RAINFALL PATTERNS AND ITS IMPACT ON STORM WATER RUNOFF USING WEIBULL DISTRIBUTION METHOD: A CASE STUDY OF DAHISAR, MUMBAI, INDIA.

This research investigates the effects of urbanization on stormwater runoff in Dahisar, Mumbai, India, over the period 2003-2023. NASA POWER data, along with the Weibull distribution method, is employed to assess long-term trends in rainfall and temperature. The study highlights a notable rise in impervious surfaces driven by urban growth, as identified through the Weibull distribution analysis. The peak stormwater discharge is estimated at 1433.44 cubic meters per second, highlighting the growing risk of urban flooding. The findings indicate an annual average rainfall of 1720 mm, which directly influences stormwater dynamics and drainage capacity. The study underscores the pressing need for sustainable urban planning strategies that integrate resilient water management solutions. Green infrastructure, permeable pavements, and improved drainage networks are recommended to mitigate the adverse effects of rapid urbanization on stormwater systems. As Mumbai continues to expand, addressing these hydrological challenges is essential to reduce flood risks and enhance climate resilience. The study provides valuable insights for policymakers, urban planners, and environmental engineers, advocating for adaptive measures to improve urban water management in coastal megacities. [ABSTRACT FROM AUTHOR]