scholarly journals Hydrological trend of Qinghai Lake over the last 60 years: driven by climate variations or human activities?

2018 ◽  
Vol 10 (3) ◽  
pp. 524-534 ◽  
Author(s):  
Hongmei Dong ◽  
Yougui Song ◽  
Maosheng Zhang
Keyword(s):  
Water Level ◽  
Water Body ◽  
Human Activities ◽  
Qinghai Lake ◽  
Lake Area ◽  
Lake Water Level ◽  
Total Runoff ◽  
Total Water Consumption ◽  
Hydrological Changes ◽  
Increasing Trends

Abstract Qinghai Lake, as the largest saline inland lake in China, plays an important role in the surrounding semi-arid ecosystem. In recent years, the lake water level has increased rapidly; however, the driving factors causing water body changes are not fully understood. This study aims to investigate the hydrological processes in Qinghai Lake from 1959 to 2016, and to discuss their possible linkages to climatic change and human activity. The results indicate that both the water level and lake area gradually declined to their minima in 2004, before increasing rapidly. Annual evaporation and total runoff vary widely, but have shown an overall shift from decreasing to increasing trends. The annual average temperature has followed an increasing trend, and annual precipitation has increased rapidly since 2004. Hydrological changes (water level and lake) are positively correlated with runoff inflow into the lake and negatively correlated with evaporation from the lake surface. The water body expansion in recent years can be attributed to the decreasing difference between precipitation/river runoff and evaporation. The total water consumption by human activities has had a limited contribution to the water body changes. We conclude that hydrological changes have depended more on climatic variations than on human activities.

Lake water level response to drought in a lake-rich region explained by lake and landscape characteristics

2020 ◽  
Vol 77 (11) ◽  
pp. 1836-1845
Author(s):  
K. Martin Perales ◽  
Catherine L. Hein ◽  
Noah R. Lottig ◽  
M. Jake Vander Zanden
Keyword(s):  
Climate Change ◽  
Water Level ◽  
Lake Water ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Lake Area ◽  
Lake Water Level ◽  
Landscape Characteristics ◽  
Lake Ecology ◽  
Coarse Woody Habitat

Climate change is altering hydrologic regimes, with implications for lake water levels. While lakes within lake districts experience the same climate, lakes may exhibit differential climate vulnerability regarding water level response to drought. We took advantage of a recent drought (∼2005–2010) and estimated changes in lake area, water level, and shoreline position on 47 lakes in northern Wisconsin using high-resolution orthoimagery and hypsographic curves. We developed a model predicting water level response to drought to identify characteristics of the most vulnerable lakes in the region, which indicated that low-conductivity seepage lakes found high in the landscape, with little surrounding wetland and highly permeable soils, showed the greatest water level declines. To explore potential changes in the littoral zone, we estimated coarse woody habitat (CWH) loss during the drought and found that drainage lakes lost 0.8% CWH while seepage lakes were disproportionately impacted, with a mean loss of 40% CWH. Characterizing how lakes and lake districts respond to drought will further our understanding of how climate change may alter lake ecology via water level fluctuations.

The Dynamic of Qinghai Lake Area for Remote Sensing Monitoring and the Analysis of its Driving Force

2014 ◽  
Vol 971-973 ◽  
pp. 2162-2167
Author(s):  
Bao Kang Liu ◽  
Yu E Du ◽  
Ai Jun Hu
Keyword(s):  
Remote Sensing ◽  
Water Body ◽  
Driving Force ◽  
Qinghai Lake ◽  
Lake Area ◽  
Body Area ◽  
Large Lakes ◽  
Important Means ◽  
Area Variation ◽  
Environmental Mitigation

Remote sensing (RS) and geographic information system (GIS) are an important means of monitoring water body areas for large lakes and water reservoirs. This study is based on environment and mitigation satellite CCD data characteristics of China's own R & D, using the combining method of multi-band and single-band to construct a water body identification patterns based on environmental mitigation satellite and extracting the water body area of Qinghai Lake since the September of 2008 to 2011 during April - November each year. Then the variations characters of the annual, seasonal and monthly were analyzed during 2008 and 2011. At last, induced its driving force of area variation of Qinghai Lake.

scholarly journals Impact of human activities on the decline of water level,Qinghai Lake

1992 ◽  
Vol 4 (3) ◽  
pp. 32-37 ◽  
Author(s):  
Zhou Lihua ◽  
◽  
Chen Guichen ◽  
Peng Min
Keyword(s):  
Water Level ◽  
Human Activities ◽  
Qinghai Lake

EWOLUCJA POWIERZCHNI I RZĘDNEJ ZWIERCIADŁA WODY JEZIORA MIEDZNO

2019 ◽  
Vol XII ◽  
pp. 1-1
Author(s):  
Zygmunt Miatkowski ◽  
Paweł Pepliński
Keyword(s):  
Water Level ◽  
19Th Century ◽  
Lake Water ◽  
Water Surface ◽  
Lake Area ◽  
Lake Surface ◽  
Lake Water Level ◽  
Level Elevation ◽  
Lake Surface Area ◽  
The 19Th Century

The changes in area size and elevation of water surface of the Miedzno lake were studied in the paper. The study was carried out on the basis of the analysis of archival cartographic materials, technical documentations and published works. From the first half of the 19th century the Miedzno lake area was about 125 - 135 ha and the lake water level elevation approx. 85.0 m a.s.l. In the period from the mid-19th century to the 1990s the Miedzno lake water table elevation decreased to about 81.0 m a.s.l. and the lake surface area decreased to approx. 8-10 ha.

