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۱Short–term Flood Mitigation Measures of Karun River System
نویسنده(ها): ، ،
اطلاعات انتشار: اولین کنفرانس بین المللی و سومین کنفرانس ملی سد و نیروگاههای برق آبی، سال
تعداد صفحات: ۱۵
Karun river basin as the biggest water course of Iran, has accommodated a large number of hydro projects including reservoirs, hydropower plants (HPPs), water convey systems, and irrigation networks in south west of the country. The region is vulnerable to flood the damages was remarkable in under construction dam sites in last decade. Although there is master plan for flood mitigation measures, it needs long time and sufficient budget to implement all elements of the master plan in the basin. However, structural measures have traditionally been used as one of the measures in local areas and short term structural and nonstructural approaches have been pursued to reduce vulnerability of the region after extreme floods of 2005 and 2006. This paper discusses the historical flood events of the basin and introduces short term solutions which implemented in the basin recently. Basically the short term solution consists of resistible cofferdams in under construction dam sites in along with early flood forecasting system (EFFS) and emergency action plan (EAP). In this regard, rehabilitated diversion systems and new projects cofferdams have changed to armored soil or roller compact concrete (RCC) after 2005. Implemented EFFS contains regional numerical weather forecast system, rainfall–runoff models, reservoir flood control simulation, flood routing and two dimensional inundation models. Maximum lead time of forecast is about 4 to 5 days depends on the location of the sites, nevertheless, the time is sufficient to evacuate the damage centers before flood occurrence. In addition, EAP of dam break and extreme flood events has been identified after determining potential damages and hazard zones based on inundation areas and depth, flow velocity, and properties of the region. EAP includes guidelines of warning for different hazards and accessing to safe zones as well as planning maps of surviving service.<\div>

۲Climate Change Impacts on Hydropower Development Projects in Karkheh River Basin
نویسنده(ها): ، ،
اطلاعات انتشار: اولین کنفرانس بین المللی و سومین کنفرانس ملی سد و نیروگاههای برق آبی، سال
تعداد صفحات: ۱۳
According to climate change, development of future hydropower generation is becoming more challenging. Clime change influences on hydrological cycle directly. In this study the sensitivity of the Karkheh River Basin to potential climate change is investigated by simulating basin streamflow response and hydropower production under different climate change scenarios. In order to examine these potential effects, outputs of the simulation of basin streamflow response with two general circulation models outputs under two greenhouse–gas emissions scenarios for three time horizons. These scenarios were applied into an integrated water resources management model. The results show that annual and seasonal hydropower production indicators in mostscenarios will fall because of drier hydrologic conditions. These reductions will be more serious in long term planning (2070’s). These failures indicate that operation rules curves which were developed under historical data in Karkheh River Basin integrated water resources planning would not be appreciated for climate change condition. Therefore, the adaptation of reservoir operation rules for each dam should be accomplished under various climate change scenarios.<\div>
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