dam
A dam is a structure installed to store or withdraw runoff water from a river for flood control, water utilization, or power generation. In Japan, a dam is defined as having a height of 15 m or more from the foundation to the top of the embankment (Article 44 of the River Law). In the world, according to the definition of the International Conference on Large Dams, a dam is defined as having an embankment height of 5.0 m or more and a water storage capacity of 3 million cubic meters or more.