Effect of Ecogeomorphology factors and Season on the quality of Alashtar River

Geomorphologic parameters are the decisive and influencing factors on the quality of water resources, particularly surface waters, such as rivers and lake. Chemical quality of the water can be affected by formation litho logy of the drainage basin, river sediments transported, material and ecological factors, such as human activities, agricultural, industrial and urban activities that combining these items as Ecogeomorphology checked. In this study Impact of influence factor on the Chemical quality of the Aleshtar River in the 2 eststion: Dare tang and Sarabseydali and as well as the impact of season changes in the water quality of the Alashtar River, have been studied. In this study vitro analytical method was used that the water samples taken during the twelve months of the Daretang and Sarab Seydali (91-92 water years) in Aleshtar drainage basin and the geology map (1/100000) and topography map (1/25000). The results showed that variety of geological formations, such as limestone and erodibilit formation in this drainage basin and role of the runoff on the creating and transport of sediment in the Aleshtar River affected the river water quality, But it noting bad the quality of water. One-way analysis of variance showed that the effect of the seasons change on pollution, only affected on parameters of sodium, magnesium, nitrate and nitrite on the 5 percent level is significant and the other parameters shows that the Season change, have no effect on the amount of pollution in the alashtar river.