A Preliminary Analysis of Human Impacts on Sediment Discharges from the Yangtze, China, into the Sea
Sediment discharge from the Yangtze into the sea has decreased rapidly from 481.7 × 106 tons/y (1953–76) to 389.5 × 106 tons/y (1977–2000), without any corresponding decrease in water discharge. In 2001, the sediment discharge from the Yangtze dropped to 276 × 106 tons. Human activities and climate...
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| Veröffentlicht in: | Journal of coastal research 2005-05, Vol.21 (3), p.515-521 |
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| creator | Xiqing, Chen Erfeng, Zhang Hongqiang, Mu Zong, Y |
| description | Sediment discharge from the Yangtze into the sea has decreased rapidly from 481.7 × 106 tons/y (1953–76) to 389.5 × 106 tons/y (1977–2000), without any corresponding decrease in water discharge. In 2001, the sediment discharge from the Yangtze dropped to 276 × 106 tons. Human activities and climate changes obviously play a major role for reducing the sediment supply from the upper basin and for increasing the sediment sinks in the mid–lower basin. Sediment budgets in different parts of the Yangtze are estimated according to hydrometric data and other sources. Major physical and anthropogenic processes are examined with respect to their effects on sediment discharge from the Yangtze into the sea. The decrease of sediment supply (−46.8 × 106 tons/y) from the upper Yangtze in the second period accounts for about 50% of the total decrease (−92.2 × 106 tons/y) into the sea, mostly due to the increased sedimentation in reservoirs as well as climatic factors. The other 50% decrease is mostly attributed to increased sand mining in the mid–lower Yangtze and the decreased sediment supply from the Hanjiang River after building the Danjiangkou Reservoir. |
| doi_str_mv | 10.2112/03-0034.1 |
| format | Article |
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In 2001, the sediment discharge from the Yangtze dropped to 276 × 106 tons. Human activities and climate changes obviously play a major role for reducing the sediment supply from the upper basin and for increasing the sediment sinks in the mid–lower basin. Sediment budgets in different parts of the Yangtze are estimated according to hydrometric data and other sources. Major physical and anthropogenic processes are examined with respect to their effects on sediment discharge from the Yangtze into the sea. The decrease of sediment supply (−46.8 × 106 tons/y) from the upper Yangtze in the second period accounts for about 50% of the total decrease (−92.2 × 106 tons/y) into the sea, mostly due to the increased sedimentation in reservoirs as well as climatic factors. The other 50% decrease is mostly attributed to increased sand mining in the mid–lower Yangtze and the decreased sediment supply from the Hanjiang River after building the Danjiangkou Reservoir.</description><identifier>ISSN: 0749-0208</identifier><identifier>EISSN: 1551-5036</identifier><identifier>DOI: 10.2112/03-0034.1</identifier><identifier>CODEN: JCRSEK</identifier><language>eng</language><publisher>Lawrence, KS: Coastal Education and Research Foundation (CERF)</publisher><subject>Anthropogenic factors ; Brackish ; Climate change ; climate changes ; Dams ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. Geothermics ; Exact sciences and technology ; Freshwater ; Geomorphology, landform evolution ; Human influences ; Lakes ; Marine ; Marine and continental quaternary ; Pollution, environment geology ; RESEARCH PAPERS ; Reservoirs ; River basins ; Riverbeds ; Sand ; sand mining ; Sea water ; Seas ; Sediment discharge ; sediment discharge into the sea ; Sediment transport ; Sediment yield ; Sediments ; Soil erosion ; Surficial geology ; Water resources ; Yangtze River</subject><ispartof>Journal of coastal research, 2005-05, Vol.21 (3), p.515-521</ispartof><rights>Coastal Education and Research Foundation</rights><rights>Copyright 2005 The Coastal Education & Research Foundation [CERF]</rights><rights>2005 INIST-CNRS</rights><rights>Copyright Allen Press, Inc. May 