Zambia is in southern Africa, east of Angola and south of the DRC, and provides some of the headwaters for both the Congo and the Zambezi. Only a small part of the country is semi-arid. So this is likely rainfall recharged or river recharged groundwater rather than an aquifer with slow or no recharge, with the irrigation shifting water resource from the wet season to the dry season.


I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.