 As the winter snows start to melt in the spring, an intricate irrigation system of dams, canals and channels brings vital water supplies down to the wine regions to sustain viticulture in the dry, arid climates.Most of the wine regions are located within the foothills of the Andes and recent trends have seen a push to plant vineyards on higher elevations closer to the mountains.The climate in some of this regions can be more continental and less prone to extremes in temperatures.