Types of Subsidence

1
Types of Subsidence

• Sink Holes
• Mine Collapse
• Fluid Withdrawal (oil and water)
• Compressible and/or Drying Clays
• Swelling Soils (Expandable Clays)
• Isostatic Rebound

2
09CO, p.228
3
Fig. 9-4, p.230
4
(No Transcript)
5
Fig. 9-3, p.229
6
Fig. 9-2, p.229
7
Fig. 9-1, p.229
8
Fig. 9-5, p.230
9
Fig. 9-6, p.230
10
Fig. 9-7, p.231
11
09CO, p.228
12
Fig. 9-8, p.231
13
Fig. 9-9, p.231
14
Fig. 9-10, p.232
15
Fig. 9-14, p.234
16
Fig. 9-13, p.233
17
Types of Subsidence

• Sink Holes
• Mine Collapse
• Fluid Withdrawal (oil and water)
• Compressible and/or Drying Clays
• Swelling Soils (Expandable Clays)
• Isostatic Rebound

18
Santa Clara, California
Fig. 9-15, p.234
19
Sacramento / San Joaquin Valley
Fig. 9-16, p.235
20
Fig. 9-17, p.236
21
Fig. 9-20, p.239
22
Types of Subsidence

• Sink Holes
• Mine Collapse
• Fluid Withdrawal (oil and water)
• Compressible and/or Drying Clays
• Swelling Soils (Expandable Clays)
• Isostatic Rebound

23
Fig. 9-21, p.240
24
Types of Subsidence

• Sink Holes
• Mine Collapse
• Fluid Withdrawal (oil and water)
• Compressible and/or Drying Clays
• Swelling Soils (Expandable Clays)
• Isostatic Rebound

25
Fig. 9-24, p.241
26
Fig. A2-5, p.457
27
Fig. 9-26, p.242
28
Fig. 9-28, p.243
29
Types of Subsidence

• Sink Holes
• Mine Collapse
• Fluid Withdrawal (oil and water)
• Compressible and/or Drying Clays
• Swelling Soils (Expandable Clays)
• Isostatic Rebound

30
Isostacy

• Isostacy A state of equilibrium (balance),
  resembling flotation, in which segments of the
  earths crust stand at levels determined by their
  thickness and density.

31
Fig. 2-11, p.19
32
Isostatic Rebound

• Isostatic Rebound The change in elevation of
  the Earths crust as a buoyant response to
  changing loads on the crust.

33
Fig. 12-22, p.309
34
Fig. 12-21, p.308