Produced water is collected and fed to a group of $3$ holding ponds. The first pond is the largest $(6$ Ha$),$ the other two ponds are $2$ Ha each. Average depth in all three ponds is $2$m$.$ The ponds are uncovered. There is accumulation of suspended solids at the base of the pond, a process that is very poorly characterised. Water is pumped from the terminal feed pond to the water treatment facility $$ the facility processes up to X ML$/$d$.$ The feature of the first stage of the treatment facility $($stage $1)$ is reverse osmosis $($RO$)$ membrane treatment. The outputs from RO are a clean permeate stream and a concentrated brine stream $($Permeate recovery is designed to be $80\%).$ The concentrated brine stream undergoes further processing for volume minimisation $($stage $2).$ Stage $2$ is thermal evaporation, which concentrates the brine by a factor of Y$.$ The clean permeate stream is sent to the permeate discharge tank where it is cooled prior to being either discharged Jackson River or blended with pond water and used for irrigation $($max TDS for irrigation is $1\mathrm{.}5$ g$/$L$).$ The concentrated brine is collected in secured brine ponds. Do a DOF analysis on the system and subsystems.