{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282680124604288.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5190/tga1948.36.13"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"2980921"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/2980921"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I2980921"}},{"identifier":{"@type":"NAID","@value":"130001075093"}},{"identifier":{"@type":"NAID","@value":"10004042417"}}],"dc:title":[{"@language":"en","@value":"Geomorphological Development of Shonai Coastal Plain, Northeastern Japan"},{"@value":"庄内平野の地形発達"},{"@language":"ja-Kana","@value":"ショウナイ ヘイヤ ノ チケイ ハッタツ コウシンセイ キマツ イコウ ノ サ"}],"dcterms:alternative":[{"@language":"en","@value":"The Behavior of Alluvial Fan's Front since Latest Pleistocene"},{"@value":"更新世末期以降の砂礫分布範囲の変化"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Shonai Plain, located in the western coast of Northeastern Japan, is fed by the Mogami river and several small rivers, and margined by a large coastal sand dune. This paper intends to clarify sediment yield change during the last 12, 000 years, confirming the relationship between the movement of shoreline and that of alluvial fan's front. In order to confirm this relationship, the palaeogeography was restored based on the analysis of 758 borehole data, radiometric datings and field observations.<br>In this paper, the following method was adopted to restore the past geomorphological surface according to every sea level. Commonly, the level of alluvial fan's seaward front should take a slight elevation at every past alluvial surface (a m) was obtained as Fig. 9. The gradient of the present surface was adopted as that of line ((2)) which conbined shoreline and the seaward front of alluvial fans. By the above method, the elevation and the location of alluvial fan's seaward front according to each sea-level was estimated. The palaeogeomorphology was restored by 9 periods (Figs. 10-a-i). Shown in Fig. 8, Post-Glacial sea-level change was restored in order to estimate the age of each geomorphological map.<br>The first period (Fig. 10-a) indicates the geomorphology when the sea-level reached at about -50m (12, 000-11, 000yr B. P.). The lagoonal environment was located at the river mouth of the Mogami river. After that, the sea area (lagoon) was invading inlandward until the level reached at -15m (Fig. 10-a). After the time when the sea-level rose above -15m, the shoreline rapidly moved seaward (Figs. 10-f-h).<br>On the other hand, these palaeogeomorphological maps indicate an irregularity between the expansion of alluvial fan and the shoreline progradation. That is to say, during the period when the shoreline migrated inlandward, the alluvial fan formed by the Nikko river was expanded and the fans formed by the Akagawa and the Sasagawa rivers were not (Figs. 10-c-e). When the shoreline began to migrate seaward, the alluvial fan formed by the Sasagawa river was expanded and the fans formed by the Nikko and the Akagawa rivers were not (Figs. 10-e-f). After that, though the shoreline continued to migrate seaward, the alluvial fans front moved inlandward (Figs. 10-g-h).<br>The author assumed that the change of supplied load from each upstream area is rather effective on the expansion of alluvial fan than the shoreline progradation."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410009221365908992","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000021257004"}],"foaf:name":[{"@language":"en","@value":"ARIGA Tomoko"},{"@language":"ja","@value":"有賀 友子"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"東北大学・院"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03872777"},{"@type":"LISSN","@value":"03872777"},{"@type":"EISSN","@value":"18841244"},{"@type":"NDL_BIB_ID","@value":"000000016847"},{"@type":"ISSN","@value":"03872777"},{"@type":"NCID","@value":"AN00168742"}],"prism:publicationName":[{"@language":"ja","@value":"東北地理"},{"@language":"en","@value":"Annals of the Tohoku Geographical Association"},{"@language":"en","@value":"Annals of The Tohoku Geographycal Asocciation"},{"@language":"ja","@value":"東北地理"}],"dc:publisher":[{"@language":"en","@value":"THE TOHOKU GEOGRAPHICAL ASSOCIATION"},{"@language":"ja","@value":"東北地理学会"}],"prism:publicationDate":"1984","prism:volume":"36","prism:number":"1","prism:startingPage":"13","prism:endingPage":"24"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/2980921"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I2980921"}],"availableAt":"1984","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001204463738112","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Holocene Geomorphic Development of the Kitakami River Lowland, Northeastern Japan."},{"@value":"北上川下流沖積低地の完新世地形発達"},{"@language":"ja-Kana","@value":"キタカミガワ カリュウ チュウセキ テイチ ノ カンシンセイ チケイ ハッタツ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206240379648","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Two tsunami deposits in the Shonai Sand Dunes, northeast Japan"},{"@language":"ja","@value":"山形県庄内砂丘に挟まれる2層の古津波堆積物"},{"@language":"ja-Kana","@value":"ヤマガタケン ショウナイ サキュウ ニ ハサマレル 2ソウ ノ コ ツナミ タイセキブツ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206496695168","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Late Quaternary Activity of Matsuyama Fault in the Eastern Boundary Fault System of the Shonai Plain, Northern Japan."},{"@value":"庄内平野東縁・松山断層の断層変位地形と第四紀後期の活動性"},{"@language":"ja-Kana","@value":"タンポウ ショウナイ ヘイヤ トウエン マツヤマ ダンソウ ノ ダンソウ ヘンイ チケイ ト ダイ4キ コウキ ノ カツドウセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390025197284375040","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"STUDY OF 3D SUBSURFACE STRUCTURE MODELING METHOD USING BORING DATA AND MICROTREMORS OBSERVATIONS [Translated Paper]"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679214820352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"東日本大震災および既往地震による液状化と沖積層分布"},{"@language":"en","@value":"Distribution of Alluvium, Historic Liquefaction Sites, and Liquefaction Following the 2011 Great East Japan Earthquake"},{"@language":"ja-Kana","@value":"ヒガシニホン ダイシンサイ オヨビ キオウ ジシン ニ ヨル エキジョウカ ト チュウセキソウ ブンプ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679283081088","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"庄内平野東縁における完新世の断層活動と地震周期"},{"@language":"en","@value":"Paleoseismicity and Recurrence Intervals of Earthquakes Related to an Eastern Boundary Active Fault of the Shonai Plain, Northeast Japan"},{"@language":"ja-Kana","@value":"ショウナイ ヘイヤ トウエン ニ オケル カンシンセイ ノ ダンソウ カツドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282680401024768","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"日本における完新世の砂州地形発達"},{"@language":"en","@value":"Holocene Geomorphic Development of Coastal Barriers in Japan"},{"@language":"ja-Kana","@value":"ニホン ニ オケル カンシン セイ ノ サス チケイ ハッタツ"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0037041241"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I2980921"},{"@type":"CROSSREF","@value":"10.5190/tga1948.36.13"},{"@type":"CIA","@value":"130001075093"},{"@type":"CROSSREF","@value":"10.5575/geosoc.2016.0044_references_DOI_E9Jvw3qga8CeB4pn3ZOlndrXPwo"},{"@type":"CROSSREF","@value":"10.5026/jgeography.124.273_references_DOI_E9Jvw3qga8CeB4pn3ZOlndrXPwo"},{"@type":"CROSSREF","@value":"10.5610/jaee.25.13_34_references_DOI_E9Jvw3qga8CeB4pn3ZOlndrXPwo"}]}