Stream gradient is usually highest where?

Stream gradient refers to the steepness or slope of a stream or river, which is calculated by the change in elevation over a certain distance. In mountainous regions, streams and rivers often flow down steep slopes, resulting in a high gradient. The topography in these areas is characterized by sharp elevation changes, which allows water to flow rapidly downhill.

In contrast, plains typically exhibit gentle slopes, leading to lower gradients. Valleys can have varying gradients but are generally less steep than mountains. Deserts usually have dry streambeds that do not flow continuously, further reducing the relevance of gradient in those areas. Thus, the high elevation and steep terrain of mountain regions create the conditions for the highest stream gradients.