Study on Primary Treatment of Dam Sediment and Replenishing to the River

Abstract

Water turbidity is one of the biggest problems in case of reservoir sediment replenishment to the river. Moreover, the processing of the nutrients contained in the collected sediment is also another crucial problem. The purpose of our study are; how to dredge sediment from reservoirs safely, and how to produce the appropriate grain sized material from the sediment which contain very fine sediments or nutrients. We carried out field examination for spiral classifiers and replenishment tests to examine the effect of this treatment system for the reduction of water turbidity. Also we carried out laboratory flocculation and sedimentation tests against the suspended solids, and flow channel tests.