Exam 7: Coastal Zones and Processes

Construction of a seawall at the back of a beach will

Construction on barrier islands is highly desirable because it stabilizes these islands.

Salt water may contribute to rapid erosion,and thereby,result in breakup of rocky cliffs through chemical reaction with the rocks.

When waves approach a beach at an oblique angle,resulting in a lateral movement of water along the shoreline a ___________ may develop.

Potentially unstable coastlines may be identified by

Given a beach influenced by littoral drift,any interception of this drift will result in deposition of sand upstream of the interception and erosion of sand downstream of the interception.

A drowned valley is one that has been blocked by seawalls and flooded.

A seawall or riprap barrier is effective in protecting only that section of shoreline along which it is constructed.

Dune rebuilding and sand replenishment are examples of Hard structural stabilization and construction of solid structures Soft structural stabilization.

Littoral drift that encounters a bay or indentation along a coast will form this

The ideal setting for constructing buildings in close proximity to an island or beach is at an elevation of approximate 5 meters or more higher than the normal high tide.

Moving the Cape Hatteras lighthouse from its shore location inland is an example of

A storm surge results from the high air pressure associated with major storms.

When sea level falls or land rises,____________ may be formed.

As tides rise and fall,the portion that is regularly washed by waves is referred to as

When sea level rises,the rate at which the shoreline retreats landward depends partly on the slope of the beach.

The best method for protecting a beach from erosion is the construction of a groin.

An active continental margin is one at which many major storms with high storm surges occur.

Barrier islands

During a storm,