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<br />CONVERSION FACTORS, ABBREVIATIONS, AND VERTICAL DATUM <br /> <br />cubic foot per second (ft3/s) <br /> <br />0.02832 <br /> <br />To obtain <br />millimeter <br />meter <br />kilometer <br />square kilometer <br />meter per kilometer <br />kilometer per square <br />kilometer <br />cubic meter per second <br /> <br />Multiply <br /> <br /> <br />inch (in.) <br /> <br /> <br />foot (ft) <br /> <br /> <br />mile(mi) <br /> <br /> <br />square mile (mi2) <br /> <br /> <br />foot per mile (ftlmi) <br /> <br /> <br />mile per square mile (milmi2) <br /> <br />By <br />25.4 <br />0.3048 <br />1. 609 <br />2.590 <br />0.1894 <br />0.621 <br /> <br />Sea level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929-- <br />a geodetic datum derived from a general adjustment of the first-order level nets of the United States <br />and Canada, formerly called Sea Level Datum of 1929. <br /> <br />vi ESTIMATING DESIGN.FLOOD DISCHARGES FOR STREAMS IN IOWA <br />