Investigation of Flood Water Spreading Effects on the Changes of Soil Infiltration Rate and Sediment Depth (Case Study: Kalate Sadat Watershed - Sabzevar)

In the network of floodwater spreading and artificial recharge system, deposition is the main obstacle of infiltration water in the soil and reaching of water to the groundwater. Soil infiltration reduction depends on suspended material, the infiltration rate, soil physical characteristics and quality of the floodwater spreading. Fine-grained sediment enters into the network during the flood; reduce the efficiency of these projects and in long time of operation to actually lose its effectiveness. The main objective of this study is the effect of sediment deposited on the variation of infiltration rate by the floodwater spreading. In this study, double rings with triangular surface soil infiltration rate were used and the relevant data were entered into the Excel software. The analysis and comparison of the effects of the floodwater spreading on soil infiltration rate in comparison to control was evaluated using the statistical method of factorial completely randomized design. The effects of floodwater spreading on soil infiltration rate were evaluated using the statistics factorial method in completely design. Duncan mean comparison test was applied to compare rate of infiltration on spreading area with ditches between them. It is necessary to mention that the control values in the first year were compared with the results of reminder years. In general, the analysis of variances show the difference between rates of infiltration in depth of soil is significant at level %5 but the level signiticant for floodwater is %1. There is no significant difference for interaction of these two factors.