PowerPoint Presentation - SEDIMENTATION

lameubiquityMechanics

Feb 21, 2014 (3 years and 8 months ago)

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SEDIMENTATION

Objective: To become familiar
with the different types of marine
sediments, the processes that
make them, and understand how
turbidity currents are created


Biogenous Sediments


Exercise 1

Flocculation

How does sediment behave
differently in SW vs. FW?


Demonstration

Exercise 2


Turbidity Currents

(~55mph)

Exercise 2


Turbidity tubes


Set up tube



Set angle


Fill with water


Assign tasks
(one timer, one
recorder, one pourer, one ruler)


LEAVE BLACK CLAMP ON TUBE!!!

Exercise 2


Turbidity tubes



Run 6 trials


2 at 40ppt Green
(different angles)


2 at 80ppt Red
(different angles)


2 Silica
(Yellow is High density and
Orange is Low density plus one small
scoop of silica)


Measured vs. Theoretical


U = 0.7 [(d
1

-

d
2
)(gh)/d
2
]
-
2


Densities

d
2



Water =1 g/ml




d
1



40ppt = 1.026 g/ml





-

80ppt =1.055 g/ml




-


High Silica =

1.19 g/ml



-


Low Silica = 1.095g/ml