Macroinvertebrate survey of watercress farm outflows, Alresford, Autumn 2020

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Photo 2. Below Drayton Farm The above Drayton outflow was located at SU 59682 33310. The channel is approximately 1 - 1.5 metres wide and 0.2 – 0.3 metres deep. Water flow is maintained by discharge from the borehole. The habitats present consisted of gravel, coarse and fine sands, Ranunculus beds and marginal Glyceria maxima with small amounts of other marginal plants. This represents the head of the stream as upstream are the watercress beds and borehole supply. A good balance between Ranunculus growth and gravel (50:50%) was present this year compared to the previous which had been dominated by Ranunculus.

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