2005</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a487t-b7aaf2be9fd7846ae89cf220232915699bdc187cbd6b1a1b165051cb89e040dc3</citedby><cites>FETCH-LOGICAL-a487t-b7aaf2be9fd7846ae89cf220232915699bdc187cbd6b1a1b165051cb89e040dc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://bioone.org/doi/pdf/10.2112/03-0034.1$$EPDF$$P50$$Gbioone$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4299438$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,26955,27901,27902,52338,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16819382$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Xiqing, Chen</creatorcontrib><creatorcontrib>Erfeng, Zhang</creatorcontrib><creatorcontrib>Hongqiang, Mu</creatorcontrib><creatorcontrib>Zong, Y</creatorcontrib><title>A Preliminary Analysis of Human Impacts on Sediment Discharges from the Yangtze, China, into the Sea</title><title>Journal of coastal research</title><description>Sediment discharge from the Yangtze into the sea has decreased rapidly from 481.7 × 106 tons/y (1953–76) to 389.5 × 106 tons/y (1977–2000), without any corresponding decrease in water discharge. In 2001, the sediment discharge from the Yangtze dropped to 276 × 106 tons. Human activities and climate changes obviously play a major role for reducing the sediment supply from the upper basin and for increasing the sediment sinks in the mid–lower basin. Sediment budgets in different parts of the Yangtze are estimated according to hydrometric data and other sources. Major physical and anthropogenic processes are examined with respect to their effects on sediment discharge from the Yangtze into the sea. The decrease of sediment supply (−46.8 × 106 tons/y) from the upper Yangtze in the second period accounts for about 50% of the total decrease (−92.2 × 106 tons/y) into the sea, mostly due to the increased sedimentation in reservoirs as well as climatic factors. The other 50% decrease is mostly attributed to increased sand mining in the mid–lower Yangtze and the decreased sediment supply from the Hanjiang River after building the Danjiangkou Reservoir.</description><subject>Anthropogenic factors</subject><subject>Brackish</subject><subject>Climate change</subject><subject>climate changes</subject><subject>Dams</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Engineering and environment geology. 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research</jtitle><date>2005-05-01</date><risdate>2005</risdate><volume>21</volume><issue>3</issue><spage>515</spage><epage>521</epage><pages>515-521</pages><issn>0749-0208</issn><eissn>1551-5036</eissn><coden>JCRSEK</coden><abstract>Sediment discharge from the Yangtze into the sea has decreased rapidly from 481.7 × 106 tons/y (1953–76) to 389.5 × 106 tons/y (1977–2000), without any corresponding decrease in water discharge. In 2001, the sediment discharge from the Yangtze dropped to 276 × 106 tons. Human activities and climate changes obviously play a major role for reducing the sediment supply from the upper basin and for increasing the sediment sinks in the mid–lower basin. Sediment budgets in different parts of the Yangtze are estimated according to hydrometric data and other sources. Major physical and anthropogenic processes are examined with respect to their effects on sediment discharge from the Yangtze into the sea. The decrease of sediment supply (−46.8 × 106 tons/y) from the upper Yangtze in the second period accounts for about 50% of the total decrease (−92.2 × 106 tons/y) into the sea, mostly due to the increased sedimentation in reservoirs as well as climatic factors. The other 50% decrease is mostly attributed to increased sand mining in the mid–lower Yangtze and the decreased sediment supply from the Hanjiang River after building the Danjiangkou Reservoir.</abstract><cop>Lawrence, KS</cop><pub>Coastal Education and Research Foundation (CERF)</pub><doi>10.2112/03-0034.1</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of coastal research, 2005-05, Vol.21 (3), p.515-521 |
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| subjects | Anthropogenic factors Brackish Climate change climate changes Dams Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Exact sciences and technology Freshwater Geomorphology, landform evolution Human influences Lakes Marine Marine and continental quaternary Pollution, environment geology RESEARCH PAPERS Reservoirs River basins Riverbeds Sand sand mining Sea water Seas Sediment discharge sediment discharge into the sea Sediment transport Sediment yield Sediments Soil erosion Surficial geology Water resources Yangtze River |
| title | A Preliminary Analysis of Human Impacts on Sediment Discharges from the Yangtze, China, into the Sea |
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