The underground erosion and disintegration produced by the activity of ground water will result in formation of soil caves.
岩溶区地下水或地表水的活动，将对土层产生潜蚀作用及崩解作用，进而形成土洞。
The high level underground water causes damages on the concrete board of the canal such as seep, freezing, sulfate erosion and swelling by swelled ground.
由于地下水位高，造成地下水对渠道混凝土板的渗透破坏、冻胀破坏、硫酸盐侵蚀破坏和膨胀土膨胀破坏。
Erosion by the Yangtze river had formed numerous gorges and construction was dogged by underground rivers and caves.
沿路因长江侵蚀有许多峡谷，而且建设经常被暗河和山洞所阻断。
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