Artesian springs occur when water is trapped between impervious layers and is forced to the surface under pressure. At these springs, the water comes out of the ground vertically.
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.