AU - Chavoshi, E. AU - Afyuni, M. AU - Hajabbasi, M. A. TI - Simulation of Fluoride Transport in a Calcareous Soil Using HYDRUS-1D PT - JOURNAL ARTICLE TA - JSTNAR JN - JSTNAR VO - 19 VI - 72 IP - 72 4099 - http://jstnar.iut.ac.ir/article-1-3075-en.html 4100 - http://jstnar.iut.ac.ir/article-1-3075-en.pdf SO - JSTNAR 72 ABĀ  - Transport of fluoride and consumption of groundwater with excess fluoride concentrations poses a health threat to millions of people around the world. The objective of this study was to simulate transport of fluoride (F) using HYDRUS-1D model. The study was conducted in lysimeters at Lavark research station site in Isfahan. The treatments consisted of two concentrations of F (157 and 315 mg kg-1). The duration of the study was 125 days. Some of soil physical and chemical properties, soluble F and total F concentration were determined during the study. The results showed the transport of F in calcareous soil profiles. This may be due to the high pH and desorption of F ion as a result of repulsion by the more negatively charged soil surfaces. The highest concentration of total F and water soluble F were observed in the 10 cm surface soil layer. The concentration of F decreased with increased soil depth. The correlation coefficient was significant between the water soluble fluoride and the total fluoride (1% level). Also, the difference between the observed t- value and a critical value on the t distribution is statistically insignificant. It showed that the model simulated successfully water soluble F concentration in the soil profile. CP - IRAN IN - 1. Dept. of Soil Sci., Collage of Agric., Isfahan (Khorasgan) Branch, Islamic Azad Univ., Isfahan, Iran. LG - eng PB - JSTNAR PG - 205 PT - Research YR - 2015