Changes

==Construction, operations and maintenance==

Operation of a reservoir consists of opening and closing the inlet and outlet valves and sluices, according to water need in the system and water quality at the inlet. The valves and sluices should be opened and closed at least every two months to prevent them sticking. At least once a year, the reservoir should be emptied of sediment and cleaned, and the lining inspected and disinfected with chlorine. Cracks or other damage to the lining should be repaired. Usually, the cleaning of a reservoir is a communal activity, which can be organized by a water committee that coordinates all the activities related to the system. An individual living near the reservoir can be assigned the job of caretaker.