Chemico/biological investigation of contaminated sediment from the hamilton harbour area of Western Lake Ontario

1993 ◽  
Vol 22 (2) ◽  
pp. 61-70 ◽  
Author(s):  
C. H. Marvin ◽  
L. Allan ◽  
B. E. McCarry ◽  
D. W. Bryant
Keyword(s):  
Lake Ontario ◽  
Contaminated Sediment ◽  
Biological Investigation ◽  
Hamilton Harbour ◽  
Western Lake ◽  
Harbour Area

Impact of Proposed Burlington and Hamilton Sewage Discharges in Western Lake Ontario

2003 ◽  
Vol 38 (4) ◽  
pp. 627-645 ◽  
Author(s):  
Yerubandi R. Rao ◽  
Raj C. Murthy ◽  
Fausto Chiocchio ◽  
Michael G. Skafel ◽  
Murray N. Charlton
Keyword(s):  
Action Plan ◽  
Near Field ◽  
Lake Ontario ◽  
Zone Model ◽  
Hamilton Harbour ◽  
Western Lake ◽  
Treated Sewage ◽  
Treated Effluents ◽  
Typical Summer ◽  
The City

Abstract The alternate strategy of open-lake discharge may alleviate the need for unusually stringent treatment needed to meet water quality goals of the Hamilton Harbour Remedial Action Plan (RAP). The latest update of the RAP recommended a study of the possibility of offshore discharges. A study conducted for the City of Burlington has proposed a location for outfall in Lake Ontario. This paper utilizes a combination of physical limnological data and mathematical models to predict the waste plume characteristics for the proposed outfall in the lake. Near-field dilutions obtained from a mixing zone model show that, for treated effluents with a discharge condition of 2 m3/s at the proposed outfall site at Burlington, the dilution ratios are in the range of 13:1 to 28:1 for weak to moderate currents during summer stratification. Winter dilution ratios increased to 21:1 to 96:1 for moderate currents. The recommended site for open-lake outfall provides acceptable near-field dilutions for treated effluents under typical lake currents and density structure. The extension of outfall to a location farther offshore is only marginally beneficial. With the proposed Burlington outfall location and discharge conditions, no far-field contamination is observed near the beaches or nearby water intakes for typical summer and winter conditions. Thus, this study indicates that by discharging the treated sewage from an outfall in Lake Ontario it is possible to achieve the Hamilton Harbour RAP goals.

Water Exchange Between Lake Ontario and Hamilton Harbour: Water Quality Implications

1988 ◽  
Vol 23 (2) ◽  
pp. 213-226 ◽  
Author(s):  
J. Barica ◽  
M.N. Charlton ◽  
D.J. Poulton ◽  
R. Kohli
Keyword(s):  
Water Quality ◽  
Beneficial Effect ◽  
Residence Time ◽  
Water Exchange ◽  
Industrial Effluents ◽  
Lake Ontario ◽  
Hydraulic Residence Time ◽  
Hamilton Harbour ◽  
Western Lake ◽  
Harbour Water

Abstract Hamilton Harbour is an enclosed body of water situated at the western end of Lake Ontario and containing about 2.8 x 108 m3 of water, polluted by municipal and industrial effluents. It is connected to Lake Ontario by a ship canal, which facilitates a substantial exchange of water between the two water bodies. Exchange of harbour and lake water through the canal reduces the theoretical hydraulic residence time of the harbour and contributes to improvement of the harbour water quality through dilution and oxygenation. Without it, the Hamilton Harbour water quality situation would be more critical. The beneficial effect of dilution by Lake Ontario far exceeds contamination of western Lake Ontario by Hamilton Harbour water.

