Decide whether the following statements are true or false according to the text.

1) The very existence of humans, animals, and plants has not depended on the availability of water.

2) There would be no life on earth without water.

3) Chemical wastes discarded yesterday are showing up in our water supplies today.

4) The development of water resources requires the planning, design, construction and operation of facilities to control and utilize water.

5) Hydraulic engineering may be subdivided into four main branches.

6) Water-resources engineering involves only methods for control, conservation and utilization of water.

7) Flood control, land drainage, sewerage and highway culvert design are fields where water-resources engineering is used for the conservation of water in natural processes and in human society.

8) Water supply, irrigation, hydroelectric power development and navigation improvement are examples of the utilization of water.

9) Control is planned management of a natural resource or of a particular ecosystem to prevent exploitation, pollution, destruction, or neglect and to ensure the future usability of the resource.

10) Increasing population and industrial progress require less water than the civilization of the past.

Answer the following questions.

1) What has humans, animals and plants always depended on?

2) Is the supply of water unlimited by nature?

3) Does the development of water resources require the planning, design, construction and operation of facilities to control and utilize water?

4) How many branches may hydraulic engineering be subdivided into? What are they?

5) What does water-resources engineering involve?

6) What are the examples of the water control?

7) What are the examples of the water utilization?

8) What are the examples of the water conservation?

9) What points to the development of water-resources engineering in future?

10) What does the word “hydraulics” mean?

11) Why is water-resources engineering developing?