نتایج جستجو برای: bibi sayyedan river

تعداد نتایج: 83660  

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: :iranian journal of ichthyology 0
asghar abdoli department of biodiversity and ecosystem management, sciences research institute, shahid beheshti university. tehran, iran. mehdi naderi department of ecology, caspian ecology academe, iranian fisheries research organization, sari, iran. hojatolah foroughifard persian gulf and oman sea ecological research institute, bandar abbas, iran. bahram h kiabi department of biology, shahid beheshti university, evin, tehran, iran.

fish species diversity, distribution and abundance were studied in the sardabrud and chalus rivers, in the southern caspian sea basin, during 1992 and 1993 in five and four stations respectively, by monthly collections using electrofishing device. in total, 3200 fish specimens, including 15 species in sardabrud river and 12 species in chalus river, were investigated. the fish comprised of 13 ge...

Journal: :international journal of aquatic biology 0
erick cristofore guimarães laboratório de sistemática e ecologia de organismos aquáticos, centro de ciências agrárias e ambientais, universidade federal do maranhão. campus universitário, ccaa, br-222, km 04, s/n, boa vista, cep 65500-000, chapadinha, ma, brasil. felipe polivanov ottoni laboratório de sistemática e ecologia de organismos aquáticos, centro de ciências agrárias e ambientais, universidade federal do maranhão. campus universitário, ccaa, br-222, km 04, s/n, boa vista, cep 65500-000, chapadinha, ma, brasil. axel makay katz laboratório de sistemática e evolução de peixes teleósteos, departamento de zoologia, instituto de biologia, universidade federal do rio de janeiro. cidade universitária, cep 21994-970. rio de janeiro, rj, brasil. pâmella silva de brito laboratório de sistemática e ecologia de organismos aquáticos, centro de ciências agrárias e ambientais, universidade federal do maranhão. campus universitário, ccaa, br-222, km 04, s/n, boa vista, cep 65500-000, chapadinha, ma, brasil.

the present study reports range extansion of moenkhausia oligolepis to the pindaré river drainage, of the mearim river basin, and itapecuru river basin, maranhão state, northeastern brazil. this species was previously known only from venezuela, guianas, and the amazon river basins. in addition, we present some meristic and morphometric data of the specimens herein examined and discuss on its di...

Journal: :Chemosphere 2007
M K So Y Miyake W Y Yeung Y M Ho S Taniyasu P Rostkowski N Yamashita B S Zhou X J Shi J X Wang J P Giesy H Yu P K S Lam

A total of 14 perfluorinated compounds (PFCs) were quantified in river water samples collected from tributaries of the Pearl River (Guangzhou Province, south China) and the Yangtze River (central China). Among the PFCs analyzed, perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were the two compounds with the highest concentrations. PFOS concentrations ranged from 0.90 to 99 ng...

Daud Siti Khalijah Siraj Siti Shapor A. Javanmard H. A. Abdolhay, M. Pourkazemi S. Rezvani Gilkolahi

  Mahisefid is the most popular fish in Iran with the highest economic value. The analysis of mitochondrial DNA has been extensively used as a marker for population genetic studies and is a powerful tool in studies of gene flow and evolutionary biology. Two hundred ninety four samples were collected from Sefid Rud River (100), Lamir River (98), Shir Rud River (48) and Tajan River (48) during s...

Journal: Desert 2017

Fresh Water Rivers are one of the most important aquatic ecosystems in arid and semi-arid regions of Iran in point of biodiversity and drinking water views. Damghanroud River is one of these rivers at Semnan province that during past years has been threatened by drought and anthropogenic pollutions. This river supplies some parts of drinking water of Damghan city and some vicinity villages. The...

Varkesh-Chai River with approximately 69 kilometer and north-south trend, in one of the main and permanent rivers of Tabriz city, That 10 villages with worn out texture have established in its main bed. Field studies show that, villages’development has been without knowing the rules governing hydraulic behavior, prediction of river hydrological behavior, and no respecting the main bed of river,...

2017
Nianqiang Zhang Na Li Jing Wang Sheng Chen Shaowei Qiu

Considering characteristics of high river density, special underlying surface in plain river network region, and municipal drainage system function, river network drainage unit model is proposed, which is defined as a region surrounded by main river or embankment. Flood storage variety and control projects regulation of small rivers in each unit is simulated. With drainage catchment as an objec...

2008
J. Brink

Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Major environmental stressors of boreal and sub-arctic rivers are hydrological changes and global warming and both factors will significantly influence the future evolution of the river chemistry in high latitudes. We tested the hypothesis...

2005
Efrat Farber Avner Vengosh Ittai Gavrieli Amer Marie Thomas D. Bullen Bernhard Mayer Ran Holtzman Michal Segal Uri Shavit

Recent geochemical and hydrological findings show that the water quality of the base flow of the Lower Jordan River, between the Sea of Galilee and the Dead Sea, is dependent upon the ratio between surface water flow and groundwater discharge. Using water quality data, mass-balance calculations, and actual flow-rate measurements, possible management scenarios for the Lower Jordan River and thei...

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