Eddy-driven flows over varying bottom topography in natural water bodies

2006 ◽  
Vol 55 (4) ◽  
pp. 235
Author(s):  
J Heinloo
Keyword(s):  
Natural Water ◽  
Bottom Topography ◽  
Water Bodies ◽  
Natural Water Bodies

Assessment of the Influence of the Invasive Species Pistia stratiotes (Araceae) on Some Species of Submerged Macrophytes of Natural Water Bodies of Ukraine

2017 ◽  
Vol 53 (5) ◽  
pp. 75-84
Author(s):  
O. P. Olkhovich ◽  
N. Yu. Taran ◽  
N. B. Svetlova ◽  
L. M. Batsmanova ◽  
M. V. Aleksiyenko ◽  
...  
Keyword(s):  
Invasive Species ◽  
Natural Water ◽  
Submerged Macrophytes ◽  
Water Bodies ◽  
Pistia Stratiotes ◽  
Natural Water Bodies

scholarly journals Reply: Potential discharge, attenuation and exposure risk of SARS-CoV-2 in natural water bodies receiving treated wastewater

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Manish Kumar ◽  
Md Alamin ◽  
Keisuke Kuroda ◽  
Kiran Dhangar ◽  
Akihiko Hata ◽  
...  
Keyword(s):  
Natural Water ◽  
Water Bodies ◽  
Treated Wastewater ◽  
Exposure Risk ◽  
Natural Water Bodies

On methodological approaches to the improvement of surface water bodies and target indicators of the natural waters’ quality

2021 ◽  
Vol 27 (1) ◽  
pp. 6-14
Author(s):  
V. Zaslonovsky ◽  
◽  
N. Sharapov ◽  
M. Bosov ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Natural Water ◽  
Aquatic Ecosystems ◽  
Natural Waters ◽  
Water Bodies ◽  
Surface Water Bodies ◽  
Methodological Approaches ◽  
Natural Water Bodies

The paper is devoted to the development of proposals concerning the improvement of surface water bodies and the appointment of target indicators of the natural waters’ quality. The paper considers a variety of problems of preserving, restoring and improving the quality of natural surface waters: from regional features of the formation of natural water composition, to differences in the requirements for the quality of water consumed. The object of the study is the qualitative indicators of the waters of natural water bodies, and the subject of the study is the methodological approaches to the normalization of these indicators. The purpose of the work is to identify the main shortcomings in the domestic system of rationing the quality of natural waters, and to form appropriate proposals. For this purpose, the following tasks were set and solved: to review the methodological approaches to assessing and rationing the quality of natural waters used in some foreign countries and in the Russian Federation, to identify the main causes and shortcomings; to make proposals for improving the current system of water quality rationing. The result of this work is the conclusions about the lack of impact of the strategy operating in Russia in the development of schemes of complex use and protection of water objects, standards of permissible impact on water bodies, the appointment of permissible discharge limits in terms of maintaining and improving the water quality of natural water bodies. The reasons that led to this are indicated. The necessity of taking into account, in addition to the physical and chemical composition, also hydrobiological parameters is shown. It is concluded that instead of fisheries management standards, environmental standards should serve as the basis for target indicators of water quality of natural water bodies, which determine the well-being of humans and the stable functioning of aquatic ecosystems, taking into account regional factors. Proposals were made to adjust the methodological approaches to the implementation of this strategy. According to the authors, these proposals will speed up the solution of the main objectives of the strategy – the ecological improvement of water bodies, the preservation of unique aquatic ecosystems and the environmentally safe development of territories that previously experienced relatively small anthropogenic impacts (Eastern Siberia and the Far East)

Anti-algal activity of a fluorine-doped titanium oxide photocatalyst against Microcystis aeruginosa and its photocatalytic degradation

2021 ◽  
Vol 45 (37) ◽  
pp. 17483-17492
Author(s):  
Xuechun Wei ◽  
Hongxiang Zhu ◽  
Jianhua Xiong ◽  
Wenyu Huang ◽  
Ji Shi ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Titanium Oxide ◽  
Microcystis Aeruginosa ◽  
Natural Water ◽  
Water Bodies ◽  
Algae Removal ◽  
Removal Efficiencies ◽  
Natural Water Bodies

Fluorine-doped TiO2 was successfully synthesised and applied as algaecide. Studies on algae removal efficiencies and mechanisms illustrated that F-TiO2 was suitable for algae elimination in natural water bodies.

