Title : Vegetal yield according to the water used in irrigation, between groundwater and unconventional water: case of the peri-urban perimeter of Mascara
The proven lack of water resources has led farmers in the Mascara perimeter to take the initiative to manage the purified water from the Mascara wastewater treatment station, as well as the use of raw water from the " Oued in support of irrigation. This practice has a direct impact on cultivation practices and irrigation patterns within the perimeter. In order to construct a clear vision of the management model of the 3 types of water resources, purified, raw and underground, and the impacts generated locally, 28 surveys were carried out with 26 farmers, a public services manager and a technician of the wastewater treatment station. These surveys were conducted in two stages between April - July 2014 and May 2017. This practice of groundwater irrigation, reinforced by the water of the treatment plant in a formal way, and by the raw sewage in an informal way makes the practice of irrigation reliable and continuous even in the Periods of drought, which favors the typological diversification in market gardening crops. Potatoes, onions and lettuce are the main crops of the perimeter, the crops practiced and the irrigation systems used depend essentially on the type of water used. The proximity of unconventional waters constitutes the ideal place, it allows the multiplication of short cycles in gardening. Delegated management of purified water, from public services to users has proved effective in case measuring the sustainability of the perimeter hydro-agricultural system, and shows how attachment to the common social capital leads to the emergence of approaches to water management at the local level.