The present invention is directed to below grade fluid containment structures, which may include a foam floor and a foam wall extending upward from the floor, the foam wall being formed from foam panels and optionally a plurality of metal splines. A foam buttress is provided as part of or adjacent to the foam wall, for reducing pressure against an exterior face of the foam wall that would otherwise be exerted by the soil, in the absence of the foam buttress, which places a top portion of the soil at an angle of repose, to minimize inward pressure. A concrete footing can be provided below the foam wall, where the splines of the wall are vertically oriented in the foam wall, with a bottom of the splines anchored into the concrete footing. The interior surface of the pool or other structure can be coated with any desired finish coating.

Below grade fluid containment structures, which may include a foam floor and a foam wall extending upward from the floor, the foam wall being formed from foam panels and optionally a plurality of metal splines. A foam buttress is provided as part of or adjacent to the foam wall, for reducing pressure against an exterior face of the foam wall that would otherwise be exerted by the soil, in the absence of the foam buttress, which places a top portion of the soil at an angle of repose, to minimize inward pressure. A concrete footing can be provided below the foam wall, where the splines of the wall are vertically oriented in the foam wall, with a bottom of the splines anchored into the concrete footing. The interior surface of the pool or other structure can be coated with any desired finish coating.

The disclosure provides an outdoor device for simulating a pond ecosystem comprising a plurality of simulated ponds connected together by pipelines and including an adjusting pool, a plurality of control groups and a plurality of treatment groups with different concentrations; the plurality of control groups and the treatment groups are randomly distributed in the ponds according to a random draw method or a random allocation method, and the adjusting pool is a transfer station for water inlets and outlets of the ponds. According to the device, the plurality of control groups and treatment groups are arranged in a system, achieving a scale of a middle-scale pond ecological simulation system, which can stimulate an actual complex hydrostatic ecological system including a plurality of aquatic macrophytes, algae, zooplankton, benthos and microorganisms, and evaluate the effects of the complex ecological efficiency caused by chemical pollutants entering an actual water body.

A publicly accessible urban beach entertainment complex is disclosed, with a man-made tropical, pristine-clear lagoon as the centerpiece of the complex, with surrounding entertainment, educational, sports, and commercial facilities, the complex having controlled public access and providing the look and feel of a tropical beach with clear waters and sandy beaches. In addition a method for efficiently utilizing facilities and land that are vacant, underutilized, have limited uses, or that are contiguous to or nearby recreational, educational, sports, or commercial venues is disclosed. The method providing a publicly accessible urban beach entertainment complex with a centerpiece man-made tropical-style pristine-clear lagoon. The method allows for generating revenue and increasing efficiency by pairing vacant sites, underutilized sites, limited use land, or sites that are contiguous to entertainment, educational, sports, and/or commercial venues with urban beach entertainment complexes. The complex preferably has a controlled public access, thereby allowing entrance upon payment of a fee.

The disclosure provides for pool step forms and related methods for forming steps in a pool formed by wall panels. The step forms may include a wall panel insert configured for insertion between adjacent pool wall panels. The step forms may include one or more step form brace configured to couple with the wall panel insert and, thereby, the wall panels. The step forms may include riser forms that from riser portions of the stairs when the step forms and riser forms are coupled. The pool stair forms may be filled with filling material to form tread portions of the stairs. The pool stair forms may include liner support members coupled to the step form braces and/or the wall panels that facilitate the coupling of a liner to the stairs formed by the pool stair forms and filling material.

The disclosure provides for pool step forms and related methods for forming steps in a pool formed by wall panels. The step forms may include a wall panel insert configured for insertion between adjacent pool wall panels. The step forms may include one or more step form brace configured to couple with the wall panel insert and, thereby, the wall panels. The step forms may include riser forms that from riser portions of the stairs when the step forms and riser forms are coupled. The pool stair forms may be filled with filling material to form tread portions of the stairs. The pool stair forms may include liner support members coupled to the step form braces and/or the wall panels that facilitate the coupling of a liner to the stairs formed by the pool stair forms and filling material.

A fiber reinforced concrete (FRC) plate is disclosed and used in a zero edge pool embodiment according to this invention to permit grass to grow above the FRC plate while providing sufficient load-bearing strength to support the soil there-above to allow the growth of grass up to the water's edge.

A publicly accessible urban beach entertainment complex is disclosed, with a man-made tropical, pristine-clear lagoon as the centerpiece of the complex, with surrounding entertainment, educational, sports, and commercial facilities, the complex having controlled public access and providing the look and feel of a tropical beach with clear waters and sandy beaches. In addition a method for efficiently utilizing facilities and land that are vacant, underutilized, have limited uses, or that are contiguous to or nearby recreational, educational, sports, or commercial venues is disclosed. The method providing a publicly accessible urban beach entertainment complex with a centerpiece man-made tropical-style pristine-clear lagoon. The method allows for generating revenue and increasing efficiency by pairing vacant sites, underutilized sites, limited use land, or sites that are contiguous to entertainment, educational, sports, and/or commercial venues with urban beach entertainment complexes. The complex preferably has a controlled public access, thereby allowing entrance upon payment of a fee.

The disclosure provides for pool step forms and related methods for forming steps in a pool formed by wall panels. The step forms may include a wall panel insert configured for insertion between adjacent pool wall panels. The step forms may include one or more step form brace configured to couple with the wall panel insert and, thereby, the wall panels. The step forms may include riser forms that from riser portions of the stairs when the step forms and riser forms are coupled. The pool stair forms may be filled with filling material to form tread portions of the stairs. The pool stair forms may include liner support members coupled to the step form braces and/or the wall panels that facilitate the coupling of a liner to the stairs formed by the pool stair forms and filling material.

The disclosure provides for pool step forms and related methods for forming steps in a pool formed by wall panels. The step forms may include a wall panel insert configured for insertion between adjacent pool wall panels. The step forms may include one or more step form brace configured to couple with the wall panel insert and, thereby, the wall panels. The step forms may include riser forms that from riser portions of the stairs when the step forms and riser forms are coupled. The pool stair forms may be filled with filling material to form tread portions of the stairs. The pool stair forms may include liner support members coupled to the step form braces and/or the wall panels that facilitate the coupling of a liner to the stairs formed by the pool stair forms and filling material.