A reservoir is a man-made body of water used to store water for populations to use. Reservoirs are used to provide water for drinking, cooking and bathing. They provide farmers with a source of water for their crops. Reservoirs are also used as a source of recreation for boaters, swimmers, and vacationers. Readers will be amazed to learn about the history of reservoirs and the scientific and technological advances that make them possible. This volume places a strong emphasis on STEM topics, and represents both social studies and science curricula. Historic photographs, color images, and detailed diagrams help readers grasp technological and scientific concepts with ease.