MSc Aquatic Ecosystems Management

Freshwater Biological Monitoring

Macroinvertebrate sampling in the River Almond

 

 

 
Getting kitted out for sampling

 
     
 
 

After a long dry summer, the weather changed quite suddenly and the river rose by almost half a metre. We sampled the Linhouse Water first: this is a tribuary of the main River Almond at East Calder. The invertebrate communities were sampled with a standard kick-net, and temperature, conductivity, dissolved oxygen and flow rate measured. pH was measured back at the lab.

 

 
 

Linhouse data:
Temp. 4.3°C; DO 12.38mg/l=95.2% saturation; Conductivity 226µS; pH 7.78 (7.8)

 

   
 

With such strong flows it was necessary for the sampler to be roped up for safety while kick sampling.


This was the same location 2 years ago.

 
       
 

The current was also strong in the main river: this site is upstream of the East Calder Sewage works discharge.

 
 

Upstream site data:
Temp. 4.7°C; DO 12.46mg/l=96.7% saturation; Conductivity 328µS; pH 7.83 (7.8)

 

   
 

This is the discharge from the Sewage Treatment Works (photographed on a different occasion)
 
       
 

 

Downstream of the discharge, more samples were taken while other members of the team measured the flow velocity, Dissolved Oxygen, temperature and conductivity. We also took samples to measure pH back at the lab.

 
 

Downstream site data:
Temp. 5.0°C; DO 12.26mg/l=95.9% saturation; Conductivity 412µS; pH 7.85 (7.9)

 

   
 

 

 
 

The sites sampled were also those from which samples for microbiological tests were collected

The same location under low flow conditions, looking upstream towards the WWTW

 
 
 
 

Going through the motions!

Removing the catch from the kick net.

 
       
 

 

 

 

 

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