A trading-partnership model for estimating discharge permits in river systems by Ant Colony optimization

1 Graduate Faculty of Environment, University of Tehran, P.O.Box 14155-6135, Tehran, Iran. 2 Department of Civil Engineering, Auburn University, Auburn, AL 36849, United States of America. 3 Department of Industrial Ecology, Academic Center of Education, Culture and Research(ACECR),Sharif University Branch, Tehran, Iran. 4 Faculty of Management and Economics, Science and Research Branch, Islamic Azad University, Tehran Iran.