An arroyo is a dry river bed or seasonally active creek. They are usually found in deserts or other arid climates and completely dry up between periods of wet weather.
Spanish; akin to Latin arrūgia mine shaft, 1800-1810
California's Arroyo Seco is a well-known arroyo. Arroyos can also be man-made to distribute water or prevent flooding during heavy rains, such as in Albuquerque, New Mexico where several miles of open-air concrete lined channels drain into the main North Diversion Channel.