A modular porous swale filtration system. The modular porous swale filtration system may comprise one or more modular porous swales, absorption media, liner, and perforated pipe. Each modular porous swale may have a porous concrete block and filtration joint. The porous concrete block may snugly fit within a trench having a lower portion filled with the absorption media. The absorption media may include gravel, activated alumina, bone char, or an activated alumina and bone char mixture. The porous concrete block may have a top surface inwardly-sloped to a nadir. The filtration joint may be disposed within the porous concrete block and along the nadir. The liner may cover one or more surfaces of the trench. The perforated pipe may be located within the absorption media. The filtration joint may substantially align above a portion of the perforated pipe when the modular porous swales are installed within the trench.

An impact-absorbing assembly includes a covering layer being one or more of artificial turf, rubber mats, polymer mats, short pile carpeting, particulate infill, wood chips, and ground rubber chips. Also included is a layer of underlayment panels positioned beneath the covering layer. The panels have a panel section with a plurality of drain holes formed therethrough. A top surface of the panels is configured to support the covering layer. A bottom surface of the panels has a plurality of bottom projections that cooperate to define bottom channels suitable to permit water flow across the bottom surface, the bottom channels being in fluid communication with the panel drain holes. The bottom projections define a first spring rate characteristic that is part of a first stage and a second spring rate characteristic is part of a second stage, the first stage having a smaller volume of material than the second stage.

A ground stabilization grid which includes a series of polygonal shaped cells having x sides. The cells are formed by polymer walls having a wall height of between about 1 and about 6. Each cell shares a common wall section with at least two adjacent cells; and a majority of cells within the grid includes at least two reinforcing ribs extending across the cell to engage opposing walls of the cell. The reinforcing ribs are characterized by (i) engaging the cell walls between about 25% and about 75% of the wall height, and (ii) extending between different opposing walls of the cell.

A paving block system comprising a plurality of paving block units (A) and a plurality of paving block units (B) interlocked together to form a paving block system. The paving block units each comprise at least two channels formed along a bottom face of the paving block units. The channels of the paving block units (A) are in fluid communication with the channels of the paving block units (B) when the paving block units are interlocked together to form the paving block system configured for storage and/or drainage of fluid.

A method for permeable pavement of dirt interception comprises laying a permeable structure layer with a toothed groove between the base layer and the transition surface of the cushion layer or directly setting the upper surface of the cushion layer as a toothed structure; in the base layer, laying at least one layer of dirt interception trough; providing a water-permeable coating or fine sand at the bottom of the sewage interception trough; the present invention traps the dirt between the base layer and the cushion layer that are most likely to cause void blocking in the base layer, close to the shallow part of the surface layer is used to remove dirt by high-pressure flushing operations.

An integrated ground surface system is provided for collecting and recycling de-icing fluid. The system includes: a permeable ground surface layer; a containment area located below the permeable ground surface layer, and comprising an impermeable liner to collect the de-icing fluid; a reservoir in fluidic communication with the containment area for storing the de-icing fluid; and an applicator device in fluidic communication with the reservoir to dispense the de-icing fluid.

An impact-absorbing assembly includes a covering layer being one or more of artificial turf, rubber mats, polymer mats, short pile carpeting, particulate infill, wood chips, and ground rubber chips. Also included is a layer of underlayment panels positioned beneath the covering layer. The panels have a panel section with a plurality of drain holes formed therethrough. A top surface of the panels is configured to support the covering layer. A bottom surface of the panels has a plurality of bottom projections that cooperate to define bottom channels suitable to permit water flow across the bottom surface, the bottom channels being in fluid communication with the panel drain holes. The bottom projections define a first spring rate characteristic that is part of a first stage and a second spring rate characteristic is part of a second stage, the first stage having a smaller volume of material than the second stage.

A ground covering comprising: a base panel including a sheet with an array of protrusions extending therefrom; a top panel including an array of receptacles for mating with at least a number of said protrusions; one or more drainage conduits formed through each of the protrusions, each drainage conduit being at least partially occluded by a baffle; and complementary engagement formations on peripheries of the protrusions and of the receptacles for fastening the top panel to the base panel.

Systems and methods for a ground water filtration system are described. The ground water filtration system includes paver blocks designed to facilitate liquid seepage between the paver blocks and to route the seepage to a preferred area. The ground water filtration system additionally provides at least one layer of stone to facilitate flow direction of the seepage to an outflow pipe. At least one geogrid fabric is also provided to further enhance ground water filtration.

A linkage brick assembly, comprising: a least one first linkage brick, at least one second linkage brick and at least one third linkage brick, each linkage brick comprising a top face, a bottom face and four side faces between the top face and the bottom face. Each of the side faces of the first linkage brick forms a traverse engaging groove extending laterally. Each of two opposite side faces of the four side faces of the second linkage brick forms a traverse engaging protrusion extending laterally and each of the other two opposite side faces forms a vertical engaging portion extending vertically. Each of the side faces of the third linkage brick forms a vertical engaging groove extending vertically. Each of the traverse engaging grooves of the first linkage brick is used to engage with each of the traverse engaging protrusions of the second linkage brick through lateral sliding. Each of the vertical engaging grooves of the third linkage brick is used to engage with each of the vertical engaging protrusions of the second linkage brick through downward sliding. Due to the above structures, fast assembly of the linkage brick assembly of a large area can be achieved by means of the interlocking of only three types of linkage bricks.