Question $2$

Three piezometers $($A$,$ B$,$ and C$)$ are located $1000$m apart $($in a line$)$ in unconfined aquifer. Calculate for all the blank spaces in the table below. Show clearly all the steps in the calculations and avoid putting down final answers only.

$\backslash$table$[[$Piezometer$,$A$,$B$,$C$],[$Ground surface $($mamsl$),450,435,430],[$Depth of piezometer $($mbgl$),,,70],[$Depth to water level $($mbgl$),27,,50],[$Pressure head $($m$),53,,],[$Elevation head $($m$),,335,],[$Total head $($m$),,400,],[$Hydraulic gradient $($m$/$m$),]]$

Answers:

$\backslash$table$[[$A$,$B$,$C$,,],[,,,,],[80,100,,,],[,35,,,],[,65,20,,],[370,,360,,],[423,,380],[0\mathrm{.}023,0\mathrm{.}02,,,]]$

Note: mamsl $=$ meters above mean sea level; mbgl $=$ meters below ground level Similarly use the sketch above to solve question $2.$

Hydraulic gradient btn total head at $A-$total head at $B$ distance btn $A$&$B.$