Verification of the Salt Transport Model Due to Wind-induced Flow Based on Field Data

Salt management at the reservoir exisiting in the reclamation land (II)

Abstract

In a desalting reservoir with a desalting conduit, water temperature, chlorine content and wind velocity over the water surface were measured from 1970 to 1974.
The gate attached to the conduit was operated during irrigation seasons, so the chlorine content of the surface layer was less than 1‰.
The gate was not operated during non-irrigation seasons, so the interface rose and chlorine content of the surface layer increased from 2 to 4‰.
Chlorine content of the bottom layer was 4 to 8‰ throughout the year. During typhoons and strong winter winds (Kisetsufu), salt was transported from the bottom to the surface layer due to the wind-induced flow, the interface moved lower and the chlorine content of the surface layer increased.
The validity of the vertical continuous layer model for analyzing chlorine transport was made using the observed data, and the conditions which prevent the transport of chlorine were determined.
Chlorine was not transported from the bottom to the surface layer when the Richardson number was greater than 5, 000.
From the results of numerical experiments for 48 cases and observed data, the chlorine content of the surface layer was expressed with an exponential function using three non-dimensional parameters.