共查询到20条相似文献，搜索用时 15 毫秒
1.
N. M. Kalinkina N. A. Berezina A. I. Sidorova N. A. Belkina A. K. Morozov 《Water Resources》2013,40(6):657-666
The results of bioassay and physicochemical analysis of bottom sediments from large water bodies in Northwestern Russia are presented. The water bodies under consideration include Lake Onega, Vygozerskoe Reservoir, and freshwater part of the Neva Estuary (the Eastern Gulf of Finland), which are locally subject to eutrophication and toxic pollution. The potential toxicity of bottom sediments, evaluated by the survival rate of two crustacean species (Gmelinoides fasciatus and Ceriodaphnia affinis) in 7-day tests, varied from high to low values, characterizing 5 quality classes: high, good, moderate, poor, and heavy, with appropriate degrees of toxic pollution from no to very high pollution. Bad zones were identified in the Kondopoga and Petrozavodsk bays of Onega Lake, the northern and southern parts of the Vygozerskoe Reservoir, and the southern part of the Neva Bay near the dam. Bottom sediments were found to have high quality in the open central areas of Lake Onega and the Vygozerskoe Reservoir and in the western part of Neva Estuary. 相似文献
2.
Transformations of lignosulfonates, which form during sulfite pulping, in Onega Lake water are studied. Laboratory modeling and field data were used to evaluate the kinetic and thermodynamic characteristics of this process. The extent of pollution of Kondopoga Bay of Onega Lake by wastewaters from the Kondopoga Integrated Pulp-And-Paper Mill, using sulfite pulping. 相似文献
3.
The physicochemical, toxicological, and teratological properties of bottom sediments in Karelian lakes (Vuontelenjarvi, Suojarvi, Venderskoe, and Chuchjarvi) and Kondopoga Bay of Lake Onega are studied. Bioassay results testify to a high toxicity of bottom sediments in heavily acidified lakes (with the water pH of 5.5 and lower). 相似文献
4.
The distribution of oil hydrocarbons in bottom sediments of Onega Lake was examined. Their qualitative and quantitative composition was examined by methods of IR-spectroscopy and chromatography-mass spectrometry. The background concentrations of oil hydrocarbons in bottom sediments are evaluated and the polluted area is determined. The major regularities in oil hydrocarbon transformations under natural conditions and anthropogenic impact are identified. The quantitative development of the bacterial groups that take part in the transformation of complex organic substances and oil product derivatives in the case of emergency pollution of Petrozavodsk Bay water area by oil products is demonstrated. 相似文献
5.
The problem of eutrophication of the surface water in the Arctic Regions is discussed. The natural hydrochemical indices of the trophic status of lakes are analyzed in connection with the landscape and physiographic features of the Kola Peninsula. The regular features of changes in the hydrochemical indices of the trophic status of lakes and the development of the process of eutrophication are analyzed in the case of subarctic Lake Imandra, which has been polluted with municipal and industrial (phosphorus-containing waste of the apatite production) wastewater for more than fifty years. Criteria are proposed for establishing and assessing water eutrophication in cold climate. 相似文献
6.
Changes in the quantitative and qualitative characteristics of zooplankton in Kondopoga Bay, Lake Onega, under long-term anthropogenic influence are discussed, and the effect of water pollution on changes in the zooplankton community is considered. 相似文献
7.
Qualitative and quantitative analysis of organic components of snow cover is carried out in the influence zone of emissions from a pulp-and-paper mill. The contribution of organic compounds to the pool of emissions of chemical pollutants during the period of snow cover formation is assessed. Criteria for establishing the pollution of natural complexes by organic substances in the influence zone of emissions from a pulp-and-paper mill are suggested. 相似文献
8.
The results of studies of water chemistry carried out in the water body in 1965–2009 are presented. This period features a considerable industrial and agricultural rise in the lake drainage basin, followed by a decline since the 1990s, manifesting themselves in the dynamics of some hydrochemical characteristics of water bodies. The multipurpose use of Onega Lake is shown to cause its pollution and eutrophication. The results of studies are used to evaluate the major components of the external load onto the lake and trends in variations of chemical characteristics under the effect of natural and anthropogenic factors. 相似文献
9.
