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How did Ishelhiyen farmers in the High Atlas irrigate their fields?

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Map showing the Atlas Mountains across Morocco, Algeria, and Tunisia in North Africa, with color shading to indicate elevation changes. Major mountain ranges, cities, rivers, and physical features such as the High Atlas, Anti-Atlas, Saharan Atlas, and surrounding deserts are labeled. An inset locator map highlights the region's position in northern Africa. — Atlas Mountains The Atlas Mountains.

In the High Atlas of Morocco, Ishelhiyen farmers irrigate their fields by diverting water from wadis—watercourses that are typically dry except during periods of rain. This irrigation practice allows the land to yield two crops per year: cereals in the winter and vegetables in the summer.12