What happens to the river/estuary when the wind changes direction?

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!