共查询到20条相似文献，搜索用时 140 毫秒
1.
V. G. Samylina 《Water Resources》2018,45(5):813-818
Objective analysis of water resources development in the territory of Vologda oblast in period from 2005 to 2014 is given. It was found that water withdrawal from water sources decreased by 22.4%, wastewater discharge into water bodies decreased by 22.6%, and the total volume of recycling and successive water use increased by 2.0%. The dynamics of the distribution of water resources between economic sectors is given. Unreasonable water losses were identified in water use systems and their extent was assessed. The main directions in water economy in the production and domestic sectors are determined. Steps for improving the efficiency of water resources development in the region are proposed. 相似文献
2.
A. M. Nikanorov O. B. Bartsev D. N. Gar’kusha E. A. Zubkov L. I. Minina 《Water Resources》2017,44(7):952-962
Underflooding of different extent was recorded in 133 populated localities in southern Rostov oblast, among which 4 such localities are always partly underflooded, and 77 localities suffer underflooding during spring floods and freshets. Minimal estimates show that the area of the territories underflooded every year and only in wet years is 282 km2 or 19% of the total built-up area in the southern Rostov oblast. Technogenic factors were found to dominate as the causes of underflooding in the majority of the populated localities. However, natural or slightly disturbed subsoil water regime is typical of the built-up territories in the southern Rostov oblast, where it implies annual periodicity of level variations with a peak in spring and a minimum in autumn. 相似文献
3.
Water Resources - The effect of a large mining complex of Apatit JSC on the aquatic ecosystem of Lake Imandra is discussed. Hydrochemical data are given to characterize the pollution zone, and the... 相似文献
4.
Marinaite I. I. Sorokovikova L. M. Sinyukovich V. N. Zhuchenko N. A. Onishchuk N. A. Tomberg I. V. 《Water Resources》2022,49(3):458-466
Water Resources - The results of studying present-day oil product concentrations in water of Baikal and its tributaries are given. The highest concentrations of oil products have been identified in... 相似文献
5.
This study is concerned with quantitative estimation of the relationship between earthquakes and tectonic crustal fragmentation
based on a correlation analysis of fault density with seismicity parameters (the number and energy of earthquakes per unit
area) for the Sredne-Yamskoi seismic junction and adjacent area. The highest level of seismic activity and the highest probability
of earthquake occurrence with energy classes K ≥ 12 within areas that have a continental crust with a well-pronounced granite layer occur in those areas with the mean fault
density. Within areas with a thinner granite layer in the crust, the most likely seismic events are K ≥ 12 earthquakes that occur in areas with lower fault density. We estimated the relationship between the degree of crustal
fragmentation and the topography of stratification interfaces in the crust as identified by new interpretative gravimetry.
Zones with the lowest degree of fragmentation tend to be areas where the top of the crystalline basement lies deeper. 相似文献
6.
The results of studies of spatial and seasonal variations in hydrocarbon concentrations in hypertrophic Lake Nero are used to discuss the problem of division of hydrocarbons into anthropogenic and natural components. It is shown that the use of bitumoids as a component of oil pollution instead of total organic matter can introduce errors in the results. Seasonal variations in the activity of hydrobionts in an undisturbed area are shown to have a notable effect on the assessment of the proportion of anthropogenic hydrocarbons in their total concentration, that is, on the assessment of the extent of pollution of water bodies. The natural component is found to dominate over the anthropogenic component only in the periods of algae blooming. In spring and autumn, the total concentration of hydrocarbons was found to exceed the MAC and to be due mostly to natural hydrobiological factors. 相似文献
7.
A. M. Nikanorov D. N. Gar’kusha E. A. Zubkov O. B. Bartsev L. I. Minina 《Water Resources》2018,45(2):205-212
Seasonal dynamics of the mineralization, ionic composition, and the concentrations of specific pollutants in subsoil water are studied in populated localities in the southern Rostov oblast. Four major water types are identified: hydrocarbonate–sulfate (sulfate–hydrocarbonate), sulfate, chloride–sulfate (sulfate–chloride), and mixed type of subsoil water. The quality of subsoil water was found to fail to meet the sanitarytoxicological standards in terms of many characteristics. The values of MAC are exceeded for calcium, magnesium, sodium, chloride and sulfate ions, oil products, cadmium, total iron, silicon, and nitrate and ammonium nitrogen. Relationships were found to exist between the concentrations in water of cadmium, potassium, and phosphorus ions; oil products; pH values; water mineralization and total hardness; and seasonal variations of subsoil water levels. The identified relationships were substantiated. 相似文献
8.
Data of long-term observations of water and hydrochemical regimes were used to characterize relationships between water flow and dissolved solids discharge in the three major tributaries of Lake Baikal, which account for about two-thirds of the total water inflow into the lake. The total dissolved solids content (TDS) of these rivers' water and the concentrations of the principal ions are classified taking into account the relationships between the sources of alimentation. 相似文献
9.
In recent years, the natural hydrology behaviors were greatly influenced by climate change. The relation between runoff and climate change are always the core of scientific hydrological study in arid region. This paper presents a multi-variate time series controlled auto-regressive (CAR) model based on hydrological and climatic data of typical tributaries Jinghe River in Ebinur Lake Basin of Xinjiang covering the period from 1957 to 2012. The aim is to study the climate change and its effects on runoff of the Jinghe River, Northwest China. The results showed the following: the runoff of the Jinghe River was unevenly distributed and has obvious seasonal changes throughout the year. It was concentrated in summer and has along dry season with less runoff. The monthly maximum river runoff was from June to September and accounted for 74% of annual runoff. The river runoff increased since the 1980s till the 1990s; in the 21st century there was a trend of decreasing. The oscillatory period of annual runoff series in the Jinghe River Basin was 21a and 13a, and these periods were more obvious, followed by 32a and 9a. The oscillation with a time scale of 21a and 13a was a fulltimed domain. The MRE is 6.54%, the MAE is 0.84 × 108 m3, and the RMSE is 0.039. The CAR model passed the F-test and residual test, and the change trend of calculated and measured values of annual runoff is consistence, which means that the model was reasonable. 相似文献
10.
Water Resources - In the context of the environmental crisis observed in recent years in some areas in Baikal coastal zone, water chemistry was studied in June 2018 in seven points in this zone at... 相似文献
11.
Water Resources - In the comprehensive management of watersheds, the knowledge of the sedimentation process in flood conditions is considered as an important and challenging issue. The aim of this... 相似文献
12.
O. V. Babanazarova S. I. Sidelev S. M. Zhdanova A. S. Litvinov A. S. Ovseenko K. P. Korovkina 《Water Resources》2018,45(6):897-907
Long-term dynamics of water level in Lake Nero (1930–2011) has been analyzed. Pronounced trends, determined by the climate and anthropogenic components have been identified. Up to the 1970s, at a drop in lake water level, the ecosystem still showed the main features of a shallow water body overgrown with macrophytes. Water level rise caused a more intense development of phytoplankton, an increase in biogenic element concentrations, a decrease in water transparency and the contribution of cyanobacteria of S1 codon; pondweed disappeared almost completely. Step-by-step regression analysis of phytoplankton development indices and hydrological characteristics showed that water transparency in Lake Nero depends by 80% directly on water exchange and inversely on the concentration of chlorophyll a in seston. The main hypothesis of the study was confirmed: the key trigger in phytoplankton–macrophytes competition is water level rise. 相似文献
13.
Rare earth patterns of surface and groundwaters near big cities often show anthropogenic Gd (Gdant) anomalies in addition to geogenic Ce and Y anomalies. The Gdant anomaly is caused by very stable organic complexes, one of which is gadopentetic acid, Gd‐DTPA. Derivatives of this and similar compounds are used as contrast agents in magnetic resonance imaging (MRI) of the human blood system. The organic Gd complexes are stable enough to pass nearly unaffected through sewage treatment plants and are, thereafter, discharged into surface water systems. Water of the rapidly flowing Isarco/Eisack and Adige/Etsch rivers (Provinces of Trento and Bolzano/Bozen, NE Italy) and their tributaries show remarkable variations in anthropogenic Gd contents (Gdant). Low Gdant values are found on Monday and Tuesday, whereas high values are observed during the remaining weekdays. Reliable Gdant balances are calculated for the river system at the confluence of the Adige and its tributaries. At two places local decrease of Gdant indicates exfiltration of groundwater. It is demonstrated that Gdant can be used as a reliably conservative tracer to study the water budget in rapidly flowing alpine river systems. The studied different river waters show considerable negative Ce and positive Y anomalies. Negative Ce anomalies are caused by scavenging of Ce(III) by FeO(OH) precipitates and subsequent oxidation to CeO2. Y anomalies are attributed to less sorption of Y than REE onto particulate matter. Thus, Y moves faster than REE. Both, Ce and Y anomalies, are of geogenic origin. 相似文献
14.
The results of investigations carried out in May, July, September, and November 2000 and 2001 are used to analyze the species composition and biomass structure of phytolankton of 13 tributaries of Lake Ladoga and the Neva River and assess the trophic state of the rivers and their saprobity. 相似文献
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16.
Normal annual data are used to evaluate the within-year variations in the concentrations of biogenic substances (organic and mineral components of N and P, dissolved organic carbon, inorganic Si) in the major tributaries of the Caspian Sea. Variations in the concentrations of biogenic substances are analyzed, the relationships between their mass concentrations in individual months are evaluated, and correlation between the organic and mineral components of N and P and their aggregated fractions are established. The obtained high-significance correlation between the concentrations of N and P components suggests that the rates of biochemical processes of biogenic substance transformation taking place in the water of tributaries are commensurable. 相似文献
17.
Malnik V. V. Timoshkin O. A. Suturin A. N. Onishchuk N. A. Sakirko M. V. Tomberg I. V. Gorshkova A. S. Zabanova N. S. 《Water Resources》2019,46(5):748-758
Water Resources - A sanitary–bacteriological and hydrochemical survey of rivers flowing into Lake Baikal near Listvyanka Settl. was carried out in period from 2014 to 2015. Water quality at... 相似文献
18.
通过对福建华安县汰内井2005年以来的水氡测值进行分析,提取了中期及短期异常,认为这些异常与2006年12月26日台湾屏东海外7.2级地震有关。 相似文献
19.
This paper presents an evaluation of the liquefaction potential of loess in Lanzhou, China, and Memphis, USA. The topography, stratigraphy, and genesis of loess in these two areas were investigated and compared. Several loess samples in each study area were taken and their physical indices were determined. In addition, the microstructures of these loess samples were investigated using an electron microscope, and dynamic triaxial tests were performed using an artificial seismic wave. The results of this investigation indicated that both Lanzhou loess and Memphis loess have a potential for liquefaction, but Memphis loess is less susceptible to liquefaction. Furthermore, Lanzhou loess and Memphis loess behave differently during ground shaking. 相似文献