What is a sinkhole?

A sinkhole is defined as a low area that forms when water erodes underground rock or soil, leading to the collapse of the surface layer. This process typically occurs in areas with limestone or other soluble bedrock that can dissolve over time, creating underground voids. When these voids become large enough, the ground above may not be able to support itself, resulting in a depression or hole. Such a formation allows for underground drainage as water can flow into the sinkhole and be carried away, often contributing to the overall hydrology of the area. Therefore, the description of a sinkhole as a low area with underground drainage accurately captures both its physical form and the mechanism that contributes to its development.