Normal depth refers to the water level, or depth, at which a river or stream would run under normal conditions. There are several synonyms for the word normal depth, all of which can be used interchangeably. Water level, water depth, river level, stream depth and average depth are all synonyms for this term. These terms are commonly used by hydrologists, fishermen, boaters and anyone else who regularly deals with water levels. Understanding the normal depth of a body of water is crucial for safety, navigation, flood control and more. By using these synonyms, individuals can communicate more effectively when discussing water levels and the importance of understanding them.