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Parameter Sensitivity in Hydrologic Modeling - page 116 / 163

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Variation-

Variation-

Elasticity

LFP

Lag

Lag-LFP

Variation-

Variation-

Elasticity

Slope

Lag

Lag-Slope

Variation-

Variation-

Elasticity

CN

Lag

Lag-CN

Table 5.10

: Results from Analytical Calculations

13.2%

10.6%

10.6/13.2=0.80

9.7%

-4.8%

-2.8/5.6=-0.50

9.0%

-31.7%

-31.7/9.0=-3.52

5.2.2

Step 2: Sensitivity of Flow to Variations in Lag Time

Now that the relationships between physical parameters and SCS lag time have been quantified, the next step is to quantify the relationship between SCS lag time and discharge. Figure 5.9 below shows the process analyzed in this section in which variations in SCS lag time values are used to calculate resulting variations in discharge.

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