Model E: A confined aquifer, unconnected hydraulically with any surface body of water, with a zone of recharge (possibly in an unconfined portion of the aquifer) that traverses an international boundary or that is located completely in another state

Hydrogeological Approach to Transboundary Ground Water
Resources and International Law

19 Amer. Int'l L.R. 201 (2003), p. 204
Gabriel Eckstein & Yoram Eckstein