This study aims to replicate the pluvial floods that occurred in Badin and Mirpurkhas districts of Sindh, Pakistan, in 2011. It utilizes advanced hydrodynamic modeling techniques, incorporating high-resolution gridded rainfall data from the Global Precipitation Measurement (GPM) satellite and the Direct Rainfall Method within a 2D HEC-RAS model. The research reconstructs the spatial and temporal precipitation patterns during the 2011 floods and models rainfall-runoff processes at a fine spatial scale using Direct Rainfall Method within a 2D HEC-RAS. The objective is to gain insights into the specific factors that contributed to the severity and extent of these pluvial flood events, considering local topography, land use changes, and rainfall patterns unique to the districts. The findings will inform targeted flood risk assessments and mitigation strategies for these vulnerable areas. Additionally, the study contributes to the advancement of hydrodynamic modeling techniques, demonstrating the effectiveness of integrating GPM rainfall data and the Direct Rainfall Method within a 2D HEC-RAS model framework for pluvial flood replication and analysis. Ultimately, the research aims to improve our ability to predict, prepare for, and respond to pluvial flood events in the region, with the goal of reducing their impact on communities and ecosystems in the context of a changing climate.
