scholarly journals Linkage of Climatic Factors and Human Activities with Water Level Fluctuations in Qinghai Lake in the Northeastern Tibetan Plateau, China

Water ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 552 ◽  
Author(s):  
Bo Chang ◽  
Kang-Ning He ◽  
Run-Jie Li ◽  
Zhu-Ping Sheng ◽  
Hui Wang
Keyword(s):  
Tibetan Plateau ◽  
Water Level ◽  
Human Activities ◽  
Climatic Factors ◽  
Water Level Fluctuations ◽  
Qinghai Lake ◽  
Northeastern Tibetan Plateau

Wind regime and aeolian landforms on the eastern shore of Qinghai Lake, Northeastern Tibetan Plateau, China

2021 ◽  
Vol 188 ◽  
pp. 104451
Author(s):  
Guangyin Hu ◽  
Zhibao Dong ◽  
Zhengcai Zhang ◽  
Linhai Yang ◽  
Lewei Hao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Qinghai Lake ◽  
Eastern Shore ◽  
Wind Regime ◽  
Northeastern Tibetan Plateau

A comparative study of radiocarbon dating on terrestrial organisms and fish from Qinghai Lake in the northeastern Tibetan Plateau, China

The Holocene ◽  
2018 ◽  
Vol 28 (11) ◽  
pp. 1712-1719 ◽  
Author(s):  
E ChongYi ◽  
YongJuan Sun ◽  
XiangJun Liu ◽  
Guangliang Hou ◽  
ShunChang Lv ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Holocene ◽  
Sediment Cores ◽  
Qinghai Lake ◽  
The Tibetan Plateau ◽  
Fish Bones ◽  
Northeastern Tibetan Plateau ◽  
Animal Bones ◽  
Gymnocypris Przewalskii ◽  
The Difference

Qinghai Lake is the largest lake on the Tibetan Plateau (TP) and in China and has been a focus of paleoenvironmental and climatic research for decades. However, limited understanding of lake 14C reservoir effects (LRE) has led to inconsistent interpretations among proxies of different sediment cores. As such, the onset of LRE variability during the Holocene is still unclear. 14C dating of archeological samples from four locations (Gangcha, Shaliuheqiaoxi, and Shinaihai sites, and Niaodao section) including naked carp ( Gymnocypris przewalskii, Kessler) fish bones, animal bones and teeth, and charcoal was employed to estimate variations in LRE over the last few thousand years. LRE offsets calculated as the difference between LRE of animal bones and fish bones are more reliable than that of charcoal and fish bones due to the ‘old wood’ effect in charcoal. LRE offsets recorded in fish bones were ~0.5, ~0.6, and ~0.7 ka during the periods of 3.0–3.4 cal ka BP, 0.58–0.60 cal ka BP, and modern lake times, respectively, which may indicate a temporal minimum LRE offset. Unlike the wide spatial variations of LRE ages obtained from surface total organic carbon (TOC) samples of the modern Qinghai Lake, LRE offsets from the three contemporaneous locations in Qinghai Lake were all ~0.5 ka, suggesting efficient carbon mixing occurred in naked carp. However, the late-Holocene (~3.1 ka BP) LRE increased slightly with increasing salinity and decreasing lake level.

Landscape reconstruction and the relationship between human and environment in Yaowuyao area, Northeastern Tibetan Plateau since 15000 yr BP

2020 ◽  
Author(s):  
Naimeng Zhang ◽  
Qinghai Xu ◽  
Dongju Zhang ◽  
Ulrike Herzschuh ◽  
Zhongwei Shen ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Human Activity ◽  
Human Activities ◽  
Tibet Plateau ◽  
Qinghai Lake ◽  
Lake Basin ◽  
Human Beings ◽  
Landscape Reconstruction ◽  
Qinghai Lake Basin ◽  
Early Human

<p>Understanding the paleoenvironment (such as climate and landscape) in the area where the early ancient human appears on the Tibetan Plateau is an interesting topic. Based on the results of pollen data on the Yaowuyao loess section of the Qinghai Lake Basin, we used landscape reconstruction algorithms to reconstruct the changes in vegetation cover for 15,000 years. It is shown that the vegetation in the Yaowuyao area changed from temperate steppe (15-7.5 ka) to forest-steppe (7.5-4 ka). Compared with previous studies on the sediment in Qinghai Lake, our study can better reflect the local environment of the Qinghai Lake basin. Furthermore, based on the paleoclimate change data and archeological data from the surrounding areas, it is noticed that while precipitation increases and trees increase, human activities decrease. This may be caused by the substance and strategies of the ancient human beings that have adapted to the steppe. In addition, our results also show that the intensity of ancient human activity has a negative correlation with plant biodiversity, which may be related to human disturbance to the environment. Our paleoecological and environmental study not only shows the paleoenvironment of the early human activities on the Qinghai-Tibet Plateau but also revealed possible early human activity signals.</p>

