JPH0677734B2 - Golf course with pesticide purification structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a golf course, and more particularly to a golf course provided with a structure capable of purifying sprayed agricultural chemicals.

(Prior Art) In recent years, the development of golf courses has been remarkable, but on the other hand, the problem of pesticides applied to these golf courses has also been improved. In other words, pesticides for controlling harmful insects attached to the lawn of golf courses may flow into nearby rivers or pollute groundwater, which may adversely affect humans and the natural environment near golf courses. That is why. In particular, the putting green, which is an important facility of the golf course, is a variety of pesticides that are sprayed many times a year in order to keep the green that is vegetated on it, that is, the lawn, in the best condition at all times. The adverse effects of this pesticide can certainly not be ignored.

In particular, for pesticides that infiltrate into the ground, it is almost purified or decomposed during the medicinal period due to the natural purifying action of microorganisms, etc., but there is no problem so much, the surface of the golf course, For example, there is a problem with pesticides attached to lawns. That is, when it rains after spraying pesticides, the pesticides existing on the surface layer of the golf course are washed away by the rain and flow out along with the rainwater on the surface layer of the golf course. And if this pesticide flows into the river as it is through the drainage channel, it will have an adverse effect on humans and the natural environment as described above.

Therefore, conventionally, for example, a water retention layer using river sand or the like is provided below the vegetation layer of the lawn, and a water passage layer to which a drain port is connected is provided below the water retention layer. The pesticide that has flowed in with rain or the like is led from a drain port to a purification treatment facility, and the purification treatment work of the pesticide is performed in this purification treatment facility.

However, since the purification treatment facility is expensive and takes up space, it is very expensive to install it so that all the wastewater from the golf course is treated, and the wastewater from each putting green etc. It is very difficult to collect them in one purification treatment facility, because the golf course itself is generally widely installed in the mountains and fields of a plurality of terrains. Moreover, conventional purification facilities
It was almost impossible to use anything on it, and the part where it was installed could not be used for anything else, so the land could not be used effectively.

Therefore, the present inventors have conducted various studies on how to construct a golf course having a simple structure and sufficient pesticide treatment function, and as a result, so-called charcoal such as charcoal or bark charcoal has been found. The inventors have found that charcoal or bark charcoal is effective in adsorbing pesticides and forming colonies of microorganisms that decompose the pesticides, and completed the present invention.

(Problems to be Solved by the Invention) The present invention has been made based on the above-described background, and the problem to be solved is purification of agricultural chemicals on a golf course.

Then, the object of the present invention is to provide a pesticide purification structure that can sufficiently and reliably purify the sprayed pesticide, and can be easily provided at a low cost. To provide a golf course.

(Means for Solving the Problems) In order to solve the above problems, the means adopted by the present invention are:
The explanation will be given with reference numerals used in the examples. "A drainage channel (11) for collecting and discharging drainage from components of a golf course (10) such as fairways and putting greens.
And the water retention layer (21) made of sand or the like, which is arranged in the middle or at the end of the drainage channel (11) and has an average particle size of 0.5 mm to 6
At least made of charcoal or bark charcoal granulated to about mm
A golf course (10) with a pesticide purification structure (20) that has a coal bed (22) with a thickness of 15 cm or more and a water passage layer (23) that is separated from this coal bed (22) and is composed of gravel, etc. is there.

Here, the drainage channel (11) is not limited to what is called a U-shaped groove made of concrete as illustrated in the drawings showing the embodiment, but may have any structure as long as it collects drainage. Alternatively, it may be configured such that the lowered passage is simply covered with gravel.

(Operation of the Invention) The operation of the golf course (10) according to the present invention configured as described above will be described in detail below in order.

First, a part of the pesticide sprayed on the golf course (10) for controlling pests on the lawn adheres to the lawn, and the rest of the pesticide penetrates underground. After that, if excessive watering for the lawn is performed or if it rains, the pesticides that adhered to the lawn and were present on the surface of the golf course (10),
It flows out from the surface of the golf course (10) and into the drainage channel (11) already installed in the golf course (10). Since each drainage channel (11) is installed so as to face the pesticide purification structure (20), the water containing the pesticide is guided to the drainage channel (11) and flows into the pesticide purification structure (20). Then, in the pesticide purification structure (20), this pesticide flows from the water retention layer (21) into the coal bed (22) together with water.

