Glossary

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Glossary terms for letter: E

Earth Embankment Dam:

The typical Earth Embankment Dam has several feature shown here. An earth embankment constructed of compacted fill materials depending on the site conditions and foundation material to preclude and or control seepage of the water through and under the dam. Various design examples are shown on the sketches that follow. In addition, an emergency spillway is provided to pass large quantities of water during floods to prevent overtopping of the dam. Finally, a control house operates a set of gates which controls the amount of water passing through the outlet works to maintain flow in the river downstream of the dam during normal operations of the dam.

Encroachment:

Any physical object placed in afloodplain that hinders the passage of water orotherwise affects flood flows, e.g. landfills, buildings.

Equilibrium:

A state of balance or equality of opposing forces.

Erosion:

The wearing away of the land surface byrunning water, wind, ice, or other geologicalagents.