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<br />'C' <br />rE <br />c: <br />c.. <br /> <br />- 10 <br />~ <br />.iii <br />c: <br />Q) <br />- <br />c: <br /> <br />e <br /> <br />. <br /> <br />City of La Porte <br /> <br />. <br /> <br />Intensity vs. Time of Concentration vs. Rainfall Frequency <br />(IDF Curves) <br /> <br />Source: Hydro 35ffP-40 <br />~ .- ..... <br /> <br />,.~{!t' <br /> <br />" <br /> <br />.. - <br /> <br />100 <br /> <br /> --- <br />- ---- ......... <br /> ----- ........... -.. - - <br /> ~........ ........ ........... -.. ... ......... <br /> ~ .....:- ....... ...... ....... <br /> ~ ~ :::::: ..... ~ , ... <br /> .... -- ...... .... <br /> , :::::: ;: ...... .... ... ... <br /> , ...... .... """ ... <br /> ....... .... '... <br /> ...... <br /> <br />~ <br /> <br />1 <br />1 <br /> <br />10 <br />Time of Concentration, TC (minutes) <br /> <br />Intensity,i= b <br />(d+ TC)9 <br /> <br />Rainfall Frequency <br />2-year <br />3-year <br />5-year <br />10-year <br />25-year <br />100-year <br /> <br />b <br />75.01 <br />77.27 <br />84.14 <br />93.53 <br />115.9 <br />125.4 <br /> <br />d <br />16.2 <br />17.1 <br />17.8 <br />18.9 <br />21.2 <br />21.8 <br /> <br />/100-year <br /> <br />/5-year <br />.,......,1 O-year . <br /> <br />-5-year <br /> <br />.............3-year <br /> <br />" 2-year <br /> <br />100 <br /> <br />FIGURE 1 <br /> <br />e <br /> <br />0.8315 <br />0.8075 <br />0.7881 <br />0.7742 <br />0.7808 <br />0.7500 <br />