نتایج جستجو برای: zarivar lake

تعداد نتایج: 42293  

Journal: :international journal of environmental research 0
l. yang river and coastal environment research center, chinese research academy of environmental sciences, beijing 100012, p. r. china k. lei river and coastal environment research center, chinese research academy of environmental sciences, beijing 100012, p. r. china w. yan institute of geographic sciences and natural resources research, chinese academy of sciencesÿ11a datun road, beijing, 100101, p.r. china a. mohseni-bandpei health faculty, shahid beheshti university of medical sciences, tehran, iran

this study investigated the impact of internal nitrogen and phosphorus loading on water qualityof lake chaohu, china. results showed that the overall mean concentration of tn and tp in lake water was1.09±0.84 and 0.15±0.84 (sd) mg/l, respectively, indicating lake chaohu was highly eutrophic during thestudy period. mean benthic flux of nh4 +, no3 -, and po4 3- were 3.56±1.52 mg n/m2/d, -0.14±0.4...

Journal: :international journal of aquatic biology 0
shirkou jaafari faculty of natural resources, university of tehran, karaj, iran. afshin alizadeh shabani faculty of natural resources, university of tehran, karaj, iran. afshin danehkar faculty of natural resources, university of tehran, karaj, iran.

the study on water level fluctuation in the urmia lake has become of a great importance in recent years. this is due to the importance of the position of this lake as a natural heritage at an international level. the water level decrease at the urmia lake during the recent years has made it necessary to address the matter more than before. investigation and assessment of changes in the lake is ...

2012
Ibrahim Nourein Mohammed David G. Tarboton

[1] The Great Salt Lake is a closed basin lake in which level and volume fluctuate due to differences between inflows and outflows. The only outflow is evaporation, which depends directly on lake area and salinity, both of which depend on lake volume. The lake’s level, volume, and area adjust to balance, on average, precipitation and streamflow inflows by evaporation. In this paper, we examine ...

2003
HAROLD L. KINCAID

—The Green Lake, Wisconsin, strain of lake trout Salvelinus namaycush was discontinued as a hatchery brood stock in 1976 after Lake Michigan was stocked with the 1975 yearclass. In 1982, a decision was made to restore the Green Lake strain as a production brood stock. Five groups were produced by spawning marked fish that were survivors from the 1976 stocking of southern Lake Michigan. A sixth ...

2017
Jeffery R. Stone Sherilyn C. Fritz Jeffery Robert Stone

Three-dimensional modeling of lake morphometry enables the calculation of lake volume, planar surface area, and basin surface area, which are critical components of a conceptual model of how planktic and benthic habitat areas change with changing lake level. We have applied three-dimensional modeling to Foy Lake, Montana, and compared model results of changing ratios of planktic and benthic hab...

2005
T. A. Jantunen

Probabilistic Bayesian networks have been used as decision making tools mainly in medicine and economics, but recently they have also been utilized in natural resource management. In this study a Bayesian model is built as a decisionmaking tool for fisheries management in the Tonle Sap Lake in Cambodia. As the largest freshwater fishery in the world, the Tonle Sap has enormous importance to bot...

Journal: :Journal of environmental quality 2013
Zongwei Ma Kai Chen Zengwei Yuan Jun Bi Lei Huang

An overall and comparative ecological risk assessment of heavy metal pollution (including Cu, Zn, Pb, Cd, Hg, Cr, As, and Ni) in surface sediments was conducted for six major shallow freshwater lakes (Taihu Lake, Chaohu Lake, Nansihu Lake, Dongting Lake, Poyang Lake, and Hongze Lake) in China. A spatial database with 339 sediment samples was created through an extensive literature survey. Conse...

2014
John Kriesel Bryce Moulton Cammie Barrus Michael Vaughn Robert Crisp

John Kriesel, MD; Bryce Moulton; Cammie Barrus NP; Michael Vaughn, BS; Robert Crisp, PhD; Infectious Diseases, University of Utah School of Medicine, Salt Lake City, UT; Infectious Diseases, University of Utah, Salt Lake City, UT; Salt Lake Valley Health Department, Salt Lake City, UT; Biofire Diagnostics, LLC, Salt Lake City, UT; Research and Development/Biochemistry, Biofire Diagnostics, LLC,...

Journal: Pollution 2019

Present study aims to unravel the hydro geochemical interaction of sediment and water of Saheb bandh lake, West Bengal, India with an emphasis on heavy metal assessment. Lake water belongs to Ca2+–HCO3− type hydro geochemical faces and water-rock interaction primarily controls the lake water chemistry. Based on different Hydro chemical characteristics it is suggested that silicate weathering is...

رائینی سرجاز, محمود, شفیعی, مریم,

In recent years due to increase of drought frequency, lakes water levels, in arid and semi-arid regions of the Iran, have dropped significantly. Therefore, in addition to ecosystem degradations, drought challenges socio-economic sectors as well. The purpose of this study was to evaluate the water level fluctuations of Parishan Lake during the wet and dry periods, and the impact of drought indic...

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