JPH03224583A - Green structure for golf having underground reservoir - Google Patents

Abstract

PURPOSE:To maintain the peripheral environment and to effectively utilize water by forming many hole gaps in the lower part of floor soil of a green, forming a non-permeable layer on the bottom face, and storing precipitation and irrigation water so that water can be collected and utilized when necessary. CONSTITUTION:Floor soil 1 is shallowed, a base material such as sand used as a floor soil material is formed to coarse grains, and also, in order to raise the water-holding and water-storage capacity, underground structures 2, 4 of the lower part than the floor soil 1 are deepened and the underground structure parts 2, 4 are constituted by using a material having many coarse grain hole gaps. Also, on the bottom face of the underground parts 2, 4, a non-permeable layer is formed by laying a waterproof sheet 5, etc., in order to prevent infiltra tion to under the ground 6, and the underground structure part is allowed to have water storage capacity. Water stored in the underground water storage layer 4 is collected to a pumping tank 8, etc., and thereafter, fed to a sprinkler and an in-course irrigation system and used for the respective purposes. In such a way, it is quickened to cultivate control of a mountain and control of water, and water can be reutilized.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention effectively and safely utilizes rainwater and irrigation water that falls on the greens of golf courses scattered over a wide area of 60 to 100 hectares. This invention relates to a golf course green structure that can contribute to the cultivation of wood.

(Prior Art) Golf course greens are made sandy and drained through culverts in order to prevent tread pressure compaction and to improve the water permeability of the turfgrass cultivation base. Rainwater or sprayed water that falls on the green permeates into the turfgrass cultivation base, and the permeated water is collected above the impermeable layer such as the bedrock layer below the base and is discharged downstream, or is further naturally percolated underground. There is.

(Problems to be Solved by the Invention) As mentioned above, if the turfgrass cultivation base is made sandy in order to prevent treading and compaction of the green, the water permeability of the base will improve, but
Because seepage water flows down faster than other natural soil layers, care must be taken to ensure that the release of seepage water does not harm the natural environment.

For this reason, only the surface layer (soil) of the green is sometimes made sandy, but this results in poor drainage and causes problems with water running off the surface of the green. In addition, by increasing the flow rate of seepage water and running water on the green surface, the public is under the misconception that fertilizers and pesticides applied to the greenery will not be fully absorbed by the turfgrass, and will flow into groundwater and rivers along with the seepage water. giving. Furthermore, there is an urgent need to prevent such seepage water from flowing into groundwater, and to carry out mountain conservation and flood control.

The present invention is intended to solve the various problems mentioned above.
The purpose of this project is to further improve the water permeability of the turfgrass cultivation base, eliminate running water on the green surface, and collect water underground, thereby reusing the water.
Rather than releasing it, the underground structure was made more porous and porous, increasing its water storage capacity and paving the way for the reuse of natural ice.

(Means for Solving the Problem) In the golf course green structure of the present invention, the conventional bed soil is made shallower and used as a bed soil material in order to further increase the underground permeation of rainwater and to improve the growth of surface grass. In order to make the base material such as sand coarser, and to increase the underground water retention and storage capacity, the underground structure below the bed soil is deepened, and the underground structure is made of materials with coarser particles and more pores. The underground structure is characterized in that a waterproof sheet or the like is laid on the bottom surface of the underground structure to prevent seepage into the ground to form an impermeable layer, and the underground structure has a water storage capacity.

In the present invention, the underground structure (water reservoir) for providing water storage capacity is preferably made of a porous inorganic material such as pumice, lava, or coke, and has a particle size of 20 mm in order to have multiple pores and pores. It is recommended that the structure be constructed using the above-mentioned cobblestones. The thickness of this underground structure varies depending on the topography of the golf course, the soil quality around the green, etc., but it is preferable to have a layer thickness of 50 cm or more.

The impermeable layer constituting the bottom surface of the underground structure may be a waterproof sheet made of fabric subjected to waterproof treatment, or may be a plastic sheet. Furthermore, it may be a clay layer or the like.

The water stored in the underground reservoir is collected in a pumping tank, and then pumped to the sprinklers and on-site irrigation system for use. Note that the stored water does not necessarily need to be collected in a pumping tank, and may be pumped directly from the water reservoir.

(Example) The present invention will be described below based on Examples, but the present invention is not limited thereto.

