SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION A37 LUPANE RAINFALL STATION

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1 35000 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION A37 LUPANE RAINFALL STATION ui OBSERVED RUNOFF x looocum Figure 10 1

2 ESTIMATED AND OBSERVED RUNOFF FOR STATION A41 Lupane Rainfall Station Estim ate O b serv ed RUNOFF x looocum oo i n cn a ) co to fs'- QO CD O') O ' - o CN CN co MONTHS FROM OCT 1965=1 Figure 1

3 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION A41 ' ESTIMATED RUNOFF x looocum * OBSERVED RUNOFF x looocum Figure 1

4 ESTIMATED AND OBSERVED RUNG " FOR N A TIO N A28 Lower Gweru Rainfall S L /'o n O b serv ed RUNOFF x looocum O CT> 00 O O t- MONTHS FROM OCT 1958=1 Figure 12

5 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION A ESTIMATED RUNOFF x looccum U OBSERVED RUNOFF x looocum Figure 12

6 45000 ESTIMATED AND OBSERVED RUNOFF FOR STATION A29 Gweru Rainfall Station Estimated O bserved RUNOFF x looocum c o o «- CN MONTHS FROM OCT 1958=1

7 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION A29 25GOOO ESTIMATED RUNOFF * looocum OBSERVED RUNOFF x looocum Figure 13 1

8 ESTIMATED AND OBSERVED RUNOFF FOR STATION A29 SomaDuia Rainfall Station RUN-OFF x looocum m (n O) T- CN CN mm " m---- CD to *N O') N" ID T CO MONTHS FROM OCT 1958=1 Figure '4

9 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUNOFF AT STATION A OBSERVED RUNOFF x looocum

10 12000 ESTIMATED AND OBSERVED RUNOFF FOR STATION AGO Gweru Thornhill Rainfall Station O b serv ed RUNOFF x looocum r- h- (D CO CO r <t> ro o O) o m v- x- c\j MONTHS FROM OCT 1973=1 Figure 15

11 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUNOFF AT STATION AGO Gweru Thornhill Rainfall Station ESTIMATED RUNOFF x looocum * OBSERVED RUNOFF x looocum Figure 15 1

12 ESTIMATED AND OBSERVED RUNOFF FOR STATION AGO Shangani Rail Rainfall Station Estim ated O bserved RUNOFF x looocum r ^ m c n m T - i ' - r o c n m i - i v - c o c n m t - i ^. c o c n v O T - i ^ - n c n K ' ) T - s - c N c o c o M - v u - j c D t o r ^ r ' - o o c n c n o o T - C M C N r o r o - ' T MONTHS FROM OCT 1973=1 Figure 16

13 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUNOFF AT STATION AGO Shangani Rail Rainfall Station 1? ESTIMATED RUNOFF xlooocum OBSERVED RUNOFF x 1000 cum Figure 16 1

14 ESTIMATED AND OBSERVED RUNOFF AT STATION AGO Shangani Ranch Rainfall Station Estim ated O bserved RUNOFF x looocum x r^. c o a ) m r - c o o > i n r - r ^ c o o > i r > T - r ^ c o o > m r - r v - c o a > i o T - v - c N c o o ' s r N ' i o t D t O f ^ - r ^ o o o i o i o o T - c N C N r o r o x r MONTHS FROM OCT 1973=1 Figurs 17

15 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUNOFF AT STATION A60 Shangani Ranch Rainfall station ESTIMATED RUNOFF x looocum GOOD OBSERVED RUNOFF x looocum

16 2500 ESTIMATED AND OBSERVED RUNOFF FOR STATION B36 Filabusi Rainfall Station Estim ated O bserved 2000 o CD r~ CD v- CD r - CD t- CD r - CO CD CD CD 00 tn M- 00 O CO CN CN CN CO CO CO MONTHS FROM OCT 1959=1

17 1800 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUNOFF AT STATION B36 Filabusi Rainfall Station 1600 ESTIMATED RUN OFF x looocum i* i ioo OBSERVED RUN OFF x looocum 112 Figure 16 1

18 ESTIMATED AND OBSERVED RUNOFF AT STATION B26 Kezi Rainfall Station Estim ated Observed PUN-OFF x 1000rum O CD CO t- v CN CO (O ID N" CO ID CO N CN t- 00 CD O O CD O co co uo T - (N CO N" N" CO ID CO -. r O CD CO CD CD O 217 MONTHS FROM OCT 1952=1 Figure 19

