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Dam Safety-Selecting Inflow Design Floods for Dams


Quiz Questions

1.The ______________ is the flood flow above which the incremental increase in water surface elevation downstream due to failure of a dam or other water retaining structure is no longer considered to present an unacceptable additional downstream threat.
Inflow Design Floods
Normal Flow
2. ______________ is an opening through a dam which drains the reservoir.
Breach
Inflow
3.A ______________ is a method in which the chance of occurrence of the variable involved is ignored and the method or model used is considered to follow a definite law of certainty, and not probability.
Deterministic Methodology
Concurrent flow
4.The temperature at which dew begins to form or vapor begins to condense into a liquid is called Dewpoint temperature.
True
False
5.The wearing away of a surface (bank, streambed, embankment) by floods, waves, wind, or any other natural process is called ________________.
Erosion
Routing
6.What does IDF stand for?
Inflow Design Floods
Inflow Design Foundation
Inter Design Floods
None of the above
7.A temporary rise in water surface elevation resulting in inundation of areas not normally covered by water is known as an Inflow.
True
False
8.____________ is defined as a vertical distance between a specified stillwater reservoir surface elevation and the top of the dam, without camber.
Freeboard
Design flow
9.One of the earth sciences that encompasses the natural occurrence, distribution, movement, and properties of the waters of the earth and their environmental relationships is called __________________.
Hydrology
Hazard
10.Landslide is defined as the unplanned descent (movement) of a mass of earth or rock down a slope.
True
False
11.What does PMF stand for?
Probable Maximum Flood
Probable Minimum Flood
Probable Metric Flood
None of the above
12.Probable Maximum Precipitation is the flood that may be expected from the most severe combination of critical meteorologic and hydrologic conditions that are reasonably possible in the drainage basin under study.
True
False
13.______________ is the boundary of the reservoir including all areas along the valley sides above and below the water surface elevation associated with the routing of the IDF.
Reservoir Rim
Precipitation
14._____________ is an oscillating wave in a reservoir caused by a landslide into the reservoir or earthquake-induced ground accelerations or fault offset.
Seiche
Meteorology
15.The vertical downward movement of a structure or its foundation is called as a Settlement.
True
False
16.______________is defines as a spillway that is designed to provide continuous or frequent regulated or unregulated releases from a reservoir without significant damage to either the dam or its appurtenant structures.
Service spillway
Auxiliary spillway
17.Location of the storm pattern such that the precipitation falls on a specific drainage basin to create the runoff at the site under consideration is called a ___________________.
Storm Center
Transposition
18.Surcharge is defined as the volume or space in a reservoir between the controlled retention water level and the maximum water level.
True
False
19.The junction of the downstream slope or face of a dam with the ground surface; also referred to as the _____________________.
Downstream toe
Tributary
20.Vertical height above the stillwater level to which water from a specific wave will run up the face of a structure or embankment is called as wind setup.
True
False