Answer the questions

1) Where is an intake structure required at?

2) What does it depend on?

3) What are they provided with?

4) Where is it necessary to place the lowest ports? Why?

5) What does a wet intake tower consist of?

6) Why does a dry intake tower have no water inside?

7) What is an advantage of the dry towers?

8) How must intake towers be designed?

9) What does a submerged intake consist of?

10) What should the entrance to intakes and sluiceways be provided with?

11) How may the debris accumulated on the rack be removed?

12) What are most intakes and sluiceways provided with at their entrance?

13) What gates can be used to close the flow into large intake towers of the wet types?

14) Are interior gate valves often used to regulate flow for smaller heads?

15) In what position are interior gate valves used?

16) What is water flowing over a spillway or through a sluiceway capable of?

17) When does a hydraulic jump occur?

18) What do the location and character of the jump depend on?

19) Why will the depth of the flow gradually increase?

What valves and gates are used for different heads at the entrance of intakes and sluiceways? Fill in the table.