University of South Florida

### Question Description

I need help with a Geology question. All explanations and answers will be used to help me learn.

Please answer my questions thoroughly, I really need to get a high grade in this assignment. Thank you so much for the help.

Thanks,

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## Final Answer

Hi! Here are those geology questions, let me know if you have any questions!It was great working with you!

1.

2.

3.

4.

5.

B, Low Viscosity, Low Gas

A, High Viscosity, Low Gas

C, High Viscosity, Low Gas

D, High Viscosity, High Gas

When a volcano erupts there are multiple factors that go into the type of eruption

and its severity. The type of eruption that will be most hazardous is one with high

volatility and high viscosity. Generally high volatility is paired with low viscosity but

in this scenario as the gas is released during eruption the viscosity is increased and

the eruption is explosive.

6. Graph

7. The peak discharge for the 100-year flood is about 70,000 cfs. The data values are

for an interval of 25 years. 2001 would be the 26th year. Using the log-log plot most

of the recurrence intervals are in a 10 year period but of the 52 data points only 1

falls between 20-30 years. The probability in 2001 would be 1/52 or 1.92%.

8. The recurrence times for the data from 1975-2000 is given by the equation

Recurrence time = n+1/rank , n=# years on record. The recurrence time is 25+1/1

= 26 years. Looking at the chart there is only 1 data point around this interval so the

probability of it occurring is 1/52 or 1.92% each year.

9. After the Army Corp of Engineers raised the levees the overflow of the river was

changed. The levees are built to prevent overflow so the new data would show that

the river had lower overflow levels compared to the pre 1975 data. This would

suggest water levels were declining when they are not.

10. The recurrence time for such a flood in 2006 using the data from 1975 to 2000 is

calculated using the equation: Recurrence time = n+1/rank ...