Indigenous Traditional Knowledge in West Jaintia Hills District, Meghalaya

2019 ◽  
Vol 6 (1) ◽  
pp. 37-44
Author(s):  
Diangbha Passah
Keyword(s):  
Traditional Knowledge ◽  
Natural Water ◽  
Local Population ◽  
Value Added ◽  
Water Bodies ◽  
Local Application ◽  
Fish Poison ◽  
Jaintia Hills ◽  
Application Methods ◽  
Natural Water Bodies

Abstract: Indigenous Traditional Knowledge (ITK) is local application methods practiced in different sectors especially in fisheries by local population from time immemorial with some changes from time to time. Many of the ITKs are based on scientific values but they are not well documented. The present study aimed to evaluate the Indigenous Traditional Knowledge practiced in West Jaintia Hills District of Meghalaya. The ITKs identified are divided in three different groups. They are ITK in value added product, ITKs used as fish baits and fish poison and ITKs used as gear for catching fishes from natural water bodies. Keywords: ITK, Jaintia Hills District, Fish poison, Gear, Value added product.

scholarly journals Methodology for cadastral valuation of agricultural lands occupied by water bodies

2020 ◽  
Vol 175 ◽  
pp. 06014 ◽  
Author(s):  
Kirill Zhichkin ◽  
Vladimir Nosov ◽  
Lyudmila Zhichkina ◽  
Mira Alborova ◽  
Aleksey Kuraev
Keyword(s):  
Natural Water ◽  
Agricultural Land ◽  
Water Bodies ◽  
Added Value ◽  
Hydraulic Structures ◽  
Agricultural Lands ◽  
Land Plot ◽  
The Right ◽  
Artificial Water ◽  
Natural Water Bodies

The article considers features of cadastral valuation of agricultural lands occupied by water bodies. The research is based on natural water bodies of the Samara region water fund. A methodology for determining the cadastral value of agricultural lands occupied by artificial water bodies is proposed. The methodology links the land value with the size of the land plot, profit and such objects as dams and other hydraulic structures located within the land plot. The paper confirmed the suggestion that the owner of the land that shall be used for the construction of a pond has the right to the added value of land in the amount of return rate of contributed capital (26.28%). The cadastral value of 1 square meter of agricultural land is 3.11 rubles.

scholarly journals Piscivorous Bird Use of Aquaculture and Natural Water Bodies in Mississippi

2020 ◽  
Vol 84 (8) ◽  
pp. 1560-1569 ◽  
Author(s):  
Paul C. Burr ◽  
Jimmy L. Avery ◽  
Garrett M. Street ◽  
Bronson K. Strickland ◽  
Brian S. Dorr
Keyword(s):  
Natural Water ◽  
Water Bodies ◽  
Piscivorous Bird ◽  
Natural Water Bodies

scholarly journals Distribution of Antibiotic Resistance Genes in Three Different Natural Water Bodies-A Lake, River and Sea

2020 ◽  
Vol 17 (2) ◽  
pp. 552 ◽  
Author(s):  
Sicong Su ◽  
Chenyu Li ◽  
Jiping Yang ◽  
Qunying Xu ◽  
Zhigang Qiu ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Resistance Genes ◽  
Natural Water ◽  
Poyang Lake ◽  
Antibiotic Resistance Genes ◽  
Water Bodies ◽  
Human Beings ◽  
Absolute Abundance ◽  
Haihe River ◽  
Natural Water Bodies

Currently, due to abuse in the use of human antibiotics and the weak regulatory control that the authorities have over sewage discharge and manure management, antibiotic resistance genes (ARGs) have become a new type of environmental pollutant. Three different natural water bodies (Poyang Lake, Haihe River and Qingdao No.1 Bathing Beach seawater) were sampled during the same periods to conduct a longitudinal comparison of distribution. The distribution and expression of 11 ARGs in 20 species were studied, and the correlations between the expression and the distribution of time and space of the ARGs in different water bodies were also analyzed. With the exception of ermA, blaNDM-1 and vanA, which were not detected in seawater, the other ARGs could be detected in all three water bodies. Tetracycline resistance genes (tetC, tetM and tetQ) in the seawater and Haihe River had even reached 100%, and sulfa ARGs (sul1 and sul2) in the seawater and Poyang Lake, as well as sul2 and sul3 in the Haihe River, had also reached 100%. The ARG pollution in Haihe River was much more serious, since 14 and 17 of 20 ARG species were significantly higher compared with seawater and Poyang Lake, respectively. Some ARGs also had a high absolute abundance. The absolute abundance of macrolide resistance genes (ermB) in seawater was as high as 8.61 × 107 copies/L, and the anti-tuberculosis resistant genes (rpoB and katG) in the Haihe River Basin were highly abundant at 1.32 × 106 copies/L and 1.06 × 107 copies/L, respectively. This indicates that ARGs have gradually become more diverse and extensive in natural water bodies. The results of a redundancy analysis (RDA) of the three water bodies showed that although each water body is affected by different factors in space and time, overall, the presence of AGRs is closely related to the production and life of human beings and the migration of animals.

Sign in / Sign up

Export Citation Format

Share Document