Upper Gotvand dam is constructed on the Karun River located in the south west of Iran. In this paper, 2D and 3D models of the dam together with the foundation and abutments were constructed and several seepage analyses were carried out. Then the gypsum veins scattered throughout the foundation ground and also the seepage pattern were included in the models, hence the dissolution law of gypsum, ...

khuzestan province is considered as one of iran's agricultural hubs, food production andsupply make it necessary to use water and soil resources to the optimum potential.agricultural drainage waters, with their high volume and decentralized nature, are the mainsource of return flow to the karun river. these sources include pesticides and nutrients(nitrate, phosphate) and have high pollutio...

Introduction: Colloidal materials and suspended solids cause turbidity in water. To remove turbidity, clarification method is used that includes processes of coagulation, flocculation, and sedimentation. Due to the long duration of coagulation process, coagulant aids are applied. Despite the favorable efficiency of synthetic polyelectrolytes as a coagulant aid, due to their harmful effects on h...