Several empirical methods for flood flow rate estimation have been presented. In this study,eight new empirical runoff estimation method including Dredge & Burge, Bourges, Inglis, Faning, Hyderabad, Burkli Ziegler, Cramar and Possenti were calculated in Bakhtegan watershed which is located in Fars province. After studying empirical methods for annual flood flow rate estimation and comparing the...

Fuzzy set theory has been criticized for building on an ill-understood notion, viz., that of graded membership. To address this concern, recent work proposed operational definition which experimental studies have subsequently shown to make accurate predictions regarding people's judgments degrees It is still open question whether analogous positive results can be obtained more complex fuzzy con...