Discussion on laws,regulations and technical standards for dredged sediments utilized in agricultural land
The key concepts and primary methods of utilizing dredged sediment in rivers,lakes and reservoirs for agricultural purposes were discussed.It also examines the pertinent laws and regulations,national standards,industry standards,and local standards associated with dredged sediment utilized in agricultural land.The dredged sediments from river and lake can be utilized for soil improvement,enhancing soil fertility,reclaiming cultivated land,repairing mines,managing dam mouths,restoring wetlands,as being soil amendment,soil materials,or a combination of both.Dredged sediment utilized in agricultural land is a crucial way to absorbing significant amounts of dredged sediment.It can create a win-win situation for ecological,social,and economic outcomes.Systematic laws and regulations for preventing and controlling soil pollution in agricultural land have been established with the"Soil Pollution Prevention and Control Law"as the core."Soil environmental quality risk control standard for soil contamination of agricultural land"(GB 15618-2018)is the primary standard for managing soil pollution risks in agricultural land within edible food produced.The fundamental requirement for managing and controlling the risk of agricultural land use in dredged sediments is"utilization of dredged sediments that may lead to soil pollution is prohibited".Now there is a lack of national standards for controlling pollutants in dredged sediments used on other types of agricultural land.It is recommended to expedite the drafting of standards for the remaining types of agricultural land.Now,it is advisable to establish control standards for soil pollutant levels according to protection objectives,and adhere to the principle that"the pollutant levels in the dredging sediment products should not exceed those in the soil at the application site."When the dredged sediment is treated and used as agricultural land soil or agricultural underground soil filling material not specified in GB 15618-2018,the emphasis should be on controlling the ecological risks of pollutants and the secondary pollution caused by water migration to surface soil and groundwater.When necessary,the potential impacts and risks to the quality and safety of agricultural products should be assessed."Soil quality-decision unit-multi incremental sampling method"(GB/T 42489-2023)can be used to sample silt pollutant content.Based on ensuring the accuracy of data and the reliability of conclusions,it is essential to control the number of samples,as well as monitoring and testing cost in a reasonable manner.
dredged sedimentsiltagricultural land utilizationpollutantlawsregulationstechnical standards
国家科技期刊平台
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