MODAL GRAIN SIZE EVOLUTION AS IT RELATES TO THE DREDGING AND PLACEMENT PROCESS - GALVESTON ISLAND, TEXAS
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How to Cite

Maglio, C., Das, H., & Fenner, F. (2020). MODAL GRAIN SIZE EVOLUTION AS IT RELATES TO THE DREDGING AND PLACEMENT PROCESS - GALVESTON ISLAND, TEXAS. Coastal Engineering Proceedings, (36v), papers.7. https://doi.org/10.9753/icce.v36v.papers.7

Abstract

During the fall and winter of 2015, a beneficial-use of dredged material project taking material from the Galveston Entrance Channel and placing it on a severely eroded beach of Galveston Island was conducted. This material was estimated to have 38percent fines. This operation was conducted again in the fall of 2019 and monitored for estimation of the loss of fines, changes in compaction and color from the dredging source to the beach. The local community and state funded the incremental cost at approximately $8 a cubic yard in 2015, and $10.5 a cubic yard in 2019 to have this material pumped to the beach. The projects were closely monitored by the U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center (ERDC) and the USACE Galveston District. The data from this placement project was used to calculate and better understand the loss of fines during the dredging and placement process as well as aid in the generation of an empirical formula to estimate the loss of fine sediments during dredging and beach placement. This formula takes into account: losses due to dredging equipment operations, slope of the effluent return channel at the beach, sediment settling velocity, and sorting parameter.

Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/VQ36upT2iQo
https://doi.org/10.9753/icce.v36v.papers.7
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References

Berkowitz, J., VanZomeren, C., and Priestas, A. 2018. Potential Color Change Dynamics of Beneficial Use Sediments. Journal of Coastal Research 34(5), 1149-1156.

Coor, J.L, and Ousley, J.D. 2019. Historical Analysis of the Change in Percent Fines during Beach Nourishment. ERDC/CHL CHETN-VI-50.

HDR Design Memorandum, November 30, 2015. “Beach Nourishment along Galveston Seawall (12th to 61st Street).” By Daniel Heilman, HDR project 260554.

Maglio, C., Das, H.S., and Fenner, F.S. 2019. Empirical Formula to Estimate Borrow Sediments Ultimate Beach Capability through Case Studies, in Florida and Texas. Coastal Sediments 2019 – Proceedings of the 9th International Conference, St. Petersburg, FL.

Smith, S.J., Priestas, A.M., Bryant, D.B., Brutsche, K.E., and Fall, K.A. 2019. Sediment sorting by hopper dredging and pumpout operations. OCS Study BOEM 2019-010. U.S. Department of the Interior, Bureau of Ocean Energy Management, Sterling, VA.

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