How would a hydrograph for a drainage basin change if major urban growth were to occur upstream?
a. The hydrograph would be higher and narrower.
b. The hydrograph would be both higher and longer.
c. The hydrograph would be lower but longer.
d. The hydrograph changes only with wildfire, logging, or overgrazing, not urban growth.
e. The hydrograph becomes skewed, rising more slowly but dropping very quickly.
Question 2
How do debris flows tend to move?
a. at constant speed
b. fast initially, then slower before stopping
c. slow initially, then faster before stopping
d. in surges or waves, leading with fine sediment particles
e. in surges or waves, leading with coarse boulders
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