19 SCATTER DIAGRAM ESTIMATED VS OBSERVED RUN OFF AT STATION B26 Kezi Rainfall Station ESTIMATED RUN OFF x looocum OBSERVED RUN OFF x looocum

20 APPENDIX n Instructions for Microsoft Excel Spreadsheet

21 Instructions for M icrosoft Excel Spreadsheet A copy of the layout of the spreadsheet is attached The letters A to AP refer to the columns on Microsoft Excel Columns A to E have formula to derive the months in column F and the vears m Column I The first year o f record is entered manually in the first cell of this column and the rest o f the years are worked out automatically The following steps apply to micro catchment runoff analysis only They should be followed in calibrating the spreadsheet for appl.anon on each sub-zone Steps (b) to (0 and (q) to (s) are done only when step (a) is done for the first time Steps (g) to (k) are for frequency analysis which is done only after the rainfall-nmoff RAFLER has been calibrated to perform to the required accuracy a) Import output data from RAFLER. on to Excel Copy and paste data onto Column E the analysis spreadsheet (column E should have no entries before this step), b) on the analysis spreadsheet, extend data references and formulae in columns A B. C. D. F and G to match to range o f data in column E, c) extend data references and formulae in columns H and I to give correct reference to years o f rainfall records for the estimated runoff; d) extend column J to last year o f record in column I. e) import observ ed runoff data on to area bound at the tcp by entry A1 and AQ1 Do not import the annual totals, 0 exicnd data references and formulae in column AJ to cover all years o f observed runoff data, g) insert correct reference to annual totals o f observed data into column U Use column I to start entry in cell with correct year reference. hi copy values only from column J and paste th e n in column V, i) sort data in column V in ascending order. j ) extend column W to the same number o f column entries as in column L. 116

22 k ) enter the correct formult into Z 16 and replicate to the same number o f column entries as in column L The formula for Z 16 is o f the form <1- W 16/( S W S O -1)* 100 where <t> is the raw reference o f the last entry in Column W, 1) check month and year of first record o f observed runoff and work out cell reference for the corresponding estimated runoff using columns A B,C, D and E Enter this cell reference o f column E into cell AG 16, copy and replicate to extend data references and formulae down column AG, mi copy AH 16 and replicate down column AH to extend data references and formulae to the full length o f data in column AG, n) copy A ll6 and replicate down column A1 to extend data references and formulae to the lull length o f data in column AH, o) extend formulae in column AJ to cover whole range o f observed data Check that every entry is correct, p) correct cell references in column AN to read set o f continuous observed data for use in comparative analysis, q) correct cell references in column AO to read set o f estimated data to match the set of continuous observed data in coiumn AN, r) modify cell references and titles on graphs

23 i SUB-ZONE AS1, RAINFALL-STATION LUPANE,RUNOFF STATION A37 MICRO CATCHMENT CA (sq. km) 1370 A B C D E F G H I J K L M N Input Values < YEAR CALC Month Year Estimate Month Estimate Month I FREQUENCY ANALYSIS O ear Annual Esi An E mm P=1 P=1 P=

24 W AA AB P=2 P=3 P=3 P= P=4 10yr RM Annual Obs Esi Sorted Rank Annual Rank Frequency % on mean % on mean IP I iff

25 AC AD A( AF AG AH A) AJ Input Values I P=3 P=4 SCATTER TESTS % on mean % or mean mm Frequency Est Oct 64 Month Estimate Observed AK AL AM AN AO AP RAFLER Input Param eters Line 98 6 Line Line 1860 Line ,1,107858,12702,0 41, ,0 3,0,0 006 For Monthly Data Estimated Observed Mean Vanance Standard Deviation Maximum Minimum For Annual Data Estimated Observed Mean Variance Standard Deviation Maximum Minimum E E

26 Author Nyabeze W R R Name of thesis Development Of A Methodology For Draught Frequency Analysis Using Sub-Catchments In Zimbabwe Nyabeze W R R 1999 PUBLISHER: University of the Witwatersrand, Johannesburg 2013 LEGAL NOTICES: Copyright Notice: All materials on the U n i ve r si t y o f t h e Wi tw a te r s r an d, J o h a n n e sb u rg Lib r a r y website are protected by South African copyright law and may not be distributed, transmitted, displayed, or otherwise published in any format, without the prior written permission of the copyright owner. Disclaimer and Terms of Use: Provided that you maintain all copyright and other notices contained therein, you may download material (one machine readable copy and one print copy per page) for your personal and/or educational non-commercial use only. The University of the Witwatersrand, Johannesburg, is not responsible for any errors or omissions and excludes any and all liability for any errors in or omissions from the information on the Library website.

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