Evaluation of land use sustainability in Qinghai Lake area

2009 ◽  
Vol 17 (5) ◽  
pp. 1017-1022 ◽  
Author(s):  
Wen-Zheng YU ◽  
Fu-Tian QU ◽  
Ying-Xiang QI ◽  
Guo-Feng YU ◽  
Jun SHI
Keyword(s):  
Land Use ◽  
Qinghai Lake ◽  
Lake Area

scholarly journals The effects of ENSO, climate change and human activities on the water level of Lake Toba, Indonesia: a critical literature review

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Hendri Irwandi ◽  
Mohammad Syamsu Rosid ◽  
Terry Mart
Keyword(s):  
Climate Change ◽  
Water Level ◽  
Human Activities ◽  
Southern Oscillation ◽  
Climatic Conditions ◽  
Water Levels ◽  
Dominant Factor ◽  
Climate Projections ◽  
Continuous Increase ◽  
The Future

AbstractThis research quantitatively and qualitatively analyzes the factors responsible for the water level variations in Lake Toba, North Sumatra Province, Indonesia. According to several studies carried out from 1993 to 2020, changes in the water level were associated with climate variability, climate change, and human activities. Furthermore, these studies stated that reduced rainfall during the rainy season due to the El Niño Southern Oscillation (ENSO) and the continuous increase in the maximum and average temperatures were some of the effects of climate change in the Lake Toba catchment area. Additionally, human interventions such as industrial activities, population growth, and damage to the surrounding environment of the Lake Toba watershed had significant impacts in terms of decreasing the water level. However, these studies were unable to determine the factor that had the most significant effect, although studies on other lakes worldwide have shown these factors are the main causes of fluctuations or decreases in water levels. A simulation study of Lake Toba's water balance showed the possibility of having a water surplus until the mid-twenty-first century. The input discharge was predicted to be greater than the output; therefore, Lake Toba could be optimized without affecting the future water level. However, the climate projections depicted a different situation, with scenarios predicting the possibility of extreme climate anomalies, demonstrating drier climatic conditions in the future. This review concludes that it is necessary to conduct an in-depth, comprehensive, and systematic study to identify the most dominant factor among the three that is causing the decrease in the Lake Toba water level and to describe the future projected water level.

Lake water level modeling using newly developed hybrid data intelligence model

2020 ◽  
Vol 141 (3-4) ◽  
pp. 1285-1300 ◽  
Author(s):  
Zaher Mundher Yaseen ◽  
Shabnam Naghshara ◽  
Sinan Q. Salih ◽  
Sungwon Kim ◽  
Anurag Malik ◽  
...  
Keyword(s):  
Water Level ◽  
Lake Water ◽  
Lake Water Level ◽  
Hybrid Data

Lake and inland dunes as interconnected Systems: The story of Lake Tresssee and an adjacent dune field (Schleswig-Holstein, North Germany)

The Holocene ◽  
2020 ◽  
pp. 095968362098168
Author(s):  
Christian Stolz ◽  
Magdalena Suchora ◽  
Irena A Pidek ◽  
Alexander Fülling
Keyword(s):  
Water Level ◽  
Bronze Age ◽  
Environmental Changes ◽  
High Water ◽  
Alluvial Fan ◽  
Water Levels ◽  
Lake Area ◽  
Dune Field ◽  
The North ◽  
Sand Drift

The specific aim of the study was to investigate how four adjacent geomorphological systems – a lake, a dune field, a small alluvial fan and a slope system – responded to the same impacts. Lake Tresssee is a shallow lake in the North of Germany (Schleswig-Holstein). During the Holocene, the lake’s water surface declined drastically, predominately as a consequence of human impact. The adjacent inland dune field shows several traces of former sand drift events. Using 30 new radiocarbon ages and the results of 16 OSL samples, this study aims to create a new timeline tracing the interaction between lake and dunes, as well, as how both the lake and the dunes reacted to environmental changes. The water level of the lake is presumed to have peaked during the period before the Younger Dryas (YD; start at 10.73 ka BC). After the Boreal period (OSL age 8050 ± 690 BC) the level must have undergone fluctuations triggered by climatic events and the first human influences. The last demonstrable high water level was during the Late Bronze Age (1003–844 cal. BC). The first to the 9th century AD saw slightly shrinking water levels, and more significant ones thereafter. In the 19th century, the lake area was artificially reduced to a minimum by the human population. In the dunes, a total of seven different phases of sand drift were demonstrated for the last 13,000 years. It is one of the most precisely dated inland-dune chronologies of Central Europe. The small alluvial fan took shape mainly between the 13th and 17th centuries AD. After 1700 cal. BC (Middle Bronze Age), and again during the sixth and seventh centuries AD, we find enhanced slope activity with the formation of Holocene colluvia.

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