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786 33 !lll::l- 1I-::TÏÏ-i:Î:: cltcElExl lRBl, sQ fl = tOlO rrP nBFEREtrcE : s1?7:331130 ¡trlBB¡ oP lllûll. PEIRS = 24 PERIOD OP R¡c. = 195'80 tEA¡ P¡Àf fSÀB PEÀT tEÀR PETK IETR PBIÍ 1955 2rl 1957 175 1959 111 1960 216 1961 156 1962 169 1963 201 1964 90.6 1965 201 t965 81 1967 156 1968 395 1969 r78 19t0 170 1911 200 1912 263 1973 1l¡5 1974 136 19?5 195 1916 2\2 1977 318 1978 505 1919 287 1980 434 rr¡l = 223.0 sTD. DEv. = 103.0 coEF' ot sfEl = t'326 lolBs ¡ I. Tf,E 1978 T¡D'1980 PB¡TS CEIE TÀÍET ¡S lNE TUO LÀRGISÍ III lEE PE¡IOD 1895.1980. srrr 78803 :I:3ï-::::I-"-ilÏ1I cttcErtrl tElr' sQ rl 27.4 ËÀP 8E?BR!¡cr s176:192268 llttDE¡ or rflÛrl. PE¡[s = 10 PER¡oD o! REc. = 1970-79 rllr Pltf tE¡B pBl[ IEIB PSTÍ IEI! PEÀT 1970 3.16 1971 9.51 '1972 13.41 1973 l.?3 19?¡ 1.55 1975 2.74 t9?6 3.60 1977 5. 1? 197ø 1.82 1919 9.40 ;Elr = 5.ll STD. DEV. = tl.O2 COE!. o! srEÍ = 1.170 ¡PtEttt lT D0¡RoBlll IEIR PEÀI( IEIR PB¡K rElB PEIÍ ftlB Dltt 1930 1037 1931 1832 1932 1210 1933 t588 1934 1 106 1935 15rt0 193ó 1716 1937 llrt 1 938 952 1939 1080 1940 1293 19t1 17t2 1942 1889 t9¡t3 19rt3 t944 9¡r8 19t5 t93¡ 't9q6 2265 19q7 1 160 1948 3227 19¡9 2l7t 1950 2867 l95t 975 1952 t¡459 t953 t5ó0 1954 1261 1955 1700 1956 960 1957 :¡11ó t958 2022 1959 1255 't960 1 458 t961 1279 1962 2004 1963 A27 196¡ r 163 1963 1936 1966 1337 1967 30lr 196S 1854 1969 325a t970 1512 197 1 1 t5C 1972 1127 1973 1706 1970 791,, 1975 2419 1976 t 104 1971 1169 t9?8 3991 1919 3¡23 ttEltl = 1829 sTD. DEV, = 841.9 coEt. Ol SiE¡ - 1.316 IOl9S: 1. TÍF II'PLOCS TERE DERTgED FÂOË [Àf¿ LEÍIL IID OOT'I.OI BECORDS USrilc r l2-800R rrtE rtrEBVlL. 5ITE 9 I ?O LrÍE FtrEl rttlo¡ CÀTcllllELT à88Àr S0 fl = r38q nlP ¡Elgnzlcr = ùUtlBER 0F l¡il0ll PEIKS = lt8 PEBIoD 0t nEc. . IETE P?TK 193t 187 1935 653 I 93e 606 19q¡ 599 t 947 !rt2 1951 502 t955 619 1959 367 196:t 338 1967 903 1971 325 1915 q6 t fETR 1932 193 6 19¡t0 t 9ll¡ 19C8 1952 t 956 1960 196¡r 1968 1912 197 C PB¡K 593 503 599 332 845 157 371 561¡ 453 ¡r08 552 365 IE¡ R 1 933 19 3? l94t 1945 1949 't9 53 1937 19 61 1 965 1959 1 973 1917 l93l-78 PEtß rBtt p;lf 539 193¡t 717 l¡23 1936 60¡ 585 l9e2 62t 540 19¡ó 926 665 1950 7¡¡ 605 195¡ 373 700 1958 556 $15 1962 839 ø23 t966 631 1 r 36 1970 650 cl?CElBIÎ rlsr, SQ Ír 215 llP rErrBBtc! s159:119827 rulBlB O? I¡IU¡L Ptrfs = t8 PEEIoD ol ¡Ec. = 1963-80 162 197¡t {36 rB¡¡ PEIÍ IET¡ PEIf, IEIB PETf, tEtn Pllf t23 19?8 ltl¡ 1963 15.2 1964 1îs 1965 t43 1966 81 1967 l7q 1968 131 1969 6 t. 6 t 970 10.2 ËEtù = 596.5 srD. DEv. = 197.5 coEP. oF sßP9 ' 0.7392 1 971 6 1, 6 1972 8l¡.5 1973 11 1970 68 t975 135 1976 t03 1977 169 rs76 53q ¡OTES : 19?9 119 1980 196 T. TflE IIPLOflS 3ENE DERIYED FßOI LTßE LEVFL IID OTîILO¡ NECORDS USTf,G À 12-HO¡IR 1I'IE IIITESYTL. rEtI = 126.5 STD. DEt' = 113.7 CO!F. oP SKEI = 2.895 fotlS ! srlE 957C LÀr(E îE t¡lt lltlot 1. tEE '1978 PttÍ CÀS Ttf,E[ tS tllE LlnCEsr rx rtlE PEFToD 1914-1980. CtrCtËEf,T tREl, SO K¡ 3124 ülP BEFEREICE = l¡UliBEF OP ¡[iÛll PEÀxs = 5q PERIOD OP REc. = 1926-19 NEW SOUTH ISLAND WEST COAST YEÀR PEIK PEÀK PEÀf, YEIR P'Tf 1926 1q20 'EÀF 1921 1737 'EAR 1928 20 r6 1929 1500 srlB 9 1 l0 Llt(E fltrlllP0 IftloS 1930 1500 1931 1285 1932 2511 1933 2604 193ft 2365 1935 1609 1936 2608 193? 