The cartographic challenge is to deliver automated, real-time visualizations from distributed Hydrological Cartography Units that gather raw measurement data while applying sound cartographic rules and standards.
Our service provides a web-based, cartographic, real-time information system that is delivered to your desktop with bi-weekly updates. True real-time data of Swiss hydro-meteorological measuring networks are used. Our data is compiled from the last 20 years of data gathered from area related active well networks and provide basic statistics about the groundwater-level data. is integrated into the update. The data is processed, and visualizations are developed and displayed in various different ways, depending on the chosen timeframe and level of detail.
Natural sinkholes occur when bedrock is dissolved by water, causing the ground above it to collapse. The bedrock typically consists of carbonate rock, such as limestone or dolomite. Rocks that readily dissolve in water are called karst.A sinkhole forms when water falls onto an area composed of easily-dissolved rock, and the water cannot drain out. Water absorbs carbon dioxide as it seeps through the soil. The carbon dioxide makes the water mildly acidic. The acidic water collects inside the rocks, which dissolve and create a depression. In some cases, the ground above a sinkhole collapses very slowly. In others, the ground collapses abruptly, causing a catastrophic failure of any structure that lies above.
Sinkholes vary widely in size and shape. Some are shallow while others are very deep. Some are a few feet wide while others are acres across. Some sinkholes are bowl-shaped while others have steep sides
Rocks with potential for karst formation are found in all 50 states. Damage due to karst subsidence and sinkhole collapse is a natural hazard of national scope.
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