There is a leak in my basement as you can see in the picture below, probably close to the roof of the basement as I've highlighted in my picture.
- How can I find that leak, knowing I cannot spot it?
PS: Should I mention , the basement's roof is close to a rain gutter. Each time it is raining, the water drops close to that basement and the leak/hole is making the basement wet and sometimes flooded (when raining heavily).
Update: This is what stand above , on the corner where the leak is happening