Embankment dams are large structures made primarily of earth and rock materials. They are designed to hold back water, creating reservoirs for various purposes such as irrigation, flood control, and hydroelectric power generation. Their sloping design helps distribute the weight of the water evenly, making them stable and effective. These dams are typically built in a triangular shape, with a wide base that narrows towards the top. The materials used in their construction can include clay, sand, gravel, and rock. Proper design and maintenance are crucial to ensure the safety and longevity of embankment dams, as they can be vulnerable to erosion and seepage.