Water Resources - Macrozoobenthos analyses were used to evaluate the ecological water quality in the Shuya River, a large tributary of Onega Lake, which determines water chemistry in the water... 相似文献
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Amphipods-oligochaetes index has been developed for the assessment of the state of macrozoobenthos in deep-water areas of Lake Onega. By the value of this index, bed areas of Petrozavodsk Bay, which are subject to the effect of municipal wastewaters, tank farm, rivers within the city boundaries, and the Shuya R., a large tributary of Lake Onega, show a high degree of transformation of zoobenthos community and highest pollution. The ratios of the major zoobenthos groups (amphipods and oligochaetes) in the central part of Petrozavodsk Bay and on its northern shore is at the natural level, but their abundance is dozens of times greater than that in background areas of Lake Onega. A reliable correlation was found to exist between the values of amphipods-oligochaetes index and the redox potential of the top layer of bottom sediments. 相似文献
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13.
L. A. Rukhovets G. P. Astrakhantsev A. N. Mal’gin V. N. Poloskov A. Yu. Terzhevik N. N. Filatov 《Water Resources》2006,33(5):511-522
The results of numerical modeling of Onega Lake climatic circulation are presented. The model used in this study was developed earlier and successfully applied to the reproduction of large-scale hydrodynamical processes in Ladoga Lake. The obtained results are of importance for the development of both models of nonreactive pollutant transport and ecosystem models of the water body. The developed model can be used to calculate currents and temperature fields for individual scenarios of external impacts on the water body, and the results of calculation of the climatic circulation can serve as initial approximations for scenario-based calculations. 相似文献
14.
In the present study assessment of physicochemical and bacteriological parameters of Lake Fateh Sagar of Udaipur (Rajasthan), India was done. Water samples were collected during different seasons for analysis of physicochemical parameters such as pH, temperature, total alkalinity, total hardness, dissolved oxygen, biological oxygen demand and chemical oxygen demand. In addition, the bacteriological analysis like total bacterial and coliform count was detected. Incidences of Escherichia coli and their antibiotic resistance pattern were analyzed, which is the major microbiological indicator of faecal contamination. The values of some physicochemical and many of the bacteriological parameters were found above the permissible limits for drinking water recommended by World Health Organization. E. coli isolates were identified by morphological, biochemical and molecular characteristics using E. coli specific 16S rRNA gene based primers namely 16E1, 16E2 and 16E3 and universal primers namely 27F and 1492R by PCR. It was found that most of E. coli strains were strongly resistant to kanamycin, ampicillin, cefixime, polymyxin B, penicillin, vancomycin, rifampicin and streptomycin. The study of water quality is of significant value because the drinking water supply of the city is dependent on this lake and present study indicated that the lake water is polluted with reference to these analyzed parameters. 相似文献
15.
Water Resources - Data of field measurements of water level variations and current velocities in Petrozavodsk Bay, Lake Onega, made in 2016–2017, are analyzed. Water level variations were... 相似文献
16.
M. B. Zobkov 《Water Resources》2012,39(1):90-97
A method was developed for the search of anomalies in water chemistry with the use of desirability functions. The method allows
one to assess, in automatic mode, the degree of deviation of water chemistry from regional averages derived from field observation
data in unpolluted water bodies in the region. The method was used to identify anomalous deviations of water ionic composition
and N forms from regional averages for some water bodies in the Republic of Karelia (the Kenti River system, water bodies
of Zaonezhskii Peninsula, Onega Lake), caused by both anthropogenic effect and specific natural conditions of water chemistry
formation. 相似文献
17.
