Evaluate the theoretical considerations involved in designing and constructing resilient coastal infrastructure in the face of rising sea levels and increased storm intensity. Discuss the principles of coastal engineering, including the use of seawalls, breakwaters, and beach nourishment, to protect coastal communities from erosion and flooding. Consider the potential environmental and social impacts of these engineering interventions, as well as the challenges of balancing short$-$term protection with long$-$term sustainability. Additionally, explore innovative approaches to coastal resilience, such as living shorelines and nature$-$based solutions.