The floor ±1 for planting and growing green grass is 3
A good patching surface could be provided with a thickness of ~7 cm. In this case, by using well-aligned sand with a diameter of 1.0 mm or more as the bed soil base material, water permeation is fast, and no surface runoff was observed even with a considerable amount of rainfall.

20 to 40 cm below the floor ±1 is the rhizosphere layer 2, using porous gravel-like materials such as pumice, baked clay, and ceramics.
Their surfaces and pores have water and fertilizer retention capabilities.

The particle size composition of the material used is gravel of 2.0 mm or more, and the intergranular gaps are non-capillary pores, so that all gravity water permeates downward. The roots of the turf grass 11 are entangled with the surface of the material such as pumice stone, and are supplied with the nutrient water held by the material, and because of the porous pores, the roots of the turf grass breathe vigorously, allowing the turf grass to grow normally and robustly.

A net or nonwoven fabric is laid under the rhizosphere layer 2 to form a barrier 3 that prevents the materials of the rhizosphere layer 2 from being mixed into the water storage layer 4.

A water storage layer 4 is located below the barrier 3. The water reservoir 4 has a depth of 50 cm or more, although it varies depending on the topography of the golf course.
It is used to store seepage water. It is preferable to use a porous material that is almost the same as the material of the rhizosphere layer 2 for this water storage layer 4. However, in the case of the water storage layer 4, ordinary crushed stone may be used. In this case, use a material with a larger particle size than the material for the rhizosphere layer 2. For pumice, etc., use cobblestones with a particle size of 20 mm or more. For example, 20 to 40 o+m.
When using pumice stone, the intergranular pore space was 49.4%, and when the depth was 50 cm, water at a depth of 250 mm could be retained.

The table below shows the measurement results of porosity when water reservoirs are formed using several types of materials. In the table below, intergranular pores indicate the gaps between particles, and V/V% is volume (%).

Table pumice〃〃〃 No.5 Crushed stone〃 No.4〃 No.3.4〃 No.3〃〃 No.2〃 Gravel〃 5～10 43.3 49.81
O~40 48.9 43.42
0~40 49.4 38.71
3-20 46.3 1.32
0~30 51.3 020~
40 51.4 2.230～
40 53.7 3.440
~60 60.0 2.02~
16 30.9 6.74~1
6 34.9 11.0 Reservoir 4
At the bottom of the water storage layer 4 at a depth of 50 cm or more, a foundation ±6 with a water gradient of 1 to 2% is excavated and shaped, and an impermeable sheet 5 is tightly attached to the bottom and side surfaces of the water reservoir 4. Lay it to prevent water leakage and form the bottom of the water reservoir. A water pipe lO is connected from the wood ash on the bottom of the water storage layer 4 to lead water to the pumping tank 8. The size of the pumping tank 8 is not particularly limited, but may be between 5 and 1
It is preferable to have a capacity of about 0 tons. A valve 7 is installed between the water storage layer 4 and the pumping tank 8, and the water storage layer 4 and the pumping tank 8
Adjust the amount of water stored. The stored water is pumped up from a pumping tank 8 by a pump 9, and is sent to a sprinkler via a water supply pipe 12.
The water is sent to the on-site irrigation water system and used for lawn irrigation, etc.

(Effects of the Invention) According to the green structure of the present invention, infiltration water is reused in the green with the highest management density among the lawn areas of the golf course, thereby preserving the surrounding environment and making efficient use of water. I can figure it out. In the present invention, when the rhizosphere layer 2 having coarse pores that cannot hold gravity water is set to a depth of 30 cm and the water storage layer 4 below it is created to a depth of 50 cm, the porosity of the rhizosphere layer 2 is lO ~20% and the porosity of the water storage layer 4 is 45-50%, the water storage capacity is 255-310mm, and unless there is an extremely heavy rain, there is no need to unnecessarily discharge seepage water outside the site. In the case of the present invention, which has made the treatment possible, almost 100% of the permeated water can be reused, so it is fully useful in clearing up misunderstandings about environmental pollution caused by spraying pesticides on golf courses.

[Brief explanation of drawings] The figure is a schematic cross-sectional view showing one embodiment of the present invention. In the figure,

Claims (1)

[Claims] (1) The underground structure below the green bed soil is deepened to have many pore spaces, and a sheet or the like is laid on the bottom of the area to form a non-permeable layer, so that precipitation does not occur in the underground structure. A golf green structure having an underground water storage layer, which stores irrigation water and makes it possible to collect and use water when necessary.