Feasibility and costs of stimulating rainfall from naturally formed clouds by silver iodide seeding, with estimates for a project in the western slopes of the Judean hills. A systematic method for catching, conserving, and distributing the water is essential. Israel already has such a water control system, designed for water from Lake Tiberias and the Jordan. Lacking a water control system, rain stimulation in, say, the Tigris-Euphrates basin would be worse than useless. The 20 percent increases in annual rainfall in the Israel experiments would, in the long run, increase the productive water supply by 10 percent to 15 percent, at a cost of $.40 per acre/foot. Even if costs were twice the estimate and retained water amounted to one-fourth the estimate, cost would be only $3.20 per acre/foot for an austere program. Success requires good weather observation and forecasting, knowing when to intervene and when to leave nature to her own devices. 13 pp. Ref.
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