5. Use the Rational Method to estimate the peak discharge for the various combinations of storm and basin characteristics given in Table 5. (8 marks)

 

TABLE 5: Estimated peak discharges for combinations of basin and storm characteristics

Basin Area	Land Use and Soil	Storm Intensity
		0.75 mm/hr	1.4 mm/hr
0.45 km2	Cultivated, sandy soil
0.45 km2	Pasture, sandy soil
0.45 km2	Pasture, clay soil
0.45 km2	Cultivated, clay soil

6a. Referring to question 5, what effect does soil type have on discharge? Explain. (2 marks)

6b. What effect does cultivation have on discharge? Explain. (3 marks)