The brief
Our aquatic team were required to survey several ditch sites to assess the range of aquatic invertebrates in them. This was part of our client’s on-going flood defence works.
What we did
- Ditches which had been proposed to be infilled were investigated by our aquatic specialists to identify if any rare or scarce species were inhabiting them. Our team surveyed the ditches using a standardised 1mm mesh pond net, and following best practice protocol.
- Several water quality parameters were analysed in the field.
- Aquatic macroinvertebrate identifications were completed either in the field or back in the laboratory.
- Aquatic invertebrates were identified to family level.
- Biotic indices scores were assessed and the Biological Monitoring Working Party (BMWP) biotic index was used to calculate scores for key family groups of aquatic invertebrates present based on their sensitivity to pollution.
Client
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Team Van OordLocation
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Congresbury Yeo, Somerset
Services offeredOur survey showed that water quality scores for the sites were classed as ‘Moderate’ or ‘Poor’. No aquatic invertebrates were recorded as being rare or scarce. Works at Congresbury Yeo were able to continue as no mitigation measures were required.Thomson project manager, aquatic macroinvertebrate survey & identification, Congresbury Yeo -
Our other projects
Our services
Environmental consultancy services covering all ecosystems
We cover all aspects of environmental consultation – from smaller surveys through to strategic projects.
Our culture and values
Our culture and R.I.S.E. values help bind us together as a business
At Thomson, we strive to deliver a pragmatic and innovative approach to environmental compliance.
Working in partnership with our clients, our team of environmental specialists ensures objectives are met, with maximum efficiency for our clients, and minimal impact on the natural world.
