Ground and Karst Subsidence

Question 1

It is defined as the lowering of the land surface due to sinkhole development

Answer 1

Surface subsidence and Collapse

Question 2

It is a rare disaster but can cause as much economic damage as earthquake, volcanic eruption, and landslide disasters

Answer 2

Sudden collapse events

Question 3

Chemical composition of Carbonate Dissolution

Answer 3

CaCO3 + H2CO3 = Ca(+2) + 2HCO3(-2)

Question 4

Water in the atmosphere can dissolve small amounts of CO2 which may result to rain water having small amount of carbonic acid when it gas on the Earth’s surface

Answer 4

Carbonate dissolution

Question 5

Examples of mine activities that remove material from below the surface that may result in a collapse if precautions are not taken

Answer 5

Salt mining and coal mining

Question 6

If fluids are withdrawn from below the surface, a decrease in fluid pressure mag occur resulting in the removal of support and possible collapse

Answer 6

Subsidence cased by fluid withdrawn

Question 7

Two most important fluids occur beneath the surface

Answer 7

Water (groundwater)
Petroleum (Oil and natural gas)

Question 8

When was the first subsidence observed in Wilmington, California.

Answer 8

1940

Question 9

It means depression in the landscape

Answer 9

Dolines

Question 10

Which language is Doline derived from?

Answer 10

Slovene; Dolina

Question 11

Several processes that from dolines

Answer 11

Surface solution
Cave collapse
Piping
Subsidence stream of superficial covers.

Question 12

This starts where solution is concentrated around favorable point such as joint intersections. The solution lowers the bedrock surface, so eating out our is a a depression

Answer 12

Solution Dolineams

Question 13

Are produced suddenly when the roof of a cave formed by underground solution gives way and fractutes or ruptures rick and soil

Answer 13

Collapse