Question

*JJ 19-3 Try your hand at modeling runoff in a very simple way. Runoff (Q) is the volumetric flow resulting from what is called "excess precipitation" (precipitation minus abstractions). For this problem, the only abstraction is infiltration. Calculate runoff in m/h assuming a 1.0-hectare area (10,000 m2) divided into half permeable and half impermeable (no infiltration) areas. For the permeable area, use the following Horton parameters: fo-2.0 cm/hr, f-0.3 cm/h, k-2.5 h'. Apply a constant 0.4 cm/h rainfall. If the rainfall is smaller than the infiltration, there is no runoff. Calculate the individual and total flows for 30-minute intervals for 6 hours. Graph your results and show hand calculations for t 1.5 h. [check: t-2, Qo-3.7 m2/h, Qimp-20 m'/h; t-6, Qotal 25 m/h.J

Answer 1