نتایج جستجو برای: large river

تعداد نتایج: 1105254  

2015
Chunping Ren Lijing Wang Binghui Zheng Andreas Holbach Mingxi Jiang

Understanding the spatial and temporal variation of nutrient concentrations, loads, and their distribution from upstream tributaries is important for the management of large lakes and reservoirs. The Three Gorges Dam was built on the Yangtze River in China, the world's third longest river, and impounded the famous Three Gorges Reservoir (TGR). In this study, we analyzed total nitrogen (TN) conc...

Journal: :Restoration Ecology 2021

The time‐based perspective of river‐floodplain processes plays a key role in understanding its evolution until present situation and guiding process‐based river restoration. However, despite the wide range approaches to eco‐hydromorphological characterization, analysis fluvial dynamics their drivers under temporal requires more investigation. For study, historical has been undertaken study sect...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2012
Rolf Aalto Charles A Nittrouer

Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins-insight that is enhanced by accurate geochronology. The natural fallout radionuclide (210)Pb, often employed to date lacustrine and marine sediments, has previously been used to determine f...

Journal: :Ecological applications : a publication of the Ecological Society of America 2006
Adam S Birken David J Cooper

Significant ecological, hydrologic, and geomorphic changes have occurred during the 20th century along many large floodplain rivers in the American Southwest. Native Populus forests have declined, while the exotic Eurasian shrub, Tamarix, has proliferated and now dominates most floodplain ecosystems. Photographs from late 19th and early 20th centuries illustrate wide river channels with largely...

2014
Charles B Yackulic Michael D Yard Josh Korman David R Haverbeke

While the ecology and evolution of partial migratory systems (defined broadly to include skip spawning) have been well studied, we are only beginning to understand how partial migratory populations are responding to ongoing environmental change. Environmental change can lead to differences in the fitness of residents and migrants, which could eventually lead to changes in the frequency of the s...

Journal: :Environmental Modelling and Software 2014
Frank Liu Ben R. Hodges

This paper describes the Simulation Program for River Networks (SPRINT) that is proposed as a tool for studying Continental River Dynamics (CRD), the solution of physics-based equations for large-scale river networks. Existing coupled hydrologic/hydraulic models have been unable to solve the full Saint-Venant equations for river networks larger than O(10) elements, but continental scales requir...

2016
Marko Keskinen Olli Varis Arjen Y. Hoekstra

The water-energy-food nexus (“nexus”) is promoted as an approach to look at the linkages between water, energy and food. The articles of Water’s Special Issue “Water-Energy-Food Nexus in Large Asian River Basins” look at the applicability of the nexus approach in different regions and rivers basins in Asia. The articles provide practical examples of the various roles and importance of water-ene...

Hydrological components in a river basin can get adversely affected by climate change in coming future. Manipur River basin lies in the extreme northeast region of India nestled in the lesser Himalayan ranges and it is under severe pressure from anthropogenic and natural factors. Basin is un-gauged as it lies in remote location and suffering from large data scarcity. This paper explores the imp...

E Zubcov , G Plavan , M Nicoara , N Bagrin, N Borodin, O Jurminscaia , S.A Strungaru,

Prut River is very important for sustaining the biodiversity and economical activities in its area for Romania, Ukraine and Republic of Moldova. Anthropogenic activities are present everywhere especially near a big water flow because they need a close water resource. The major problems remain the impact and a possible risk produced as a negative result in these activities (agriculture close to ...

2017
Dennis Tappe José Vicente Pérez-Girón Sergio Gómez-Medina Stephan Günther César Muñoz-Fontela Jonas Schmidt-Chanasit

Ross River virus, a mosquitoborne alphavirus, causes epidemic polyarthritis in Australia and the Pacific region. We analyzed serum cytokine, chemokine, and growth factor levels in travelers returning to Germany from Australia. Serum samples showed elevated concentrations in the acute phase of the illness and, more pronounced, in the long-lasting convalescent phase.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید