Which term describes a water body that contains water throughout the year except during periods of severe drought?

Which term describes a water body that contains water throughout the year except during periods of severe drought?

• A. Perennial Stream
• B. Perennial River
• C. Intermittent Stream
• D. Disappearing Stream

Answer: (B)

Perennial describes a water body that maintains surface water for most of the year, with only rare interruptions during extreme droughts. In this context, a perennial river best matches that pattern: it normally has water year-round, and only under severe drought would it potentially dry up. A water body that is constantly flowing would still be called perennial, but the term emphasizes the larger, long-lasting stream—hence perennial river fits as the description of a substantial, year-round watercourse. The other terms imply less regular flow: intermittent or disappearing streams don’t sustain water through the year, even in non-drought periods, so they don’t match the description. A perennial stream would be similar in concept, but the wording here points to a larger channel, hence the perennial river.

Perennial describes a water body that maintains surface water for most of the year, with only rare interruptions during extreme droughts. In this context, a perennial river best matches that pattern: it normally has water year-round, and only under severe drought would it potentially dry up. A water body that is constantly flowing would still be called perennial, but the term emphasizes the larger, long-lasting stream—hence perennial river fits as the description of a substantial, year-round watercourse. The other terms imply less regular flow: intermittent or disappearing streams don’t sustain water through the year, even in non-drought periods, so they don’t match the description. A perennial stream would be similar in concept, but the wording here points to a larger channel, hence the perennial river.