scholarly journals Sedimentary and environmental characteristics of the Gilan–Mazenderan plain, northern Iran: influence of long- and short-term Caspian water level fluctuations on geomorphology

2004 ◽  
Vol 46 (1-4) ◽  
pp. 145-168 ◽  
Author(s):  
Nizamettin Kazancı ◽  
Tirzad Gulbabazadeh ◽  
Suzanne A.G Leroy ◽  
Özden Ileri
Keyword(s):  
Water Level ◽  
Water Level Fluctuations ◽  
Short Term ◽  
Environmental Characteristics ◽  
Northern Iran ◽  
Caspian Water

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.

scholarly journals Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis

2011 ◽  
Vol 9 (4) ◽  
pp. 815-824 ◽  
Author(s):  
Rodrigo Moncayo-Estrada ◽  
Carlos Escalera-Gallardo ◽  
Owen T. Lind
Keyword(s):  
Water Level ◽  
Management Strategies ◽  
High Volume ◽  
Fish Distribution ◽  
Water Level Fluctuations ◽  
Critical Threshold ◽  
Environmental Characteristics ◽  
Species Dominance ◽  
Lake Volume ◽  
Lake Chapala

This study addresses the influence of water-level fluctuations on fish distribution at two temporal scales: seasonal (dry and rainy) and interannual (low and high volume conditions). The analysis of abundance relationships among three zooplanktivore Chirostoma species at fifteen sites in Lake Chapala, Mexico, revealed the significant influence of contrasting conditions (P=0.0002). Seasonally, segregation was more related to species dominance in the dry season and exclusively related to environmental characteristics in the rainy season. Interanually, biotic influence occurred in the shallowest and the deepest episodes of the lake. Environmental characteristics influenced species distribution when the lake reached 25% of its volume. Site, depth, temperature, and salinity were the leading factors influencing fish distribution. These results emphasize the necessity to implement different management strategies according to lake volume, particularly when a critical threshold is reached.

AUTOMATIC WATER LEVEL MONITORING WITH IOT AND LPWAN

2019 ◽  
pp. 95-103
Author(s):  
Krum Videnov ◽  
Vanya Stoykova
Keyword(s):  
Water Level ◽  
Real Time ◽  
Early Warning ◽  
Water Sources ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Level Monitoring ◽  
Water Level Monitoring

Monitoring water levels of lakes, streams, rivers and other water basins is of essential importance and is a popular measurement for a number of different industries and organisations. Remote water level monitoring helps to provide an early warning feature by sending advance alerts when the water level is increased (reaches a certain threshold). The purpose of this report is to present an affordable solution for measuring water levels in water sources using IoT and LPWAN. The assembled system enables recording of water level fluctuations in real time and storing the collected data on a remote database through LoRaWAN for further processing and analysis.

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