According to Wikipedia, a geotextile tube is a large tube shaped container made from durable, permeable geotextile fabric and filled with sand, sediment, or slurry. These tubes are commonly used for erosion control, flood protection, shoreline stabilization, land reclamation, and dewatering operations. Water can pass through the fabric while soil and sediment remain contained inside.
A shell structure is a thin, curved structural system designed to transfer loads through compression, tension, and shear stresses across its surface. These structures are lightweight yet strong, allowing large spaces to be covered without many internal supports. Shell structures are commonly made from reinforced concrete, steel, or fabric materials and are widely used for domes, stadium roofs, aircraft hangars, and auditoriums. Famous examples include the Sydney Opera House and thin-shell concrete domes designed by Félix Candela (Wikipedia).
A slot drain is a linear drainage system designed with a narrow opening that collects and channels surface water without the need for a traditional grate. It is commonly used in roads, airports, parking lots, and industrial areas because it provides efficient drainage while maintaining a clean appearance. Slot drains are valued for their durability, safety, and reduced maintenance requirements compared to conventional trench drains (Wikipedia).