TS 8218

TS 8218 is a terminology standard for springs and for the way these natural groundwater outlets are classified. In hydrogeology and groundwater work, it helps establish a common technical language for describing how a spring is formed, how it appears in the field, and how it should be recorded. Its value lies in consistency: the same spring-related concepts can be used uniformly in mapping, data capture, and technical communication.

What “spring” means in a hydrogeological context

In general technical terms, a spring is where groundwater emerges naturally at the surface. Its behaviour depends on geology, permeability, fractures, pressure conditions, recharge area, and other site-specific factors. That is why clear terminology matters: discharge, persistence, emergence style, and surrounding hydrogeological setting describe the same natural feature from different angles. TS 8218 brings together the vocabulary and classification logic used for this subject area.

What this standard leaves out

The standard does not cover the classification of thermal and mineral water springs. This distinction is important because those waters are often treated as special cases due to their temperature, dissolved constituents, and typical uses. TS 8218 focuses on the general terminology and classification framework for springs as natural water outlets, while leaving specialised thermal and mineral water classifications outside its scope.

• Defines common technical terms related to springs.
• Provides a classification framework for natural water outlets.
• Supports consistent use in hydrogeology, environmental work, and natural water studies.
• Excludes the classification of thermal and mineral water springs.