Using Map T-3, determine the gradients of the two first-order streams labeled “a” and “b” on the map above, the second-order stream labeled “c” on the map above, as well as Eds Creek after it has become a third-order stream. Determine stream length to the nearest 0.1 mile (take your measurements from Map T-3, not the small map above) using the graphic scale provided.

The following questions are based on Map T-3, the “Deer Peak, Montana” quadrangle (scale 1:24,000; contour interval 40 feet), and Figure 39-3, a stereogram of the same area showing the drainage basin of Eds Creek (46°54'26"N, 114°31'02"W).




Environmental & Atmospheric Sciences

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