نتایج جستجو برای: bed rivers
تعداد نتایج: 67553 فیلتر نتایج به سال:
ABSTRACT Fine sediment stored in the gravel bed is an important component of river systems. Current field protocols usually allow evaluation silt–clay fraction fine stocks only and neglect sand fraction. This study proposes a new protocol to quantify stocks, including inside matrix. were sampled within patches 0.30 m × on dry surface, separating surface layer subsurface layer. The grain‐size di...
The prevalence of benthic proliferations of the anatoxin-producing cyanobacterium Phormidium are increasing in cobble-bed rivers worldwide. Studies to date have shown high spatial and temporal variability in anatoxin concentrations among mats. In this study we determined anatoxin quotas (toxins per cell) in field samples and compared these results to the conventionally-used concentrations (asse...
The temperature of water in lakes, rivers and streams has a fundamental influence on aquatic organisms, ecological processes and the potency of many pollutants. We expect water temperature in the UK to increase under projected climate change, but rates and spatial variation of change remain unclear for inland waters. It is also unclear how we might manage land and river flow regimes to modify r...
Rivers are the natural flow of surface waters that flow in a certain bed seasonal or permanently. Rivers include a vast range of narrow waterways and with mountainous high steep to low steep and wide beds flowing in plains. However, rivers have had an effective role in urban development and human civilization, therefore, identification of flood prone areas and flood part in the potent lower fie...
Abstract The period 1965–2000 saw a sustained increase in research and publications on fluvial processes landforms. trend towards generalization and/or mechanistic understanding, rather than site-specific history, continued. Research was multidisciplinary, with important contributions from hydraulic engineers, geologists physical geographers experimental theoretical approaches as well geomorpho...
[This corrects the article DOI: 10.1186/s40064-016-2714-3.].
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