arithmetical increase method

geometrical increase method

incremental increase method

graphical method

at a distance R from the well

close to the well

at a distance R/2 from the well

none of the above

aquifers

aquiclude

filters

intakes

N = y + R

y = N + R

R = N + y

R > (N + y)

air relief valve

reflux valve

pressure relief valve

sluice valve