Abstract: An improved modular green roof system for installation on a roof includes: (a) trays, each having a surface chosen from the group of sidewall, bottom and a combination of such surfaces, and having drainage openings that limit the movement of planting media through the surface while promoting maximum root growth and water and moisture transport through the surface, (b) a water management passage, (c) a structural member that extends across each of the trays and attaches to the opposing bottom sidewall to provide rigidity to each tray, (d) locking members for use with the trays, and wherein each of the trays have a locking opening configured to accommodate one of the locking members, (e) stacking members for use with the trays, and wherein each of the trays have a stacking opening configured to accommodate the insertion of one the stacking members, (f) a slope stabilization device, a portion of which is configured to be accommodated in water management passages, and (g) a water retention medium configured for p

Abstract: An improved underground water storage tank having a joined-doughnut (multiple-torus) configuration, preferably a double torus although single, triple, quadruple and other toroidal configurations are possible. The concept entails a lateral merger of two or more toroidal tank sections in a multi-compartment double, triple, or greater-toroidal configuration with one or more cylindrical access ports traversing the tank orthogonally at the area of merger or along the perimeter. The tanks may be unitary as formed by rotational-molding or blow-molding. The laterally-joined torus sections increase the structural strength of the tank so that the need for reinforcing ribs or internal supports is substantially eliminated. The strength of the torus-configuration allows the tank to be buried below the frost line, and the elimination of molded ribs avoids trapped fluid or so that nearly all tank capacity can be utilized.

Abstract: An improved underground water storage tank having a joined-doughnut (multiple-torus) configuration, preferably a double torus although single, triple, quadruple and other toroidal configurations are possible. The concept entails a lateral merger of two or more toroidal tank sections in a multi-compartment double, triple, or greater-toroidal configuration with one or more cylindrical access ports traversing the tank orthogonally at the area of merger or along the perimeter. The tanks may be unitary as formed by rotational-molding or blow-molding. The laterally-joined torus sections increase the structural strength of the tank so that the need for reinforcing ribs or internal supports is substantially eliminated. The strength of the torus-configuration allows the tank to be buried below the frost line, and the elimination of molded ribs avoids trapped fluid or so that nearly all tank capacity can be utilized.