Exam 10: Coasts, Beaches, and Estuaries

Transport of dissolved materials out of an estuary can be estimated from the net T₀ transport and its concentration of dissolves materials.

Which combination holds true in a partially mixed estuary?

The coastal zone includes both water areas and land areas.

If the salinity of ocean water at the entrance to an estuary is 30 percent and the average salinity of the estuary is 20 percent, what fraction of the volume of water in the estuary is fresh water?

The beach face can have a low region that remains flooded at low tide. This is called a ________.

In a shallow, well-mixed estuary such as Delaware Bay, the inward transport of salt is controlled by ________.

In a partially mixed shallow estuary, the net seaward flow occurs at ________.

Inverse estuaries are generally found between ________.

Chesapeake Bay is a ________.

Tidal currents in an estuary are primarily responsible for mixing.

A coast with fjords is classified as a(n) ________.

Pollutants that adhere to suspended particles in an estuary are usually flushed from the estuary by the net circulation.

Sand dunes are found along coasts in which the sand is transported ________.

An estuary that is found within the mouth of a river where freshwater flows out to sea at the surface while seawater flows upstream along the bottom is ________.

A beach in dynamic equilibrium

Rip currents move water toward the beach.

A beach that is fed by mixed sizes of rocks and particles but shows only large rocks on its surface is ________.

A semienclosed sea at 30°N is most likely resupplied with seawater at depth.

In a deep fjord with a shallow entrance sill, the deep-basin water is probably ________.

In a fjord with a shallow entrance sill, the outgoing flow (T_o) is approximately equal to ________.