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Fig. 10.44bc. Fig. 10.44a. Fig. 10.38. Fig. 10.45. Fig. 10.9. Fig. 10.39. Fig. 10.17a-b. Fig. 10.17c. Fig. 10.29a. Fig. 10.29b. Fig. 10.26. Fig. 10.28ab. Fig. 10.27. Fig. 10.24. Fig. 10.28c. Fig. 10.5. Watershed/Drainage basin.
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Watershed/Drainage basin The area drained by a stream system. Can be very small or very large.
“100” Year Flood • R = (n+1)/m R = recurrence interval n = years of record m = rank
Examples R = (90+1)/2 = 45.5 About 2% chance each year R = (90+l)/1 = 91 About 1% chance per year
Waterfalls • Caused by underlying incompetent rock that is eroded away.