


In US usage "ravine" and "gulch" usually imply large geological formations (and these located in drier areas). "Gully" would be the closest to what's shown in the pictures, but it's usually used for formations in drier areas, like deserts and prairies, while the picture seems to show a wet area, like in a rain forest. I personally would describe the pictures as a runoff stream (when the water is running after a rain) and a dry stream bed (when there's no rain).
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
All over Hawaii, wet ravines are labeled as "gulch(es)". I taught geography for 5 years and was honestly the first time I saw this intriguing word! Came back from the trip and watched NOPE and the synopsis write up uses the word gulch to describe the setting, although dry and out west in the USA . Super interesting...