what is a sinkhole and how many deaths occur each year because of this?

Answer 1

Sinkholes, also known as sinks, shakeholes or dolina (in the Slovene language dolina means valleys), and cenotes, are a feature of landscapes that are based on limestone bedrock. They are found worldwide. One form is the collapse of a cave roof. The result in this case is a depression in the surface topography. This may range anywhere from a small, gentle earth-lined depression, to a large, cliff-lined chasm. Most often there is a small area of rock exposure near or at the bottom of a sinkhole, and a patent opening into the cave below may or may not be visible. In the case of exceptionally large sinkholes, such as Cedar Sink at Mammoth Cave National Park, there may actually be a stream or river flowing into the bottom of the sink from one side and out the other side.

Sinkholes often form in low areas where they form drainage outlets for a running or a standing water. They may also form in currently high and dry locations. Florida has been known for having frequent sinkholes, especially in the central part of the state.

Sinkholes are usually but not always linked with a karst landscape. Karst represents a set of surface features that are characteristic of limestone under the soil. In many such regions, there may be hundreds or even thousands of sinkholes in a small area so that the surface as seen from the air looks pock-marked. Often in such areas there are few or no flowing streams on the surface because the drainage is all sub-surface.

Sinkholes have for centuries been used as disposal sites for various forms of waste. A consequence of this is the pollution of groundwater resources, with serious health implications in such areas.

Sinkholes also form from human activity, such as the rare but still occasional collapse of abandoned mines in places like West Virginia. More commonly, sinkholes occur in urban areas due to water main breaks or sewer collapses when old pipes give way. They can also occur from the overpumping and extraction of groundwater and subsurface fluids.

Natural sinkholes can be very deep, offering extremely challenging conditions for adventurous and experienced divers. Some of the most spectacular are the Zacaton cenote in Mexico, the Boesmansgat sinkhole in South Africa, Sarisariñama tepuy in Venezuela and in the town of Mount Gambier, South Australia-.

Answer 2

Sinkhole Deaths

Answer 3

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RE:
what is a sinkhole and how many deaths occur each year because of this?

Answer 4

How do sinkholes form?
Sinkholes are most commonly thought of as physical depressions or holes in the surface of the land. Not all sinkholes, however, are as visible or dramatic as a home or roadway falling into the ground. Many times, sinkhole activity never manifests itself of the surface of the land, making it harder to detect.

The entire state of Florida sits on top of thousands of feet of limestone. Limestone is a porous rock, capable of cracking, breaking, and dissolving. The most significant factor in the development of sinkholes is the dissolution of the limestone underlying Florida by acidic waters. As water moves through the soil, it becomes more acidic as it reacts with living and decaying plant matter. This water reaches the underlying limestone, it slowly begins to dissolve the rock and creates voids and cavities. The soil resting on top of the limestone then collapse or subsides into the caverns and voids and causes sinkholes.

A rapid increase in sinkhole activity can be attributed to the development of land, which changes the earth’s surface as well as the weight or load on the soil beneath it. The creation of retention ponds, new buildings and homes, roadways, and changes in ground water levels can all trigger sinkhole activity.

This is all i could find on death with sinkholes this is the second link
Boesmansgat, also known in English as "Bushman's Hole", is believed to be the third-deepest submerged freshwater cave (or sinkhole) in the world, approximately 270 metres deep. It is located in the Northern Cape province of South Africa, and is where famed deep cave diver Dave Shaw died on January 8, 2005 while recovering the body of an amateur diver, Deon Dreyer, who had drowned while diving with friends ten years earlier. Dreyer's remains were located at a depth of over 800 feet, and Shaw died while expending considerable effort as he attempted to place the body in a body bag.

Both bodies floated to the surface on January 12, much to the surprise of the recovery team. Details of this event can be found at Outside Online article. [1]

Answer 5

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