SedSpec Peak Runoff Rate Estimation

10 Points

Due September 15

The peak rate of runoff is often of interest when designing erosion control measures and various other water structures dealing with flooding issues. Use the SedSpec tool’s rational method option to estimate the peak rate of runoff for the following conditions. The area of the small watershed of interest is 58 acres. All soils are group C soils in the watershed. Ten acres of the watershed are forest. 12 acres are pasture, and the remaining area is cultivated land (corn). The watershed is located in Clinton County, Indiana. The maximum length of the watershed is 1700 feet and the average slope is 1.25 percent. Use the Midwest Climate Center rainfall data option. Report the peak rate of runoff for 1, 10 and 100 year events. Briefly discuss the magnitude of the changes in peak runoff for the 3 rainfall events. Is this what you expected (including why or why not)? The peak runoff rates for these events and the short discussion can be written below and turned in.