Measuring Streams

Question 0

First order steams: (2)

Answer 0

No branching.

Smallest stream sections.

Question 1

It takes two streams of the

Answer 1

Same order to raise to the next stream order downstream.

Question 2

Second order streams are a

Answer 2

Combination of two first order streams.

Question 3

Third order streams are

Answer 3

A combination of two second order streams.

Question 4

Law of stream numbers: higher order streams in a basin are

Answer 4

Less abundant than lower order streams. The decrease in abundance occurs in a regular fashion.

Question 5

Law of stream numbers: The bifurcation ratio (Rb) is the

Answer 5

Ratio between the number of stream segments in one order and the next.

Question 6

Law of stream numbers: Bifurcation ratio -

Answer 6

Generally between 3 and 5.

Nu = Rb ^(k-u)

k - highest stream order.
u - stream order

Question 7

Law of stream numbers:

Bifurcation ratio (Rb) =

Answer 7

Nu / Nu+1

Nu - number of streams in given order.
Nu+1 - number of streams in next highest order.

Question 8

Law of stream lengths: High order streams are

Answer 8

Longer; the length increases in a regular way.

Question 9

Law of stream lengths:

Length ratio (RL) =

Answer 9

Lu / Lu-1

Lu - mean length of streams in order u
Lu-1 - next lowest order.

Question 10

Law of drainage density: A measure of

Answer 10

The length of the stream channel per unit area of the drainage basin.

Question 11

Law of drainage density:

```
Drainage density (Dd) =
Km km-2
~~~

Answer 11

Σ(Nu x Lu) / Ab

Nu x Lu) - Total stream length (km
Ab - Basin area (km2)