湖泊氮、磷通量是表征湖泊营养状态的重要指标,也是探究湖泊富营养化机制的重要途径.通过氮、磷通量的计算和质量平衡关系的分析,可以识别出在湖泊富营养化过程中起关键作用的过程.以三维水动力-水质模型为计算平台,模拟湖泊水动力、水质的动态过程,并以模拟结果为基础核算湖泊氮、磷循环通量及其在氮、磷循环整体中的贡献,识别湖泊氮、磷循环关键源汇过程的变化规律.滇池是我国富营养化湖泊的代表,同时其半封闭特性为营养物质循环提供了更为稳定的环境,以滇池为案例,基于前期校正和验证过的滇池水动力-水质模型来分析循环通量计算方法的适用性.结果发现,研究年度内滇池外海总氮的年总输入量(包括外源和内源)为7620.92 t,总输出量(包括出流、反硝化和沉降)为7637.31 t;总磷的年总输入量为(包括外源和内源)450.23 t,总输出量(包括出流和沉降)为429.57 t,其中陆域输入是最主要的氮、磷输入途径,而反硝化和沉降则是主要的输出过程.相较于传统的质量平衡方法,通过三维模型计算所得的营养盐通量平衡结果能更好地揭示湖体内所发生的氮、磷转化过程. 相似文献
18.
Structural approach to the analysis of sulfur forms concentrations in bottom sediment in three reaches of the Northern Dvina River located near Arkhangelsk and Solombala pulp-and-paper mills (APPM and SPPM, respectively) was used to show that combining all the available data, when searching for relationships between the characteristics, is non-constructive. The correlation between the characteristics of the right and left banks and the delta are shown to be different. The effect of APPM wastewater is shown to disturb the chain of transformations of sulfate and sulfide sulfur forms in bottom sediment at the left bank of the river and enhance the oxidation of reduced sulfur compounds. 相似文献
19.
滇池水质时空特征及与流域人类活动的关系 总被引：8，自引：4，他引：4
湖泊水质与人类活动有着密切的关系,人类活动是湖泊水质恶化的驱动因素.本文在分析1999-2009年滇池水质时空变化特征的基础上,以受人类干扰的土地比例、城镇与湖岸的距离、人口密度、单位土地GDP作为陆地人类活动压力的表征指标,通过对比分析研究滇池水质与人类活动的关系.结果表明:滇池的草海部分和外海部分水质差异显著,草海水质整体较差且呈逐年下降趋势,外海NH3-N、TN、TP浓度明显低于草海,且随时间的变化较小,外海CODMn略低于草海,年际变化与草海相似.城镇用地比例、人口密度、单位土地GDP是草海与外海水质相差悬殊的主导因子;草海汇水区城镇扩张、人口和GDP产值的飞速增长导致草海污染物浓度大幅增加,而河流截污工程、农业农村面源污染的有效控制使外海NH3-N、TN、TP上升不明显甚至有下降趋势. 相似文献
20.
Xia Zhang Qianru Chen Chuan Wang Hongpei Zhang Yuqing Zhao Liping Zhang Biyun Liu Zhenbin Wu Qiaohong Zhou 《国际泥沙研究》2021,36(2):221-228
The process of urbanization aggravates the endogenous pollution of urban lake sediment,and polluted sediment may seriously affect the quality of the water in lakes.At present,it is difficult to distinguish the difference between sediment that is heavily polluted by nitrogen(N)and phosphorus(P)when using an analysis based on a physicochemical index classification.The current study applied phospholipid fatty acid(PLFA)technology to further analyze the sediment characteristics from the perspective of microbiology.Surface sediment from five urban lakes that are heavily polluted with N and P in Wuhan were sampled.Statistical approaches were used to analyze the microbial community structure in the sampled sediment,and to determine the correlations between the microorganisms and physicochemical indices.The most severely polluted lake sediment had similar PLFA structures,the highest saturated fatty-acid content,and bacteria as the dominant microorganism.However,there were differences between the microbial biomass of the various sediment samples,which may have been related to the degree of N and P pollution.Analysis of the microbial diversity in the sediment samples indicated that the bacteria were experiencing starvation and nutrient pressure,which may have been due to the dissolved oxygen concentration of the heavily polluted lake sediment.A correlation analysis showed that the endogenous N and P had different effects on the microbes of the polluted sediment.A redundancy analysis(RDA)demonstrated that the N/P ratio had the greatest influence on the PLFA species,accounting for 83%of the cumulative interpretation.To effectively promote the role of sediment microorganisms on circulating elements,it is necessary to regulate the N/P ratio of the sediment to some extent.When the N/P ratio in sediment exceeds 6,N pollution should be prioritized. 相似文献