A cikin tsarin kiyaye ruwa, manyan injinan lantarki suna da mahimmanci don sarrafa hanyoyin sadarwa na ban ruwa, abubuwan rigakafin ambaliya, da samar da wutar lantarki. An tsara shi don ayyuka masu nauyi, waɗannan injina suna tabbatar da ingantaccen aiki a cikin aikace-aikace masu mahimmanci kamar canja wurin ruwa mai girma, famfo tafki, da magudanar gaggawa.