Reduced sediment export to the Pennsylvania Lake Erie littoral zone during an era of average lake levels

2021 ◽  
Author(s):  
Anthony M. Foyle ◽  
Karen L. Schuckman
Keyword(s):  
Littoral Zone ◽  
Lake Erie ◽  
Lake Levels ◽  
Sediment Export

Forecasting effects of climate change on Great Lakes fisheries: models that link habitat supply to population dynamics can help

2006 ◽  
Vol 63 (2) ◽  
pp. 457-468 ◽  
Author(s):  
Michael L Jones ◽  
Brian J Shuter ◽  
Yingming Zhao ◽  
Jason D Stockwell
Keyword(s):  
Climate Change ◽  
Great Lakes ◽  
Lake Erie ◽  
Ice Cover ◽  
Annual Runoff ◽  
Physical Models ◽  
Integrative Approach ◽  
Past Century ◽  
Lake Levels ◽  
Global Circulation Models

Future changes to climate in the Great Lakes may have important consequences for fisheries. Evidence suggests that Great Lakes air and water temperatures have risen and the duration of ice cover has lessened during the past century. Global circulation models (GCMs) suggest future warming and increases in precipitation in the region. We present new evidence that water temperatures have risen in Lake Erie, particularly during summer and winter in the period 1965–2000. GCM forecasts coupled with physical models suggest lower annual runoff, less ice cover, and lower lake levels in the future, but the certainty of these forecasts is low. Assessment of the likely effects of climate change on fish stocks will require an integrative approach that considers several components of habitat rather than water temperature alone. We recommend using mechanistic models that couple habitat conditions to population demographics to explore integrated effects of climate-caused habitat change and illustrate this approach with a model for Lake Erie walleye (Sander vitreum). We show that the combined effect on walleye populations of plausible changes in temperature, river hydrology, lake levels, and light penetration can be quite different from that which would be expected based on consideration of only a single factor.

The formation and evolution of Point Pelee, western Lake Erie

1976 ◽  
Vol 13 (1) ◽  
pp. 136-144 ◽  
Author(s):  
J. P. Coakley
Keyword(s):  
Lake Erie ◽  
Present Position ◽  
Lake Levels ◽  
Western Basin ◽  
Beach Ridges ◽  
Western Lake ◽  
Formation And Evolution ◽  
Position And Orientation ◽  
Point Pelee ◽  
Western Lake Erie

Point Pelee originated as a sandy foreland enclosing a marsh approximately 4000 years BP. A reconstruction of paleoenvironmental conditions prior to that time suggests strongly that it was formed initially by the progressive merging of beach ridges and dunes formed on opposite sides of the Pelee-Lorain moraine when rising lake levels in the western basin of Lake Erie were 3 to 4 m below present lake datum (173.4 m above sea level). Since that time, it has retreated to its present position and orientation under the influence of slowly rising lake levels and increasing wave energy from both sides.Such an evolution, though different from conventional mechanisms of spit formation, is supported by evidence derived from the local post glacial stratigraphy and the geomorphology of relict features preserved on the Point and on the shoal area to the south.

scholarly journals Periodic structures of Great Lakes levels using wavelet analysis

2011 ◽  
Vol 59 (1) ◽  
pp. 24-35 ◽  
Author(s):  
Taner Cengiz
Keyword(s):  
Wavelet Transform ◽  
Great Lakes ◽  
Lake Level ◽  
Lake Erie ◽  
Lake Michigan ◽  
Periodic Structures ◽  
Lake Superior ◽  
Great Lakes Region ◽  
Continuous Wavelet ◽  
Lake Levels

