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City of La Porte <br />Intensity vs. Time of Concentration vs. Rainfall Frequency <br />(IDF Curves) <br />Source., Hydra 35/TP-40 <br />100 1 <br />i <br />i <br />L <br />V <br />0 - <br />C <br />100-year <br />` !f <br />_-25-year <br />_10-year <br />- 5-year <br />3-year <br />ji \ 2-Year <br />1 <br />1 10 10o <br />Time of Concentration, TC (minutes) <br />I17 tr'C) 5lty, l = <br />(d +TC)e <br />Rainfall Frequency <br />b <br />d <br />e <br />2-year <br />75-01 <br />16.2 <br />0.8315 <br />3-year <br />77.27 <br />17.1 <br />0.8075 <br />5-year <br />84.14 <br />17.8 <br />0.7881 <br />10-year <br />93.53 <br />18.9 <br />0.7742 <br />25-year <br />115.9 <br />21.2 <br />0.7808 <br />100-year <br />125.4 <br />21,8 <br />0,7500 <br />