The most important reason why the British were reluctant to withdraw their occupation from Egypt was the Suez Canal. Before it was nationalized by Nasser, it was controlled by the Suez Canal Company and symbolized Egypt's exploitation by the West. Explain the differences between basin irrigation and perennial irrigation and discuss advancements that made possible, the shift to perennial irrigation. Basin irrigation relied on the annual floods and allowed only one crop per year. Perennial irrigation Relies on a storage facility holding water from times of peak flow to be dispersed during times of low flow.
Perennial irrigation is year round and allows multiple crops.
Basin irrigation relied on the flood waters to deposit silt which provided fertilization. Basin irrigation Cleansed the soil as the waters receded, effectively preventing the build up of salts. Perennial irrigation does not provide this cleansing action, the water table remains high. Explain why the estimated amount of available PPY water falls so dramatically. Justify your answer.