نتایج جستجو برای: suspended sediment yield

تعداد نتایج: 248054  

Journal: :Izvestiya Rossiiskoi akademii nauk. Seriya geograficheskaya 2019

Journal: Desert 2015

Modeling of stream flow–suspended sediment relationship is one of the most studied topics in hydrology due to itsessential application to water resources management. Recently, artificial intelligence has gained much popularity owing toits application in calibrating the nonlinear relationships inherent in the stream flow–suspended sediment relationship. Thisstudy made us of adaptive neuro-fuzzy ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی عمران 1385

بررسی مسایل مربوط به آبشستگی و رسوبگذاری در مسیر جریان رودخانه ها و اطراف سازه های هیدرولیکی از جمله پدیده های پیچیده و مهم هیدرولیکی است. تحلیل جریان و انتقال رسوب در کانالهای آبرفتی به صورت سه بعدی دقیق تر است، اما مدلهای سه بعدی مخصوصاً برای رودخانه های با طول زیاد به زمان زیادی برای اجرا نیاز دارد. در شرایطی که عرض جریان در مقابل عمق زیاد باشد، شتاب عمودی آب در مقابل شتاب ثقل قابل صرفنظر کرد...

Extended abstract 1- Introduction The phenomena of erosion, sediment transport, and sedimentations have tremendously destructive effects on the environment and hydraulics structures. In general, the sediment transportation depends on river discharges, but the proposed equations inherited serious errors.  The estimation of suspended sediment load (SSL) is one of the most important factors in r...

2016
M. Luz Rodríguez-Blanco Ricardo Arias Joao Pedro Nunes Jan Jacob Keizer Jochen Aberle

Soil losses and the subsequent sediment delivery constitute significant environmental threats. Climate change is likely to have an impact on the availability of water and therefore on sediment yield in catchments. In this context, quantifying the sediment response to an increased atmospheric CO2 concentration and climate change is of utmost importance to the proper management of rural catchment...

1996
xu JIONGXIN

Abstract A study on the suspended sediment transportation downstream from the Danjiangkou Reservoir in China has shown that the dynamics of suspended sediment grain size are complicated. During the period when the reservoir was used for flood retention, the suspended sediment median size decreased gradually; after entering the period when the reservoir was used for water storage, the median siz...

Journal: :desert 2015
mohammad tahmoures ali reza moghadamnia mohsen naghiloo

modeling of stream flow–suspended sediment relationship is one of the most studied topics in hydrology due to itsessential application to water resources management. recently, artificial intelligence has gained much popularity owing toits application in calibrating the nonlinear relationships inherent in the stream flow–suspended sediment relationship. thisstudy made us of adaptive neuro-fuzzy ...

2010
Ivana UJEVIĆ Zorana KLJAKOVIĆ-GAŠPIĆ Danijela BOGNER

Seasonal and spatial distributions of cadmium (Cd) and organic matter (OM) in sediment and suspended matter of the semi-enclosed Kaštela Bay (middle Adriatic Sea) were investigated at four stations during a one year period (April 2000 April 2001). Samples of surface sediment and suspended matter were collected monthly. One sediment core was sampled at every station at the beginning of the sampl...

2017
Michael Müller Giovanni De Cesare Anton J. Schleiss

In laboratory experiments, the influence of inflow and outflow sequences on the behavior of fine sediment was investigated. The experimental set-up consisted of two interconnected rectangular basins, between which water was moved back and forth. Suspended sediment concentration in the main basin as well as the sediment exchange rates were derived from turbidity measurements.The suspended sedime...

2008
JIM BOGEN

Climate change scenarios indicate that most glaciers in Norway will have disappeared by the year 2100. As the downstream river reaches are often completely dominated by glacial sediments, large environmental changes are expected. This paper discusses and reviews sediment transport studies in order to deduce the impact of climate change on the sediment delivery of glaciers. Sediment monitoring p...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید