Service Contract No 2007 / 147-446 - Swaziland

3.1.2 R e v i e w o f C o n t a c t o r ’s 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 s3.1.2.1 PlanningOf the four major input of planning namely crop, climate, soil and irrigation system; the studyrevealed that crop and climate information used as supplied by the SSA (Swaziland SugarAssociation). Design documentation could not be obtained but site investigations revealedthat the irrigation system developed only of good soils (mostly type I soils, only block I is ontype III soils). Based on this, soils were taken into account in the design.Attached in appendices is a soil map of Maphobeni Farmers Association indicating major soiltypes the project was developed on. Information on whether soils were taken into accountduring design could not be found.The purpose of this study was, therefore, to determine the quantity of water required by thecrops per cycle during peak demand periods and how often it was to be applied takingpractical operating practice into account.Taking soils into account the following planning schedule was developed;Peak Design-Norm For Sprinkler Irrigation At Maphobeni Farmers Ass.1 GENERAL INFORMATION1,1 Owner Maphobeni Farmers Association1,2 Farm Name - Number - Co-ordinates Swazi nation land1,3 Telephone number1,4 Area developed 151 Ha1,5 Water Allocation 100 l/s2 CLIMATE2,1 Month state Jan2,2 Weather station state Mhlume2,3 Evaporation mm/day 7mm A-Pan or 5mm Grass Factor3 MANAGEMENT3,1 Available working days per week days 73,2 Available working Hours per day hours 24Maphobeni Farmers Association Report - 2009 Page - 5 -