KR20130122422A

KR20130122422A - Device for increasing base flow using rain storage tank

Info

Publication number: KR20130122422A
Application number: KR1020120045730A
Authority: KR
Inventors: 박재현
Original assignee: 인제대학교 산학협력단
Priority date: 2012-04-30
Filing date: 2012-04-30
Publication date: 2013-11-07

Abstract

The present invention relates to a base outflow increasing facility using rainwater storage tanks. More specifically, the rainwater stored in rainwater storage tanks after rainfall is discharged to the groundwater level between the upstream and downstream sides through a horizontal discharge trench, and has a higher water level. Regarding the base runoff increase facility using rainwater storage tanks, which can increase the upstream storage function by increasing the upstream groundwater level by forming a water mount for a long time, thereby reducing direct runoff and increasing base runoff. will be.
This invention includes one or more storm storage tanks buried in the ground to store rainwater; A plurality of horizontal discharge trenches connected to the storm storage tank and buried in the upper and lower stages in the ground between the upstream side and the downstream side of the subwatershed to discharge rainwater from the storm reservoir after the rainfall to the groundwater level to form a water mount higher than the groundwater level; Base discharge increase facility using storm water storage tank, characterized in that it is configured to include a technical gist.

Description

Device for increasing base flow using rain storage tank

The present invention relates to a base outflow increasing facility using rainwater storage tank. More specifically, the rainwater stored in the rainwater storage tank after rainfall has been discharged to the groundwater level between the upstream side and the downstream side through a horizontal discharge trench. Regarding the base runoff increase facility using rainwater storage tanks, which can increase the upstream storage function by increasing the upstream groundwater level by forming a water mount for a long time, thereby reducing direct runoff and increasing base runoff. will be.

Rainfall generally flows into rivers or streams. These runoffs are roughly classified as direct and indirect runoff. Direct outflow is a runoff that flows into a river or river without going through groundwater. Indirect or base runoff is a runoff that flows through a groundwater into a stream or river.

Direct runoff is classified into surface runoff and intermediate runoff. Surface runoff flows directly into rivers or rivers as rainfall moves along the waterway from the surface, which occurs when rainfall intensity exceeds the penetration of the surface. Intermediate runoff is runoff in the vicinity of a channel as rainfall penetrates into the soil of the permeable surface and moves inward into an unsaturated or mass flow stream.

Indirect outflow is the outflow of rivers to rivers or rivers through underground groundwater, which is commonly referred to as basal outflow or groundwater outflow. In this case, the base outflow increases as the groundwater level rises due to the increase of infiltration after rainfall, and in detail, the base outflow increases as the groundwater level increases due to the infiltrated rainfall. As the price falls, the base spill also decreases.

For the continuous supply of river maintenance flow, it is very important to manage the groundwater resources so that a certain level of base runoff can occur continuously for a certain time after the rainfall stops. In order to solve this problem, researches are being actively conducted on techniques for increasing the base outflow.

Most of these conventional techniques are intended to increase the permeability of the strata to induce rainfall to quickly penetrate into the base to reduce surface and intermediate spills and to increase the base outflow.

However, the conventional techniques are effective only when the groundwater level is high after rainfall, and when the groundwater level is lowered due to the discharge of the base flow rate over time, there is a limit that is difficult to expect the same effect.

In addition, the conventional techniques are not only expensive, but also cause a landslide or damage to the ecosystem due to the artificially changing permeable structure to increase the permeability of the strata. do.

The present invention has been invented to solve the above problems, it is costly and storm water storage tank to maintain and increase the base outflow for a certain time without the change of the stratum structure causing a landslide or destruction of the ecosystem The purpose is to provide a baseline runoff increase facility.

In order to achieve the above object, the base outflow increasing facility using the storm water storage tank of the present invention is buried in the ground one or more storm water storage tank to store rainwater; A plurality of horizontal discharge trenches connected to the storm storage tank and buried in the upper and lower stages in the ground between the upstream side and the downstream side of the subwatershed to discharge rainwater from the storm reservoir after the rainfall to the groundwater level to form a water mount higher than the groundwater level; Characterized in that configured to include.

