It's not the big things that always fill the mind when travelling the long distance from the outer suburbs. These days, I don't read on my way in, but rather listen to taped lectures. If I watch videos, it's while I'm half-distracted with the world around me - inside or outside the train.
It is in this way that I notice the gradual change from creeks & open channels that were probably once streams in their own right, into marshlands, canals & suburban storm-water systems of increasing complexity. It is fascinating to work out what flows are going to where, & why.
This morning, I was struck by the weirs & crossings that have been built in concrete in open areas. There may be more concrete nearby - bridges, etc - but the base of the water course is rock (I think). As we travelled along our steel rail, a half dozen common ducks splashed about in the shallows of the water trickling over the weir.
That made my day.
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