2025 12 19 Stormwater Report Rev 1

FIGURE 10-B: RAINFALL INTENSITY-DURATION FREQUENCY CURVE - NORTHERN REGION DURATION OF STORM IN MINUTES 10 15 20 30 40 5060 120 180 19.0 | 8.0 |! 7.0 + 6.0=> 50S [,, | ISS 5 4.0 “™~ SS < = ‘a ae SASS : P ~ RS, 5 SS RS N F3 ARS Re : v NISSN %, |o N <A a SANS e INS 3 1.0 a SZ 0.9 0.8 ® 0.7 0.6 0.5 0.4 PARED QW: coal svat 7 le poss arias ih ob 2005 ILYEAR AND 15-YEAR oe ee | | 10 15 20 30 40 5060 120 180 DURATION OF STORM IN MINUTES