geology test / quiz prep and need the explanation and answer to help me learn.

Sand for beach nourishment is taken from a dredged pit (called a borrow pit) on the sea floor nearshore. How will the shorline respond?

A storm surge raises the water level uniformly along the coast. However, flooding along the wave-impacted, open coast is much greater that that along a nearby, more sheltered embayment. Why is that?
Surfers claim that waves tend to arrive in groups which generally contain one or more waves larger and often more powerful than the average. How can this be explained?

Under what conditions and where would you expect to find the fastest longshore currents? Hint: vl=1.17√(gHb)*sin(a)cos(a)
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