Using the table below, write down the intensity-duration-frequency equation (IDF) using the Gumbels method.

return period (years) intensity (mm/hr) ve L 10 L rainfall duration (minutes) 0-5 10 20 30 60 120 240 5 10 20 30 60 120 240 5 10 20 30 60 120 240 195 140 113 82 47 26 26 195 158 130 93 53 30 30 229 164 135 97 55 20 31 31 10 20 30 60 120 240 181 151 108 61 34 34 278 198 167 118 67 38 38 100 10 20 30 60 120 240 L | return period (years) intensity (mm/hr) ve L 10 L rainfall duration (minutes) 0-5 10 20 30 60 120 240 5 10 20 30 60 120 240 5 10 20 30 60 120 240 195 140 113 82 47 26 26 195 158 130 93 53 30 30 229 164 135 97 55 20 31 31 10 20 30 60 120 240 181 151 108 61 34 34 278 198 167 118 67 38 38 100 10 20 30 60 120 240 L |