HKDSE Geography/M2a/Fluvial Morphometry

Fluvial morphometry describes what rivers are shaped like. You don't have to know the word - it's just that a title was needed for this section.

Stream order
The stream order is counted from streams flowing from the source.
 * When two first-order streams meet, they form a second-order stream.
 * When two third-order streams meet, a fourth-order stream is formed.
 * When a second-order stream meets a third-order stream, a fourth-order stream is formed.
 * etc.

Drainage Density
This may appear in map-reading questions.

Drainage Pattern
A drainage pattern is the 'shape' of the river system. Usually, it suffices to be able to identify each. The formation of each pattern is included, just in case.