1¡20 1938 l8lq 1939 260'Ì 1940 3499 194'1 2294 cÀTCBllFxT ÀREt' sQ KË = 3133 llÀP REPERE¡CE = 1942 1362 l9rrl 1935 194r¡ 20 rB 1905 2540 NUiBER OF ¡xNUlL PEÀKS = 53 PEBIoD oF FEC' ' 1946 3C6l 'l9tt1 221 '' t9rr8 3¡a59 19¡9 1948 1927-79 1950 2167 1951 2671 1952 lt4r¡ 1953 2865 YEIR PEIK Y¡ÃF PEÀ¡( TDIR PETR f!I¡'B PEIT 195¡1 2942 1955 2C6C 1956 210U 1957 3512 1927 1¡¡9t 192A 1855 1929 1?9lr 1930 r 958 31105 1959 2¡t88 1960 2818 1961 1937 75¡ 1931 1250 1932 929 t962 tB80 1963 1166 1 1933 792 193¡ l26t 964 1723 1965 227e 1935 199 1936 736 1937 648 1938 r061 1966 l6rrl 1967 3715 1968 2381 1969 2552 1919 512 1940 1q90 19¡.1 1635 1942 1970 226A 1971 2202 1912 2220 r9?3 1495 10tt6 1943 939 1944 669 1974 19¡¡4 lq15 2426 19?6 20 19 1945 1332 t9¡6 2799 191't 2009 1907 1288 l9q8 2118 1949 1866 1950 1463 1978 4839 19fs 4r¡38 1 95f 1 094 1952 26qA 1953 11r¡5 19511 10?3 1955 1C26 1956 759 19 57 2933 1958 20r5 ËElN = 2561.8 sÎD. DFv' = ?68. O COEF. OP sKE¡ = 0.9820 1959 890 1960 1181 t961 1700 1962 It98 1961 585 1964 t057 '1965 963 1966 t t¡2 l¡0TEs: 1961 2CUi 1968 1869 1969 2254 1970 88r I. T8E INFI,O9S TE¡T DERI9ED ¡ROII LIÍE LPVgL AIID OOTPLOT r9?1 780 1912 1\29 1973 812 197¡ loTt RECOFDS ÛSIIIG À 12-IIOUR TIIIE I¡lERVAL. 1975 2006 1916 1 138 1917 1 469 l97S 2¡60 1979 26J2 ;Eltl = 1382 sTD. DEY. = 609.2 coBP. oF s(E¡ = 0.88{9 sIrD 75276 saofoÍE8 tT BosElrs ÞErl l¡oTEs - I i. rue rt¡Lots IBRE DERTSED FRoË LÀiE rtYEL ¡lD ooTrlo¡ C¡lCErErT tREf,' SQ ß; = lC88 irp ¡EPlBEfcE = s132:589786 RECOBDS OSII¡G T 12-HOUR TIIE IXIENYTL. TUTBER O! llf,tttl, PEIIS = 12 PERIOD oF REC. = 1968-?9 IETB PEÀK IEIB PETK IETR PETI tEÀR PEÀÍ 639 srtB 9150 LltrE Clllfl I¡FLOI 1968 l¡51 1969 1970 369 191 1 328 1972 00r¡ 1973 277 197¡a 528 1915 56c 1976 r¡? 1 1911 508 1978 c18 1979 tt81 cllcflüE¡Î ÀnEl, S0 Kll I'IP RE?EREf,CE = PERIOD OP REC. = 167.5 COEP. O? SKEi = l.l¡06 IOIBER O! I¡IIUÀL = 2624 PEIÍS =50 r93O-?9 rEl¡ = 4C5.C SrD. DEY. r Water & soil technical publication no. 20 (1982) 125
F.3 Analysis and results tatively placed with Region on the basis the hydrograph for to the Taieri River Paerau and Loganburn at Paerau (Figure F. l0) Southland rivers (Figure F.9). - than the (see section 3.1.6). Plots with similar shape were overlaid to form combined plots. Flood frequency data thus plotted were found to lie in three groups: (a) peak lake inflows and Shotover floods; (b) Southland floods and the pomahaka floods; (c) East Otago floods. Group (a) closely resembled the South Island West Coast data Canterbury data (see these two groups were I plots of the data they Support for the differentiation of the lake inflows and Shotover from the other sites studied is also given by the hydrographs (Figure F.8). These show that floods are frequent and occur at the same time for each catchment. Since the floods result from the same storms, it is an argument for each catchment having a similar shape in its flo;d