For dredging works, only mechanical dredgers with bucket-type closed-grabs shall be used for the dredging of river bed or ponds.

进行挖泥工程时，只可使用密封抓斗式的机械挖泥机，以挖掘河床或塘底的淤泥。

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This paper discussed the method and practice of construction quality management for dredging works from the aspects of personnel, equipment, material and technique.

浅议从人员、设备、材料、工艺等方面控制疏浚工程施工质量的方法与实践。

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For improving future navigation conditions regulation measures such as reservoir operation scheme, river training works and dredging are discussed.

对各种治理措施，诸如水库调度、河床整治及疏浚，也进行了讨论。

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Infrastructural works such as the construction of ports, dredging, pipelines and oil or mineral extraction may also damage sites.

UNESCO: Underwater Cultural Heritage