Shallow groundwater

I dig water catchment pits all along the slope. This particular one seems to hold water the best.
Looking at the picture does it seem thst water is slowly flowing into the ground?

I'm hoping it indicates a shallow underground waterflow i can tap into.

I dont understand why you think there will be shallow ground water, simply because one of the pits quickly allows water to soak into the ground.
The two facts are not always interconnected.