Sinkholes, sometimes referred to as dolines, are the most common surficial landforms found in karst landscapes. The three main morphological types of sinkholes are bowl-shaped, funnel-shaped, or well-shaped (Sweeting, 1974). The size of individual sinkholes may range from a few meters to in their dimension, several hundred meters in horizontal dimension, and over 100 meters in depth. Sinkholes can occur in close proximity to each other or completely isolated, it all depends on the porosity and permeability of the underlying karst bedrock. The five major types of sinkholes are solution, subsidence, collapse, alluvial stream sink, and subjacent karst collapse sinkholes. They are all are named for the processes leading to their formation (Jennings, 1985).

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