From King Dictionary of Contemporary English
Related topics: Environment & waste
conservancycon‧ser‧van‧cy /kənˈsɜːvənsi $ -ɜːr-/ noun formal 1 SGE[singular] a group of officials who control and protect an area of land, a river etc the Thames Conservancy2 SGE[uncountable] the protection of natural things such as animals, plants, forests etc SYN conservation
Examples from the Corpus
conservancythe Santa Monica Mountains ConservancyThere are various power conservancy options like three levels of screen brightness, and variable times for screen and disk power-down.