Each water master shall report to the state engineer, as often as may be deemed necessary by the engineer as to the amount of water needed to supply the requirements of his districts, the amount available, the works which are without their proper supply, the supply required during the period preceding his next regular report and such other information as the engineer may require. These reports shall, at the end of each irrigation season, be filed in the office of the state engineer. The state engineer shall give directions for correcting any errors of apportionments that may be shown by such reports.