ocr: The River Nile The River Nile - the. longest: triver in the world. Everyyear, the Nile wouldoverflow itsbanksa and floodthe: surrounding areas. When the watersreceded,arich fertilelayer ofsoil wasleftbehind, enablingcropsto grow talla andstrong. Without the Nile, ancient Egyptian civilization could never haveflourished.