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Holocene Evolution, OFR 01-076

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Table 1.  Describes the distribution of sediment volume not only at time intervals, but also by depositional environment.  The bottom portion of the table compares the volumes calculated by ArcView with those calculated by EarthVision.  Of note, working with small, sliver polygons can increase the error associated with the volume calculations.  By adding up the individual pieces, the table shows that the total sediment deposited in the CRLC from 11,000 yr BP - present day is 105.941 km3.  However, simply subtracting the 11,000 year surface from the present day surface, and calculating the volume on that grid yields a total volume of 104.698 km3.

TIME FRAME (thousand years)  

SEA LEVEL (meters below present day)

SHELF Volume (km3)

BAY Volume (km3)

BEACH Volume (km3)

TOTAL Volume (km3)
pre-11   9.053 15.378    
11 TO 10 60 to 47 7.802 4.092    
10 TO 9 47 to 32

8.453

5.604

    
9 TO 8 32 to 20 8.691 6.400    
8 TO 7 20 to 15 6.897 3.126    
7 TO 6 15 to 11 6.733 2.472    
6 TO 5 11 to 8 6.950 1.360    
5 TO 4 8 to 5.5 6.733 1.305 0.374  
4 TO 3 5.5 to 3 6.655 1.071 0.229  
3 TO 2

3 to 1.5

 6.247 0.601 0.156  
2 TO 1 1.5 to 0.5 6.084 0.315 0.477  
1 TO 0 0.5 to 0 6.066 0.738 0.310  
           
Totals      86.364 42.462 1.546 105.941

 

 

ARCVIEW

EARTHVISION
Lowstand to Ravinement (volume km3)

42.462

 42.340238
     
Ravinement to Present (volume km3)

87.910

 87.915654
TOTAL 130.372 130.255892

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