Which of the following is an example of a non-structural flood protection measure?

Non-structural flood protection measures focus on policies, regulations, and initiatives that reduce flood risks without the use of physical barriers or structures. Regulations to prohibit development in high-hazard areas exemplify this approach because they aim to manage land use and minimize exposure to flood risks by discouraging construction in flood-prone locations. This type of measure is integral to effective floodplain management, as it helps to prevent future damages and reduces the need for potential emergency responses.

In contrast, the other options involve structural approaches that physically alter the environment to manage floodwaters. For instance, building levees, flood walls, and flood reservoirs are all examples of structural measures that involve constructing physical barriers or containment systems to control or redirect floodwaters. While these can be effective in certain scenarios, they do not fall under the non-structural category as they involve the development of physical infrastructure to mitigate flooding.