Service Contract No 2007 / 147-446 - Swaziland
Service Contract No 2007 / 147-446 - Swaziland
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