Impacts of Floodwater Spreading in some Chemical Soil Properties

Floodwater spreading plan in arid and semiarid area were constructed with different objectives such as sustain fertility and vegetation recovery. Sedimentation of suspended particles in coarse textured land can be a major problem. By regarding to quality and quantity of floods and salt accumulation, it leads to some differences in soil properties like salinity and alkalinity. So, to find out the suitable methods to inhibit of soil degradation, it is needed to study physico-chemical characteristics of floodwater spreading mechanisms. In this research, the impacts of floodwater spreading studied in Poldasht floodwater spreading station, Iran. A grid sampling method was used in this research. There were selected 63 points within the Poldasht floodwater spreading system. Soil sampling was carried out, are, EC, SAR and soluble cations and anions such as Ca2+, Mg2+ , Na+, So4 2-, Cl– and HCO3- were measured between three strips which is flooded. Non-parametric tests were used to analyze the abnormally distributed data. The results showed there are significant differences in some chemical soil properties over three strips. In comparison between 3 strips some parameters such as EC, soluble Ca2+, Mg2+, Na+, So42 were increased in first strip, whereas SAR has no significant difference.