The rainwater storage tank is characterized in that it is composed of a structure that is forcibly supplied through a pump installed between the rainwater storage tank and the horizontal discharge trench, or naturally supplied by the height difference of the rainwater storage tank and the horizontal discharge trench.

The horizontal discharge trench is characterized in that it consists of a cylindrical body having a plurality of discharge holes are drilled on the outer circumferential surface and a supply pipe connected to the rainwater storage tank on one side.

The present invention by the means for solving the above-described problem, the present invention by the means for solving the above-described problem, by using the rainwater stored in the storm storage tank without changing the strata structure to maintain the upstream ground water level elevated after the rainfall for a long time Increasing runoff has the effect of lessening costs by increasing stream maintenance without any cost and other side effects.

1 is an exemplary view showing an installation state according to a preferred embodiment of the present invention.
2 is a cross-sectional view taken along the line AA ′ of FIG. 1.
Figure 3 is a connection state of the horizontal discharge trench and rainwater storage tank according to a preferred embodiment of the present invention.
4 is a sulfur curve according to a preferred embodiment of the present invention.

The base runoff increasing facility using the storm water storage tank according to the present invention is constructed in the ground between the upstream side and the downstream side of the subwatershed in the coastal area to maintain the elevated upstream groundwater level after the rainfall for a long time to increase the base runoff through the increase of the storage amount. One facility.

This is made possible by supplying the rainwater storage tank which stores rainwater in case of rainfall to the horizontal discharge trench installed in the upper and lower multiple stages under the groundwater level in the corresponding terrain to form a water mount having a water level higher than the groundwater level for a long time.

Therefore, the upstream storage amount can be increased while maintaining the upstream groundwater level which is increased by prolonged flow of the infiltration water flowing from the upstream side to the downstream side for a long time.

Accordingly, it is possible to reduce the direct outflow of the infiltration water directly into the river or river through the groundwater level, and to increase the base outflow through the increase of the outflow.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary view showing an installation state according to a preferred embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line A-A 'of Figure 1, Figure 3 is a connection of the horizontal discharge trench and rainwater storage tank according to a preferred embodiment of the present invention 4 is a sulfur diagram according to a preferred embodiment of the present invention.

The base outflow increasing facility using the storm storage tank according to the present invention is largely composed of the storm storage tank (1) and the horizontal discharge trench (2) as shown in FIG.

First, the storm reservoir 1 is a place where rainwater that is buried in the ground and landed on the ground naturally flows into the reservoir as shown in FIG. 1.

The rainwater storage tank (1) serves to provide rainwater that is supplied to the horizontal discharge trench (2). Therefore, the capacity of the storm storage tank (1) is sufficient to be appropriately selected according to the retention time and the size of the water mount formed by the horizontal discharge trench (2) to achieve the object of the present invention.

That is, it may be composed of one rainwater storage tank (1) having a sufficient capacity, or may be composed of a plurality of rainwater storage tank (1) so as to secure a sufficient capacity by configuring a plurality of small capacity.

Here, the rainwater storage tank 1 is provided with a plurality of horizontal discharge trenches 2 through the distribution pipe 5 and the supply pipe 4 as shown in FIG.

In this case, when the rainwater storage tank 1 is configured as one, it is connected to the horizontal discharge trench 2 through the distribution pipe 5 and the supply pipe 4. And when the rainwater storage tank (1) is composed of a plurality may be directly connected to the horizontal discharge trench (2) in one-to-one through the supply pipe (4), or horizontal discharge trench (2) in one-to-many through the distribution pipe (5) and supply pipe (4) ) May be connected.

And the rainwater of the rainwater storage tank (1) is forcibly supplied through the pump (7) provided between the rainwater storage tank (1) and the horizontal discharge trench (2), or the rainwater storage tank (1) and the horizontal discharge trench (2) Supplied naturally by elevation.

