The front may be stimulated by the influence of the typhoon and it may rain a lot
Let's know the old rivers and poorly drained places that can't be seen now
At the Riverpine Disaster Prevention Driving Coaching Study Session, based on the philosophy of "considering disaster prevention from the driver's perspective," we give top priority to creating an environment where participants can deepen their learning with peace of mind.
From past Riverpine disaster prevention driving coaching study session
Quoted from the aerial viewing service of the Geographical Survey Institute
Water system maps are also quoted
We also use it from Google Maps.
An ordinary, ordinary map
I'm getting hungry.
Aerial photographs from the 1950s to the 1960s
Even this is hard to understand
The same place in 1947.
There are very few houses.
Let's zoom in.
This is not a comparison.
If you can read to the bottom
In the photo below, somehow
You can see traces of what used to be a river.
Can you find it?
It overlaps with the natural topographical map.
Oh my gosh, a place that used to be a river or easily filled with water has come out.
This time, I will also try to overlap the water map.
There is a small river near Mt.
The orange below is still high land
The light orange is lower than that.
It seems that it was originally a place that was easy to flow.




















































































