Discharge of Salt Groundwater in the Estuary of the Razdol’naya River (Amur Bay) in February 2020     

Semkin  P. Yu.  Tishchenko  P. Ya.  Charkin  A. N.  Pavlova  G. Yu.  Tishchenko  P. P.  Anisimova  E. V.  Barabanshchikov  Yu. A.  Leusov  A. E.  Mikhailic  T. A.  Tibenko  E. Yu.  Chizhova  T. L. 《Water Resources》2021,48(3):345-350

Water Resources - In February 2020, geochemical tracers along with hydrochemical and hydrological characteristics were used to reveal a discharge site of salt groundwaters in the head of the...  相似文献   

Hypoxia of bottom waters of the Razdolnaya River estuary     

Tishchenko  P. Ya.  Semkin  P. Ju.  Tishchenko  P. P.  Zvalinsky  V. I.  Barabanshchikov  Yu. A.  Mikhailik  T. A.  Sagalaev  S. G.  Shvetsova  M. G.  Shkirnikova  E. V.  Shulkin  V. M. 《Doklady Earth Sciences》2017,476(2):1207-1211

The hypoxia of the bottom waters in the Razdolnaya River estuary was observed for the first time in September 2014 during the survey. It is formed as in the seaward part: oxygen is absorbed as a result of destruction of excessive phytoplankton biomass that settles to the bottom and is synthesized on the upper horizon. The high value of primary production in the riverine part of the estuary was caused by the pycnocline formed. Thus, phytoplankton “blooms” above and undergoes destruction beneath the pycnocline. Oxygen is distributed symmetrically in both parts of the estuary with respect to a bar: similar oxygen concentrations, which are maximum on the surface and minimum at the bottom, 300 and <60 μm/L, respectively, are recorded. The anomalies of hydrochemical parameters that have been formed during this process are sharply different in the two parts of the estuary, which most vividly manifests itself in the N/P value and the partial pressure of carbon dioxide pCO₂. The causes of this unique situation are discussed.

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Diagenesis of Organic Matter in Eelgrass (Zostera marina L.) Vegetated Sediments     

Tishchenko  P. Ya.  Khodorenko  N. D.  Barabanshchikov  Yu. A.  Volkova  T. I.  Mar’yash  A. A.  Mikhailik  T. A.  Pavlova  G. Yu.  Sagalaev  S. G.  Semkin  P. Yu.  Tishchenko  P. P.  Shvetsova  M. G.  Shkirnikova  E. M. 《Oceanology》2020,60(3):341-352

Oceanology - In February and July 2014, multidisciplinary geochemical studies of the sediments were carried out at two stations. One of them was located in Voevoda Bight, which has a bottom depth...  相似文献   

Comprehensive Research of the Coastal Water Area of the Sea of Japan and Sea of Okhotsk under the Influence of River Runoff (Cruise 71 of the R/V <Emphasis Type="Italic">Professor Gagarinskii</Emphasis>)     

P. Ya. Tishchenko  V. B. Lobanov  V. M. Shul’kin  V. V. Mel’nikov  I. B. Tsoi  P. Yu. Semkin  P. P. Tishchenko  V. A. Bannov  O. V. Belous  L. E. Vasil’eva  O. A. Elovskaya  S. G. Sagalaev  Yu. V. Fedorets 《Oceanology》2018,58(2):325-327

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Algorithm for Calculating the Mineralization of Riverine Waters and Salinity of Estuarine Waters from Conductivity Data     

Tishchenko  P. Ya.  Stunzhas  P. A.  Pavlova  G. Yu.  Mikhailik  T. A.  Semkin  P. Yu.  Chichkin  R.V. 《Oceanology》2019,59(4):533-540

Oceanology - The empirical relationship between the mineralization of riverine waters and specific conductivity normalized to 15°C was obtained in testing Razdolnaya River water from March...  相似文献   

Water Dynamics and Structure in the Estuary of the Partizanskaya River (Nakhodka Bay,Sea of Japan)     

