brackish water - water where the salinity is appreciable but not at a constant high level. The salinity may be subject to considerable variation due to the influx of fresh or sea waters., riimvesi - looduslike veekogude vesi, mille soolasus on 0,5-18 promilli. Riimvesi tekib jõe- ja merevee segunedes, ariidse kliimaga aladel ka äravooluta järvedes.