Near Chuquiña satellite maps show a huge "qocha".
A "qocha" (small lake, lagoon) is an artificial pond used to gain water for cultivation.
Waru-warus, camellones, qochas were old pre-incaic cultivation techniques.
On Andean qochas you can find more info here
http://www.archaeogate.org/sperimentale/article/1396/1/qochas-on-andean-highlands-by-amelia-carolina-sparavign.html
http://stretchingtheboundaries.blogspot.it/2011/04/qocha.html
http://stretchingtheboundaries.blogspot.it/2011/04/raised-fields.html
http://stretchingtheboundaries.blogspot.it/2011/05/le-qochas-dellaltopiano-andino.html
