Wallachian Plain
The Danubian Plain is contiguous with the Wallachian Plain (forming the Lower Danubian Plain), but the relief is hilly, featuring numerous plateaux and river valleys. The climate is markedly temperate continental with a weak Black Sea influence in the east. Precipitation is on average 450–650 mm a year. Important rivers include the Danube, the Iskar, the Yantra, the Osam, the Vit, the Rusenski Lom, the Ogosta and the Lom.