scholarly journals Effects of hydrological forcing on short- and long-term water level fluctuations in lake huron-michigan: a continuous wavelet analysis

2021 ◽  
pp. 127164
Author(s):  
Vincent Y.S. Cheng ◽  
Ali Saber ◽  
Carlos Alberto Arnillas ◽  
Aisha Javed ◽  
Agnes Richards ◽  
...  
Keyword(s):  
Wavelet Analysis ◽  
Water Level ◽  
Lake Huron ◽  
Water Level Fluctuations ◽  
Continuous Wavelet ◽  
Short And Long Term

The influence of immersed water level on the short- and long-term mechanical behavior of sandstone

2021 ◽  
Vol 138 ◽  
pp. 104631
Author(s):  
Peizhao Chen ◽  
Shibin Tang ◽  
Xin Liang ◽  
Yongjun Zhang ◽  
Chunan Tang
Keyword(s):  
Mechanical Behavior ◽  
Water Level ◽  
Short And Long Term

scholarly journals What Caused Record Water Level Rise in the Great Lakes?

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Great Lakes ◽  
Water Level ◽  
Water Levels ◽  
Climate Trends ◽  
Modeling Framework ◽  
Water Level Rise ◽  
Short And Long Term ◽  
Insight Into

A new modeling framework offers insight into how specific lakes' water levels respond to short- and long-term climate trends.

scholarly journals Effects of Lake level changes on water quality and fisheries production of Lake Baringo, Kenya

2021 ◽  
Author(s):  
Jacques Walumona ◽  
Boaz Arara ◽  
Cyprian Ogombe ◽  
James Murakaru ◽  
Phillip Raburu ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Level ◽  
Fish Species ◽  
Lake Level ◽  
Water Level Fluctuations ◽  
Regression Analyses ◽  
Lake Level Fluctuations ◽  
Lake Level Changes ◽  
Over Time

The study was conducted in Lake Baringo and determined quantitative relationships between water level changes, water quality, and fishery production for informed lake basin management. Long-term (2008 to 2020) data on water level, water quality, and fisheries yields from Lake Baringo were analyzed using a combination of statistical methods. Linear and waveform regression analyses described patterns of lake level fluctuations over time while, Pearson’s correlation determined the concordance of lake level changes with water quality parameters, landings, and condition of fish species. PCA results grouped the study period into different years based on annual water quality variable levels. LOWESS analysis showed the decline of annual lake level amplitude over time with peak values in 1964 (8.6 m) and 2008 (9.4 m). The waveform regression significantly modeled lake level fluctuations as indexed by annual deviations from the long-term average (DLTM) and showed a 20-year oscillation between peak water levels in the lake. There were significant positive correlations of Water Level Fluctuations (WLFs) with water quality variables and water quality index (WQI) in Lake Baringo. Linear regression analyses showed a significant concordance (p < 0.05) between the annual fishery yield and the rising WLFs (r = 0.66). Overall, the results demonstrate that WLFs of Lake Baringo are a driver of fish species biomass and physico-chemical properties of the lake. We recommend the integration of fisheries yields, water quality assessment, and WLFs modeling at different temporal scales in the management of Afrotropical lake ecosystems

Quantitative Impacts of Lake-Level Stabilization on Material Transfer between Water and Sediment in Newnans Lake, Florida

1993 ◽  
Vol 50 (8) ◽  
pp. 1610-1616 ◽  
Author(s):  
J. F. Gottgens ◽  
T. L. Crisman
Keyword(s):  
Water Level ◽  
Water Level Fluctuations ◽  
Accumulation Rates ◽  
Material Transfer ◽  
Short Term ◽  
Lake Productivity ◽  
Lake Volume ◽  
Water And Sediment ◽  
Kjeldahl Nitrogen

Spillways at lake outlets reduce water-level fluctuations but may accelerate sedimentation in the lake. In eutrophic Newnans Lake, Florida, a transect of sedimentary profiles, dated with 210Pb and 137Cs by γ-ray spectroscopy, showed threefold increases in accumulation rates of organic matter, total Kjeldahl nitrogen (TKN), and total phosphorus (TP) 1200 m lakeward of a spillway since its construction in 1967. Concentrations of TKN and TP increased 3.5 and 2.4 times, respectively, in sediments deposited since 1967. These increases were progressively less at stations farther from the spillway. Postspillway accumulation of TP was focused toward the dam whereas recent TKN deposition was similar lakewide. Flocculent sediment (> 90% water) accumulated at 1.4 cm/yr. Dams designed to reduce water-level fluctuations may provide short-term benefits for lake access and navigation but in the long-term may accelerate deposition of nutrient-rich detritus, reduce lake volume, cloud the water, alter plant communities, and change lake productivity.

Effects of short- and long-term water-level drawdown on the populations and activity of aerobic decomposers in a boreal peatland

2007 ◽  
Vol 13 (2) ◽  
pp. 491-510 ◽  
Author(s):  
KRISTA JAATINEN ◽  
HANNU FRITZE ◽  
JUKKA LAINE ◽  
RAIJA LAIHO
Keyword(s):  
Water Level ◽  
Short And Long Term

scholarly journals Natural and anthropogenic conditions of water level fluctuations in lakes – Lake Powidzkie case study (Central-Western Poland)

2019 ◽  
Vol 40 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Bogumił M. Nowak ◽  
Mariusz Ptak
Keyword(s):  
Water Level ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Anthropogenic Factors ◽  
Water Shortages ◽  
Natural Factors ◽  
Precipitation Increase ◽  
Water Outflow

Abstract The article presents the analysis of water level fluctuations in Lake Powidzkie in the years 1961–2015. The study shows a considerable decrease in mean water levels in the aforementioned multiannual period, averaging 9 cmꞏdecade−1. Such a situation is caused by natural as well as anthropogenic factors, co-determining water relations in the study area. The natural factors include the amount and distribution of precipitation, increase in air temperature and evaporation size, unfavourable relations between the lake and catchment or hydrogeological conditions. Anthropogenic factors particularly include long-term transformations of the natural environment in the region, currently associated with meliorations accompanying the nearby opencast brown coal mines and exploitation of groundwaters for municipal purposes. Water shortages occurring during dry periods were shown not to be compensated in the study area in humid years. This is particularly related to the regional lowering of the aquifer remaining in close relations with Lake Powidzkie. Counteracting the unfavourable hydrological situation is done through hydrotechnical infrastructure which partially limits water outflow from the lake through damming.

scholarly journals Hydrological Regime of the Trans-Baikal Lakes in the conditions of the Changing Climate (Ivano-Arakhleysky Lakes as a Study Case)

2011 ◽  
pp. 4-14
Author(s):  
Keyword(s):  
Water Level ◽  
Climate Changes ◽  
Atmospheric Precipitation ◽  
Hydrological Regime ◽  
Water Level Fluctuations ◽  
Changing Climate ◽  
Long Term Changes ◽  
Study Case ◽  
Ice Water

Long-term changes of temperature of air and atmospheric precipitation in Transbaikalia and their influence on the hydrological regime of the Ivano-Arahleysky lakes are considered in the article. Climate changes have caused rise in temperature of water of lakes, reduction a thickness of ice and duration of standing of ice. Water level fluctuations have cyclic character and depend on long-term changes of atmospheric precipitation.

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