A structure may be built in a floodway only if it can be demonstrated through an engineering analysis, commonly referred to as a “No-Rise” study, that the development will not result in any increase in the flood levels during the occurrence of the base flood. A floodway is defined as the channel of a river, or other watercourse, and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than one foot.