$[02$:$36,14\mathrm{.}01\mathrm{.}2024]$ Fatma K$$z: For a $2$ hour. $8$ mm$/$h intensity rainfall, the hydrograph given in Table is observed. The area of watershed is $500$ km$^2$

Table Propeller readings

Time

flow rate $($m$^3/$s$)$

$0$

$8+$y

$4$

$10$

$38$ty

$12$

$14$

$16$

$18$ty

$18$

$20$

$10$ y

$24$

$8-$y

$22$

$14+$y

$6$

$30$ty

$8$

$18+$y

$45$ty

$28$ty

$24$ y

$14$ y

$8-9$

y: The last digit of your student number

a$)$ Obtain $2$ hour unit $-$ hydrograph for the considered flow section

b$)$ Otrain $4$ hour unit $-$ hydrograph for the considered flow section