The recurrence interval of a flood is the:
a. statistical average amount of time between floods of a given magnitude
b. the time between two floods of a particular magnitude
c. the probability that a flood of a certain magnitude will occur in a particular year
d. the number of years of record that are necessary to calculate the 100-year flood for a stream
a
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a - arid regions b - regions above the treeline c - humid regions d - marshes e - volcanic regions
Which of the following is not an abundant radioactive element within Earth?
A) thorium B) uranium C) potassium D) curium
Sediment yield to streams is greatest during which type of land use in a drainage basin?
a. construction b. post-construction c. forest d. crop production
Dendrochronology involves the examination of annual _______________. (two words)
Fill in the blank(s) with correct word