(1) Whether her department has stipulated an acceptable loss of water from irrigation canals; if so, what is this acceptable loss; (2) whether an assessment of acceptable loss is regularly made and reviewed of (a) the loss of water from irrigation canals and (b) the average losses from (i) earth and (ii) concrete canals; if not, why not; if so, what are the relevant details; (3) whether any measures have been introduced to reduce water losses; if not, why not; if so, what measures; (4) whether consideration has been given to the removal of alien vegetation from the banks of irrigation canals in order to reduce water losses from these canals; if not, why not, if so, what are the relevant details?