In this case, in order for the rainwater storage tank 1 to be naturally supplied by the height difference, the rainwater storage tank 1 should be installed at a position higher than the horizontal discharge trench 2. Therefore, the rainwater of the rainwater storage tank 1 can be supplied to each horizontal discharge trench 2 by force or naturally.

Next, the horizontal discharge trench (2) is composed of a plurality as shown in Figure 1 is embedded in the upper and lower stages in the middle between the upstream and downstream of the subwatershed. This discharges the rainwater supplied from the rainwater storage tank (1) between the upstream groundwater level (L) and the downstream groundwater level (L) through the discharge hole (3) to generate a water mount (W) higher than the groundwater level (L). The role of forming for a long time.

To this end, the horizontal discharge trench (2) is provided with a supply pipe (4) connected to the rainwater storage tank (1) on one side with a cylindrical body as shown in Figure 3 and the rainwater supplied from the rainwater storage tank (1) on the outer circumferential surface It is preferable that it is comprised by the structure which the some discharge hole 3 discharged | emitted by (L) is perforated.

In this case, the horizontal discharge trench (2) is preferably installed where the desaturation of the upstream region does not affect the vegetation when forming the water mount (W). And the horizontal discharge trench (2) is preferably installed to a depth that does not weaken the amount of penetration during rainfall. In addition, it is preferable to be filled with the filter layer 6 in the vicinity where the horizontal discharge trench 2 is installed, for adjusting the water permeability in the downstream direction.

Therefore, the flow of infiltration water flowing from the upstream side to the downstream side is delayed by the water mount W by the water mount W formed by the rainwater discharged from the horizontal discharge trench 2.

In addition, since the upstream ground water level (L) is maintained for a long time, the inflow water can reduce the direct outflow to the river or river through the ground water level. Then, when the water level of the storm water reservoir (1) is lowered, the upstream groundwater level is also lowered, which leads to a natural outflow, thereby increasing the base outflow.

As described above, the base outflow increasing facility using the storm water storage tank according to the present invention maintains the upstream groundwater level (L) elevated through the water mount (W) formed by using the rainwater without changing the strata structure for a long time Increasingly eliminates conventional problems that are costly and may cause landslides and ecosystem destruction.

4 shows a sulfur curve changed after applying the base outflow increasing facility using the storm water storage tank according to the present invention. By comparing the sulfur curve (C) after applying the present invention and the sulfur curve (B) before the application, it can be seen that the number of days in which the sulfur curve (C) after the application is close to the target stream maintenance amount (E) is increased. Therefore, it can be confirmed that the present invention has an effect of reducing the flow of water by increasing the stream maintenance.

The above embodiments are merely exemplary, and those having ordinary skill in the art may have other embodiments modified in various ways.

Therefore, the true technical protection scope of the present invention should include not only the above embodiment but also various other embodiments modified by the technical spirit of the invention described in the claims below.

1: storm reservoir 2: horizontal discharge trench
3: outflow hole 4: supply pipe
5: distribution pipe 6: filter layer
7: pump L: groundwater level
W: Water Mount

Claims

At least one storm storage tank (1) buried in the ground to store storm water;
Connected with the rainwater storage tank (1) and buried in the upper and lower stages in the ground between the upstream and downstream side of the subwatershed to discharge the rainwater supplied from the rainwater storage tank (1) after the rainfall to the groundwater level (L) to the groundwater level (L) And a plurality of horizontal discharge trenches (2) forming a higher water mount (W).

The method of claim 1,
The superiority of the said excellent storage tank 1,
It is composed of a structure that is forcibly supplied through a pump installed between the storm storage tank (1) and the horizontal discharge trench (2), or naturally supplied by the elevation difference between the storm reservoir (1) and the horizontal discharge trench (2). Base runoff increase facility using storm water storage tank.

The method of claim 1,
The horizontal discharge trench 2 is,
A base discharge increase facility using rainwater storage tanks, characterized in that a plurality of discharge holes (3) are drilled on the outer circumferential surface and composed of a cylindrical body having a supply pipe (4) connected to the rainwater storage tank (1) on one side.