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 Coastal A Zones: Areas are subject to moderate wave action, with wave <br />heights ranging from 1.5ft to 3ft, necessitating specific building codes and <br />floodplain management practices. <br />o Importance of vegetative cover in slowing floodwaters: <br /> Through absorption and retaining water, it reduces surface runoff during <br />floods. <br /> Deep-rooted plants stabilize soil and sediment, preventing erosion and <br />maintaining the integrity of the floodplain. <br /> The presence of vegetation increases surface friction, which slows down <br />the velocity of floodwaters and dissipates their energy <br />o Impact of development on flood patterns and damage: <br /> An increase in impermeable surfaces can accelerate floodwaters, leading <br />to higher velocities and increased damage during storm events <br /> Dense development in coastal areas can channelize floodwaters, <br />redirecting them in ways that exacerbate flooding and damage to nearby <br />properties. <br /> Restoring natural floodplain functions, such as elevating structures and <br />allowing for the lateral movement of floodwaters, can mitigate storm <br />damage and enhance resilience against future flooding. <br />o Flood Damage Examples: <br /> Showcased damage in densely developed areas. <br /> Highlighted the immense power of floodwaters. <br /> Demonstrated floodwater impact on structures. <br /> Showed how floodwaters can more heavy objects and cause structural <br />damage. <br />o Vulnerability of Ground-Level Structures: <br /> Floodwater can redirect around ground-level structures. <br /> Increased velocity and volume of water on adjacent properties. <br /> Effective floodplain management can mitigate adverse effects. <br /> Elevating buildings on pilings can protect structures and surrounding <br />areas. <br />o Obstructions and Natural Flow: <br /> Solid structures and fences can obstruct natural water flow. <br /> Channelized floodwaters intensify velocity and volume onto neighboring <br />properties. <br /> Design and placement of structures should consider topography and <br />natural flow paths. <br />o Topography and Flood Risk Assessment: <br /> Importance of considering topography in flood risk assessment <br /> Scenarios presented on critical thinking about floodplain function <br />o Discussed various project scenarios in different flood zones: <br /> Different flood zones have unique characteristics that affect water flows <br />and impact surrounding areas. <br /> Project scenarios must consider the topography and existing conditions to <br />determine how proposed developments will alter floodwater movement. <br />2 <br /> <br /> <br />