CE322 Basic Hydrology
Jorge A. Ramírez

Homework No. 6
Assigned on March 22, 2000
Due on March 27, 2000

1. Do problem 10.3 from your textbook.

2. For the basin of Problem 10.3:

  1. Use the Strahler ordering scheme to order the drainage network and determine the order of the basin, W.

  2. Estimate the Bifurcation Ratio, RB, and the Length Ratio, RL.

  3. Estimate the average length of overland flow, Lo. The average length of overland flow is defined as Lo = 1/(2 Dd). The average length of overland flow is a measure of the average distance from the drainage divide to a stream channel.

3. Obtain estimates of the Bifurcation Ratio, RB, the Length Ratio, RL, and the Area Ratio, RA, using the data tabulated below. In addition, for the same data, determine a) the area of the basin, b) the total length of streams, c) the drainage density, Dd, and d) the average length of overland flow, Lo.

Order, w

Number of Streams

Average Length (km)

Average Area (km2)

1

50

1.5

4

2

13

4

12

3

8

9

36

4

3

23

108

5

1

59

324