Semkin  P. Yu.  Tishchenko  P. Ya.  Lobanov  V. B.  Sergeev  A. F.  Barabanshchikov  Yu. A.  Mikhailik  T. A.  Pavlova  G. Yu.  Kostyleva  A. V.  Shkirnikova  E. M.  Tishchenko  P. P.  Chizhova  T. L. 《Water Resources》2019,46(1):29-38

Water Resources - Field studies of the seasonal and daily dynamics of the mixing zone were carried out in the microtidal estuary of the Partizanskaya River. The position of the mixing zone was...  相似文献   

Radium Isotopes and Nutrients in Razdolnaya River Estuary (Amur Bay,the Sea of Japan) in the Period of Summer Flood     

Semkin  P. Yu.  Tishchenko  P. Ya.  Tishchenko  P. P.  Pavlova  G. Yu.  Anisimova  E. V.  Barabanshchikov  Yu. A.  Mikhailic  T. A.  Charakin  A. N.  Shvetsova  M. G. 《Water Resources》2022,49(3):429-439

Water Resources - The activity of dissolved radium isotopes 223Ra, 224Ra, 228Ra, the concentrations of nutrients: ammonium, nitrates, nitrites, phosphates, silicates, total nitrogen, and total...  相似文献   

Generation of acoustic waves during nonlinear interaction of hydroacoustic and electromagnetic fields in the marine environment     

S. V. Semkin  V. P. Smagin  V. N. Savchenko 《Izvestiya Atmospheric and Oceanic Physics》2008,44(2):255-259

The feasibility of generating additional acoustic harmonics in the geomagnetic field during the propagation of an acoustic wave in a conducting medium through a region with a variable electromagnetic field is considered. Two possible mechanisms of such generation are analyzed: a parametric mechanism and a mechanism associated with ponderomotive forces (dynamic). Expressions are derived for three acoustic harmonics generated by a magnetic dipole with a variable magnetic moment.  相似文献   

Paired‐basin comparison of hydrologic response in harvested and undisturbed hardwood forests during snowmelt in central Ontario: II. Streamflow sources and groundwater residence times     

S. S. Monteith  J. M. Buttle  P. W. Hazlett  F. D. Beall  R. G. Semkin  D. S. Jeffries 《水文研究》2006,20(5):1117-1136

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Paired‐basin comparison of hydrological response in harvested and undisturbed hardwood forests during snowmelt in central Ontario: I. Streamflow,groundwater and flowpath behaviour     

S. S. Monteith  J. M. Buttle  P. W. Hazlett  F. D. Beall  R. G. Semkin  D. S. Jeffries 《水文研究》2006,20(5):1095-1116

Impacts of forest harvesting on groundwater properties, water flowpaths and streamflow response were examined 4 years after the harvest using a paired‐basin approach during the 2001 snowmelt in a northern hardwood landscape in central Ontario. The ability of two metrics of basin topography (Beven and Kirkby's ln(a/tan β) topographic index (TI) and distance to stream channel) to explain intra‐basin variations in groundwater dynamics was also evaluated. Significant relationships between TI and depth to potentiometric surface for shallow groundwater emerged, although the occurrence of these relationships during the melt differed between harvested and control basins, possibly as a result of interbasin differences in upslope area contributing to piezometers used to monitor groundwater behaviour. Transmissivity feedback (rapid streamflow increases as the water table approaches the soil surface) governed streamflow generation in both basins, and the mean threshold depths at which rapid streamflow increases corresponded to small rises in water level were similar for harvested (0·41 ± 0·05 m) and forested (0·38 ± 0·04 m) basins. However, topographic properties provided inconsistent explanations of spatial variations in the relationship between streamflow and depth to water at a given piezometer for both basins. Streamflow from the harvested basin exceeded that from the forested basin during the 2001 melt, and hydrometric and geochemical tracer results indicated greater runoff from the harvested basin via surface and near‐surface pathways. These differences are not solely attributable to harvesting, since the difference in spring runoff from the harvested basin relative to the forested control was not consistently larger than under pre‐harvest conditions. Nevertheless, greater melt rates following harvesting appear to have increased the proportion of water delivery to the stream channel via surface and near‐surface pathways. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献