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<br />e <br /> <br />e <br /> <br />e <br /> <br />(3) Th" 11" ot 19 .tOl'lU VU reter1'll4 to the ~teo- <br />ro1oalcal S~ction ot the Weather Bul-eau tor All opinion reglU'dlllg traAapoe1- <br />bHit)' and for an estimate ot adjust_at required. Two tranapoa1t10ne ot <br />the 5,000 Iq. mi. center area ot each .tom Yere cone1dered, one tralUpoe1- <br />tieD beiJJg made to the lover Cumberland basu (center at Clarkaville, Tezm.) <br />and the other to the Upper baein (center at llunl.side, Ky.) The traDllpol1- <br />t10n ad,.Ju.t.llIl!J1t tacton t'undsbed by the Weather Bureau are listed in tbe <br />5th and 6th colUllll1s ot Table A, Plate 15. <br /> <br />(4) In order to tacH1tate a comparison ot the relat1ve <br />l:lAgnitudes ot rs1n1'all 'luaDt1Ues thet lllight be expected over varioua .be <br />areas and in selected periods ot time, the tabulation ahO\l!l in Table A, <br />Plate 15, vas cOlllpleted by IIlUltip1yi%1g the ra1ntall value. obsel'V'ed in the <br />respective stoma by the averege ot the Clarluvi1le and llun:uiide traupol1- <br />t10n tactors. <br /> <br />( 5) Inasmuch &B rainfall values list~d in Tabl~ A ot Plate <br />15 represent average depths vitbin 1sohyets that diUer trom th~ shape ot <br />"the C=berland _t~rshed, adjustment tor such diUerellCes 1s necessary to <br />detenoillle the quantity ot rainfall thet would tall on tbe vatershed during <br />the transposed storm. To JII1n1m1ze york, ''basin shape" tactors \/ere c01llp\1ted. <br />only tor the seven IIIOst 1mportant stonDS, as listed in Table I ot Plat~ 15. <br />The bas1ll shape tactor tor each storm vas determined by super1.mposing the <br />bas1ll out11lle over the total-storm hohyetal map prepared in the Part II <br />Storm Study, plan1.metering to determine tbe average depth ot ra1nfall vitbJA <br />the bas:Ul outline, and dividing tbis value by tbe average rs1n1'all depth <br />for a corresponding a1ze area as read t1'Olll the JlllI,x1Illlllll depth-area-curve tor <br />the storm. Results are listed in the 5th, 6th, and 7th colUllll1s ot Table B, <br />plate 15. <br /> <br />(6) Depth-area-durat10n data tor the seven most 1mport4Dt <br />storms iDcluded in the study, including adjustments tor transposition and <br />basin shape, are tabulated in Table I, Plate 15. Follov1ng a genereJ. COlll- <br />parison ot dat~ shovn on Table I, consideration ot seasol1ll.l characterist1cs <br />ot floods 1n the basin alld the probable etfects ot reservoir operations on <br />the regu1atlon of runoff, tl,e tran~posed and adjusted storm ot 23-27 ~h <br />1913 (OR 1-15) vaa selected a~ the 120 11\11U' SPS tor the CulllberlaDd b..in <br />above Old Hickory, Tenn. <br /> <br />(7) Average ra1lltall 84d rainfall-excess quant1t1es tor 7 <br />aub-di visiOns of the d,ra1.c.age area 'oIere c01llp\1ted by 6-hour t1llle intervaJ.s <br />dur1.llg the 12O-hour SPS, as "xplailled in paragraph 3-02 ~. <br /> <br />(8) Criteria tor &he preparation ot the SPF Series tor tile <br />draUlage area abow Old Hickory, Tem1., vere e.tabl.1ll1ad in the _r <br />explailled in paragraph 3-02 ~. <br /> <br />Footnote: <br /> <br />?enl1es1ble .vtatloD ot ieoh~tal pattern was aSllUllled as 20 degreel, <br />but vas lees in the seven storms l1sted 111 Table I ot Plate 15. <br /> <br />1, <br />