Hello @velimir
Once again, I'm convinced that winter is bypassing you. Despite the fact that it's cold - the water in the river remains in a liquid state :) We have here the rivers are completely frozen.. Although the trend has recently changed. Apparently climate change.
As the sages said - you can endlessly look at three things - how the water flows, how the fire burns and how the ATM reads you money, a joke.
Indeed, the soothing property of water, especially when it is a river. Contemplation of water or fire is a great way to relieve nervous tension and get rid of obsessive thoughts. I often notice this with myself.
Unfortunately you are right, rivers are often used for waste disposal and sewerage. This greatly pollutes the environment. This is a side effect of progress. Although in some countries this phenomenon is not observed.
For example, in Iceland, the water is so clean that you can drink it from the river (information from reliable sources).
The motorcycle on every photo is like a decoration.
Good day