"retention reservoirs" in German retention reservoirs Rückhaltebecken Retentionsbecken Detailed translations for "retention reservoirs" retention reservoirs retention reservoirs(also: holding reservoirs, retention lagoons, retention basins, detention basins) Rückhaltebecken{masculine plural} retention reservoirs(also: holding reservoirs, retention lagoons, retention basins, detention basins) Retentionsbecken{masculine plural}