Large streams are rivers .
The longitudinal profile is the change in gradient over the length of stream and is typically concave up. Streams are graded to base level, which is where stream flow and bed erosion ceases. Types of streams 1. So don't build your house on the outer edge of a meander. Ephemeral and Perennial streams- ephemeral, like the streams around New Mexico, only have flow for a small portion of the year, they are almost always braided streams due to the rapid changes in discharge.