نتایج جستجو برای: urmia lake sediments

تعداد نتایج: 69393  

2014
Mo Chen Tian-Ran Ye Lee R. Krumholz He-Long Jiang

Cyanobacterial blooms frequently occur in freshwater lakes, subsequently, substantial amounts of decaying cyanobacterial bloom biomass (CBB) settles onto the lake sediments where anaerobic mineralization reactions prevail. Coupled Fe/S cycling processes can influence the mobilization of phosphorus (P) in sediments, with high releases often resulting in eutrophication. To better understand eutro...

1999

Residual petroleum hydrocarbons and polychlorinated biphenyls (PCBs) are frequently found together at contamination sites. Intrinsic reductive dechlorination of PCBs at these sites is highly variable. Sediments of Silver Lake (MA), which contain ∼6.2% petroleum hydrocarbons, did not support PCB dechlorination in laboratory assays. Removal of petroleum components from Silver Lake sediments by so...

2002
STEVEN C. CHAPRA RAYMOND P. CANALE

Abstraet--A budget model is developed to predict the long-term response of a lake to changes in its phosphorus loading. This model computes total phosphorus and hypolimnetic oxygen concentrations, taking sediment-water interactions into account. The lake is treated as two segments: the water and a surface sediment layer. A total phosphorus budget for the water accounts for inputs due to externa...

A. Eimanifar , F. Mohebbi , H. Negarestan , L. Esmaeili Dahesht , R. Ahmadi ,

   Urmia Lake is one of the two large hypersaline lakes in the world which have Artemia. It is located in northwest of Iran. Due to a decrease in water inflow and volume, the salinity of Urmia Lake has reached to more than 300 g.l-1 since 2001. The increased salinity has greatly influenced biological aspects of the lake, and caused the lake undergoes at critical conduction. The aim of the prese...

Journal: :international journal of environmental research 2012
s. farzin p. ifaei n. farzin y. hassanzadeh m.t. aalami

chaos theory discusses unstable and non-periodic behavior of non-linear fluctuating dynamicsystems. since evaporation level variations of lakes have a dynamic identity, chaos theory can have a uniquerole in collecting data of these variations. therefore it is an important and challenging problem in the field ofplanning and qualitative and quantitative management of urmia lake to verify whether ...

2014
Erich Draganits Susanne Gier Christoph Janda Bodo Bookhagen Bernhard Grasemann

300 MW Baspa II is India’s largest private hydroelectric facility, located at the Baspa River which is an important left-hand tributary to the Sutlej River in the NW Himalaya (India). In this valley the Sangla palaeo-lake has been dammed around 8200 yr BP behind a rock-avalanche dam and Baspa II is located exactly on top of this palaeo-lake. This special location represents a very rare possibil...

2015
Asghar Tofighi

1. Assistant Professor in Exercise Physiology, Department of Exercise Physiology, Faculty of Physical Educa on and Sport Science, Urmia University, Urmia, Iran. 2. PhD Student in Exercise Physiology, Department of Exercise Physiology, Faculty of Physical Educa on and Sport Science, Birjand University, Birjand, Iran. 3. M.A in Exercise Physiology, Department of Exercise Physiology, Faculty of Ph...

ژورنال: اکوبیولوژی تالاب 2022
Asalpisheh, Zahra, Atashbar Kangarloei , Behrooz, Haghi Vayghan, Ali , Imani, Ahmad , Teymuri Nomandani, Sudabeh ,

Phytoplankton is one of the main components of wetlands, which plays a vital role in providing nutrients, oxygen for other organisms, stabilizing nitrogen and carbon dioxide. In the meantime, the current status of Lake Urmia highlights the need to conserve and protect wetlands related to these ecosystems and their living and non-living components. Therefore, this study was conducted to assist i...

ژورنال: کواترنری ایران 2018
Wigand, Petre Ernest,

During the Holocene Lake Orūmiye has been subjected to significant changes in climate. These have impacted the surround vegetation and runoff, and erosion rates of the surrounding basin. Shifts in seasonal rainfall from winter to summer dominated patterns have resulted in dramatic changes in the Orūmiye Basin’s vegetation cover from grass to shrub dominated communities. The degree of ground sur...

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