Service Contract No 2007 / 147-446 - Swaziland

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pumps. 2 x Howden 100-400 in the river pump station and 2 x Howden 100-250 in thebooster pump station.Figure 2. Maphobeni balancing dam‣ An intake sump was constructed with phase two river pump station. A provision wasmade for phase one.‣ Phase two laterals and sub-mains were designed so as to handle flow from allhydromatics along the lateral. Generally they start of from the sub-main as 75mmreducing to 63mm then 50mm at the end.‣ The size of phase one lateral is not known for sure.‣ Maphobeni irrigation scheme was developed on three types of soils, the Lesibovu,Rondspring and Somerling soil series. The L and R sets are deep, red, wellstructured, free draining soils with high water holding capacity and highly fertile. The Ssets are type three soils (land classification) with shallow but well structured soils,draining freely, and low water holding capacity.‣ Three sugarcane varieties are under cultivation, N23, N19 and NCo376Maphobeni Farmers Association Report - 2009 Page - 3 -
3 T E C H N I C A L A U D I T R E P O RT3 . 1 R E V I E W O F T H E I R R I G A T I O N D E S I G N C R I T E R I AA N D S P E C I F I C A T I O N S3.1.1 I r r i g a t i o n D e s i g n a n d S p e c i f i c a t i o n s3.1.1.1 GeneralDesign information from the designers of both phases and from the client representativeduring construction, Ubombo Sugar could not be obtained. The design was therefore checkedagainst <strong>Swaziland</strong> sugar standards and SABI norms.The following is the design criteria used in the sugar industry against which this project wasevaluated on.3.1.1.2 PlanningThe main criteria for the irrigation systems are given below:CropSugarcaneDesign irrigated area 151 HaGross Application 52 mmNet Application39 mmIrrigation Cycle6 DaysSprinkler discharge 0.39l/sSprinkler Spacing 18 m x 18 mApplication Efficiency 75%Stand Time12 hours (depending on soil)Gross Precipitation 4.33 mm/hourAnnual Irrigation hours 3 300 hoursMaphobeni Farmers Association Report - 2009 Page - 4 -
Page 1 and 2: Restructuring and DiversificationMa
Page 3 and 4: DISCLAIMERThe contents of this repo
Page 5 and 6: 5.2 Delivery tests ................
Page 8 and 9: LIST OF APPENDICESAppendix 1: SEB u
Page 10 and 11: 1 I N T R O D U C T I O NAssociatio
Page 14 and 15: 3.1.2 R e v i e w o f C o n t a c t
Page 16 and 17: 9 SCHEDULE OF BLOCKS THAT IRRIGATE
Page 18 and 19: Maphobeni Farmers Association Repor
Page 24 and 25: Based on equation 1 above the flow
Page 26 and 27: ReducersThe inlet on the pump sucti
Page 28 and 29: d1.5d0.5dd3d 3d 1.5dFigure 9. Spaci
Page 30 and 31: hf6375kQ4d2……………………
Page 32 and 33: Table 1. Pump and motor specificati
Page 34 and 35: Table 2. Irrigation pumps evaluatio
Page 36 and 37: Phase two river pump station‣ Pum
Page 38 and 39: Filters: 3%Capital Recovery Rate (C
Page 40 and 41: 4.3.1 M a i n l i n e s i z eThe So
Page 42 and 43: 5 F I E L D E V A L U A T I O N O F
Page 44 and 45: 5.1.2 S p r i n k l e r p r e s s u
Page 46 and 47: 0 L/4 L/2 3L/4 LL3L/4LL/2Test block
Page 48 and 49: Phase two booster Pumps running und
Page 50 and 51: The installation of this unit (on t
Page 52 and 53: Old AgePhase one of the irrigation
Page 54 and 55: The effects of different nozzles/em
Page 56 and 57: Interest RatesIt can be argued that
Page 58 and 59: 6 . 2 M a n a g e m e n t P r a c t
Page 60 and 61: 6 . 3 M a i n t e n a n c e S u r v
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7 C O N S T R A I N T S T O E F F I
Page 64 and 65:
phase one and two was found to be 1
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8 R E C O M M E N D A T I O N STo e
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OVERALL MANAGEMENT AND MAINTENANCEM
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10 L I T E R A T U R E R E F E R E
Page 72 and 73:
11 P R O D U C T I N F O R M A T I
Page 74 and 75:
Maphobeni Farmers Association Repor
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
SEB usage for River pump station Ph
Page 88:
Appendix 2: capital recovery factor
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Service Contract No 2007 / 147-446 - Swaziland

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