4) Mean water levels of 29 years of flood events are measured in the Sakarya River. Observed water levels (in cm) are given below: 547, 709, 833, 714, 522, 613, 656, 562, 482, 757, 683, 587, 501, 601, 805, 701, 463, 635, 912, 738, 766, 645, 729, 434, 579, 535, 789, 1031, 450, a) Show that the observed values fit the log-normal distribution. Explain the reasons. b) Find the values for 50,100, 250, 500 and 1000-year periods by using the frequency factor method.

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4) Mean water levels of 29 years of flood events are measured in the Sakarya River. Observed water levels (in cm)
are given below:
547, 709, 833, 714, 522, 613, 656, 562, 482, 757, 683, 587, 501, 601, 805, 701, 463, 635, 912, 738, 766, 645, 729,
434, 579, 535, 789, 1031, 450,
a) Show that the observed values fit the log-normal distribution. Explain the reasons.
b) Find the values for 50,100, 250, 500 and 1000-year periods by using the frequency factor method.
Transcribed Image Text:4) Mean water levels of 29 years of flood events are measured in the Sakarya River. Observed water levels (in cm) are given below: 547, 709, 833, 714, 522, 613, 656, 562, 482, 757, 683, 587, 501, 601, 805, 701, 463, 635, 912, 738, 766, 645, 729, 434, 579, 535, 789, 1031, 450, a) Show that the observed values fit the log-normal distribution. Explain the reasons. b) Find the values for 50,100, 250, 500 and 1000-year periods by using the frequency factor method.
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