At last, the pond has three basins

The three basins have separated out now as water levels have gone down

The three basins have separated out now as water levels have gone down

For the first time in two and a half years the pond is just starting to look the way it was designed to:  as water levels fell during the dry September weather, it separated into three basins of different depths.

So rather than keeping it constantly topped up, a very unnatural state of affairs as water levels naturally go up and down during the year with many advantages for wildlife, I made it with three basins which would separate out into three different ponds as water levels fell.

In this way I hoped to maximise diversity of habitat in the pond – the three ponds will have slightly different water chemistry, different habitats, and should dry out at different times.

The conductivity today was 72 in the big basin (at the back), 94 in the medium basin and an intermediate 84 in the small basin at the front. When the pond is full conductivity does not change by more than 5 or 10 points from one part of the pond to another, so even a short period of separation looks like it may be causing greater than normal variation in water chemistry – it is this kind of variation from one pond to another which helps to make ponds collectively such rich wildlife habitats.

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