What is a Guyot Quizlet?
Guyot. Large, flat-topped seamount formed by the erosion of an island volcano above sea level.
Where is the ocean floor deepest?
What is a turbidity current quizlet?
A high-velocity current with gentle gradients. It is denser than seawater because of the sediment it contains. What is a Turbidity Current? A greywacke upward fining deposit deposited by a turbidity stream.
What exactly is a turbidity current?
A turbidity current refers to a downhill flow of water that is caused by high sediment concentrations and increased density. Turbidity currents can alter the physical structure of the seafloor by eroding large portions and creating underwater canyons.
What is a Tablemount?
In marine geology, a guyot (pronounced /gi:’joU/), also known as a tablemount, is an isolated underwater volcanic mountain (seamount) with a flat top more than 200 m (660 ft) below the surface of the sea. The diameters of these flat summits can exceed 10 km (6.2 mi).
Where do turbidity currents occur?
Turbidity Currents–downhill flows sediment-laden water which occur in lakes or oceans–are one primary process responsible for transporting sediment from the coast to the deep sea.
How are turbidites formed?
Turbidites is sea-bottom deposits that are formed from massive slope failures. Rivers that flow into the ocean deposit sediments along the slope and continenal shelf. Turbidites from the delta region formed the sandstone bed in a deep basin. …
What causes turbidity?
Water turbidity can be caused by clay, silt and very small inorganic and organ matter, as well as algae, dissolved colored organic compound, plankton, and other microscopic animals. Turbidity can make water opaque or cloudy.
How does turbidity affect human health?
What are the effects of turbidity on humans? High levels of turbidity can protect bacteria and other organisms in water, so that chlorine cannot effectively disinfect it. High turbidity water can lead to nausea, cramps and headaches from some organisms.
What is a good turbidity level?
The WHO (World Health Organization) states that drinking water should not have turbidities greater than 5 NTU and should be below 1 NTU.
How is turbidity treated?
Coagulation-flocculation, a treatment process where colloids in water are destabilized so they can aggregate and be physically removed, can effectively reduce turbidity when combined with sedimentation and/or filtration.
How is NTU calculated?
How do we measure Turbidity? Nephelometric Turbidity units (NTU) are commonly used to measure turbidity. The nephelometric technique compares the light scattering in water samples to that in reference solutions. A handheld electronic meter can be used to measure turbidity.
What is HTU and NTU?
The number of transfer units (NTUs) needed is an indicator of the difficulty of separation. The transfer unit’s height (HTU), is an indicator of how effective the packing materials are in separating the material.
Why is lmtd needed?
The log mean temperature differential (LMTD), is used to determine heat transfer rates in flow systems, notably heat exchangers. The LMTD is derived from an analysis of a heat exchanging device with constant flow rate and fluid thermal characteristics.
What advantage does the effectiveness NTU method have over the lmtd method?
Therefore, the effectiveness of LMTD and NTU methods are equal. The effectiveness-NTU method has the advantage of being able to predict outlet temperatures without having to resort to numerical iterative solutions to nonlinear equations.
How is maximum heat transfer rate is obtained?
Flow is the best way to obtain maximum heat transfer rate.
What are the drawbacks of lmtd method?
Limitations and assumptions Condensers or reboilers are a particular case for the LMTD. Here, the latent heat associated with phase change is a special instance of the hypothesis.
How do you calculate lmtd?
by definition given above, LMTD for counter current flow=(60-50) / ln(60/50)=10 / 0. 1823=54.850C. For co-current heat exchanger, DT1=TH1 – TC1=100 – 30=700C (At first end hot and cold fluids enter the heat exchanger. )