The Influence of Low Salinity Irrigation Water to Ground Water near Seashore Regions

Abstract

Farm irrigation near seashore has become a problem due to the influence of saltwater from sea and the high salt content contained in the irrigation water. As a solution of this problem, irrigation is planned for the Kashima-Nanbu area and the purpose of this paper is to analyze the diffusion of low salinity irrigation water. We carried out experiments with equipment as a trial and performed a simulation during these experiments. As a result of our work, it was found that although long-term and heavy irrigation is not really being carried out, irrigation water did not seem to reach the lower aquifer.
As the irrigation position is setted landwards, irrigation water reaches to low aquifer. Movenent and diffusion of irrigation water are influenced by the irrigation rate, irrigation period and permeability.