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null point

null point
1. In nearshore, shoaling waters, each particle-size of sediment should hypothetically have a null point, where there is no net movement of the particle landward or seaward. It is the point where there is a balance between the component of gravity acting down the slope in a seaward direction and the force on the particle resulting from the difference between the crest and trough velocities of the waves which tends to move the particle landwards.

2. In an estuary, the point at which the residual sea water landward flow is balanced by the seaward residual river flow.

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"null point." A Dictionary of Earth Sciences. . Encyclopedia.com. 23 Aug. 2017 <http://www.encyclopedia.com>.

"null point." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/null-point

"null point." A Dictionary of Earth Sciences. . Retrieved August 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/null-point

null point

null point
1. In near-shore, shoaling waters, the (hypothetical) place at which there is no net movement of a particle of sediment landward or seaward, because there is a balance between the component of gravity acting down the slope in a seaward direction and the force on the particle resulting from the difference between the crest and trough velocities of the waves which tends to move the particle landwards.

2. In an estuary, the point at which the residual landward flow of sea water is balanced by the residual seaward flow of river water.

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"null point." A Dictionary of Ecology. . Encyclopedia.com. 23 Aug. 2017 <http://www.encyclopedia.com>.

"null point." A Dictionary of Ecology. . Encyclopedia.com. (August 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/null-point-0

"null point." A Dictionary of Ecology. . Retrieved August 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/null-point-0