The team used a satellite photo of a suspected submerged city to find the site then surveyed it with a combination of deep-ground radar, digital mapping, and underwater technology.
The underground water is overtaken in the area of Linyi city, which changes the moving condition of underwater and caused the groundto sick.
临沂城区地下水的超采，改变了地下水的动力条件，引起地面塌陷，而且有进一步加强的趋势；
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Compared with modeling on ground terrain, modeling on underwater terrain is a converse process. It takes a few but valuable data to establish topological structure.