Surface film behaviour at spring emergence — 02 April
Date
02 April 2026
Time
09:42
Conditions
Dry weather. No recent rainfall. Low flow conditions at the spring.
Location
Spring emergence and pooled areas within the upper watercourse.
Observation
A thin surface film was observed forming on pooled areas of water at and near the spring emergence.
The film appeared iridescent in places and was most visible in still or slow-moving sections.
When disturbed, the film broke into discrete plate-like fragments rather than dispersing smoothly.
The film did not immediately reform into a continuous surface layer following disturbance.
Evidence
Direct field observation of surface film behaviour.
Disturbance test carried out using a stick to observe response of surface film.
Photographs taken before and after disturbance.
Observed in multiple pooled locations within the upper system.
Status
Observation only