matlab code

4. Biological Oxygen Demand (BOD) is a measure of the relative oxygen depletion effect of a waste contaminant and is widely used assess the amount of pollution in a water source. The BOD in the effluent (Le in mg/L) of a rock filter without recirculation is given by: Lo 12.5D73) Where Lo is influent BOD (mg/L), D is the depth of the filter (m), and Q is the hydraulic flow rate (L/(m2 day)). Assuming Q 300 L/(m2-day) plot the effluent BOD as a function of the depth of the filter ( 100 a) D 2000m) for Lo-5, 10, 20 mg/L