نتایج جستجو برای: River basins

تعداد نتایج: 92307  

2014
D Vanham

This work quantifies the agricultural water footprint (WF) of production (WFprod, agr) and consumption (WFcons, agr) and the resulting net virtual water import (netVWi, agr) of 365 European river basins for a reference period (REF, 1996–2005) and two diet scenarios (a healthy diet based upon food-based dietary guidelines (HEALTHY) and a vegetarian (VEG) diet). In addition to total (tot) amounts...

ژورنال: طلوع بهداشت یزد 2016
سلطانی‌نژاد, یاسر, مصداقی نیا, علیرضا, ملکوتیان, محمد,

Introduction: Heavy metals are regarded as toxic stable elements in the environment that with the entry into water sources, finally it enters into the biological cycle of life and develops some adverse effects. Therefore, the present study aimed to determine the concentration of chromium and arsenic heavy metals in the river basins of Baft and Ravar dams. Methods: This descriptive cross-sect...

Journal: :iranian journal of ichthyology 0
brian w coad research scientist, ichthyology section, canadian museum of nature, ottawa, canada.

the systematics, morphology, distribution, biology, economic importance and conservation of the spiny eel ( mastacembelus mastacembelus ) of iran are described, the species is illustrated, and a bibliography on this fish is provided. the single species is distributed in southern iranian basins, including karkheh, karun, jarrahi and helleh river basins, mostly part of the tigris river and persia...

Journal: :iranian journal of ichthyology 0
arash jouladeh roudbar sari agricultural sciences and natural resources university hamid reza esmaeili department of biology, college of sciences, shiraz university, shiraz, iran. ali gholamifard razi university rasoul zamanian shiraz university saber vatandoust department of fisheries, babol branch islamic azad university, babol, iran.

distribution of the genus chondrostoma in iran, which is mostly known from the caspian sea, tigris river, kor river and esfahan basins was mapped. the kura nase, chondrostoma cyri is reported from armenia, georgia and iran and it is found in the streams and rivers draining to the western coast of the caspian sea from the kuma river in the north southward to the kura and aras river basins in the...

2011
Naférima Koné Jérémy Bouyer Sophie Ravel Marc J. B. Vreysen Kouadjo T. Domagni Sandrine Causse Philippe Solano Thierry de Meeûs

BACKGROUND African animal trypanosomosis is a major obstacle to the development of more efficient and sustainable livestock production systems in West Africa. Riverine tsetse species such as Glossina palpalis gambiensis Vanderplank and Glossina tachinoides Westwood are the major vectors. A wide variety of control tactics is available to manage these vectors, but their removal will in most cases...

2004
Christopher Potter Pusheng Zhang Steven Klooster Vanessa Genovese Shashi Shekhar Vipin Kumar

Long-term (20 yr) river discharge records from 30 of the world’s largest river basins have been used to characterize surface hydrologic flows in relation to net precipitation inputs, ocean climate teleconnections, and human land/water use patterns. This groundwork study is presented as a precedent to distributed simulation modeling of surface hydrologic flows in large river basins. Correlation ...

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: :Brazilian journal of biology = Revista brasleira de biologia 2007
L M Gomiero F M S Braga

Fish reproductions were studied in two river basins (Corumbataí and Jacaré-Pepira basins) in the State of São Paulo, southeastern Brazil. In the Corumbataí basin, four sites were sampled: Cabeça River, Lapa Stream, Passa-Cinco River, and Corumbataí River; in the Jacaré-Pepira basin, three sites were sampled: Tamanduá Stream, Jacaré-Pepira River, and Agua Branca Stream. A total of 12 bimonthly s...

Journal: :Science 2014
Sean D Willett Scott W McCoy J Taylor Perron Liran Goren Chia-Yu Chen

River networks evolve as migrating drainage divides reshape river basins and change network topology by capture of river channels. We demonstrate that a characteristic metric of river network geometry gauges the horizontal motion of drainage divides. Assessing this metric throughout a landscape maps the dynamic states of entire river networks, revealing diverse conditions: Drainage divides in t...

2009
Marloes H.N. Bakker

While transboundary flood events have become more frequent on a global scale the past two decades, they appear to be overlooked in the international river basin (IRB) cooperation and management arena. The present study therefore combined geopolitical measures with biophysical and socioeconomic variables in an attempt to identify the IRBs with adequate institutional capacity for management of tr...

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