Periodic structures of Great Lakes levels using wavelet analysisThe recently advanced approach of wavelet transforms is applied to the analysis of lake levels. The aim of this study is to investigate the variability of lake levels in four lakes in the Great Lakes region where the method of continuous wavelet transform and global spectra are used. The analysis of lake-level variations in the time-scale domain incorporates the method of continuous wavelet transform and the global spectrum. Four lake levels, Lake Erie, Lake Michigan, Lake Ontario, and Lake Superior in the Great Lakes region were selected for the analysis. Monthly lake level records at selected locations were analyzed by wavelet transform for the period 1919 to 2004. The periodic structures of the Great Lakes levels revealed a spectrum between the 1-year and 43- year scale level. It is found that major lake levels periodicities are generally the annual cycle. Lake Michigan levels show different periodicities from Lake Erie and Lake Superior and Lake Ontario levels. Lake Michigan showed generally long-term (more than 10 years) periodicities. It was shown that the Michigan Lake shows much stronger influences of inter-annual atmospheric variability than the other three lakes. The other result was that some interesting correlations between global spectrums of the lake levels from the same climatic region were found.

scholarly journals The role of shallow basins and the littoral zone in modulating lake P cycling: a mass balance analysis of Lake Erie

2021 ◽  
Author(s):  
Zahra Akbarzadeh ◽  
Serghei Bocaniov ◽  
Helen Powley ◽  
Igor Markelov ◽  
Philippe Van Cappellen
Keyword(s):  
Mass Balance ◽  
Littoral Zone ◽  
Lake Erie ◽  
P Cycling ◽  
Balance Analysis ◽  
Mass Balance Analysis

Sedimentary processes and the evolution of the distal bayside of Long Point, Lake Erie

1994 ◽  
Vol 31 (9) ◽  
pp. 1461-1473 ◽  
Author(s):  
Robin G. D. Davidson-Arnott ◽  
Heather E. Conliffe Reid
Keyword(s):  
Lake Erie ◽  
Great Depth ◽  
Sediment Supply ◽  
Aerial Photographs ◽  
Lake Levels ◽  
Wave Refraction ◽  
The North ◽  
South Shore ◽  
High Lake Levels

Long Point spit, on the north shore of Lake Erie, is >40 km long and presently building into water that is >40 m deep. Annual sediment supply to the spit is estimated to be 1.0 × 106 m3∙a−1 and is derived from the erosion of cohesive bluffs along more than 90 km of shoreline to the west. The shoreline of the distal bayside consists of narrow barriers that connect the ends of dune ridges and enclose interdune ponds and swales. Unlike most barrier spits, the distal end shows little evidence of the formation of dune recurves, and the shoreline of the bayside, rather than fronting a protected bay, is exposed to waves generated by northeast winds blowing over a fetch >100 km. Results of wave refraction analysis indicate that because of the great depth of water at the tip, there is almost no refraction of the dominant westerly and southwesterly waves around the distal end, thus inhibiting the formation of recurves. Net sediment transport on the distal bayside is towards the distal end of the spit. The result is the development of a narrow spit platform extending the spit directly into the deepest part of Lake Erie. All sediment reaching the distal end along the exposed south shore is transported onto this platform and none reaches the distal bayside.The negative sediment budget on the distal bayside results in transgression of the shoreline through truncation of the dune ridges, and overwash and breaching of the small barriers. Historical aerial photographs show that most of the overwash and breaching occurs during periods of long-term high lake levels, with the barriers being rebuilt landward of their former position during the following periods of lower lake levels. Progradation of the south shore at the distal end is thus partly counterbalanced by the transgression of the bayside.

Sampling Larval Fish in the Littoral Zone of Western Lake Erie

1984 ◽  
Vol 10 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Richard A. Cole ◽  
John R. MacMillan
Keyword(s):  
Littoral Zone ◽  
Lake Erie ◽  
Larval Fish ◽  
Western Lake ◽  
Western Lake Erie

scholarly journals A DETACHED BREAKWATER SYSTEM FOR BEACH PROTECTION

1980 ◽  
Vol 1 (17) ◽  
pp. 119
Author(s):  
James R. Walker ◽  
Denton Clark ◽  
Joan Pope
Keyword(s):  
Aerial Photography ◽  
Lake Erie ◽  
Summer Season ◽  
Shore Protection ◽  
Lake Levels ◽  
Design Procedures ◽  
Natural Processes ◽  
Adverse Impacts ◽  
Second Year ◽  
High Lake Levels

Three segmented, detached breakwaters were constructed In the fall of 1977 at Lakeview Park, Ohio, on Lake Erie, to protect a beachfill to be used for recreation and shore protection. This paper documents the design procedures which established the configuration of the breakwaters and the beachfill, and determined the need for a terminal groin. The beachfill has been monitored by aerial photography and bathymetric profiling. During the second year, a storm of near design intensity generated severe waves concurrently with high Lake levels and eroded the updrift beach; however, the initial beach configuration was partially restored by natural processes during the following summer season. The project has functioned well, with very little loss of sand from the system and without adverse impacts on the downdrift coast.

