Title:
HYDRODYNAMIC STABILISATION SYSTEM AGAINST COASTAL EROSION
Document Type and Number:
WIPO Patent Application WO/2004/076748
Kind Code:
A1
Abstract:
The invented Hydrodynamic Stabilisation System (HDS) is applied to promote the infiltration rate in the swash zone to compensate for the minor conductivity in beach profiles composed of fine sand particles, by reducing the capillary effect (negative pore pressure governed by Darcy's law) within the beachface to improve the horizontal and vertical flow through the beachface to promote uprush sediment transport and entrapment. The system comprises a vertically mounted aeration pipe (1) partially buried into the subsoil of the upper beach bed. This pipe (1) is open to atmospheric air. The aeration pipe (1) is mounted onto a hub (2), which is buried in the subsoil of the upper beach immediately under the aeration pipe (1). The hub (2) is further connected to a series of filter membrane vertical tubes or pipes (4) vis tubes or pipes (3).
Inventors:
AZEEM SYED ABDUL (GB)
BIRKEDAL KURT (DK)
BIRKEDAL KURT (DK)
Application Number:
PCT/GB2004/000675
Publication Date:
September 10, 2004
Filing Date:
February 19, 2004
Export Citation:
Assignee:
AZEEM SYED ABDUL (GB)
BIRKEDAL KURT (DK)
BIRKEDAL KURT (DK)
International Classes:
E02B3/04; (IPC1-7): E02B3/04
Domestic Patent References:
| WO1999028559A1 | 1999-06-10 |
Foreign References:
| US4898495A | 1990-02-06 | |||
| US5022784A | 1991-06-11 | |||
| US5294213A | 1994-03-15 |
Attorney, Agent or Firm:
Birkedal, Kurt (Ebeltoft, DK)
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Claims:
CLAIMS
| 1. | Claim 1. A method for combating coastal erosion and an aeration system for use in this connection where the geological features of the shore bed are dominated by particles with an average size that changes the capillary regime, CHARACTERISED by installing series of membrane filter systems that compensate for low sediment porosity to stabilise the beach in the swash zone by using the tidal dynamics and waves as the hydraulic mechanics. |
| 2. | Claim. |
| 3. | A method according to claim 1, CHARACTERISED by installing a series of underground and aboveground pipes and tubes in a matrix in the swash zone and up to a distance of 30 metres landward of the swash zone, to reduce the backwash flow in the swash zone by aerating the strata in this zone to increase the vertical infiltration. Claim 3. A method according to claim 1 and 2 CHARACTERISED by a single rigid or flexible pipe or tube of varying length or diameter that stand alone or a series of rigid or flexible pipes or tubes connected in a pattern for use in performance of the method according to claim one. Claim 4. A method according to claim 1 CHARACTER) SED by singte rigid ! pipe or tube or a flexible pipe or tube for use in the performance of the method in that they are wholly or partly covered by a filter membrane. Claim 5. A method according to claim 1, 2 and 3 CHARACTERISED by a series of rigid or flexible pipes or tubes that are connected in a subsoil manifold pattern connected to a hub for use in performance of the method according to claim one. Claim 6. |
| 4. | A method according to claim 1,2, 3,. |
| 5. | and 5, CHARACTERISED by the vertical subsoil filter membranes that penetrate the layers of different strata in the coastal profile to change the capillary regime. Claim 7. A method according to claim 1,2, 3,4, 5, and 6, CHARACTERISED by the vertical subsoil filter membranes that penetrate the layers of different strata in the coastal profile and act as a flow finger for the vertical infiltration into the coarse grained strata within the bed in the beach face of the swash zone. |
Description:
HYDRODYNAMIC STABILISATION SYSTEM AGAINST COASTAL EROSION The system comprises a vertically mounted aeration pipe 1 partially buried into the subsoil of the upper beach bed. This pipe 1 is open to atmospheric air. The aeration pipe 1 is mounted onto a hub 2, which is buried in the subsoil of the upper beach immediately under the aeration pipe 1.
The hub 2 is further connected to a series of filter membrane vertical tubes or pipes 4 via tubes or pipes 3 as shown in figure 2.
The position, depth and inclination of the components shown in figure 1 are variable in each specific case, and determined by measurements and site geological properties at each site where the system is to be applied.