Earth Retention Systems are structures designed to hold back soil and prevent erosion during construction or excavation projects. They are essential for maintaining stability in areas where the ground is being disturbed, such as in the creation of basements or deep foundations. Common types include retaining walls, sheet piles, and soil nails. These systems help manage groundwater and reduce the risk of landslides, ensuring safety and structural integrity. By using various materials like concrete, steel, or timber, Earth Retention Systems can be tailored to fit specific site conditions and project requirements, making them a vital component in civil engineering.