نتایج جستجو برای: beshar river

تعداد نتایج: 83554  

2016
Katarzyna Glińska-Lewczuk Iwona Gołaś Józef Koc Anna Gotkowska-Płachta Monika Harnisz Andrzej Rochwerger

The effects of five towns on river water pollution were examined along the Łyna River (southern watershed of the Baltic Sea, northern Poland). The relationships among the spatially derived indicators of urbanization, environmental variables, and physico-chemical and microbiological data (heterotrophic plate count at 22 and 37 °C, and fecal coli) obtained from longitudinal river profiling have b...

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ژورنال: پژوهش های فرسایش محیطی 2015
Alizadeh, shahnaz, Goorabi, Abolghasem, Yamani, Mojtaba,

Predictions of total and even partial changes in rivers patterns are as the most essential issues related to rivers geomorphology. In this regarding, a lot of researches have been done by geomorphologists. This research has explored Kordan River aqueduct morphology changes in bights areas of Afkaneh cone surface. Kordan river is the one which has been affected by various factors and has changed...

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ژورنال: تحقیق در علوم شیلاتی 2021
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 ...

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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...

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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...

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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...

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Journal: Iranian J. of Fisheries Science 2012
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...

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Journal: Desert 2017
A. Afzali, A. Malekian, A. Taya, K. Rezaei Tavabe,

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...

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ژورنال: تحقیقات کاربردی علوم جغرافیایی 2019
hejazi, Asdollah, khodaie geshlag, fatemeh, khodaie geshlag, leila,

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,...

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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...

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