Assessment of the long-term irrigation effects with pollutant water on soil physical properties (Case study: Border land of Gharesoo River)

The main purpose of this study was to assessment the effects of long-term irrigation with pollutant water on soil physical properties of two water treatment as pollution water and well water during two years (2013 & 2014) on Gharesoo River located in Doroodfaraman district, in 20 km south of Kermanshah. This study was performed in three soil layers 30, 60 & 90 cm with three replications in randomized complete block design. In this study, soil physical properties including saturation hydraulic conductivity (Ks), soil moisture characteristic curve and parameters (θFC, θPWP & AW), bulk and practical density (ρb & ρa) and porosity (η) were determined. The results of statistical analysis showed that there was no uniform trend between various parameters. Using of the pollutant water was caused a significant difference at 5% level on saturated hydraulic conductivity but on the other physical properties of soil no significant difference were found. The results showed that irrigation with pollution water in loam soil increased saturation hydraulic conductivity ratio significantly but it decreased the moisture in FC, PWP and also bulk and practical density. It can be concluded that the use of pollutant water increased the soil porosity.