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Discharge

(m3/sec)

Rank, m

Recurrence

Interval, T

13-Mar-89 750

06-Mar-90 1250

28-Feb-91 1410

04-Mar-92 2890

22-Mar-93 1850

03-Mar-94 800

12-Mar-95 1000

01-Feb-96 692

04-Apr-97 1350

02-May-98 1200

16-Mar-99 850

06-Jul-00 2400

21-Feb-01 890

30-Jan-02 1480

16-Mar-03 1500

21-Feb-04 1300

12-May-05 1700

08-Apr-06 2200

01-Mar-07 1830

08-Feb-08 1120

EATS 1410

Winter term Assignment 2

Due on Monday March 21, 2011

NAME: â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦

Student number: â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦

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1. Flood frequency information can be determined from knowledge of the peak discharge

(highest discharge) in any given year provided enough years of information has been

collected. This allows one to relate the expected recurrence interval for a given discharge,

and determine the probability that a flood of a given discharge will occur in any given year.

The recurrence interval for a given discharge can be calculated by first ranking the

discharges.

a. In the table below for Dry Creek, Louisiana, fill in the Rank column. To do this,

enter a 1 for the maximum discharge that has occurred during the 20 years of

available data. The second highest discharge will be given a rank of 2, etc. with the

lowest discharge given a value of 20. (2 point)

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