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