Study on Dredging and Evaluation of River Sediment——Case Study of Rivers in Sanya,China
In order to select a more effective,environmental friendly and economical sediment dredging method and sludge disposal schemes,this study used the parallel section method and the potential ecological risk index method to investigate and analyze the sediment nutrient,organic matter and heavy metal pollution characteristics and pollution degree of rivers in Sanya,China,and according to the degree of pollution to determine the necessity,scope,depth and quantity of dredging.This paper drew the following conclusions:(1)The sediments of monitoring rivers in Sanya were mainly polluted by organic matter and total phosphorus,which had potential impacts on eutrophication of river water;and(2)the dredged sludge was rich in nutrients such as organic matter,nitrogen and phosphorus,and was a high-quality soil conditioner.The content of heavy metals in the sediment of the rivers was in line with the Class I limit of Green Planting Soil(CJ/T340-2016).The dredged sediment can be used as soil amendment or soil replacement for landscaping.In this paper,the whole dredging process research for the work of the other similar river has a certain reference value and significance.
River dredgingnutrientsheavy metalssludge disposal and treatment
国家科技期刊平台
NSTL
万方数据