frequency curve and for grouping them together. Also shown in Figure F.8 is the hydrograph for Cieddau at Milford. Finally, - the hydrographs (Figures F.8, F.9 F.lO) show that the majority of large floods in the decade l97l-19g0 o-ccurred in the years 1978-1980. Figures for F.g, F.9, F.l0 also show the wide extent of the October l97g flood which was the largest of the decade for many of the records. F.4 Gonclusion and the Manuherikia at Ophir (1971-1980) wirh rhe regional clrves (Figure F.7) shows the difficulty in determining which curve is appropriate. Central Otágo is ten_ graphs (Figures F.8, F.9, F.l0) because the frequency of minor ach region but not across region ïable F.3 Co-ordinates fiom regional frequency curves. O2.33/O o5/o olo/o ozdo o5o/o orodo ozoo/o S.l. West Coast 1.OO 1.24 1.45 1.64 1.89 2.O8 2.27 Southland 1.03 1.46 1.82 2.16 2.61 2.94 3.27 sth Canterbury- Otago 0.97 1.51 1.99 2.48 3.17 3.73 4.33 Acknowledgements D. McMillan in compiling the Miss K. Vollebregt in anatysing owledged. References Fitzharris, B.B.; Stewart, D; Harrison, W. l9g0: Contribution of snowmelt to the October l97g flood of the Pomahaka and Fraser Rivers, Otago. Journal o! Hydrologlt (NZ) I9(2): 84-93. Gilbert, D.J. 1978: Calculating lake inflow. Journal o! Hydrologlt (NZ) I 7(I): 3943. Ministry of Works: Hydrology Annual. (No. 3, 1955 ... No. 17, 1969). Ministry of Works, Wellington. t2Á Water & soil technical publication no. 20 (1982)
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WATER & SOIL TECHNICAL PUBLICATION
Page 3 and 4:
Regional flood est¡mat¡on in New
Page 5 and 6:
Tables 1.1 Risk ofexceedence for sp
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Preface Water & soil technical publ
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annual flood Q (the mean of the ann
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Water & soil technical publication
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Doto ovoiloble on TIDEDA Figure 2'1
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P=45 O= 15 x4 (l) '= o o t.25 2'.O
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Êv2 ( ko) Reduced Voriote y I'O t1
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turn period. A plotting position fo
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'o ,l\, I zl l- I Water & soil tech
Page 23 and 24:
Table 3.2 Flow stat¡ons used. SITE
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e process of examining the simtrend
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Iì_ t_ I I I I I I I t-. I I tñ I
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Þ I"IEST COFST 0 o I E 6o o o 25 3
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SOUTHEBN REDUCEO Y VRBIßTE NETURN
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SOUTH ISLFND HEST COFST I]ÊTR èo
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SOUTH CÊNTERBURY DRTÊ NEOUCEO Y V
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COMB I NED ,,IE5T CORST DRTR o rt
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BÊY OF PLENTY DRTF o o o NEOUCEO Y
