is adjusted.

The control device 5 includes a medicine preparation mechanism 65,
Flow control mechanism 66, pumps 69 and 70, heating system 6
8 are connected, and these are appropriately controlled by the control device 5. The control device 5 includes the side grooves 2
Water level sensor 2a provided in the inside to detect the water level,
A humidity sensor 50 and a temperature sensor 51 for detecting humidity and temperature as soil environmental factors are connected. Both sensors 50 and 51 are buried in the soil under one lawn so that data relating to the growth state of the lawn can be obtained.

At this time, if necessary, water quality detection means 7 such as a DO (dissolved oxygen) sensor for water quality management, a PH (acid / alkali) sensor, and an EC (electric conductivity) sensor.
1, the water quality detecting means 71 may detect the quality of the supplied water, input the detected data to the control device 5, and control the medicine mixing mechanism 65 by the control device 5.

Further, the controller 5 detects and accumulates weather data such as atmospheric temperature, atmospheric humidity, solar radiation, rainfall, and seasonal climate data as weather condition data, and stores the data in a short-term or long-term. It may be configured such that various climatic conditions are analyzed and this can be taken into control. The control device 5 is a so-called computer, and controls each unit based on detection data sent from the water level sensor 2a, the humidity sensor 50, the temperature sensor 51, and the water quality detecting means 71 and the like. I have. In this way, if the water level sensor 2a is provided in the gutter 2 and the water level of the gutter 2 is adjusted by the control means 5 based on the detection signal of the water level sensor 2a, the water supply control can be automated and the lawn management can be automatically controlled. can do.

According to the equipment for managing and operating the lawn management apparatus described above, the water supply to the earth tank 7 is controlled by each equipment, and the water quantity is controlled by the lawn such as soil temperature and soil humidity and weather condition. The water level of the gutter 2 is adjusted according to the data relating to the growth state of the water, and the water quality is adjusted according to the data relating to the water quality detected by the water quality detecting means 71 such as a DO sensor, a PH sensor, and an EC sensor. By doing so, it is possible to satisfactorily maintain and manage the atmosphere environment of the rhizosphere of the lawn according to the state of the lawn.

The number of the primary tanks 61 may be one or plural. In the case of one piece, the pipe connecting this to the secondary tank 63 is simple and simple, while the primary tank 61 is large in size. Therefore, the installation space is not large in one place and the yield of rainwater or the like is improved, but the piping is complicated. As an example of the piping in the latter case, water may be supplied from a plurality of primary tanks 61 arranged in a distributed manner to any one of the primary tanks 61 using the siphon effect. further,
This device may be combined with a ground watering system for lawn leaf cleaning or emergency use.

Further, in the above embodiment, the case where the control is performed only by the control device 5 has been described. However, the control may be arbitrarily switched to perform the manual water supply control.

[0059]

As described in detail above, according to the lawn management method and the management apparatus of the present invention, natural water supply and drainage with low water pressure utilizing the communication pipe action and the action of gravity are used. Unlike forced water supply and drainage, the infiltration of water into the soil tank is extremely natural, and water can be supplied well regardless of the water permeability of the soil layers. The flow action is also natural, and there is almost no unevenness of water supply and drainage. Therefore, it is possible to maintain and manage the water supply to the rhizosphere of the lawn well, and the loss of nutrients in the soil due to the water supply and drainage. Can be prevented. Moreover, since such water supply is performed through the water permeable wall, there is no need to forcibly supply water or bury a water supply pipe in the soil, and it is extremely easy to create such a management device.

Further, when the water level in the water supply storage tank is adjusted so as to lower the water level in the earth tank, the foggy effect acts naturally, so that air can be drawn into the earth tank from the ground surface such as a grass surface. Natural and good air permeability can be ensured without relying on supply / discharge effects.

On the other hand, if the water supply to the soil tank is adjusted by adjusting the water level of the water supply storage tank in accordance with data relating to the growth state of the lawn such as soil temperature, soil humidity, and weather conditions, The atmosphere environment of the rhizosphere can be well maintained according to the lawn condition.

