ENVIRONMENTAL INFLUENCE ANALYSIS IN THE PROCESS OF DREDGING AND ITS COUNTERMEASURE RESERACH

Environmental protection dredging can remove polluted sediment of water body thoroughly，eliminate the potential factors which can affect water quality，so environmental protection dredging has become an important measure of water governance． However，disturbance of polluted sediment and improper disposal of polluted sediment in the process of environmental protection dredging can easily lead to secondary pollution to the environment． Thus，various measures to reduce the disturbance of pollution sediment and sediment resource utilization technologies become research hotspots． Improving dredging equipment and technology often been used to reduce the disturbance of pollution sediment． At present，the dredging equipments mainly adopted in domestic are cutter suction dredger and environmental protection cutters． By means of the utilization of sediment，not only the secondary pollution to the environment can be reduced，but also the waste can be transformed into treasure，so resource can be increased． The current sediment resource utilization ways mainly include land use， building materials， filling materials， wastewater treatment materials， hydrogen production，etc．