Fill in the correct prepositions then choose any five items and make sentences

1) to be effected ___ smth.; 2) the size ___ the reservoir; 3) to be constructed ___ natural conditions; 4) to be determined ___ surveys; 5) to be subdivided ___ smth.; 6) to enter ___ smth.; 7) to be located ___ smth.; 8) to be dependent ___ smth.; 9) to vary ___ smth. ___ smth.; 10) to result ___smth.

Find the translation of the following terms and memorize their meaning.

stream turbulence probable

suspended particles to reduce trap

a river bed to deposit sufficient

bed load to remain to warrant

gravity a sluiceway to prevent

to settle a turbine to retard

upward currents spillways to select

to counteract velocity to ensure

efficiency to compare prolonged

sediment completion linearly

sedimentation to carry useful life

Read the text to get the gist of it. Answer the following questions.

a) Do all suspended particles deposit in the reservoir?

b) What does the useful life of a reservoir depend on?