Masters of design...
Chinampas require two things that are not naturally found in the Basin of Mexico. Chinampas need a constant supply of fresh water as well as stable water level (Hassig 1985). King Itzcotle petitioned a system of dikes, canals, and aquaducts to be built (Hassig 1985). The large undertaking leads Hassig (1985) to believe that the development must have been a part of a "highly centralized political entity." The regularity of the chinampa organization seems to be evidence that supports Hassig's conclusion (Hodge and Smith 1994). King Montezuma I employed 20,000 men to build a stone dike ten miles long. It stopped Tenochtitlan's flooding and lowered the lake's salinity (Werner 1992).
Fig 4: Chinampa Plots behind residential areas (Berdan 2005)