نتایج جستجو برای: river discharge

تعداد نتایج: 180125  

Journal: :اکو هیدرولوژی 0
امین بابایی مقدم دانشجوی کارشناسی ارشد آبیاری و زهکشی، مهندسی آب، دانشگاه گیلان محمدرضا خالدیان دانشیار، گروه مهندسی آب دانشکدۀ علوم کشاورزی، دانشگاه گیلان علی شاهنظری دانشیار، گروه مهندسی آب دانشگاه علوم کشاورزی و منابع طبیعی ساری محمدرضا مرتضی پور کارشناس ارشد شرکت سهامی آب منطقه‏ ای گیلان

the aim of this study was the analysis of discharge variations of two rivers i.e. qezelozan and shahroud, regarding the sustainable rice production in guilan province. to achieve this purpose four trend analysis tests including sen, mann-kendall, linear regression and spearman were used. in this study, river discharge data of 49 and 37 years for respectively qezelozan and shahroud rivers were u...

2002
Aiguo Dai Kevin E. Trenberth

New estimates of freshwater discharge from continents were derived using stream-flow records from the world's largest 921 rivers, supplemented with estimates of discharge from unmonitored areas based on the ratios of runoff and drainage area between the unmonitored and monitored regions. The farthest downstream river-flow data were extrapolated to the river mouth using river transport model sim...

2007
Konstantinos M. Andreadis Elizabeth A. Clark Dennis P. Lettenmaier Douglas E. Alsdorf

[1] Surface water elevation profiles for a reach of the Ohio River were produced by the Jet Propulsion Laboratory Instrument Simulator to represent satellite measurements representative of those that would be observed by awide swath altimeter being considered jointly by U.S. and European space agencies. The Ensemble Kalman filter with a river hydrodynamics model as its dynamical core was used t...

Journal: :Journal of environmental biology 2009
Smita Kabir Mulani M B Mule S U Patil

The present investigation deals with the zooplanktons together with water quality of Panchganga river, in Kolhapur city, Maharashtra. This investigation was undertaken fora period of one year. The river Panchganga is a highly contaminated downstream with untreated sewage and industrial effluents, while flowing through Kolhapur city. The high value of CO2, BOD, COD, phosphate, nitrate, Zn, Fe, C...

2015
Kevin McGuigan

A flexible mesh hydrodynamic model was developed to simulate flooding of the LaHave River watershed in Nova Scotia, Canada, from the combined effects of fluvial discharge and ocean tide and surge conditions. The analysis incorporated high-resolution lidar elevation data, bathymetric river and coastal chart data, and river cross-section information. These data were merged to generate a seamless ...

2014
S. Yoshikawa

Changes in river discharge due to human activities and climate change would affect the sustainability of freshwater ecosystems. To globally assess how changes in river discharge will affect the future status of freshwater ecosystems, global-scale hydrological simulations need to be connected with a model to estimate the durability of freshwater ecosystems. However, the development of this speci...

Environmental flow of the Beshar River was evaluated using Tennant's hydrological method, the comparison of the depth and speed of the water in the transverse sections of the river, and the needs of indicator fish species in different stages of the life cycle. Field samplings were conducted in October and January 2021 to monitor the status of fishes in the Beshar River and to collect cross-sect...

ژورنال: علوم آب و خاک 2020

Water supply at a desired rate at any time to meet the water requirements regardless of river discharge must be considered in the general design of intakes provided that the needs do not exceed the river flow. Due to the lack of necessary information in this field and the importance of sediment transport to the lateral intakes at river bends, this study aimed at understanding the mechanism of t...

2007
Jonathan A. Warrick Paul M. DiGiacomo Stephen B. Weisberg Nikolay P. Nezlin Katie L. Farnsworth

Stormwater river plumes are important vectors of marine contaminants and pathogens in the Southern California Bight. Here we report the results of a multi-institution investigation of the river plumes across eight major river systems of southern California. We used in situ water samples from multi-day cruises in combination with MODIS satellite remote sensing, buoy meteorological observations, ...

2011
L. M. Vale J. M. Dias

Vale, L. M. and Dias, J. M., 2011. The effect of tidal regime and river flow on the hydrodynamics and salinity structure of the Lima Estuary: Use of a numerical model to assist on estuary classification, SI 64 (Proceedings of the 11th International Coastal Symposium), 1604 – 1608. Szczecin, Poland, ISSN 0749-0208 The purpose of this work is to characterize the hydrodynamics of the Lima estuary ...

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