Effect of Natural and Anthropogenic Factors on Soils,Soil Water,and Subsoil Water in Kola Peninsula     

Motuzova  G. V.  Lukina  N. V.  Nikonov  V. V.  Dauval'ter  M. V.  Zorina  A. V. 《Water Resources》2004,31(3):297-302

The concentrations of mobile compounds of S, Cu, and Ni are determined in podzol soils in the Murmansk region taken at different distances from Severonikel Copper–Nickel Plant and their variations are analyzed. The concentrations are found to have an effect on the distribution of these elements in lysimetric and subsoil waters.  相似文献   

Functioning of the White Sea Ecosystem: Studying the Transformations of Organogenic Substances Using a Mathematical Model   总被引：1，自引：0，他引：1  

Leonov  A. V.  Filatov  N. N.  Zdorovennov  R. E.  Zdorovennova  G. E. 《Water Resources》2004,31(5):511-530

Long-term observational data on hydrology, hydrochemistry, and hydrobiology are generalized and used for systems analysis of the biohydrochemical transformation processes of organic and biogenic substances in a marine environment. An ecological model with the systematized data is used to assess the annual dynamics of concentrations of organic and mineral N, P, and Si compounds and dissolved organic C and O₂ in eight water areas within the White Sea at specified conditions of water mass transport, river runoff, and water exchange with the Barents Sea. Variations in the biomasses of the major transformers of organic and biogenic substances (heterotrophic bacteria, phyto- and zooplankton, and microphytes) and their biological production were also evaluated. These characteristics serve as indicators of the state of the water environment, the presence of nutrients in it, and their import from outside.  相似文献   

Copper (II) Speciation in a Freshwater Ecosystem     

Smolyakov  B. S.  Zhigula  M. V.  Ryzhikh  A. P.  Sinitsyna  E. V.  Ermolaeva  N. I.  Fedotova  A. A. 《Water Resources》2004,31(1):55-63

Results of chemico-biological experiments in a natural water body with the use of model systems with Cu (II) introduced in them at different proportions of its chemical forms (natural and simulated) in the solution. The model forms used in the experiments were Cu complexes with benzyl- and hexadecylmalonic acids, simulating low-molecular dissolved organic substances. The experimental conditions were chosen based on a preliminary calculation using WATEQ–4f program. The complexes of Cu with hexadecylmalonic acid are found to be absorbed by suspensions and removed into bottom sediment more actively than other Cu forms. The toxicity of introduced Cu for the phyto- and zooplanktonic communities is found to depend on the concentration of Cu²⁺ aqua-ions in the solution, in the presence of which the higher concentrations of complexes with malonic acids do not exert their toxic effect.  相似文献   

Environmental Condition of Water Bodies in the Territory of an Oil–Gas Condensate Field (the Pechora Delta)     

Stenina  A. S.  Khokhlova  L. G.  Patova  E. N.  Lytkina  Zh. A. 《Water Resources》2004,31(5):545-552

Chemical characteristics of the surface water and algae in lakes in the Seduiyakha River basin are presented. Specific features of components of limnetic ecosystems under the influence of anthropogenic factors in the territory of an oil–gas condensate field are shown. Ambiguous response of algal communities to changes in the aquatic environment is revealed.  相似文献   

Calculating Sediment Transport in the Coastal Zone of the Sea     

Arkhipov  B. V.  Koterov  V. N.  Kocherova  A. S.  Solbakov  V. V.  Khublaryan  G. M. 《Water Resources》2004,31(1):27-35

The mathematical model described is intended for the prediction of anthropogenic sediment transport in the coastal zone of the sea. Calculation results are presented.  相似文献   

Study of Heavy Metal Compound Transformations in Surface Waters     

Popov  A. N.  Bezzaponnaya  O. V. 《Water Resources》2004,31(1):41-45

Results of studying Fe(III) hydrolysis and sorption of heavy metal compounds by organic matter of bottom sediments are discussed. The rate of Fe(III) hydrolysis is found to be largely determined by the concentration of dissolved organic substances. Values of kinetic parameters are obtained for heavy metal compounds sorption under static and dynamic conditions. Calculating the solubility of Fe, Cu, Cd, Zn, and Pb sulfides allowed the assessment of the amount of metals lost by bottom sediments due to the formation of metal complexes with dissolved organic substances contained in natural waters.  相似文献   

Natural and Human-Induced Variations in Water and Sediment Runoff in the Danube River Mouth     

Levashova  E. A.  Mikhailov  V. N.  Mikhailova  M. V.  Morozov  V. N. 《Water Resources》2004,31(3):235-246

Long-term natural and human-induced variations in water and sediment runoff in the Danube Delta head were studied on the basis of analysis of an extremely long series of observations (1840–2002). A considerable reduction of sediment runoff in the second half of the 20th century related to sediment accumulation in reservoirs was revealed. It was found that human activities had an insignificant impact on the water runoff variations and the period of 1961–2002 turned out to be abnormally water-abundant.  相似文献   

On the Problem of Differential Payment for the Use of Different-Quality Surface Waters in Ukraine     

Chernyavskaya  A. P.  Zhukinskii  V. N.  Burtseva  N. I. 《Water Resources》2004,31(1):103-110

The evolution of views and practical decisions regarding the problem of collecting payment for the use of surface waters with regard to their quality in the former USSR and present-day Ukraine is discussed. A simple and feasible method is proposed for differentitation of regional (basin) rates of payment for the use of surface water in Ukraine with allowance made for its quality assessed based on a system of environmental classifications.  相似文献   

Water Quality Estimation Based on Histological Investigations of Fish: Case Study of Kenozero Lake     

Lukin  A. A.  Sharova  Yu. N. 《Water Resources》2004,31(4):443-449

Specific hydrological and hydrochemical conditions in Kenozero Lake have led to changes in the morphology of fishes at a cellular level. The abnormalities in the function of the respiratory, digestive, and excretory systems were recorded. The degree of pathology depended on the ecological features of the fish. The pathological changes were most pronounced in the gills of the fish species (orfe, perch, and roach) characterized by active mode of life and sensible to oxygen deficiency. The changes in the epithelium of gill filaments had a compensatory significance and were aimed at increasing the area of the functional surface of the gills under the conditions of hypoxia.  相似文献   

Long-Term Variations in the Vertical Thermohaline Structure in Deep-Water Zones of the Caspian Sea     

Tuzhilkin  V. S.  Kosarev  A. N. 《Water Resources》2004,31(4):376-383

Long-term variability in water temperature and salinity in August has been determined for deep-water segments of standard profiles in the Central and Southern Caspian Sea based on data of on-board observations carried out in 1956–2000. Estimates of parameters of the vertical thermohaline structure of waters were obtained for four time intervals. These estimates have been compared to the variability in the main external factors governing the formation of thermohaline regime. Appreciable long-term variations in the vertical thermohaline structure of waters, caused by a nonperiodic alternation of two main types of hydrological processes in the Caspian Sea are revealed. Qualitative characteristics of these two types are presented.  相似文献