DE202008017535U1 - Arrangement for catching percolating water - Google Patents

Abstract

Arrangement for catching the water percolating in the ground,
characterized in that a sheet-like drainage element (7) is arranged with a gradient in the ground, the drainage element (7) on the underside a water-impermeable surface element (9), in particular a film or plate, and at the top a water-permeable surface element (11) in Distance from the water-impermeable surface element (9), and
a water collecting system (8) is arranged in the lower region, in particular at the lowest point of the drainage element (7).

Description

The The invention relates to an arrangement for catching the seepage in the soil Water.

The Arrangement is particularly intended for arid, so hot and dry Areas where irrigated crops need to be irrigated. The needed for this Water is scarce and expensive and should therefore be economical and preferably be used effectively.

If such areas can be located near the coast an extensive irrigation lead to salinisation. The water trickles down from the top to the bottom the capillary action, the rising of salty, sea-derived Groundwater. Due to the rising salt water the fertility decreases of the soil.

Of the The invention is therefore based on the object, especially for aride Areas an arrangement for the irrigation to create plants, which on the one hand allows a significant water savings and on the other hand, the salting of the soil by irrigation prevented. The water seeping into the ground, not used by the plant should be as possible huge Share recovered be there for it again the irrigation to use.

These Task is in the above-mentioned arrangement for collecting the infiltrating water in the soil solved according to the invention, that a sheet-shaped drainage element with gradient is arranged in the ground, wherein the drainage element at the bottom a watertight Surface element, in particular a film or plate, and ment at the top of a water-permeable Flächenele in the distance to the impermeable surface element and that a water collection system in the lower area, in particular is arranged at the lowest point of the drainage element.

The waterproof Surface element the bottom prevents the water from seeping into deeper ones Lay the soil and direct the water through the cavity of the impermeable and water-permeable surface element is limited to the lowest point of the drainage element, where the Water is collected by the water collection system to it again, in particular for irrigation, to use.

One Salting of the soil is inventively by the complete seal the soil against saline groundwater by means of the water-impermeable surface element reached.

Of the for the Drainage required cavity can basically on be formed in different ways. According to the invention, it is proposed that the impermeable surface element upwardly directed projections, in particular nubs, and having the water-permeable surface element rests on the top of the knobs. If the bottom of a Plastic film is formed, can the knobs are formed by deep drawing directly into the film.

Preferably is the water-permeable surface element attached to the top of the knobs and in particular glued. This water permeable surface element is in an advantageous embodiment, a textile, in particular a so-called geotextile.

Farther It is proposed that the water collection system on the one hand a pipe with openings, in particular slits, and on the other hand comprises a collection tank.

Further Advantages and preferred embodiments of the invention will be apparent the embodiment described below, which reference from drawings closer is described. Show it

1 a schematic representation in section through the bottom with the inventive arrangement,

2 a perspective view of a portion of the drainage element used in the inventive arrangement,

3 a perspective schematic representation of the arrangement with the water collection system and

4 a detail from 1 ,

In All drawings have the same reference numerals and therefore may only be explained once.

The schematic sectional view in 1 through the ground together with the arrangement according to the invention shows a topsoil 1 with plant growth 2 , which is irrigated from above. Part of the irrigation water evaporates, as indicated by the arrows 3 is hinted at. The sandy soil 4 below the topsoil 1 contains saline aquatic veins 5 , From the groundwater veins 5 can saline water through the capillary effect, indicated by arrows 6 , rising up.

According to the invention lie between the courage terboden 1 and the sandy bottom 4 planar flat drainage elements 7 , each with a gradient. At the deepest points of the drainage elements 7 each is a pipe 8th provided with slotted openings for catching the water.

The structure of the drainage element 7 is in 2 shown in perspective. The underside consists of a water-impermeable surface element 9 formed in the embodiment as a closed and pressure-resistant HDPE film. Deep-drawn, up-facing, frusto-conical nubs 10 of the water-impermeable surface element 9 ensure a defined distance of a geotextile applied and glued to the top of the knobs 11 , which represents the water-permeable surface element. For better visibility of the nubs is in 2 the geotextile 11 partially folded backwards and backwards. The geotextile consists in a preferred embodiment of thermally interconnected PP fibers. The entire drainage element is resistant to chemicals and microorganisms and offers a high resistance to the penetration of plant roots. The strength of the water-impermeable surface element 9 is chosen large accordingly.

That from the pipes 8th Trapped water is passed through a longitudinal tube 12 in a waterproof underground storage tank 13 directed ( 3 ).

The pipes 8th are slotted to allow water access. The longitudinal slots are only in the upper part of the pipes, distributed over a 2/3 portion of the pipe circumference. The lower part of the pipe (1/3 part of pipe circumference) has no slots to prevent water loss. The longitudinal tube 12 on the other hand is closed and has no openings in the pipe wall. A cross section through the arrangement with the water collecting pipe is in 4 shown. The drainage elements 7 end at their lowest point on the manifold 8th , which has the already mentioned longitudinal slots in the pipe wall.

Above the manifold 8th is to protect its longitudinal path 14 made of water-permeable geotextile. Downwards is the manifold 8th with a second longitudinal track 15 from a water-impermeable plastic film, preferably made of PE against the sandy soil 4 sealed.

The gradient of the drainage elements 7 should be at least 0.5.

The Hollow knob drainage elements are drainage composites and exist made of deep-drawn, downwardly closed, pressure-stable knobbed bodies HDPE with top-fixed, filter-stable PP geotextile of pre-stretched, endless and thermally bonded staple fibers with high energy absorption (> GRK 3 standard fleece).

The Thickness of the studded plate is, dependent from the pressure stability (250 or 400 kPa), at least 0.45 mm. The underside of the studded plate is Depending on the requirements of the substrate differently equipped for Achieving high friction angles.

1

topsoil

2

vegetation

3

arrow

4

sandy soil

5

Groundwater vein, salty

6

arrow

7

drainage

8th

Pipe, manifold

9

water-impermeable surface element

10

burl

11

geotextile, water-permeable surface element

12

longitudinal tube

13

collection tank for water

14

longitudinal track

15

Second longitudinal track

16

slot

Claims (6)

Arrangement for collecting the water percolating in the ground, characterized in that a sheet-like drainage element ( 7 ) is arranged with a gradient in the ground, wherein the drainage element ( 7 ) at the bottom a water-impermeable surface element ( 9 ), in particular a film or plate, and at the top a water-permeable surface element ( 11 ) at a distance to the water-impermeable surface element ( 9 ) and that a water collection system ( 8th ) in the lower region, in particular at the lowest point of the drainage element ( 7 ) is arranged. Arrangement according to claim 1, characterized in that the water-impermeable surface element ( 9 ) upwardly directed projections, in particular knobs ( 10 ), and the water-permeable surface element ( 11 ) at the top of the pimples ( 10 ) rests. Arrangement according to claim 1 or 2, characterized in that the water-permeable surface element ( 11 ) at the top of the pimples ( 10 ), in particular glued. Arrangement according to one of the preceding claims, characterized in that the water-permeable surface element ( 11 ) is a textile. Arrangement according to one of the preceding claims, characterized in that the water collection system is a pipe ( 8th ) with openings, in particular slots ( 16 ). Arrangement according to one of the preceding claims, characterized in that the water collection system comprises a collection tank ( 13 ).