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<br />Time of Concentration (T c) or Travel Time (T,) <br /> <br />Project: CWCB - Elbert Hydrology By: AJM I Date: 5/30/2007 I <br />Location: Elbert County, CO Checked: I Date: I <br />Basin: Hay Gulch <br />Condition: <br /> <br />Sheet Flow (Applicable to Tc only) <br /> <br /> Segment ID BC <br />1. Surface description Unpaved <br />2. Manning's n 0.24 <br />3. Flow length, L (total < 300 ft) fl 300 <br />4. Two-year 24-hour rainfall, P2 in 2.05 <br />5. Land slope, s ftlfl 0.067 <br />6. Tt hr 0.44 <br /> <br />Shallow Concentrated Flow <br /> <br /> Segment ID CD <br />7. Surface Description (paved or unpaved) Unpaved <br />8. Flow length, L fl 4540 <br />9. Watercourse slope, s ftlfl 0.011 <br />10. Kv 15 <br />11. Tt hr 0.80 <br /> <br />Channel Flow <br /> <br /> Segment ID CD <br />17. Velocity, V ftls 9.76 <br />18. Flow length, L fl 33169 <br />19. Tt hr 0.94 <br /> <br />20. Watershed or subarea To or Tt (add Tt in steps 6. 11. and 19) <br />21. Lag Time <br /> <br />hr~ <br />min~ <br />