Q$3($a$)$ What do you understand by the term stream gauging? Explain the types of streams gauging.

$($b$)$ The discharge data of $10$ years for the river is given below. Draw & plot the flow duration curve for the river and determine the $80\%$ dependable discharge

$\backslash$table$[[Q(\frac{m^3}{s}),10,40,70,100,150,180,90,80],[\backslash$table$[[$No$.$ of$],[$occurrence$]],2,5,4,6,9,3,7,8]]$