Service Contract No 2007 / 147-446 - Swaziland

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TABLE OF CONTENTSMaphobeni Farmers Association ....................................................................................................................... iTABLE OF CONTENTS ................................................................................................................................. ivLIST OF TABLES ............................................................................................................................................ viLIST OF FIGURES ......................................................................................................................................... viiLIST OF APPENDICES ................................................................................................................................ viiiABBREVIATIONS ........................................................................................................................................... ix1 INTRODUCTION ............................................................................................... - 1 -2 BACKGROUND ON IRRIGATION DEVELOPMENT ....................................... - 2 -2.1 The project .............................................................................................................................................- 2 -3 TECHNICAL AUDIT REPORT .......................................................................... - 4 -3.1 REVIEW OF THE IRRIGATION DESIGN CRITERIA AND SPECIFICATIONS .....................- 4 -3.1.1 Irrigation Design and Specifications ...................................................................................................- 4 -3.1.1.1 General .......................................................................................................................................- 4 -3.1.1.2 Planning .....................................................................................................................................- 4 -3.1.2 Review of Contactor’s Irrigation Design Criteria and Specifications .................................................- 5 -3.1.2.1 Planning .....................................................................................................................................- 5 -4 FIELD EVALUATION OF IRRIGATION SYSTEM .......................................... - 14 -4.1 Pumps and Pump Stations ..................................................................................................................- 14 -4.1.1 Pump Suction Side ............................................................................................................................- 14 -4.1.1.1 Suction Pipe Flow Rate ............................................................................................................- 14 -4.1.1.2 Requirements for Fittings .........................................................................................................- 15 -4.1.1.3 Suction Pipe Inlets ...................................................................................................................- 18 -4.1.1.4 Suction side losses ...................................................................................................................- 20 -4.1.1.5 Suction height ..........................................................................................................................- 21 -4.1.1.6 Pump evaluation .......................................................................................................................- 22 -4.1.1.6.1 Power required on the pump shaft ......................................................................................- 23 -4.1.1.6.2 Pump Operation ..................................................................................................................- 24 -4.1.1.6.3 Output Power ......................................................................................................................- 24 -4.1.1.6.4 General ................................................................................................................................- 25 -4.2 Power Supply and Consumption .......................................................................................................- 28 -4.3 Supply System .....................................................................................................................................- 30 -4.3.1 Mainline size .....................................................................................................................................- 31 -4.3.2 Mainline class ...................................................................................................................................- 31 -4.4 System Capacity Evaluation ...............................................................................................................- 31 -5 FIELD EVALUATION OF SPRINKLER IRRIGATION SYSTEM .................... - 33 -5.1 Pressure readings ................................................................................................................................- 34 -5.1.1 Pressure at hydrant ............................................................................................................................- 34 -5.1.2 Sprinkler pressure .............................................................................................................................- 35 -Maphobeni Farmers Association Report - 2009Page iv
5.2 Delivery tests ........................................................................................................................................- 43 -5.2.1 Sprinkler discharge ...........................................................................................................................- 43 -6 ASSESSMENT OF OPERATION, MANAGEMENT AND MAINTENANCE OFTHE IRRIGATION SYSTEM .................................................................................. - 46 -6.1 Operation .............................................................................................................................................- 46 -6.2 Management Practices ........................................................................................................................- 49 -6.3 Maintenance Survey ...........................................................................................................................- 51 -7 CONSTRAINTS TO EFFICIENT SYSTEM PERFORMANCE ........................- 53 -8 RECOMMENDATIONS ...................................................................................- 57 -9 CONCLUSION ................................................................................................- 60 -10 LITERATURE REFERENCES .....................................................................- 61 -11 PRODUCT INFORMATION .........................................................................- 63 -12 APPENDICES .............................................................................................- 76 -Maphobeni Farmers Association Report - 2009Page v
Page 1 and 2: Restructuring and DiversificationMa
Page 3: DISCLAIMERThe contents of this repo
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 12 and 13: pumps. 2 x Howden 100-400 in the ri
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
Page 62 and 63:
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
Page 66 and 67:
8 R E C O M M E N D A T I O N STo e
Page 68 and 69:
OVERALL MANAGEMENT AND MAINTENANCEM
Page 70 and 71:
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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