Dewatering Of Fine Sediments In Reservoir Using Geotextile Tubes And Potential Use In Detention Ponds

Lariyah Mohd Sidek, Luis Jansen, Mohamed Nor Bin Mohamed Desa, Pierre Y. Julien

Research output: Contribution to conferencePaper

Abstract

The trapping efficiency of fine grained sediments is very low due to the longer settling time.
This leads to serious challenges in sediment dredging and excavation projects such as
significant re-suspension of sediments at the point of excavation and imprecise excavation at
„hot spots‟ such as intakes and outlet structures, thus requiring longer project timelines. This
paper presents a new technique using geotextile tubes as the treatment facility for the dredged
sediments. The test is divided into three main stages: selection of chemicals and dosages, a
small pillow bag test and a 10-ton capacity tube test. The results of the test revealed that at a
feeding rate of 6–8 ton/h, with a chemical injection of 30–50 ppm, the geotextile tube was
very effective. Removal of turbidity was almost 65%. The slurry treated within the tubes
hardens quickly within 2 months. The study concludes that the geotextile tube is a good
solution for the treatment and containment of fine dredged sediments from reservoirs, lakes
and rivers. The future benefits of this method for sediment treatment is many and can be
extended to other sediment management facilities such as detention ponds, wetlands and
sediment ponds at construction sites.
Original languageEnglish
Pages1-8
Number of pages8
Publication statusAccepted/In press - 19 Nov 2014

    Fingerprint

Cite this

Mohd Sidek, L., Jansen, L., Bin Mohamed Desa, M. N., & Julien, P. Y. (Accepted/In press). Dewatering Of Fine Sediments In Reservoir Using Geotextile Tubes And Potential Use In Detention Ponds. 1-8.