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<br />Table I.~-Examples of surface-water Information used in planning, design, <br />and operation of water-related facilities and activfties--concZuded. <br /> <br />, , P rob I em <br /> <br />Sub-prob lem <br /> <br />Surface-water information needed <br /> <br />Flood <br />control <br /> <br />Levees <br /> <br />Flood-peak-frequency curve; channel <br />cross sections and profiles. <br /> <br />Reservoir design <br /> <br />Flood-volume-frequency relation <br />(storage required-frequency rela- <br />tion); flood-routing coefficients. <br /> <br />Reservoir operation' <br /> <br />Same as flood forecasting, plus peak <br />flow frequency for downstream <br />uncontrolled areas; time of travel <br />of flood wave (or routing <br />coefficients). <br /> <br />Zoning and <br />insurance <br /> <br />Flood profiles; peak-stage frequency <br />curves; velocity of overbank flow. <br /> <br />Highways <br /> <br />B ridge des i gn <br /> <br />Peak-flow frequency; channel cross <br />sections and profiles; stage- <br />discharge relation. <br /> <br />Grade design <br /> <br />Stage frequency and duration. <br /> <br />Municipal Water supply <br />and <br />industrial <br /> <br />Low-flow frequency; storage require- <br />ments, peak-flow frequency; time <br />of travel; synthetic streamflow <br />records. <br /> <br />Recreation Streams <br /> <br />Low-flow frequency; velocity; depth. <br /> <br />Lakes <br /> <br />Peak-flow frequency; seepage; low- <br />flow frequency. <br /> <br />Farm water <br />supply <br /> <br />Design <br /> <br />Peak-flow frequency; low-flow <br />frequency; storage requirements, <br />seepage. <br /> <br />Current-Purpose Streamflow Data <br /> <br />The program goal for this type of data Is to provide the particular <br />information needed at specific sites for current use. This part of the <br />program is not subject to design In advance because demands change fre- <br /> <br />14 <br />