In situ fluid diffusion apparatus and system

An irrigation apparatus for diffusing a gas and liquid mixture within a soil or aggregate environment comprising:

• a rigid tunnel elongated along a length, having an outer surface formed as a substantially convex surface and an inner surface formed as a substantially concave surface, wherein the inner surface of the rigid tunnel defines one or more channel sections formed along the length of the tunnel, the one or more channel sections comprising,
• a substantially horizontal, planar channel base positioned at a tunnel apex, and
• opposing channel sides having multiple apertures formed therethrough, located in proximity to the channel base,
• the rigid tunnel shaped substantially in the form of a catenary arch having lateral corrugations repeating along the length of the tunnel comprising multiple outwardly corrugated portions interspersed by inwardly corrugated portions,
• the rigid tunnel comprising a tunnel base formed along the length of the tunnel at an edge of the rigid tunnel for maintaining the rigid tunnel at a desired position, each outwardly protruding lateral corrugation being wider at the tunnel base than the tunnel apex, and
• the outwardly protruding lateral corrugations comprising apertures formed therethrough in proximity to the tunnel base
• wherein the rigid tunnel is adapted to receive a pressurized gas and liquid mixture within a perforated fluid pipe having perforations along it's length positioned beneath the substantially concave surface of the rigid tunnel, the rigid tunnel being capable of use with the perforated fluid pipe and one or more supporting means so as to direct the pressurized mixture through the perforations in the pipe to strike the channel base and aerosolize the mixture.