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<br />Draft ARR Book VI <br /> <br /> <br />. Chapter 2 of ARR87 <br />. Volume 2 of ARR87 <br />o Can extrapolate to longer durations <br />o New areal reduction factors: <br />..,~ouration <br />.......1 <br />-~~ <br />.- <br />" <br />1 10000 <br />c._..... <br /> <br /> <br />" <br /> <br /> <br />. Already have new values for Vie <br />. wm have new values for NSW, aid and Tas <br />. Vie values are 5% to 10".4 lower than ARRB7 <br /> <br /> <br />.- <br />e ul <br />.. <br />C 0.15 <br />. <br />.. <br />. .. <br />. <br />~ <br />: us <br /> <br />" <br /> <br />~ <br /> <br />,~ <br /> <br />An:a(kmi <br /> <br /> <br />o Obtained from regional extrapolation of <br />observed rainfalls <br />o Generally pool observed data from <br />wide region to "trade space for time" <br />o A number of methods available for <br />doing this <br />o Practitioners use results prepared by <br />others, not done for individual studies <br />o CRC-FORGE approach adopted in Vic, <br />NSW, Qld, and Tas <br /> <br />" <br /> <br />Rory Nathan, Sinclair Knight Merz <br /> <br />8/9/98 <br /> <br />" <br /> <br /> <br />o Chapter 2 of ARR87 <br />o Volume 2 of ARR87 <br />o Can extrapolate to longer durations <br />o New areal reduction factors: <br /> <br /> <br />. ..,~AEP <br />... <br />-- <br />-, <br /> <br />" <br /> <br />,,".. <br /> <br />C.lctNntntA... <br /> <br />" <br /> <br /> <br />Flood <br />Peak <br /> <br />~ ,.. <br /> <br />- <br /> <br />... <br /> <br />10' 101' Ill' <br /> <br />Annual Exceedancl!" Probabilily (1 inY) <br /> <br />, <br /> <br /> <br />El~~~iSll\li'1.tilllillf'o'" <br />. ..7011 <br />mf! m ~~Il!20" <br />rat.'lfa:;lhtata . tje&lII3DQ1 and <br />st.ihdl:fMMe H.08I04) <br /> <br />. <br />-..'\. <br />.,. :.. ... <br />.'. ,. .G...,. ~ <br />. . . ... <br />. . ..... .. <br />.0. . t.~:........c <br />"I: .... ....E...,... . <br />. ....8 <br />. . . <br /> <br /> <br /> <br />o IOOkm <br />~ <br /> <br />" <br /> <br />4 <br />