Passive infiltration drainage system

1 . A passive infiltration drainage system comprising:

a. a plurality of conveyance channels excavated in a landscape parallel to the surface of said landscape, wherein said plurality of conveyance channels are distinct and separated by a different material;

b. a plurality of infiltration tunnels excavated down vertically from said plurality of conveyance channels;

c. an optional water discharge outlet point for collecting water from said plurality of conveyance channels; and

d. bedrock or saprolite connected directly to said plurality of infiltration tunnels, wherein:

i. said plurality of conveyance channels are arranged in a network configuration and configured for receiving and routing water flow;

ii. said conveyance channels comprise a top layer and a water-impermeable bottom layer; and

iii. said passive infiltration drainage system is configured for transporting excess water from grassy areas in urban and suburban settings to desired storage areas.

2 . The passive infiltration drainage system of claim 1 , wherein said top layer of said plurality of conveyance channels comprises sand.

3 . The passive infiltration drainage system of claim 1 , wherein said plurality of conveyance channels are spaced about three to five feet apart.

4 . The passive infiltration drainage system of claim 1 , wherein said plurality of conveyance channels are dug to a depth of about one to two feet.

5 . The passive infiltration drainage system of claim 1 , wherein said plurality of conveyance channels are dug to a width of about one foot.

6 . The passive infiltration drainage system of claim 1 , wherein said plurality of infiltration tunnels are drilled gradually upslope when adjacent to one or more structures that are capable of being negatively impacted by excess water.

7 . The passive infiltration drainage system of claim 1 , wherein said plurality of infiltration tunnels are drilled to a radius of 3 inches, and to a depth of 6 feet.

8 . The passive infiltration drainage system of claim 1 , wherein said plurality of infiltration tunnels are drilled directly under impervious surfaces.

9 . The passive infiltration drainage system of claim 1 , wherein said top layer comprises coarse and rounded sand with a sediment size of about 0.5 mm to 2 mm.

10 . The passive infiltration drainage system of claim 1 , wherein said water-impermeable bottom layer comprises bentonite clay with a sediment size of about 0.8 μm to 2000 μm.

11 . The passive infiltration drainage system of claim 1 , where said water-impermeable bottom layer is compacted to a thickness of 1 inch.

12 . The passive infiltration drainage system of claim 1 , wherein said optional water discharge outlet point is a body of water adjacent to said drainage system.

13 . The passive infiltration drainage system of claim 1 ,

wherein:

a. said system is configured to drain water from a land surface to said plurality of conveyance channels;

b. said plurality of conveyance channels are configured to empty said water into said optional water discharge outlet point; and

c. said plurality of infiltration tunnels are configured to drain said water to a bedrock or saprolite.

14 . A method of draining water from a land surface to a desired storage area, the method comprising the steps of:

a. draining said water from a land surface to a plurality of conveyance channels,

wherein:

said plurality of conveyance channels are excavated in a landscape parallel to the surface of said landscape;

said plurality of conveyance channels are distinct and separated by a different material;

said plurality of conveyance channels are arranged in a network configuration and configured for receiving and routing water flow; and

a top layer of said plurality of conveyance channels comprises sand;

b. emptying said water from said conveyance channels down to bedrock or saprolite through a plurality of infiltration tunnels,

wherein:

said plurality of infiltration tunnels are excavated down vertically from said plurality of conveyance channels;

said bedrock or saprolite is connected directly to said plurality of infiltration tunnels; and

said plurality of infiltration tunnels are drilled directly under impervious surfaces; and

c. optionally emptying said water from said conveyance channels into a water discharge outlet point.