From the article, Los camellones alrededor del lago Titicaca, by Pierre Morlon, 2006.
The article is discussing the traditional agricultural methods used near Lake Titicaca; these methods are more than two thousands years old.
A "qocha" (small lake, lagoon) is an artificial pond used to gain water for cultivation. The text is telling that up to fifty years ago, waru-warus, camellones, qochas were much more extensive on the land but they were deliberately destroyed.
A qocha.