Please refer to the figure below for both Questions 4 and 5. The figure displays

Question

Please refer to the figure below for both Questions 4 and 5. The figure displays dissolved en near bottom at CSI-6, 20 m water depth offshore of Terrebonne Bay. Dissolved Oxygen Near Bottom at CSL-06 CSi-6 3.5 3.5 0 3 E 25 25 1.5 0.5 0.5 4. What is the cause for the rapid drop in dissolved oxygen values at our station in the hypoxic area in 20 m offshore in the figure above? (2 points) 5. Calculate the loss in oxygen as a value (mg/L) per hour for the period of May 10 through May 17. Value should be in mg 02 per liter per hour. OR, 02 mg I-1 hr-1 (2 points) English (uS

Explanation / Answer

4). Rapid drop of dissolved oxygen can be done due to-

5).

DO on 10th may = 3.5 mg/L

DO on 17th may = 0mg/L

loss of DO = 3.5-0 = 3.5 Mg/L

7 days = 24x 7 hours= 168 hours

loss in oxygen = 3.5/ 168 = 0.0208 Mg/(L-hr)

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