The Estimating of Discharge by Physiographic Factors in East of Gilan Basins, Iran-South Western of Caspian Sea

The greatest civilization has located in marginal rivers and it has developed, the condition of Iran climate, water is an important in environmental development in recent years control of nature is for development of agricultural, obtain of industrial and drinking water. The aim of paper is recognition of relationship between discharges and physiographic factors in east of Gilan (Lahejan- Chaboksar) with uses of 20 years data of statically period (1986-2006). The research method uses of correlation and multi regressions in selected basins between discharge and physiographic fact. The result of paper has shown that between discharge and physiographic factors has reliability relationship and between discharge and 5 variables of physiographic factors is high relationship (p-value <0/05) and the curve of comparative between fore cast discharge and 5 factors model is very near and sure able .In the end of paper submitted of monthly and yearly equation too.