LESSON 2
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Known information: Location--Giessen, Germany
Surface composition and cover:
GMd soil with average turf
39.7 acres
Compacted gravel
0.9 acres
Solution:
STEPS 1, 2, and 3. Given
STEP 4. Simple or complex?
STEP 4. Classify the basin... (page 2-9)
STEPS 5, 6, and 7. Given
STEP 8. Average slope for basin or subarea 2.9 percent.
STEP 8. Determine the average ... (page 2-12)
STEP 9. Determine "C" for the basin. "C" = .35
Table 2-1 (page 2-6)
STEP 10. Determine the time of concentration.
Figure 2-2 (page 2-7) and Table 2-2 (page 2-8)
NOTE: Path 2A starts at elevation 102 feet because the basin is irregular.
EN5465
2-26
Previous Page
