Investigation of Flood Spreading Effects on Soil Infiltration Case Study in Mousian Region, Province Ilam

Soil properties can influence flood quality and have an important role on them success of flood spreading systems, because developing of flood spreading schemes in the unsuitable area form viewpoint of the soil and flood qualities may lead to desertification of such aria. Acceptance of the fact that flood spreading cause changes in soil characteristics. These changes can contain wide ranges of soil characteristics such as sand, silt, clay, gravel, and saturation percentage, TNV, Ca, Mg, Na, Infiltration, SAR and ESP. Therefore this investigation was conducted for detection of infiltration and influenced soil physical and chemical in flood spreading area of Mousian plain in southern Ilam. Sampling was based on systematic-randomized method from depths of 0-25cm; 25-50cm and 50-75cm in control, first, second and third bonds. Data analysis of variance was done. Mean comparison was based on Duncan’s Multiple Test. Results indicated that silt, clay, Ca, Na, saturation percentage and SAR in flood spreading area compared to control increased and infiltration, sand and gravel decreased. Soil texture in surface depth of control site was loamy sand and in flood spreading site was converted to sandy loam. Also, results indicated that bulk density in flood spreading site compared with control decreased. So, concluded that by entrance of flood, soil physical characteristics were changed.