The Bimmah Sinkhole is near Dibab village in Oman, an Arab state in the Arabian Peninsula. A winding stone staircase leads down to the sinkhole, which is a beautiful aquamarine and emerald color, with the darker green hues resulting from algae growth in the water. Blue Hole (Image credit:...
Helsel DR, Hirsch RM (1992) In: Statistical methods in water resources. Elsevier Science, New York, p 546 Hu M, Sayama T, Zhang X, Tanaka K, Takara K, Yang H (2017) Evaluation of low impact development approach for mitigating fl ood inundation at a watershed scale in China. J Environ...
Underground coal mining has taken place in 29 of the 67 counties in Pennsylvania, and a wide swath of the state’s southwestern region is at risk for soil subsidence, where underground materials shift or fall into voids created by mining and other extraction of m...
which means when sinkholes form, topography of the surface is changed. Karst is a topographic feature formed by the dissolution of soluble rocks, such as carbonates (limestone and dolomite) and salts (halite, gypsum, and anhydrite), which can be expressed in topography but can be a ...
December 2013: A new collapse sinkhole formed at the front of the house (labelled as b in Figure 3B). February–April 2015: The Ebro River flooded with a return period of less than 10 years. The water stage of the river was well above the street level. The river water flowed under pr...
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Geological factors influencing fault reactivation include the predom- inant and pre-existing stress state, geological history of faults, geotechnical properties distributed along the faults (friction angle, cohesion, and pore water pressure), proximity to the ground surface, local hydrogeological regime,...