Department of Water Engineering;
Kermanshah Branch;
Islamic Azad University;
Kermanshah 67146;
Iran;
Department of Civil Engineering;
Razi University;
Kermanshah 67146;
Iran;
Environmental Research Center;
Razi University;
Kermanshah 67146;
Iran;
180°bend; Submerged; vanes; Scour; hole; volume; Gene; expression; programming; Partial; derivative; sensitivity; analysis;