Use of Soft Calculations at Estimation and Prediction of Environmental Flow Discharge (Case Study: Khorkhoreh Chay River)

Recently, according to the water crisis, special ecological conditions of Urmia lake and the importance of predicting and estimating the environmental requirement of rivers in the Urmia lake watershed, the present study was carried out in the Zarrinerud river basin. It is noted that the Zarrinerud river supplies the majority of water for urmia lake. This research is presented in two main sections. The first part predicts the monthly flow at the station without data using two intelligent methods including ANFIS and GEP. In the second section, the estimation of environmental flow was done through two methods of FDC shifting and DRM.