In the Name of Allah, Most Gracious, Most Merciful

BARRIER BETWEEN SWEET AND SALT WATERS

Consider the following Qur'anic verses:

In the Arabic text the word barzakh means a barrier or a partition. This barrier, however, is not a physical partition. The Arabic word maraja literally means ‘they both meet and mix with each other’. Early commentators of the Qur’an were unable to explain the two opposite meanings for the two bodies of water, i.e. they meet and mix, and at the same time there is a barrier between them. Modern Science has discovered that in the places where two different seas meet, there is a barrier between them. This barrier divides the two seas so that each sea has its own temperature, salinity and density.1

 Oceanologists are now in a better position to explain this verse. There is a slanted unseen water barrier between the two seas through which water from one sea passes to the other.

But when the water from one sea enters the other sea, it loses its distinctive characteristic and becomes homogenized with the other water. In a way this barrier serves as a transitional homogenizing area for the two waters.

This scientific  phenomenon  mentioned in  the Qur'an was also confirmed by Dr. William hay who is a well known marine scientist and Professor of Geological Sciences at University of Colorado, U.S.A.

The Qur'an mentions this phenomenon also in the following verse:

This phenomenon occurs in several places, including the divider between the Mediterranean and the Atlantic Ocean at Gibralter.

But when the Qur’an speaks about the divider between fresh and salt water, it mentions the existence of "a forbidding partition" with the barrier.

Modern science has discovered that in estuaries, where fresh (sweet) and salt water meet, the situation is somewhat different from that found in places where two seas meet. It has been discovered that what distinguishes fresh water from salt water in estuaries is a "pycnocline zone with a marked density discontinuity separating the two layers."2 This partition (zone of separation) has a salinity different from both the fresh water and the salt water.3

This phenomenon occurs in several places, including Egypt, where the river Nile flows into the Mediterranean Sea.

1Principles of Oceanography, Davis, pp. 92-93.

2 Oceanography, Gross, p. 242. Also see Introductory Oceanography,Thurman, pp. 300-301.

3 Oceanography, Gross, p. 244 and Introductory Oceanography,Thurman, pp. 300-301.