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Parameter Sensitivity in Hydrologic Modeling - page 49 / 163

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3.3.2

Parameter Extraction

Figure 3.10 shows an example of a map-based model along with its length,

area, each

and perimeter shapefile give

attributes. Information the length, area, and

provided perimeter

in the attribute tables for

for

each

shape.

Slope,

determined using the same method as with paper maps, is calculated subtracting the contour value at the outlet from the contour value at the start of longest flow path. The difference in elevation is then divided by the length of longest flow path.

by the the

39

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