Approaches of Reutilizing Dredged Sediments from Beijing-Hangzhou Grand Canal

Abstract

With the implementation of the dredging project in Beijing-Hangzhou Grand Canal, proper treatment of sediment is urgent. Analysis of samples revealed a spatial difference among sampling sites, varied degree of pollutions and a strong correlation among the pollutants implying a common source of origin. Based on the sediment quantity, the contamination status quo and relevant requirements in the standards, the sediments were categorized into three types with different disposal strategy. The majority of the sediment that is not polluted or mildly contaminated were to be relocated or used as planting soil and engineering backfill geomaterial. The heavily polluted sediments were to be transported and used in a local brick manufacturing plant render it harmless.