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NOBTH ISLRND ßEGIONÊL CUBVES 1.50
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data for this area are required bef
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NELSON REGIONFL CURVE BEOUCEO Y VRR
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46 EÊSTEFìN NEI,,I ZEFLÊND DÊTI
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Table 3.9 The grouping and the grou
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allowing curves rather than just st
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3.5.5 Extension method The NERC (19
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Table 4.1 South lsland catchment ch
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I 2 t l¡ 5 5 7 I 9 l0 t1 ,12 I5 1{
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decided instead to use estimates of
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\Í l{ I t, ìj( Fþurc 4.4 Distrib
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62 Fþurc 4,6 Logarithmic rcsidual
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Table 4.6 Final equations for South
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I ++ ++ * E 4.6 Analysis of North l
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Non Pumice = õ = 3-24xto'6 AREA'7
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Northlond f C"ro^ondel f Eost Cope
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Table 4.11 Comparable equations for
Page 75 and 76: Poo led cv Pooled o.40 F¡guro 4.12
Page 77 and 78: mates of Cp typically range between
Page 79 and 80: -J æ 'll o Eo !¡ Assemble llood p
Page 81 and 82: Year 1958 1959 1960 l96r t962 1963
Page 83 and 84: The estimate of Q from the regional
Page 85 and 86: Water & soil technical publication
Page 87 and 88: Maguiness, J.A.; Blackwood, P.L.; B
Page 89 and 90: The liequency factor K is a functio
Page 91 and 92: e.9., Linsley et ol. (1915); lrish
Page 93 and 94: Maguiness, J.A.; Blackwood, P.L.; B
Page 95 and 96: sltt 930 t [rûltRÀict ¡ l? s;¡t
Page 97 and 98: 3950't flrlÀRt R tr îlt¡Ît ;tP
Page 99 and 100: S ITI 29202 RuNttiltcl I ¡t tllEtt
Page 101 and 102: ïI-'_____ ::19: lt¡IPt0r n À1 i
Page 103 and 104: 9100r GNE? R ¡T DOBSO| s¡18 93207
Page 105 and 106: 6800 1 sBlrri R tT SrITEC¡,tttS 6I
Page 107 and 108: APPENDIX C Summary of tho data for
Page 109 and 110: oæ ON LAT. STATION NA ATION LAT. N
Page 111 and 112: o NUI,IBER HHAKAIIARU 854801 38 L7'
Page 113 and 114: l9 AT NU¡IB ËR AR',tËtlANA ÂRAI
Page 115 and 116: A ON LAT. STATION NA NUMBER AHUNA 5
Page 117 and 118: â NUI,IBER Lü{G.E ON NU14EER I,IU
Page 119 and 120: æ TATI ¡rouNT sor.tERS 7L740? 43
Page 121 and 122: N) o STATIoN NAr{gmLfï3---ffij NUI
Page 123 and 124: APPENDIX E Compadson of Regional Fl
Page 125: Table F.2 Flood peak data. NEW OTAG
Page 129 and 130: ét êt REOUCEO VßFIHTE 2. 33 5 l0
Page 131 and 132: SOLITH I EA l') COAST soUTH CANTERB
Page 133 and 134: 0tiftflt a itÉitut5 ü¡. il/5 tg?
Page 135: Water & soil technical publication
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