The Urmia Lake has distinctive nature, hydrodynamic and environmental properties that single out that from the other lakes in the world. Construction of Shahid Kalantari causeway can cause significant effects on natural regime of the lake. It may affect on environmental biology, hydraulic, water circulation regime and … . This paper deals with hydrodynamics of the lake. Two-dimensional s...

In integrated water resources management at the basin level, integrated view of the system and taking into account the interactions between the various components is essential. System dynamic model is a management tools according this approach that in addition to describing complex systems of water resources provide the possibility of user involvement in the development model. This study have b...

asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...

today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...

Compliance with the drought, due to the complex nature of the phenomenon, depends on a variety of social, economic, environmental, infrastructure and management factors, and the development process of villages located in drought conditions also depends on several factors that are caused by drought conditions. The drying of Lake Urmia has also made the necessity and importance of adapting rural ...

the caspian sea contains great resources of oil and gas. the caspian sea is a 700- mile- long body of water in central asia, land located between azerbaijan, iran, kazakhstan, russia and turkmenistan. iran was challenges and opportunities in the caspian region. key question in this thesis includes three section that first question, opportunities of iran in the caspian region, second question ch...