Discussion on water-flows-from-north-to-south

[jabba]

It is my understanding from the H2M Report that the "groundwater
divide" runs northeast on a ridge created by the last glacier about
18,000 years ago. The water north of the divide flows north to the
Nissequoge River and into the LI Sound and water south of the divide
flows south to the Connetquot River and into the bay. The H2M Report
says this has changed due to the activities of man. My question is has
the "groundwater divide" changed more to the north or to the south?
The H2M Report was vague about this.

[LIWat...@gmail.com]

I think a detailed analysis of well data would be needed to determine
this, but the basic concept of the water divide is tha it is the
highest point of the water mound. Since there is little likelihood of
subsurface changes, the mound would most likely shift if water is
moved around the surface or if the points of recharge are moved or are
paved over and lost. However, my guess (and it is just that, a guess)
is that the divide has not shifted very far since development has been
fairly even both north and south of the divide.

I added a link is the most recent document I have with a depiction of
where the divide is. It is from a study done in 1999 by LIPA for
their Pinelawn project. Take a look at Figure 2.13-1 in this
document. See the Pinelawn Project Water Resources link at the bottom
of the original page.

[jabba]

Thank you for the reply information on this topic.