No this isn't about the
David Bowie song (although that's not stopping Gail humming it).
About once a week, when she has time, Gail takes me on an extended morning walk and instead of our usual circuit round Duthie Park we exit the park at the far end, cross the bridge over the Dee and walk along the south side of the river, opposite the park. We then cross another bridge back to the north side and home again through the park.
One of the things Gail and I love is observing how the river environment is always changing.
It's less than a mile from the harbour entrance and so the river at this point is tidal. On Tuesday this week we caught it at low tide.
If we had been there six hours earlier or later, the scene would have looked quite different, with the banks of sand and gravel submerged and the water lapping all the way up to the vegetation.
The water was quite still, and as I waded in and took a sip I started thinking about other changes I've noticed.
At low tide, the water is quite fresh and palatable, the river being fed by inland mountain streams, but the tidal flow brings in sea water and so at high tide it is salty and not at all nice to drink.
Now in summer, the water is an agreeable temperature if one fancies a refreshing dip. I think it might be a wee bit cooler at high tide as the sea water is generally colder than the river at this time of year. (Gail's kayaking friends tell her the opposite is the case in the winter.)
We had calm conditions on Tuesday, but when the wind whips up the waves I am not so fond of entering the water. And as you know, it is really windy most of the time in Scotland...
Likewise in periods of heavy rainfall the river swells and becomes turbulent and might even even burst its banks, and it's best to steer well clear.
Sometimes during a flood the current can be so strong that it scours deep holes in the sandy earth, and when the waters recede one's human has to take care not to stumble into these holes.
Oh gosh, there are so many more interesting things I could tell you about the river - the wildlife, the fishing, the heritage - but I guess you'll be wanting to go and read all the other lovely Nature Friday blog posts, so I'll leave it at that for today!