English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A three-dimensional steady state model involving the effect of dispersion is used to stimulate seawater encroachment in the confined aquifers in the estuaries of the Naka River, Tokushima Prefecture, and the Kiki River, Ehime Prefecture. The magnitudes of the dispersion coefficients in the above two regions together with those in other experimental and observational studies are reviewed from the viewpoint of the scale effect. The main results are as follows: 1) The horizontal and vertical dispersion coefficients are 5 cm2•Esec-1 and 5 to 0.5 cm2•Esec-1 in the estuary of the Naka River, respectively. In the estuary of the Kiki River, the corresponding values are 0.2 cm2•Esec-1 and 0.2 to 0.02 cm2•Esec-1, respectively. 2) The groundwater level predicted with the dispersion model is almost the same as the one with the interface model (KAKINUMA et al., 1984) and about 1.3 times the observed one. 3) The ratio of the dispersion coefficient to the hydraulic conductivity is proportional to the thickness of the aquifer. This result is consistent with the one given by the hydraulic similitude.

rikusuigaku zasshi/rikusuigaku zasshi

Studies on the motion of ground water with dispersion in coastal aquifers. I. Dispersion coefficients in Naka River and Kiki River estuaries and scale effect.