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<br />economic damages. The concept of the flood plain and degree of flood <br /> <br /> <br />risk is illustrated by the sketch in Figure 1. Following is a list of <br /> <br /> <br />definitions of other technical terms used in this report. <br /> <br />. <br /> <br />C.f.s. (cubic feet per second). A measure of the volume of water passing <br /> <br /> <br />a specified section of the channel and/or floodway per unit of time. <br /> <br />. <br /> <br />Flood Frequency. (See Probability.) The average recurrence interval of <br /> <br />specific discharges or water stages which cause flooding. <br /> <br />Flood Proofing. A combination of structural changes and adjustments to <br /> <br />properties subject to flooding, primarily for the reduction or elimination <br /> <br />of flood damages. <br /> <br />- <br /> <br />Maximum Probable Flood. A potential flood with the highest discharges <br /> <br /> <br />and runoff volume to be expected from the most critical combination of <br /> <br /> <br />meteorologic and hydrologic conditions reasonably capable of occurrence <br /> <br />in the region. <br /> <br />;' <br /> <br />Probability. The annual chance of occurrence of specific hydrologic <br /> <br />events, such as rainfall over a specified area or peak discharge at a <br /> <br />specified location expressed in percent, e.g., 51 representing one chance <br /> <br />in 20 of the event occurring in any year or an average recurrence of once <br /> <br />in twenty years. <br /> <br />Standard Project Flood. A hypothetical flood, estimated by the Corps of <br /> <br /> <br />Engineers, representing the critical runoff volume and peak discharge <br /> <br /> <br />which may be expected from the most severe combiaation of meteorologic <br /> <br /> <br />and hydrologic conditions considered to be reasonably characteristic of <br /> <br />2 <br />