Further, if the quality of the water supplied to the earth tank is adjusted in accordance with the data relating to the water quality in the earth tank, the atmosphere environment in the rhizosphere of the lawn can be well maintained in terms of the quality of the water supplied. it can.

In addition, in such a lawn management device, the water in the water supply storage tank can be uniformly supplied over the entire surface of the lawn through the water permeable layer laid on the bottom surface of the earthen tub.

Further, by setting a downward slope in the drainage system toward the outside of the earth tank or burying the drainage system at a desired downward slope according to the local situation, adverse effects on the soil environment can be obtained. The drainage can be naturally performed with high drainage efficiency using gravity without applying the forced discharge pressure to be applied.

Further, if a water level sensor is provided in the water supply storage tank and the water level of the water supply storage tank is adjusted by the control means based on the detection signal of the water level sensor, the water supply control can be automated and the lawn management can be automatically controlled. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a lawn management method and a management device according to the present invention.

FIG. 2 is a sectional view schematically showing FIG.

FIG. 3 is a side sectional view showing a configuration of a soil structure in an embodiment of a lawn management method and a management device according to the present invention.

FIG. 4 is an explanatory diagram showing a piping layout in the embodiment of the lawn management method and the management device according to the present invention;
(A) is a schematic plan view, and (b) is a sectional view taken along the line AA of (a).

FIG. 5 is a side sectional view showing a configuration of a soil structure in a modified embodiment of the lawn management method and the management device according to the present invention.

FIG. 6 is a configuration diagram showing a conventional example of a lawn management device.

7 is a cross-sectional view illustrating a soil structure of a lawn portion in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lawn 2 Gutter (water supply tank) 3 Permeable wall 4 Drainage pipe (drainage system) 5 Control means (control device) 7 Earth tank 15 Waterproof sheet (waterproof layer) 71 Water quality detecting means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsumi Takahashi 1-24-1 Minami-Aoyama, Minato-ku, Tokyo Inside Obayashi Road Co., Ltd. (56) References JP-A-7-222533 (JP, A) JP-A Heihei 4-76101 (JP, A) JP-A-4-58836 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01G 25/06

Claims (7)

(57) [Claims] An earth tank is formed in a soil under a lawn surface with a water barrier layer interposed therebetween. The earth tank extends outward from the earth tank at the bottom of the earth tank, and the inside of the earth tank is affected by gravity. A drainage system for collecting gravity water flowing down is buried, and a water supply storage tank is provided to face the earth tank and through a water permeable wall, and water in the water supply storage tank is filled in the earth tank through the water permeable wall. And controlling the water supply to the earth tank according to the water level of the water supply storage tank. 2. The method according to claim 1, wherein the water supply to the earth tank is adjusted by adjusting the water level of the water tank in accordance with data relating to the growth state of the lawn such as soil temperature, soil humidity and weather conditions. The lawn management method according to claim 1, wherein the lawn management is performed. 3. The water quality of the water supplied to the earth tank is adjusted according to data relating to water quality such as dissolved oxygen, PH, and electrical conductivity of the water in the earth tank. 2
Lawn management method described in. 4. A soil tank partitioned and formed in a soil under a grass surface with a water barrier layer interposed therebetween, and is buried at the bottom of the soil tank so as to extend outward from the soil tank and be buried therein. A drainage system that collects gravity water flowing down by the action of gravity, and a water supply storage tank that is provided adjacent to the earth tank and through a water permeable wall, and supplies water from the water permeable wall into the earth tank. A lawn management device. 5. The lawn management device according to claim 4, wherein a water permeable layer communicating with the water supply storage tank via the water permeable wall is laid on a bottom surface of the earth tank. 6. The lawn management device according to claim 4, wherein a downward slope is set in the drainage system toward the outside of the earthen tub. 7. The water supply tank is provided with a water level sensor for detecting a water level of the water supply tank, and a water level of the water supply storage tank is adjusted by control means in accordance with a detection signal of the water level sensor. The lawn management device described in Crab.