A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigating the Downstream Effects of River Regulation and Sediment Transport on the Grand Lake Meadows Complex, New Brunswick, Canada
Sediment in a fluvial system impacts biological and physical processes such as fish, macrophytes and insect health, habitat suitability, fluid mechanics, and floods. Alterations to natural sediment transport such as those caused by hydropower dams and associated reservoirs must be understood since the entire ecosystem will be affected. The purpose of this research is to quantify the downstream effects that the Mactaquac Generating Station (MQGS) has on the sediment dynamics in the Wolastoq|Saint John River (W|SJR) in New Brunswick, Canada; we are specifically investigating how the downstream Grand Lake Meadows Complex (GLM Complex) has been affected by the changes in suspended sediment load. In order to understand implications of changes in sediment, we must first estimate how much sediment enters the reservoir, and the relationship between inflowing sediment and depositing sediment. Hydraulic parameters such as total suspended solids (TSS), turbidity and trap efficiency (TE) were used in this research to quantify the amount of suspended sediment entering the reservoir since the construction of the MQGS in 1968. Field data were collected during the summer and fall months to estimate suspended sediment concentrations, and a linear relationship between turbidity and TSS was developed during ice cover months to complete a year-round dataset. The relationships were generated for four different reaches in the lower Wolastoq|Saint John River and were used as a passive method for estimating TSS concentrations. The relationships had R2 values of 0.85, 0.88, 0.95 and 0.98 for the Meductic, Longs Creek, MQGS and Bill Thorpe Walking Bridge sites, respectively. In the study region, sediment transport peaks with the high flows during the spring freshet and fall rain storms and reduces with the low flows during the summer and winter months. The results of this research will further the understanding of sediment dynamics locally, and the impacts on the development and formation of the GLM Complex, while also advancing our understanding of sediment dynamics and regulated rivers in general.
Investigating the Downstream Effects of River Regulation and Sediment Transport on the Grand Lake Meadows Complex, New Brunswick, Canada
Sediment in a fluvial system impacts biological and physical processes such as fish, macrophytes and insect health, habitat suitability, fluid mechanics, and floods. Alterations to natural sediment transport such as those caused by hydropower dams and associated reservoirs must be understood since the entire ecosystem will be affected. The purpose of this research is to quantify the downstream effects that the Mactaquac Generating Station (MQGS) has on the sediment dynamics in the Wolastoq|Saint John River (W|SJR) in New Brunswick, Canada; we are specifically investigating how the downstream Grand Lake Meadows Complex (GLM Complex) has been affected by the changes in suspended sediment load. In order to understand implications of changes in sediment, we must first estimate how much sediment enters the reservoir, and the relationship between inflowing sediment and depositing sediment. Hydraulic parameters such as total suspended solids (TSS), turbidity and trap efficiency (TE) were used in this research to quantify the amount of suspended sediment entering the reservoir since the construction of the MQGS in 1968. Field data were collected during the summer and fall months to estimate suspended sediment concentrations, and a linear relationship between turbidity and TSS was developed during ice cover months to complete a year-round dataset. The relationships were generated for four different reaches in the lower Wolastoq|Saint John River and were used as a passive method for estimating TSS concentrations. The relationships had R2 values of 0.85, 0.88, 0.95 and 0.98 for the Meductic, Longs Creek, MQGS and Bill Thorpe Walking Bridge sites, respectively. In the study region, sediment transport peaks with the high flows during the spring freshet and fall rain storms and reduces with the low flows during the summer and winter months. The results of this research will further the understanding of sediment dynamics locally, and the impacts on the development and formation of the GLM Complex, while also advancing our understanding of sediment dynamics and regulated rivers in general.
Investigating the Downstream Effects of River Regulation and Sediment Transport on the Grand Lake Meadows Complex, New Brunswick, Canada
Lecture Notes in Civil Engineering
Desjardins, Serge (editor) / Azimi, Amir Hossein (editor) / Poitras, Gérard J. (editor) / Leavitt, Jaime (author) / Haralampides, Katy (author)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 9 ; Chapter: 15 ; 205-213
2024-10-10
9 pages
Article/Chapter (Book)
Electronic Resource
English
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