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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Russian Journal of Biological Physics and Chemisrty</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Russian Journal of Biological Physics and Chemisrty</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>АКТУАЛЬНЫЕ ВОПРОСЫ БИОЛОГИЧЕСКОЙ ФИЗИКИ И ХИМИИ</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2499-9962</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">54308</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>ЭКОЛОГИЧЕСКАЯ БИОФИЗИКА</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>ECOLOGICAL BIOPHYSICS</subject>
    </subj-group>
    <subj-group>
     <subject>ЭКОЛОГИЧЕСКАЯ БИОФИЗИКА</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">ACOUSTICAL METHOD FOR ESIMATING WATER BED BIOLOGICAL CONTAMINATION LEVEL</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>АКУСТИЧЕСКИЙ МЕТОД ОЦЕНКИ УРОВНЯ БИОЛОГИЧЕСКОГО ЗАГРЯЗНЕНИЯ ДНА ВОДОЕМА</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Лисютин</surname>
       <given-names>В А</given-names>
      </name>
      <name xml:lang="en">
       <surname>Lisyutin</surname>
       <given-names>V A</given-names>
      </name>
     </name-alternatives>
     <email>vlisiutin@mail.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Ластовенко</surname>
       <given-names>О Р</given-names>
      </name>
      <name xml:lang="en">
       <surname>Lastovenko</surname>
       <given-names>O R</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Петренко</surname>
       <given-names>Н В</given-names>
      </name>
      <name xml:lang="en">
       <surname>Petrenko</surname>
       <given-names>N V</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Севастопольский государственный университет</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Sevastopol State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Севастопольский государственный университет</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Sevastopol State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Севастопольский государственный университет</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Sevastopol State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2018-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2018</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2018-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2018</year>
   </pub-date>
   <volume>3</volume>
   <issue>2</issue>
   <fpage>433</fpage>
   <lpage>440</lpage>
   <history>
    <date date-type="received" iso-8601-date="2018-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2018</year>
    </date>
    <date date-type="accepted" iso-8601-date="2018-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2018</year>
    </date>
   </history>
   <self-uri xlink:href="https://rusjbpc.ru/en/nauka/article/54308/view">https://rusjbpc.ru/en/nauka/article/54308/view</self-uri>
   <abstract xml:lang="ru">
    <p>Наличие газовых пузырьков в дне мелководных морских и пресноводных водоемов существенно снижает скорость звука. Количество газа в дне зависит от микробиологической активности, и поэтому уровень загрязнения является индикатором экологического баланса. В работе предлагается контролировать уровень загрязнения дна методом измерения коэффициента отражения звука или измерения входного импеданса дна. Вычисляются частотно-угловые зависимости коэффициента отражения и частотные зависимости входного импеданса дна. Показывается, что принципиальным моментом верной интерпретации результатов является учет межгранулярного трения и дисперсии скорости звука в морских осадках.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The presence of gas bubbles in the bottom of shallow marine and freshwater reservoirs significantly reduces the speed of sound. The amount of gas in the bottom depends on microbiological activity, and therefore pollution level is an indicator of the ecological balance. It is proposed to control the level of bottom contamination by measuring sound reflection coefficient or measuring the input bottom impedance. The frequency-angular reflection coefficient dependences and frequency dependences of the input bottom impedance are calculated. It is shown that the principal point of the results correct interpretation is the inclusion of intergranular friction and sound velocity dispersion in marine sediments.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>морские осадки</kwd>
    <kwd>дисперсия фазовой скорости</kwd>
    <kwd>межгранулярное трение</kwd>
    <kwd>газонасыщенные осадки</kwd>
    <kwd>коэффициент затухания</kwd>
    <kwd>коэффициент отражения</kwd>
    <kwd>импеданс дна</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>marine sediments</kwd>
    <kwd>phase-velocity dispersion</kwd>
    <kwd>intergranular friction</kwd>
    <kwd>gas-saturated sediments</kwd>
    <kwd>rate of decay</kwd>
    <kwd>reflection coefficient</kwd>
    <kwd>bottom impedance</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
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