Growth of Bacterioplankton on Dissolved Organic Carbon in Hamilton Harbour and Western Lake Ontario

1991 ◽  
Vol 26 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Ruzena Markosova
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Sewage Treatment ◽  
Lake Ontario ◽  
Polluted Water ◽  
Sewage Sample ◽  
Batch Experiments ◽  
High Concentration ◽  
Hamilton Harbour ◽  
Western Lake

Abstract Bioassay procedure was used to measure dissolved organic carbon (DOC) and biodegradable dissolved organic carbon (BDOC) in Hamilton Harbour and western Lake Ontario using batch experiments with an incubation time of 12 days in four experiments. Three different levels of natural DOC concentration were assayed; high concentration of DOC, 20.2 mg C/1 (influence of sewage treatment inflow); intermediate concentration of DOC, 16.7 mg C/1 (STELCO plant, industry polluted water); and an unaffected locality with low concentration of DOC, 12 mg C/1 (predominantly autochtonous input from photosynthetic activity in Lake Ontario). Decreasing DOC in all samples was observed during the first five days of experiments followed by a stabilization of DOC at a constant level. The value of the labile fraction of DOC represented 75% of total amount of DOC in the sewage sample water, 57% in the sample affected by industrial waters and 66% of DOC in unaffected sample from Lake Ontario. Bacterial growth started rapidly from the first day of batch experiments and maximal biomass was reached after two to three days. The highest bacterial biomasses were reached in the samples affected by sewage treatment waters (2.37 mg C/1) and the lowest value was observed in Lake Ontario (0.51 mg C/1).

Identification of Taste and Odour Compounds from Western Lake Ontario

1984 ◽  
Vol 19 (1) ◽  
pp. 111-118 ◽  
Author(s):  
B.G. Brownlee ◽  
D.S. Painter ◽  
R.J. Boone
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Elemental Sulfur ◽  
Lake Ontario ◽  
Direct Link ◽  
Municipal Water Supply ◽  
Municipal Water ◽  
Western Lake ◽  
Odour Concentration

Abstract During August, 1983 geosmin was identified in a municipal water supply drawn from western Lake Ontario. The geosmin concentrations were 0.01-0.07 μg L-1, within the range for threshold odour concentration of 0.01-0.2 μg L-1. 2-Methylisoborneol was not detected. The odour 'event' coincided with a dieoff of Cladophora in the lake, but we were not able to establish a direct link between the dieoff and geosmin production. Decomposing Cladophora in shoreline areas produced a strong odour in the air. 3-Methylindole, elemental sulfur, dimethyl tetrasulfide, and dimethyl pentasulfide were tentatively identified in water samples collected from these areas, but geosmin and 2-methylisoborneol were not detected.

scholarly journals Subglacial water-sheet floods, drumlins and ice-sheet lobes

1999 ◽  
Vol 45 (150) ◽  
pp. 201-213 ◽  
Author(s):  
E.M. Shoemaker
Keyword(s):  
New York ◽  
Lake Michigan ◽  
New York State ◽  
Ice Sheet ◽  
Lake Ontario ◽  
High Water ◽  
Green Bay ◽  
Subglacial Lake ◽  
Western Lake ◽  
Subglacial Lakes

AbstractThe effect of subglacial lakes upon ice-sheet topography and the velocity patterns of subglacial water-sheet floods is investigated. A subglacial lake in the combined Michigan–Green Bay basin, Great Lakes, North America, leads to: (1) an ice-sheet lobe in the lee of Lake Michigan; (2) a change in orientations of flood velocities across the site of a supraglacial trough aligned closely with Green Bay, in agreement with drumlin orientations; (3) low water velocities in the lee of Lake Michigan where drumlins are absent; and (4) drumlinization occurring in regions of predicted high water velocities. The extraordinary divergence of drumlin orientations near Lake Ontario is explained by the presence of subglacial lakes in the Ontario and Erie basins, along with ice-sheet displacements of up to 30 km in eastern Lake Ontario. The megagrooves on the islands in western Lake Erie are likely to be the product of the late stage of a water-sheet flood when outflow from eastern Lake Ontario was dammed by displaced ice and instead flowed westward along the Erie basin. The Finger Lakes of northern New York state, northeastern U.S.A., occur in a region of likely ice-sheet grounding where water sheets became channelized. Green Bay and Grand Traverse Bay are probably the products of erosion along paths of strongly convergent water-sheet flow.

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