RESILIENT SETTLEMENTS AMID CYCLONIC STORM – EMPIRICAL EVIDENCE ON FACTORS AT PLAY FROM SOUTHWEST COASTAL BANGLADESH Sumaiyah Binte Mamun 1 , Khandaker Shabbir Ahmed 2 1. Department of Architecture, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh 2. Department of Architecture, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh 1 Abstract Bangladesh is vulnerable for tropical cyclone due to geographical position, wide and shallow continental shelf and the funnelling shape of the coasts. With the advancement of cyclone warning systems, shelters, and awareness in people regarding tropical storm reduced loss of life, but the amount of property has risen quite significantly. But recorded evidence shows that Ghorkumarpur, a small coastal village at Shamnagar Upazila has surprisingly survived the strong thrust of cyclonic wind not only during Sidr, Aila and Amphan but also at previous storms with its thatched houses, whereas neighbouring villages were washed away. The dynamics of cyclonic wind gust and obstacle aerodynamics at roughness layer has a correlation with wind pressure within settlement form. The gust of wind speed, threshold of comfort, discomfort and danger at settlement level depends on settlement porosity factor at interfacial layer. Settlement form and features plays a vital role to decrease or increase frictional force within boundary layer which determines destruction or minimization of the damage and discomfort caused by cyclonic wind. Observation from filed survey and in-situ measurements at Ghorkumarpur village indicates several physical parameters of the village land use morphology has helped the survived settlement to act like a bluff body during cyclonic storm and minimized the damage from cyclonic wind by increasing frictional force within the settlement boundary layer. Literature