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        <identifier>oai:hiroshima.repo.nii.ac.jp:02023685</identifier>
        <datestamp>2025-06-04T07:34:08Z</datestamp>
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          <dc:title xml:lang="ja">海砂利採取船から排水される高濁度水中の微粒子の拡散</dc:title>
          <dc:title xml:lang="en">Dispersion of the small particles in the high turbidity water from sea sand mining boat</dc:title>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="ja">橋本, 俊也</jpcoar:creatorName>
            <jpcoar:creatorName xml:lang="en">Hashimoto, Toshiya</jpcoar:creatorName>
            <jpcoar:familyName xml:lang="ja">橋本</jpcoar:familyName>
            <jpcoar:familyName xml:lang="en">Hashimoto</jpcoar:familyName>
            <jpcoar:givenName xml:lang="ja">俊也</jpcoar:givenName>
            <jpcoar:givenName xml:lang="en">Toshiya</jpcoar:givenName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="ja">多田, 邦尚</jpcoar:creatorName>
            <jpcoar:creatorName xml:lang="en">Tada, Kuninao</jpcoar:creatorName>
            <jpcoar:familyName xml:lang="ja">多田</jpcoar:familyName>
            <jpcoar:familyName xml:lang="en">Tada</jpcoar:familyName>
            <jpcoar:givenName xml:lang="ja">邦尚</jpcoar:givenName>
            <jpcoar:givenName xml:lang="en">Kuninao</jpcoar:givenName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="ja">和田, 彩香</jpcoar:creatorName>
            <jpcoar:creatorName xml:lang="en">Wada, Sayaka</jpcoar:creatorName>
            <jpcoar:familyName xml:lang="ja">和田</jpcoar:familyName>
            <jpcoar:familyName xml:lang="en">Wada</jpcoar:familyName>
            <jpcoar:givenName xml:lang="ja">彩香</jpcoar:givenName>
            <jpcoar:givenName xml:lang="en">Sayaka</jpcoar:givenName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="ja">一見, 和彦</jpcoar:creatorName>
            <jpcoar:creatorName xml:lang="en">Ichimi, Kazuhiko</jpcoar:creatorName>
            <jpcoar:familyName xml:lang="ja">一見</jpcoar:familyName>
            <jpcoar:familyName xml:lang="en">Ichimi</jpcoar:familyName>
            <jpcoar:givenName xml:lang="ja">和彦</jpcoar:givenName>
            <jpcoar:givenName xml:lang="en">Kazuhiko</jpcoar:givenName>
          </jpcoar:creator>
          <dcterms:accessRights rdf:resource="http://purl.org/coar/access_right/c_abf2">open access</dcterms:accessRights>
          <jpcoar:subject subjectScheme="Other">海砂採取</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">拡散計算</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">透明度</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">操業間隔</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">sand mining</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">dispersion model calculation</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">Secchi disk depth</jpcoar:subject>
          <jpcoar:subject subjectScheme="Other">operation interval</jpcoar:subject>
          <jpcoar:subject subjectScheme="NDC">450</jpcoar:subject>
          <datacite:description xml:lang="ja">海砂利採取船からの高濁度排水中の微粒子の拡散状況を簡単な数値モデルで計算した。高濁度水排出地点では透明度の低下が著しいことが明らかになった。2日に一度の操業を繰り返した場合, 影響範囲は広範囲に拡がることが明らかになった。海砂採取による影響を最小限に抑えるためには, 5日以上の間隔で操業することが必要であることが示唆された。</datacite:description>
          <datacite:description xml:lang="en">The dispersion situation of the small particles in the high turbidity waters from sea sand mining boat was calculated using a simple numerical model. The transparency (Secchi disk depth) decreased remarkably near the discharge spot of high turbidity waters. When the operation of sea sand mining at intervals of two days was repeated, it was clear that the influence area of high turbidity waters spreaded widely. To suppress influence of sea sand mining in a minimum, it was suggested that the operation of sea sand mining at intervals of five days and above should be done.</datacite:description>
          <dc:publisher>広島大学大学院生物圏科学研究科</dc:publisher>
          <datacite:date dateType="Issued">2006-12-20</datacite:date>
          <dc:language>jpn</dc:language>
          <dc:type rdf:resource="http://purl.org/coar/resource_type/c_6501">departmental bulletin paper</dc:type>
          <oaire:version rdf:resource="http://purl.org/coar/version/c_970fb48d4fbd8a85">VoR</oaire:version>
          <jpcoar:identifier identifierType="DOI">https://doi.org/10.15027/30182</jpcoar:identifier>
          <jpcoar:identifier identifierType="URI">https://hiroshima.repo.nii.ac.jp/records/2023685</jpcoar:identifier>
          <jpcoar:identifierRegistration identifierType="JaLC">10.15027/30182</jpcoar:identifierRegistration>
          <jpcoar:sourceIdentifier identifierType="ISSN">1348-1371</jpcoar:sourceIdentifier>
          <jpcoar:sourceIdentifier identifierType="NCID">AA11768091</jpcoar:sourceIdentifier>
          <jpcoar:sourceTitle>生物圏科学 : 広島大学大学院生物圏科学研究科紀要</jpcoar:sourceTitle>
          <jpcoar:sourceTitle>Journal of the Graduate School of Biosphere Science, Hiroshima University</jpcoar:sourceTitle>
          <jpcoar:volume>45</jpcoar:volume>
          <jpcoar:pageStart>31</jpcoar:pageStart>
          <jpcoar:pageStart>31</jpcoar:pageStart>
          <jpcoar:pageEnd>36</jpcoar:pageEnd>
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