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<br />FIGURES <br /> <br />I. Map showing location of metropolitan areas included in the nationwide <br />urban flood-frequency study 6 <br />2. Schematic of typical drainage basin shapes and subdivision into thirds 7 <br />3-28. Graphs showing: <br />3. Comparison of observed 2-year urban peak discharge to peak <br />discharge estimated from equation 3 11 <br />4. Comparison of observed IO-year urban peak discharge to peak <br />discharge estimated from equation 5 12 <br />5. Comparison of observed loo-year urban peak discharge to peak <br />discharge estimated from equation 8 13 <br />6. Comparison of observed 2-year urban peak discharge to peak <br />discharge estimated from equation 10 14 <br />7. Comparison of observed IO-year urban peak discharge to peak <br />discharge estimated from equation 12 15 <br />8. Comparison of observed loo-year urban peak discharge to peak <br />discharge estimated ftom equation IS 16 <br />9. Comparison of observed 2-year urban peak discharge to peak <br />discharge estimated from equation 17 17 <br />10. Comparison of observed IO-year urban peak discharge to peak <br />discharge estimated from equation 19 18 <br />II. Comparison of observed loo-year urban peak discharge to peak <br />discharge estimated from equation 22 19 <br />12. Comparison of equivalent 2-year rural peak discharge to peak <br />discharge estimated from equation 24 20 <br />13. Comparison of equivalent IO-year rural peak discharge to peak <br />discharge estimated from equation 25 11 <br />14. Comparison of equivalent loo-year rural peak discharge to peak <br />discharge estimated from equation 26 22 <br />IS. Relation of urban/rural 2-year peak-flow ratio (uQ2/RQ2) to <br />basin development factor and impervious area 23 <br />16. Relation of urban/rurallO-year peak-flow ratio (uQIO/RQIO) to <br />basin development factor and impervious area 24 <br />17. Relation of urban/rurallOO-year peak-flow ratio (uQloo/RQloo) <br />to basin development factor and impervious area 25 <br />18. Comparison of urban/rural 2-year peak-flow ratio (uQ2/RQ2) <br />to Leopold (1968) curves 26 <br />19. Relation of full-development urban/rural ratio (UQ2/RQ2) to <br />drainage area size 27 <br />20. Relation of full-development urban/rural ratio (UQ2/RQ2) to <br />channel slope 28 <br />21. Relation of full-development urban/rural ratio (uQ2/RQ2) to <br />rainfall intensity 29 <br />22. Relation of full-development urban/rural ratio (uQ2/RQ2) to <br />storage 30 <br />23. Relation of full-development urban/rural ratio (uQ2/RQ2) to <br />equivalent rural discharge 31 <br />24. Average relations of urban/rural ratios to basin development <br />factor for 2-year and loo-year floods 31 <br />25. Comparison of estimated 2-year urban peak discharge to 2-year <br />equivalent rural peak discharge 32 <br />26. Comparison of estimated IO-year urban peak discharge to <br />IO-year equivalent rural peak discharge 33 <br />27. Comparison of estimated lOO-year urban peak discharge to <br />loo-year equivalent rural peak discharge 34 <br /> <br />" <br />, <br />, <br /> <br />IV Contents <br />