Why did they build Chinampas?
Similarly, it is asked, why did the Aztecs build Chinampas?
To use the hilly land for farming, the Aztecs terraced the hills by cutting into them. They then built a restraining wall to form a step in the hillside so that the land on the step can be used for crops. The chinampas farms were man-made plots of land built up from the sedimentation from the bottom of the lake.
In respect to this, when were Chinampas created?
The Aztecs did not invent chinampa technology. The earliest chinampas in the Basin of Mexico date to the Middle Postclassic periods, about 1250 CE, more than 150 years before the formation of the Aztec empire in 1431.
Raised plots for crops were built from mud in the lake bed with canals between them. Chinampas were an Aztec form of Agriculture which consisted of small, rectangular plantations. With canals forming around them and plantations on raised mud plots.