grd

The geological and hydrological pressures were generally neglected primarily due to the challenging nature of the monitoring task in an underwater setting, particularly over a large-scale region. Using repeated multibeam sonar measurements, we developed an uncertainty-based approach for interpreting the geomorphic change of the Lion City, an ancient Chinese city that is submerged in Qiandao lake.

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Two high-resolution bathymetry investigations were conducted in the Lion City at a temporal interval of 14 years. The first topographic dataset were collected using a Simrad EM3000 MBES in May, 2002. In the data collection process, the DSM212 beacon-aided GPS technology was used for the horizontal positioning of the sonar.The second topographic dataset was collected using a Sonic 2024 MBES in May, 2015. The horizontal positioning information was provided by the differential GPS technology (centimeter accuracy).

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