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

LIST OF TABLESTABLE 1. PUMP AND MOTOR SPECIFICATIONS AND MEASUREMENTS CONDUCTED ON PUMP ...................... - 18 -TABLE 2. SPRINKLER VALUATED BLOCK SUMMARY ........................................................................................... - 25 -TABLE 2.TECHNICAL PROPERTIES OF SPRINKLERS FOUND ON SITE AT 35M OPERATING PRESSURE ................ - 26 -TABLE 4.OPTIMAL OPERATING PRESSURE VS NOZZLE DIAMETER FOR SPRINKLERS ......................................... - 28 -TABLE 5. MAINTENANCE SCHEDULE FOR SPRINKLER IRRIGATION SYSTEMS ..................................................... - 33 -TABLE 6. MAINTENANCE PRACTICES IMPLEMENTED BY NYANYALI FARMERS .................................................. - 33 -LIST OF FIGURESFIGURE 1 PUMP HOUSE NEXT TO THE MKONDO RIVER ...................................................................................... - 2 -FIGURE 2 LATERAL ISOLATION VALVES ................................................................................................................ - 3 -FIGURE 3.SAPWAT SCREEN INDICATING WATER REQUIREMENT FOR SPRINKLER IRRIGATION WITH RAINFALLTAKEN INTO ACCOUNT ................................................................................................................................ - 7 -FIGURE 4. REQUIRED RADIUS OF 90 BENDS (SOURCE: ARC (2007)) .................................................................. - 11 -FIGURE 5. 2 X 300MM X 45° BENDS ON PUMP SUCTION MANIFOLD ................................................................ - 12 -FIGURE 6. CONCENTRIC AND ECCENTRIC REDUCERS ......................................................................................... - 12 -FIGURE 7. INCORRECTLY DIMENSIONED ECCENTRIC REDUCER ......................................................................... - 13 -FIGURE 8. SPACING AND PLACING OF SUCTION PIPE INLETS............................................................................. - 14 -FIGURE 9. NYANYALI INTAKE SUMP ALONG THE CROCODILE INFESTED MKHONDVO RIVER ............................ - 14 -FIGURE 10. MINIMUM WATER DEPTH ABOVE SUCTION PIPE INLET ................................................................. - 15 -FIGURE 11. ATMOSPHERIC PRESSURE VS. HEIGHT ABOVE SEA LEVEL ............................................................... - 17 -FIGURE 12. IRON OXIDE ACCUMULATES IN THE MKHONDVO RIVER ................................................................ - 18 -FIGURE 13. INSIDE NYANYALI PUMP HOUSE ...................................................................................................... - 20 -FIGURE 15. LATERAL ISOLATION VALVES ........................................................................................................... - 26 -FIGURE 16. MEASURING APPARATUS FOR SPRINKLER NOZZLE SIZE ................................................................. - 27 -FIGURE 17. NYANYALI YIELD IN TONES CANE PER HECTARE .............................................................................. - 31 -LIST OF APPENDICESAppendix 1: SEB usage for river pump station phase 2Appendix 2: capital recovery factors (CRF)Appendix 3: soil map and block layoutAppendix 4: Farm BoundariesNyanyali Farmers Cooperative Report - 2009Page vi