Choose the best endings to the following statements.

1. Waves may do harm to the structures…

a) which are located far from the water. b) located near the water.

c) situated above the water.

2. Wind tide is caused by…

a) the action of the wind. b) the action of the waves. c) the action of water.

3. Waves are caused by…

a) the action of the wind. b) the action of water.

c) the tangential forces between the wind and water.

4. When waves grow in size, their speed…

a) increases. b) reduces. c) falls.

5. Growth of wind speed and wave speed stops when…

a) the wind speed disappears. b) the speeds become equal.

c) the waves reach the shore.

6. In the reservoir only winds occurring …

a) during the season of minimal water level should be considered.

b) at the period of maximum water level should be considered.

c) in winter and summers should be considered.

Answer the questions.

1) What may waves in reservoir damage?

2) What is wind tide caused by?

3) Where are wind tides generally larger?

4) What happens when wind begins to blow over a smooth water surface?

5) When are waves critical?

6) What are the main rules for choice of reservoir sites?

Match the beginning of the sentences with their endings.

1) The cost of real estate for the reservoir … 2) A suitable dam site … 3) The quality of water … 4) The reservoir site … 5) Areas productive of sediment … 6) A deep reservoir … 7) The quantity of leakage …

must (not) should (not)

a) … exist. b) … be excessive. c) … be avoided. d) …be satisfactory. e) … have adequate capacity. f) … be preferable. g) …be computated.

Read the text again, title it and make the plan of it.