Assessment of water levels and the effects of climatic factors and catchment dynamics in a shallow subtropical reservoir, Manjirenji Dam, Zimbabwe

2018 ◽  
Vol 10 (3) ◽  
pp. 580-590 ◽  
Author(s):  
Beaven Utete ◽  
Tamuka Nhiwatiwa ◽  
Blessing Kavhu ◽  
Samuel Kusangaya ◽  
Nyashadzashe Viriri ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Climatic Factors ◽  
Integrated Water Resources Management ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Management Approach ◽  
Aquatic Communities ◽  
Resources Management ◽  
Conservation Implications

Abstract Natural water level fluctuations have associated effects on water quality and resident aquatic communities, although their impacts are magnified if the dams have other non-seasonal designated multiple uses. Research demonstrates that excessive water level fluctuations impair ecosystem functioning, ultimately leading to shifts between clear-water and turbid states in shallow lakes. However, these data lack for Manjirenji Dam in Zimbabwe, thus hampering efforts towards effective freshwater resources management in the shallow reservoir. This study analyzed water levels and their fluctuations, and assessed the effects of climatic factors and catchment dynamics using a combination of historical and remote sensed data for the shallow Manjirenji Dam in Zimbabwe. Time series and multiple regression analysis were used to determine water level trends, and the influence of catchment and climatic components in Manjirenji Dam. Lake levels have increased since construction, though their non-significant seasonal variation in the Manjirenji Dam reflects the overlapping effects of catchment and climatic variables. Despite the inferred high stability and resilience, the high fluctuation widths expose the dam to hydrodynamic and climate shocks which have major ecological and conservation implications. A climate change based integrated water resources management approach is necessary for sustainable water resources utilisation in the Manjirenji Dam.

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

scholarly journals Wahania poziomów wody jezior w Polsce w latach 1956–2015 = Water-level fluctuations in Polish lakes in the 1956–2015 period

2020 ◽  
Vol 92 (1) ◽  
pp. 41-54
Author(s):  
Adam Choiński ◽  
Jerzy Jańczak ◽  
Ptak Mariusz
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Climatic Factors ◽  
Kendall Test ◽  
Climatic Conditions ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Anthropogenic Factors ◽  
Local Conditions ◽  
Study Results

Water-level fluctuations are among the primary factors determining the functioning of lakes. The volume to which lake basins are filled with water is of major importance to the courses of many processes and phenomena. A particular amount of water in a lake, and water-table stability, are also important from the point of view of human activity, as these elements help determine the quantity and accessibility of the water resources lakes have to offer, and therefore the possibilities for them to be used by different branches of the economy, e.g. industry, agriculture or tourism. The work detailed here is thus a presentation of trends as regards water-level fluctuations in 16 lakes in Poland, over the period 1956–2015. The study results, obtained for the first time in relation to such a long time scale and extending to around a dozen lakes, aim to point to the scale and direction of water-level fluctuations in times of the intensive transformation of the natural environment. They were obtained by reference to water-level observations made by the Institute of Meteorology and Water Management – National Research Institute (IMiGW-PIB). Specifically, data referring to the (November-October) hydrological year were analysed for trends as regards mean annual water levels using the Mann-Kendall test. Results point to major variability in the courses noted for these levels over the analysed multiannual period. Nevertheless, three overall situations could be designated from within the group of cases analysed, i.e. increase, decrease or lack of a trend. The first group includes Lakes Sławskie, Jamno, Łebsko, Nidzkie, and Studzieniczne (where increases were statistically significant at p=0.05); the second, Lakes Ostrzyckie and Ełckie (decreases significant at p=0.05); and the last group all remaining lakes, i.e. Charzykowskie, Jeziorak and Rajgrodzkie, Biskupińskie, Drwęckie and Białe, Gopło, Roś, and Wigry. It was, however, noted that in many cases analysed periods of alternating increase and decrease in water level were to be observed. The causes of such fluctuations were complex, but inter alia reflected droughts of several years’ duration, periods featuring higher-than-average precipitation, and local conditions. In general, water-level fluctuations in lakes result from natural and anthropogenic factors determining the hydrological conditions in catchments. And in the context of the lakes considered here, the courses of water-level fluctuations were mostly a reflection of local, rather than wider climatic conditions – a fact i.a. illustrated by the lack of cohesive regional designations. The situation is different from that of, for example, the thermal or ice regimes of Polish lakes, in relation to which observed similarities in properties are seen to be determined mainly by climatic factors. Information of this kind may be of key importance to the (quantitative and qualitative) management of water resources in the context of the climate change being observed currently.

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.

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