Toe erosion of glacial till bluffs: Lake Erie south shore

1995 ◽  
Vol 32 (7) ◽  
pp. 829-837 ◽  
Author(s):  
Shahalam M. N. Amin ◽  
Robin G. D. Davidson-Arnott
Keyword(s):  
Lake Erie ◽  
Multiple Regression Model ◽  
Lake Levels ◽  
Beach Sediment ◽  
Beach Width ◽  
The Face ◽  
Recession Rates ◽  
South Shore ◽  
High Lake Levels ◽  
Measurement Period

Toe erosion and rates of recession of the toe were measured at four sites along a 3.5 km long stretch of shoreline on the south shore of Lake Erie from April to December 1986. The shoreline consists of bluffs ranging from 5 to 12 m in height and developed in overconsolidated till. Toe erosion was measured at peg lines consisting of pins driven horizontally into the face of the bluff at 0.25 m intervals to a height of 1.75 m above the beach, and steel rods driven vertically into the beach with a spacing of 1.5 m. At each site three lines were established and monitored at 1–2 week intervals. Because of record high lake levels, beaches in front of the bluffs were generally <5 m wide, and some erosion was measured on all but three occasions. Recession of the toe during any measurement period was generally 2–6 cm, with the maximum recorded being about 12 cm. Wave action during high-magnitude storms resulted in erosion occurring much higher up the bluff face than for low-magnitude events, but the actual recession of the toe was not substantially greater. A multiple regression model shows that there is a significant relationship between toe recession and several variables that indirectly control wave energy at the bluff toe. However, factors such as beach width and thickness of beach sediment did not have a significant influence on recession rates in this study, likely because the high lake levels resulted in very narrow beaches at all four sites throughout the study period.

Species composition and distribution of marine macro algae at Co To and Thanh Lan archipelago

2020 ◽  
Vol 20 (3) ◽  
pp. 267-276
Author(s):  
Dam Duc Tien ◽  
Nguyen Thi Mai Anh ◽  
Linh Manh Nguyen ◽  
Pham Thu Hue ◽  
Lawrence Liao
Keyword(s):  
Species Composition ◽  
Littoral Zone ◽  
Marine Algae ◽  
Similarity Coefficient ◽  
Algal Flora ◽  
Average Value ◽  
Site Number ◽  
Species Composition And Distribution ◽  
Total Species ◽  
Macro Algae

This paper exhibites species composition and distribution of marine seaweed at 10 sites of Co To and Thanh Lan islands in May 2019. The studies record 76 species of marine algae in the area, belonging to four divisions: Cyanophytes, Rhodophytes, Ochrophytes and Chlorophytes. Among them, five species are classified into Cyanophytes (comprising 6.6% of total species); thirty-four species into Rhodophytes (44.7%); twenty-one species into Ochrophytes/Phaeophytes (27.6%) and sixteen species into Chlorophytes (21.1%). The species composition of marine seaweeds in Co To and Thanh Lan shows significant differences as follows: 22 species (sites number 4 and 10) to 58 species (site number 2) and the average value is 38.7 species per site. Sørensen similarity coefficient fluctuates from 0.33 (sites number 5 and 10) to 0.84 (sites number 1 and 3) and the average value is 0.53. The current investigations show that four species of twenty-one species are collected in the littoral zone and forty-two species in the sub-littoral zone (in which there are thirteen species distributed in both littoral zone and sub-littoral zone). The algal flora in Co To and Thanh Lan is characterized by subtropics.

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