Beneficial Uses of Dredged Material: Part of the Solution to Restoration of Louisiana's Coastal Wetlands

UK research into the beneficial uses of dredged material is being undertaken at Strathclyde University, and includes initiatives in research in the use of dredgings for soil in land restoration projects, and for brick manufacture. Extensive research in the historically industrial River Clyde in Scotland has shown that pollutant levels do not preclude the use of selected materials for land restoration work. However, limitations are imposed on the use of the material for agricultural or grazing purposes at this time. Brick manufacture from clay sediments has proved that an attractive, quality product can be provided to the industry although some further testing is required; particularly in the area of atmospheric emissions during firing. The use of dredged clay for landfill capping and lining also remains a viable possibility. Economic considerations for each application vary, and require further investigation, however, the options are technically feasible and if employed on a larger scale, can account for a significant proportion of dredged sediments which are currently disposed of at sea.

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Vertical migration and mortality of benthos in dredged material—part I: Mollusca

Marine Environmental Research ◽

10.1016/0141-1136(81)90043-x ◽

1981 ◽

Vol 4 (4) ◽

pp. 299-319 ◽

Cited By ~ 47

Author(s):

Don Maurer ◽

Richard T. Keck ◽

Jeff C. Tinsman ◽

Wayne A. Leathem

Keyword(s):

Vertical Migration ◽

Dredged Material ◽

Material Part

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Vertical migration and mortality of benthos in dredged material: Part II—crustacea

Marine Environmental Research ◽

10.1016/0141-1136(81)90014-3 ◽

1981 ◽

Vol 5 (4) ◽

pp. 301-317 ◽

Cited By ~ 29

Author(s):

Don Maurer ◽

Richard T. Keck ◽

Jeff C. Tinsman ◽

Wayne A. Leathem

Keyword(s):

Vertical Migration ◽

Dredged Material ◽

Material Part

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Beneficial Uses of Dredged Material in Green Infrastructure and Living Architecture to Improve Resilience of Lake Erie

Infrastructures ◽

10.3390/infrastructures3040042 ◽

2018 ◽

Vol 3 (4) ◽

pp. 42 ◽

Cited By ~ 2

Author(s):

Shruti Bhairappanavar ◽

Rui Liu ◽

Reid Coffman

Keyword(s):

Water Quality ◽

Green Infrastructure ◽

Lake Erie ◽

Commercial Product ◽

Unit Weight ◽

Water Retention Capacity ◽

Growth Media ◽

Dredged Material ◽

Beneficial Uses ◽

Leachate Water

To maintain the navigational depth, 1.15 million cubic meters (1.5 million cubic yards) of sediment is dredged out from the federal harbors every year from Lake Erie, Ohio Coast. Treating this huge amount of dredged material is a major challenge due to the mobilization of potential contaminants causing depreciation in water quality and depletion of valuable land. Rather than treating the dredged material as a waste, we suggest investigating alternative ways to recycle and reuse the material within Green Infrastructure (GI) and living architecture applications. This study identifies potential applications of the dredged material in bioretention and vegetative roof systems, and examines the role of dredged material in these edaphic conditions. The paper discusses the beneficial uses of dredged material in GI by investigating the quality of dredged material and performances of GI built using dredged material through laboratory and field-testing. Preliminary results of a growth media using dredged material for the vegetative roof have been developed in lab/field studies that possess the performance values comparable to the current commercial product. The growth media containing lightweight aggregate, made from the dredged material, is observed to have high water retention capacity and high unit weight in comparison to a commercial product. The growth media leachate water test demonstrated the water quality to be comparable to the drained water from the commercial product. The growth media overwintered and advanced a rare plant species, Viola pedatifida, which is similar to conventional media. The beneficial uses of dredged material in the GI will help maintain the economic viability of harbors and ports along the shoreline of Lake Erie in Ohio and GIs, which were built using dredged material that can help address storm water management issues in urban areas due to extensive impervious surfaces.

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Experimental Study on the Improvement of High Water Content Dredged Material by Cement and by Quicklime

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.878.714 ◽

2014 ◽

Vol 878 ◽

pp. 714-719 ◽

Cited By ~ 1

Author(s):

Ying Hao Huang ◽

Chan Dong ◽

Xiao Lei Zhan ◽

Yun Fei Guan

Keyword(s):

Water Content ◽

High Water ◽

High Water Content ◽

Dry Density ◽

Dredged Material ◽

Test Results ◽

Environmental Friendly ◽

Dredged Materials ◽

Beneficial Uses ◽

Modified Soil

Dredging is necessary to keep rivers, harbors and lakes function normally. These dredged materials (DM) have poor geotechnical properties and are normally treated as wastes. Thus, utilization of DM for beneficial uses such as fill is being considered as an environmental-friendly and economical option. In this study a dredged material taken from Tai-hu Lake was modified by adding quicklime and by Portland cement. Water content, dry density, plasticity, and California bearing ratio (CBR) of the two types of modified soil were determined and compared. Test results show that both quicklime and cement can evidently decrease the water content and increase dry density, but the former can get better effect relatively. On the other hand, both quicklime and cement can significantly decrease the plasticity characteristics, and change the raw DM classified as CH to MH after modified, moreover, the cement has better effect on the improvement of plasticity. For the same additive content and curing days, the cement modified soil has larger CBR strength than that of the quicklime modified soil. Conclusions of the paper maybe beneficial and useful for the solidification material choose, and for practical dredged material solidification projects.

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