A developer has recently purchased a $7m{i}^2$ area of land north of Houston. She is interested in determining the impact that development will have on the hydrologic response of the area. There is one main channel running through the area and the length along it from the outlet to the divide is $6$ mi $.$ The average slope in this area is $100f\frac{t}{m}i.$ To determine the comparison hydrographs, a storm with duration of $3$ hr will be used.

Pre$-$development, the area is $40\%$ wooded $($good condition$),30\%$ good condition meadow, and $30\%$ cultivated land with conservation treatment. Postdevelopment, the watershed will be $10\%$ wooded $($good condition$),5\%$ good condition meadow, $30\%$ cultivated land with conservation treatment, $30\%$ residential with an average lot size of $\frac{1}{8}$ acre, and $25\%$ commercial area. The area has $40\%$ soil type A and $60\%$ soil type C$.$

Using the SCS method of unit hydrograph construction and Excel to aid in your calculations and graphing, plot the resulting triangular hydrographs on the same graph for comparison and note the differences in a few short sentences. How does development affect the hydrograph? What do the resulting hydrographs tell you about the effects of high or low curve numbers?