Plume tracking and dilution of effluent from the Boston sewage outfall

Hunt, Carlton D.; Mansfield, Alex D.; Mickelson, Michael J.; Albro, Carl S.; Geyer, W. Rockwell; Roberts, Philip J. W.

doi:10.1016/j.marenvres.2010.04.005

Cited by 48 publications

(38 citation statements)

References 18 publications

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“…The design placed the caged mussels directly in the effluent plume which was estimated to be diluted 70:1 (Hunt et al 2002b). Prior to diversion, the area did not receive direct input of effluent, thus displayed low bioaccumulation levels.…”

Section: Furthermore They Indicate "Concentrations Of Two Chemicalsmentioning

confidence: 99%

Long-term monitoring using resident and caged mussels in Boston Harbor yield similar spatial and temporal trends in chemical contamination

Hunt

Slone

2010

Marine Environmental Research

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Measurements of chemical contaminants in caged (transplanted) and resident mussel populations have become a routine tool for monitoring and assessing the status and trends of coastal water quality. However, few long-term data sets are available to assess the comparability and efficacy of these two monitoring approaches. Three long-term independent data sets exist for Boston Harbor: the National Mussel Watch program has analyzed resident blue mussels (Mytilus edulis) from the Boston Harbor/Massachusetts Bay region for over twenty years, the Massachusetts Water Resources Authority has annually deployed caged (transplanted) mussels (Mytilus edulis) to assess bioaccumulation potential of sewage effluent discharged under its NPDES permit for over fourteen years, and the GulfWatch program has analyzed resident blue mussel populations for over twelve years. Together, these data provide consistent and comparable information on temporal and spatial changes in chemical contamination in Boston Harbor as steps were taken to reduce contaminant loading. The data also demonstrate the complementary nature of resident and caged (transplanted) mussels for assessing contaminant trends even when the basic approaches and sampling frequency differ. These fifteen year data sets demonstrate contaminant concentrations in mussels from Boston Harbor are similar and with few exceptions have significantly decreased since the early 1990s. The observed trends also demonstrate broad scale improvements to the quality of Boston Harbor and expand understanding of the response of coastal systems to interventions that reduce the load of chemicals to the ocean.Keywords: Mussel Watch, NOAA, GulfWatch, Status and Trends, caged mussels, The long-term data from the Mussel Watch program from 1986 through 2005 also reveal national, regional and local trends (Kimbrough et al., 2008). One of the local areas that received significant national attention in the late 1980s is Boston Harbor. Since then the Massachusetts Water Resources Authority (MWRA), the agency responsible for water supply and treatment of sewage for metropolitan Boston has completed several facility upgrades that improve the quality of sewage discharged to this system. These include termination of sewage sludge discharge in 1991, construction and operation of advanced primary treatment facilities since 1995, completing of advanced secondary treatment facilities in 2002, and relocation of the sewage effluent discharge 9.5 miles offshore in Massachusetts Bay (Werme and Hunt 2006;Rex et al. 2002). Over 95 percent of the sewage discharged from this outfall receives secondary treatment.The MWRA has also monitored the waters and sediments of Boston Harbor and Massachusetts Bay for trends in anthropogenic and other chemicals since the early 1990s (Tucker et al. 2006, Maciolek et al. 2006, Taylor 2005. Several studies have documented major improvements to the water and sediment quality , Bothner and Butman 2007, Zago et al. 2001, Bothner et al. 1998. One element of this long-term monitoring ...

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Section: Furthermore They Indicate "Concentrations Of Two Chemicalsmentioning

confidence: 99%

Long-term monitoring using resident and caged mussels in Boston Harbor yield similar spatial and temporal trends in chemical contamination

Hunt

Slone

2010

Marine Environmental Research

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“…A numerical model can be constructed as a one-, two-, or three-dimensional model in accordance with the dominant spatial directions of the physical processes [9] [10] [11]. There are several methodologies to study thermal plume behavior, ranging from physical models [12], to in situ data analysis [13] [14] to the use of numerical models [15]. The objectives of this paper were as follows: 1) to simulate the transport of temperature process and thermal diffusion of effluent cooling water of Ninh Thuan nuclear power plant, 2) to impact assessment of effluent cooling water to environment and ecological ecosystem around areas.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Effect of Thermal Diffusion Process from Nuclear Power Plants in Vietnam

Thai¹,

Tri²

2017

EPE

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In this study, we evaluate the ecological impact of effluent cooling water from the Ninh Thuan nuclear power plant II, using a two-dimensional hydraulic model to simulate thermal diffusion from the effluent outfall. Sites selected for this study were Ninh Thuan nuclear power plant and Vinh Hai seawater in four different scenarios. This paper utilized the relationship between surface water temperature and the water temperature at a depth of −15 m to calculate the water temperature at intake and outlet at a depth of −14 m. A combination between the results of interpolated and results of model showed that effluent cooling water from Ninh Thuan plant affected the largest incidence about 2450 m in the North, 880 m in the South and 960 m in the West. It can be considered as safe distance to not to affect the coral reefs ecosystem in the North and sea turtle conservation area in the South. This study was first in this region to have an integrated approach using two-dimensional model.

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“…Dilution of these waste transported to receiving environment is supplied by ports on the risers located at the end of submarine outfalls. Submarine outfalls are composed of onshore headwork, the feeder pipe and the diffuser pipe, where a set of riser and ports are located [1][2][3][4][5]. Installation, operation and maintenance [6] of submarine outfalls are highly costly and a high-tech process that should provide structural and environmental requirements.…”

Section: Introductionmentioning

confidence: 99%

Analiza valnog opterećenja podmorskih ispusta

2015

JCE

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Analysis of submarine outfalls subjected to wave load Significant improvements have been made in recent years in the field of submarine outfall construction technology. Such an advancement resulted in structural improvements of submarine outfalls, especially with regard to diffuser pipes, risers, and ports. The paper focuses on the modelling of one part of submarine outfall, namely the diffuser pipes made of various materials, and on the effects of their surroundings (internal and external flows). The fluid structure interaction technique is applied in the analyses. The analyses conducted in the paper show that the highest stress values are obtained in the pipe-riser connections. Highest displacements are observed when wave load is axially applied on the structure. Analiza valnog opterećenja podmorskih ispustaPosljednjih se godina bilježi značajan napredak u području tehnologije izvođenja podmorskih ispusta. Takav napredak doveo je do konstrukcijskih poboljšanja podmorskih ispusta, posebice difuzorskih i vertikalnih cijevi te sapnica. Rad se bavi modeliranjem jednog dijela podmorskog ispusta, točnije difuzora, izrađenih od raznih materijala te utjecajima njihovog okruženja (unutarnji i vanjski tokovi). U analizama primijenjena je tehnika interakcije fluida i konstrukcije. Provedene analize pokazuju da su naprezanja najviša na spojevima između glavne i vertikalne cijevi. Najviši se pomaci ostvaruju pri osnom nanošenju valnog opterećenja na konstrukciju.

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Plume tracking and dilution of effluent from the Boston sewage outfall

Cited by 48 publications

References 18 publications

Long-term monitoring using resident and caged mussels in Boston Harbor yield similar spatial and temporal trends in chemical contamination

Long-term monitoring using resident and caged mussels in Boston Harbor yield similar spatial and temporal trends in chemical contamination

Modeling the Effect of Thermal Diffusion Process from Nuclear Power Plants in Vietnam

Analiza valnog opterećenja podmorskih ispusta

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