In the water retention layer (21) of this pesticide purification structure (20), while partially retaining the inflowing water and pesticide,
The part that could not be retained is flowed to the lower coal seam (22). In the charcoal layer (22), porous charcoal or bark charcoal is present as a layer, so most of the pesticides are captured in the pores of the charcoal. Therefore, almost no pesticide remains in the water that has passed through the coal seam (22) and entered the water passage (23) located below the coal seam (22). Even if it is directly discharged to the outside from the drain port (24) connected to (), it will not adversely affect humans and the natural environment.

In this case, if a water-permeable sheet is interposed between the coal seam (22) and the water-permeable layer (23), the water-permeable sheet will cause the coal bed (22)
Since the charcoal or bark charcoal that composes the water does not flow out to the aquifer (23) side together with the water, even if the water flows into the aquifer (23) side, the charcoal (22) is formed. Charging charcoal or bark charcoal will not be washed away.

In this golf course (10), the water retaining layer (21) contains a certain amount of water, and the charcoal layer (22) is in direct contact with the water retaining layer (21). 2
The pores of the charcoal or bark charcoal that make up 2) are always maintained in a moist state. This and the fact that charcoal or bark charcoal itself is porous facilitates the growth of microorganisms in the pores. Therefore, in particular, a large amount of microbial colonies are formed in this coal seam (22), and the pesticides captured by each charcoal or bark charcoal are decomposed mainly by the microorganisms growing in the colonies of this coal seam (22). Is done.

Then, in order to ensure the above action sufficiently and reliably, the thickness of the water retention layer (21) is set to about
It is 10 om to 40 cm. In other words, if the water retention layer (21) is not of the thickness described above, it will not be possible to sufficiently permeate and filter water containing pesticides, and the effect of the charcoal layer (22) will not be obtained. It will not be possible to bring out.

A part of the pesticide is also captured in the water retention layer (21), and colonies of microorganisms that decompose the pesticide are also formed. The decomposition is partial, but done.

As described above, the pesticides applied to the golf course (10) are captured and decomposed in the water retaining layer (21) and the coal layer (22), particularly the coal layer (22), and the water passing layer (23). Almost no pesticide remains in the water flowing out of the drainage port (24) connected to the. Therefore, in the golf course (10) according to the present invention, the pesticide can be sufficiently and surely purified. As a result, this golf course (10) does not let pesticides flow out to the vicinity where it is installed.
It protects humans and the natural environment.

Furthermore, the pesticide purification structure (2
0) is a state in which the upper surface remains open, and is at substantially the same height as the ground located around it. Therefore, a part of the structure (30) can be projected on the pesticide purification structure (20) as shown in the figure. Regarding this pesticide purification structure (20), if necessary, the water retention layer (21) may be used as a bunker for the golf course (10), or stepping stones may be placed on the water retention layer (21) to form part of the passage. The upper part of this pesticide purification structure (20) can be fully utilized.

(Example) Next, the golf course (10) according to the present invention will be described in detail according to the example shown in the figure.
As a matter of course, it has components such as fairway, putting green, and tee ground, and is provided with a drainage channel (11) for draining rainwater flowing through the surface of these components to certain places. . The golf course (10) is arranged in the middle or at the end of the drainage channel (11), and is mainly arranged in order from the upper side in the figure. The water retention layer (21), the coal bed (22), and the water passage layer (23). It is equipped with a pesticide purification structure (20). In addition,
The drainage port (24) is connected to a part of the aeration layer (23),
Water that has been purified by the pesticide purification structure (20) is discharged from the drain port (24).

The water retention layer (2 that forms the top layer of the pesticide purification structure (20)
1) is mainly for retaining water, and in the present embodiment, so-called river sand was adopted, but if it can sufficiently retain water, for example, crushed It may be perlite or the like, or may be a mixture thereof. Also, the thickness of the water retaining layer (21) should be about 10 cm to 40 cm, because the reason is that if it is thinner than 10 cm, a sufficient water retaining effect cannot be obtained, and if it is less than 40 cm. This is because even if it is made thicker, it will cost more and the desired effect cannot be expected. Above all, the thickness of this water retaining layer (21) is optimally about 30 cm.

The coal seam (22) located below the water retaining layer (21) was constructed by laying so-called charcoal or bark charcoal with an average particle size of about 0.5 mm to 6 mm. The reason why charcoal is used is that the so-called thinned wood is used to supply it cheaply and stably, and the active use of the thinned wood is due to the recent Japanese forestry industry. Because it can contribute to the development of. Similarly,
The bark charcoal is formed by burning bark and is supplied at a low cost, so it is advantageous when producing a large area.

