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Here are the steps to determine the effective rainfall of each month for Haiba irrigation scheme: 1. Calculate the dependable rainfall (Pdep) for each month as the average of the monthly rainfall amounts over the 17 years. 2. Use the formula Pe = 0.6 * Pdep - 10 for months where Pdep < 70 mm. 3. Use the formula Pe = 0.8 * Pdep - 24 for months where Pdep > 70 mm. 4. The results are shown in the table below: Month Pdep (mm) Pe (mm) Jan 4.2 1.6 Feb 3.2 0.8 Mar

Author

Mamuye Busier Yesuf

Language

EN