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<br />- <br />L.. <br />.c <br />- <br />c <br />~ <br /> <br />'-:' 1 0 <br />Z. <br />'u; <br />c <br />Q) <br />-- <br />c <br /> <br />City of La Porte <br />~ <br />:.\. <br />l- <br />ii <br /> <br /> <br />Intensity vs. Time of Concentration vs. Rainfall Frequency <br />(IDF Curves) <br /> <br />Source: Hydro 35ffP-40 <br />- . <br /> <br />100 <br /> <br />- <br />--. - <br />---.. -- 100.... - -- <br />=---- -- -- -..... -....... ~ <br /> ~ , r--... ...... ..... <br /> ~ ~ ~ r-.:: r..... f'" ""'" <br /> ..... <br /> ......... - ...... r--... ..... ro-.. <br /> " ;::: ..... ""'" ""'" <br /> r-... r-.. <br /> """ ..... ~ ~ <br /> r-... ~ <br /> <br />5' <br /> <br />/100-year <br /> <br />?5-year <br /> <br />............1 a-year <br /> <br />-5-year <br /> <br />'3-year <br /> <br />'" 2-year <br /> <br />1 <br />1 <br /> <br />10 <br />Time of Concentration, TC (minutes) <br /> <br />100 <br /> <br />In ten sity,i- b <br />(d+ TC)8 <br /> <br />FIGURE 1 <br /> <br />Rainfall Frequency b d e <br />2-year 75.01 16.2 0.8315 <br />3-year 77.27 17.1 0.8075 <br />5-year 84.14 17.8 0.7881 <br />1 a-year 93.53 18.9 0.7742 <br />25-year 115.9 21,2 0.7808 <br />1 aD-year 125.4 21.8 0.7500 <br />