An empirical model for sediment resuspension in shallow lakes

Hydrobiologia ◽  
1996 ◽  
Vol 317 (3) ◽  
pp. 209-220 ◽  
Author(s):  
David P. Hamilton ◽  
Stuart F. Mitchell
Keyword(s):  
Shallow Lakes ◽  
Empirical Model ◽  
Sediment Resuspension

How climate change and eutrophication interact with microplastic pollution and sediment resuspension in shallow lakes: A review

2020 ◽  
Vol 705 ◽  
pp. 135979 ◽  
Author(s):  
Yafei Zhang ◽  
Jie Liang ◽  
Guangming Zeng ◽  
Wangwang Tang ◽  
Yue Lu ◽  
...  
Keyword(s):  
Climate Change ◽  
Shallow Lakes ◽  
Sediment Resuspension

Wind Resuspension of Sediments in a Prairie Lake

1984 ◽  
Vol 41 (12) ◽  
pp. 1763-1767 ◽  
Author(s):  
Glenn L. Carper ◽  
Roger W. Bachmann
Keyword(s):  
Shallow Lakes ◽  
Suspended Solids ◽  
Sediment Resuspension ◽  
Wave Theory ◽  
Wind Effects ◽  
Wind Velocities ◽  
Critical Velocities ◽  
Wind Mixing

We measured levels of inorganic suspended solids in Little Wall Lake, Iowa, and concluded that sediment resuspension occurred when wind velocities exceeded critical velocities as calculated from wave theory. The percentages of the lake bed subject to resuspension for winds of given velocities were calculated, as were the percentages of time that winds of such velocities could be expected. We concluded that only a small percentage of the lake bed is subject to resuspension most of the time. The techniques to calculate wind effects and to summarize the data on frequency of wind mixing used in this study should be generally applicable to problems of sediment resuspension in other shallow lakes.

scholarly journals Assessment of Wind-Induced Sediment Resuspension Zones in the Patzcuaro Lake Using Empirical Equations

2019 ◽  
pp. 1-9
Author(s):  
Felícitas Calderón-Vega ◽  
José-Alfredo González-Verdugo
Keyword(s):  
Water Depth ◽  
Shallow Lakes ◽  
Sediment Resuspension ◽  
Middle Part ◽  
Empirical Equations ◽  
Wind Force ◽  
The North ◽  
Long Duration ◽  
Last Stage

Aims: An analysis to determine sediment resuspension zones in the Patzcuaro lake (Mexico) through empirical equations is carried out. Place and Duration of Study: The study was carried out at the Patzcuaro Lake in Michoacán, Mexico. The last stage of the project was finished during January 2019. Methodology: The site wind force is considered as the main cause inducing the resuspension. Wind data recorded at two near stations (Chupícuaro and Pacanda) were processed and the main wind directions, in terms of intensity and duration, were obtained. Additionally, wind-induced wave values and the initial depth for the resuspension phenomenon were computed. Finally, bathymetry maps are plotted to indicate the zones where sediment resuspension occurs in the lake for the minimum water depth scenario concurrent with maximum winds and a sufficiently long duration to generate resuspension. Results: Towards the north zone a larger particles motion is observed in the lakes riviera, form 5 m depth to the shore. In the middle part of the lake a larger incidence of the resuspension phenomenon is exhibited, since it is developed for all the considered depth levels. In the south part the resuspension is almost absent; only a spot between the Tecuén and Janitzio Islands show resuspension. Conclusion: The empirical equations are a useful alternative to evaluate the quality of shallow lakes in terms of sediment resuspension.

scholarly journals Alternative Attractors of Shallow Lakes

2001 ◽  
Vol 1 ◽  
pp. 254-263 ◽  
Author(s):  
Marten Scheffer
Keyword(s):  
Shallow Lakes ◽  
Algal Blooms ◽  
Sediment Resuspension ◽  
Fish Predation ◽  
Fish Stock ◽  
Nutrient Loads ◽  
High Concentration ◽  
Temporary Reduction ◽  
Light Levels ◽  
Turbid State

Ponds and shallow lakes can be very clear with abundant submerged plants, or very turbid due to a high concentration of phytoplankton and suspended sediment particles. These strongly contrasting ecosystem states have been found to represent alternative attractors with distinct stabilizing feedback mechanisms. In the turbid state, the development of submerged vegetation is prevented by low underwater light levels. The unprotected sediment frequently is resuspended by wave action and by fish searching for food causing a further decrease of transparency. Since there are no plants that could serve as refuges, zooplankton is grazed down by fish to densities insufficient to control algal blooms. In contrast, the clear state in eutrophic shallow lakes is dominated by aquatic macrophytes. The submerged macrophytes prevent sediment resuspension, take up nutrients from the water, and provide a refuge for zooplankton against fish predation. These processes buffer the impacts of increased nutrient loads until they become too high. Consequently, the response of shallow lakes to eutrophication tends to be catastrophic rather than smooth, and various lakes switch back and forth abruptly between a clear and a turbid state repeatedly without obvious external forcing. Importantly, a switch from a turbid to a stable clear state often can be invoked by means of biomanipulation in the form of a temporary reduction of the fish stock.

scholarly journals The Influence of Ship Waves on Sediment Resuspension in the Large Shallow Lake Taihu, China

2020 ◽  
Vol 17 (19) ◽  
pp. 7055
Author(s):  
Minsheng Bu ◽  
Yiping Li ◽  
Jin Wei ◽  
Chunyan Tang
Keyword(s):  
Shear Stress ◽  
Shallow Lakes ◽  
Lake Taihu ◽  
Sediment Resuspension ◽  
Critical Shear Stress ◽  
Wave Disturbance ◽  
Future Research ◽  
Natural State ◽  
Ship Waves ◽  
Ship Wave

Sediment resuspension induces endogenous nutrient release in shallow lakes, which has been demonstrated to be associated with eutrophication. In addition to natural wind-driven resuspension, navigable shallow lakes (such as Lake Taihu, China) also experience resuspension from human activities, such as ship waves. Both processes determine the intensity, frequency, and duration of sediment resuspension, and may consequently affect the pattern of cyanobacteria blooms in the lake. In this study, acoustic Doppler Velocimeter (ADV), Optical Backscatter Sensor (OBS), and temperature wave tide gauge (instrument model :RBR duo TD|wave) were placed in an observation platform in the lake to obtain high-frequency flow velocities, suspended sediment concentration (SSC), and wave parameters before, during, and after a cargo ship passed by. We found that the ship wave disturbance intensity is greatly influenced by the draft depth. The movement generated by ship disturbance is primarily horizontal rather than vertical. Compared with the wind-induced wave, the disturbance caused by the ship waves has a high intensity, short duration, and narrow range of influence. The maximum total shear stress under ship disturbance can reach 9~90 times the critical shear stress under a natural state. Therefore, the effect of ship waves on sediment resuspension near the channel of Lake Taihu is much greater than that of wind-induced waves. These findings represent an important step towards understanding the quantitative relationship between ship wave disturbance and sediment resuspension, and lay the foundation for future research in order to understand and control the eutrophication of shallow lakes.

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