In this example, the thickness of the coal bed (22) was about 15 cm. The reason is that if the charcoal layer (22) is thinner than this, the pesticide can be sufficiently purified, and if it is not regulated such as cost, it may be configured as 15 cm or more. If the particle size of the charcoal or bark charcoal forming the coal bed (22) is too small, it will be washed away with water, and if it is too large, it will not be possible to secure a sufficient contact area with the pesticide. As previously mentioned,
The average particle size of 0.5 mm to 6 mm is the most effective.

Then, as the water passage layer (23) located at the bottom layer, the water flowing into the water passage layer (23) can be discharged to the outside from the drain port (24) connected to the water passage layer (23). In order to do so, so-called pebbles were laid.

Regarding the effects of the golf course (10) configured as above,
The experimental results are summarized in the following table. In this experiment, vanafine, sumithione, and orthoside were used as pesticides, and these 1000-fold solutions were continuously treated for 120 hours at a spray rate of 12 / m ² · hr. And the coal seam (2
2) The shape of charcoal or bark charcoal that composes is large,
By measuring the remaining amount of each pesticide in the water flowing out of the drainage port (24) as medium or small, the golf course (1
The pesticide removal rate (%) of 0) was measured.

Large, medium and small charcoal or bark charcoal in this case were indirectly measured by the density of the coal bed (22), but large 0.24 g /
m, medium is 0.39 g / m, small is 0.44 g / m, and when this is converted to the average particle size of charcoal or bark charcoal, it is 5 mm to 1 respectively.
It was 0 mm, about 1 mm, and 0.5 mm.

(Measurement person: General insurance center, measurement certification business office Address: 7-169 Nishimachi, Minokamo city, Gifu prefecture Measurement method of removal rate is according to GC-ECD) As can be understood from the results of this table, vanafin and orthoside Regarding, regarding the grain size of the granular charcoal or bark charcoal constituting the coal seam (22) is 97.1% or more in any case, this golf course (10) has an excellent purifying effect. I understand. Sumithion is efficiently purified when the granular coal that forms the coal seam (22) is very small (when the density is greater than 0.44 g / m), but it is highly likely that Sumithion will be used in golf courses ( For 10), it is sufficient to use such a small granular material.

(Effects of the Invention) As described in detail above, in the present invention, as illustrated in the above embodiment, "a drainage channel for collecting and discharging drainage from components of a golf course (10) such as a fairway and putting green ( 11)
And the water retention layer (21) made of sand or the like, which is arranged in the middle or at the end of the drainage channel (11) and has an average particle size of 0.5 mm to 6
At least made of charcoal or bark charcoal granulated to about mm
It was equipped with a pesticide purification structure (20) that had a coal bed (22) with a thickness of 15 cm or more and a water passage layer (23) that was partitioned from this coal bed (22) and was composed of gravel, etc. ” A golf course equipped with a pesticide purification structure that is unique in that it allows the sprayed pesticide to be purified sufficiently and reliably, can be easily constructed, and can be provided at low cost. Can be provided.

In particular, in the golf course (10) according to the present invention, the pesticide purifying structure (20) is sufficiently effective even if the upper part of the pesticide purifying structure (20) is left open. The water retaining layer (21) on the surface of 20) can be used as something else such as a passage, and a part of the structure (30) can be projected on the pesticide purification structure (20). The pesticide purification structure (20) itself can be effectively used as a golf course (10) facility.

[Brief description of drawings]

The figure is a partial cross-sectional view of a golf course according to the present invention. Explanation of code 10 …… Golf course, 11 …… Discharge path, 20 …… Pesticide purification structure,
21 …… Water retention layer, 22 …… Coal layer, 23 …… Water passage layer, 30 …… Structure.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display area E03F 1/00 A 7265-2D

Claims (1)

[Claims] 1. A drainage channel that collects and drains drainage from components of a golf course, such as a fairway and a putting green, and a drainage channel that is arranged in the middle or at the end of the drainage channel.
A water retaining layer made of sand, a charcoal layer of at least 15 cm or more made of charcoal or bark charcoal granulated to an average particle size of 0.5 mm to 6 mm, and a water layer formed by gravel and the like separated from this coal layer. A golf course equipped with its own pesticide purification structure.