The Canal System: the marvel of the desert

 

That canal system in time became the most elaborate and well-engineered in all of North America if not the world.  The Ancestral People cooperated to build and manage a vast canal system that diverted waters from the rivers to irrigate their croplands.  Because these croplands were located in land that was lower than the surrounding rivers the canals were started about 17 miles away to divert water by gravity flow. Where there were croplands without nearby rivers, they diverted storm run-off or tapped groundwater.

The canals were amazing. First of all, they were constructed entirely by human labor without any draft animals. The only tools they had were made of wood or stone. They had no shovels. The ground was true hard pan that made digging very difficult. The slope of canals was 2 ft. for 1 mile.  That is a very gentle slope, but it is more than enough to lead the water to where they wanted it. The canals were also surprisingly large. They were about as tall as a man.

This was very sophisticated agriculture. They farmed the area for about a thousand years. At its height the canals irrigated 1,900 acres of land. The canals stretched for 220 miles in this area alone. What amazed me was that these Ancestral People were extremely successful farmers. They produced higher yields than modern farmers with modern equipment and techniques. Modern Hohokam farmers see people as their main resource.

Following their ancestral heritage, they became what they call “scientists of our environment.”  Like other nations in the Americas, they used and continue to use meteorological principles to establish planting, harvesting, ceremonial cycles and they developed complex water storage and delivery systems.

I was also astonished to learn that there is evidence that the ancestral people were about 2-3 inches taller than the Europeans who arrived in the 17th century. Like the indigenous people of the Great Plains who relied principally on bison, that meant they were better fed than the Europeans who came here to civilize them! Perhaps the ancestral people ought to have civilized the Europeans! After all, the period of 300 to 1450 A.D. was the period of the Dark and Middle Ages in Europe.

When Father Keno was the first European to see this land in 1694, about 200 years after the Ancestral people of the Sonoran Desert left, he was struck by the beauty and ingenuity of the building. That is why he called the main structure that was left. Casa Grande (Great House) because he said he had never seen anything comparable in Europe.

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