Figure 5.2: Coefficients of Variation
In Figure 5.2, SCS curve number is shown to give the reader an idea of the
number variation that will be applied to the remainder of the study.
Area 2, a range of curve numbers was evaluated using a curve number selected by TxDOT as a low value (85.8), and a curve number derived by STATSGO soils data along with Land Use/Land Cover data as a high value (91.7). TxDOT did not provide curve number values for Area 1 and Area 3. Instead, a range the same as used in Area 2 was applied, with the curve number derived by STATSGO soils
in Table 5.4, were used to reflect reasonable might encounter in hydrologic modeling.