EX$.16-$B

Anders Hebeler

$7$:$39$

wheres

$7$:$47$

Spiffle

Figure C Method of assigning orders to channel segments in a drainage basin. $($A$.$N$.$ Strahler.$)$

Let is Leve

$(9)$ Count the number of channel segments of each order in each basin, enter in the spaces below, and total the numbers for each order.

$(10)$ Obviously, the number of channel segments increases as order number decreases. Obviously, the rate of increase in numbers is greater than a simple doubling. What rough value expresses the rate of increase shown in the table above? $($Give to nearest simple fraction.$)$

Rate of increase in number with decrease in order: