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Parameter Sensitivity in Hydrologic Modeling - page 91 / 163

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Table 4.7 shows the results from the study using a 10 meter DEM to extract watershed parameters in WMS.

Area

Perimeter

Watershed

(mi2)

(mi)

Area 1

0.53

4.09

Area 2

1.66

8.53

Area 3

8.76

19.85

Longest Flow

Slope

Path (mi)

(%)

1.54

1.25

3.15

1.41

6.81

0.77

Table 4.7: 10 Meter DEM in WMS Results

4.4.2.2 30 Meter DEM

The 30 meter digital elevation data used for the WMS study are also the same as those used for the CRWR-PrePro study. The same grid that was clipped for the CRWR-PrePro study was imported into WMS as a grid ascii file, using the import data command. Once this was done the DRG for the area was placed in the background to locate the study area. TOPAZ computed the flow direction and flow accumulation.

Figure 4.14 shows the area of Area 1 to be 0.53 mi2.

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