نتایج جستجو برای: basins of karun basin then

تعداد نتایج: 21176987  

2008
Erik P. QUERNER

Flooding in the northern part of The Netherlands has caused serious economic threats to densely populated areas. Therefore a project has been carried out in a pilot area to assess the retention of water in two river basins as a way to reduce flooding. The physically-based groundwater and surface water model SIMGRO was used to model the hydrology of the basins. The model was calibrated using dis...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

Journal: :جغرافیا و مخاطرات محیطی 0
مژگان انتظاری نجف آبادی فاطمه خدادادی اکبر رستمی

. introduction if environmental hazards, including those with atmospheric origin and terrestrial origin cause economic and human life losses for human societies, they would be considered as disasters. terrestrial hazards, which mostly occur as catastrophic, may have economic and human life damages when they occur in a small scale but with high intensity. mass movements are among the most import...

2016
Liu Liu Zongxue Xu Rong Li Youzhi Wang

Climate change is a global issue that draws widespread attention from the international society. As an important component of the climate system, the water cycle is directly affected by climate change. Thus, it is very important to study the influences of climate change on the basin water cycle with respect to maintenance of healthy rivers, sustainable use of water resources, and sustainable so...

2008
J. Smit J.-P. Brun S. Cloetingh Z. Ben-Avraham

[1] Contrary to other examples, like Death Valley, California, and the Sea of Marmara, Turkey, the Dead Sea-type pull-apart basins form within a narrow transform corridor between strike-slip faults that are less than 10 km apart, much smaller than the crustal thickness of 35 km. In this paper we investigate the role of fault zone width versus thickness and rheology on the mechanics of pull-apar...

2016
María-del-Mar Gallardo Pedro Merino Laura Panizo Alberto Salmerón

This paper presents de use of the Spin model checker as the core engine to build Decision Support Systems (DSSs) to control complex river basins during flood situations. Current DSSs in this domain are mostly based on simulators to predict the rainfall and the water flow along the river basin. In this paper, we propose a scheme that integrates simulators in the water domain with additional logi...

Journal: :Molecular phylogenetics and evolution 2004
Michael E Pfrender Justin Hicks Michael Lynch

We examined genetic diversity within- and among-populations of speckled dace (Rhinichthys osculus) in five major drainage systems in the state of Oregon in western North America. Analysis of sequence variation in a 670-bp segment of the mitochondrial cytochrome b gene revealed deep divergence among basins and high genetic diversity within basins. Application of a molecular clock indicated that ...

Small sediment dams are the key structures for controlling sediment flow and improving the course of waterways in watersheds. In Kermanshah province, the efficiency of these structures in sediment accumulation has been less studied and evaluated. This study aimed to investigate the efficiency of these structures in sediment retention and flood control in three watersheds of the province. For th...

Juahir , H., Masthurah , A., Mohd Zanuri , N.B.,

 This study investigates spatial water quality assessment of selected river basins in the three different states in Malaysia. Environmetric techniques namely, cluster analysis (CA), principal component analysis (PCA), and discriminant analysis (DA), were applied to study the spatial variations of the most significant water quality variables in order to determine the origin of pollution sources ...

Journal: :اکو هیدرولوژی 0
مریم آذرخشی استادیار دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه تربت حیدریه سید جواد سعادت پور کارشناسی ارشد آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه تربت حیدریه علیرضا اسلامی استادیار پژوهشکدۀ حفاظت خاک و آبخیزداری کشور، تهران

regional analysis is one of the important methods for estimating the low flow in ungagged regions. investigation of the relations between effective factors of hydrological drought is the most important strategy to contrast and reduction of drought losses. in this study to analyze of low flow, the daily discharge data from 20 gauging stations with 25 years period (1988-2012) in the kashafroud ba...

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