QUESTION 29 Rainfall and streamflow at Peachtree Creek, Dec. 24, 2002 7500 6,000

Question

QUESTION 29 Rainfall and streamflow at Peachtree Creek, Dec. 24, 2002 7500 6,000 4,500 3,000 1,500 0.40 -Streamflow Rainfall0.32g 0.24 0.16 0.08 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 Hours The graph depicts rainfall and stream discharge during a flood event along Peachtree Creek on December 24, 2002. Which of the following can be inferred from the graph? O Creek water levels peaked 3 hours after the rain fell hardest. O Water levels in the creek returned to base levels by the end of the day. o Creek levels subsided as quickly as they rose. O Most of the rain fell during the time period from 8 a.m. to 5 p.m (17:00)

Explanation / Answer

If we see the graph we’ll find that even by the end of the day the water level is not at the base level and hence option b is incorrect.

Option c is also incorrect as the level rise very exponentially while the decline curve is not that steep and hence we can’t say that the creek level subsided as quickly as it rose and hence it is also false.

Option d is also incorrect because the rainfall is at its level high at around 6 am and hence we can’t say that most of the rain fell during 8am to 5 pm therefore it is also incorrect.

Option a is correct as the rain fell hardest at around 6 am and the level of the creek is maximum at about 9am which is approximately 3 hours and hence option a is correct.

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