- On 28th September 2018
- In Ecology, Sediment Management, Water Management
- By William Coulet
At the end of September, Exo was called out to complete sediment sampling at Boston Manor Park in London. When we arrived on site, we were a bit surprised to see a completely green pond and it was immediately obvious why some work is needed. The complete covering of the water surface with common duckweed, Lemna minor, is an indication of very unhealthy conditions and eutrophication likely caused by waterfowl excrement. The removal of the nutrients (sediment) from the pond and aquatic weeds will improve the water quality and restore the balance of the pond’s ecosystem.
In order to access the water Exo deployed a Zodiac inflatable dinghy, this keeps the mobilisation time down and the cost low. Although we received some funny looks from passers-by, we were fully kitted out and clearly there for work and not pleasure. Most members of the public were very interested to learn more about what the team was doing at their beloved park and that possibly the council was looking into restoring this deteriorated pond.
The sample collection was straightforward, with the sediment stored in appropriate receptacles and sent to the laboratory for chemical and physical analysis. Plans will be further developed for the restoration of this ‘potentially‘ lovely pond upon return of the analysis results.