Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary

Estuaries are areas where runoff and tide interact. Tidal waves propagate upstream from river mouths and produce tidal currents and tidal level variations along rivers. Based on the hydrological frequency analysis of river discharge in the dry season and flood season at the Datong hydrological stati...

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Autores principales:	Chengcheng Hou, Jianrong Zhu, Ju Huang, Xinyue Cheng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Changjiang River estuary tidal current limit tidal level limit quantitative relationship Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/d5f20568cacd45ceb060841730fdd43a
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spelling	oai:doaj.org-article:d5f20568cacd45ceb060841730fdd43a2021-11-25T18:05:08ZQuantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary10.3390/jmse91112912077-1312https://doaj.org/article/d5f20568cacd45ceb060841730fdd43a2021-11-01T00:00:00Zhttps://www.mdpi.com/2077-1312/9/11/1291https://doaj.org/toc/2077-1312Estuaries are areas where runoff and tide interact. Tidal waves propagate upstream from river mouths and produce tidal currents and tidal level variations along rivers. Based on the hydrological frequency analysis of river discharge in the dry season and flood season at the Datong hydrological station over the past 70 years, a three-dimensional estuary numerical model was used to produce the quantitative relationships between the tidal current limit, tidal level limit and river discharge in the Changjiang River estuary. The positions of tidal current limit and tidal level limit depend not only on river discharge but also on river topography. When river discharge varies from a hydrological frequency of 95% to 5%, the relationship between the tidal current limit and river discharge is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>2</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>13</mn></mrow></msup><msup><mi>x</mi><mn>3</mn></msup><mrow><mo>+</mo><mn>3</mn><mo> </mo><mo>×</mo><mo> </mo></mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mrow><mo> </mo><mn>0</mn></mrow><mrow><mo>.</mo><mn>0074</mn><mi>x</mi><mo>+</mo><mn>359</mn></mrow><mrow><mo>.</mo><mn>35</mn></mrow></mrow></semantics></math></inline-formula> in the flood season, with a variation range of 90 km, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mo>−</mo><mn>4</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup><msup><mi>x</mi><mn>3</mn></msup><mo>−</mo><mrow><mn>1</mn><mo> </mo><mo>×</mo><mo> </mo></mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>0</mn><mrow><mo>.</mo><mn>1937</mn><mi>x</mi><mo> </mo></mrow><mo>−</mo><mrow><mo> </mo><mn>1232</mn></mrow><mrow><mo>.</mo><mn>9</mn></mrow></mrow></semantics></math></inline-formula> in the dry season, with a variation range of 200 km. The relationship between the tidal level limit and river discharge is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>6</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>0</mn><mrow><mo>.</mo><mn>0096</mn><mi>x</mi><mo>+</mo><mn>775</mn></mrow><mrow><mo>.</mo><mn>94</mn></mrow></mrow></semantics></math></inline-formula> in the flood season, with a variation range of 127 km, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>0.3428</mn><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>17</mn><mrow><mo>.</mo><mn>9</mn><mi>x</mi><mo>+</mo><mn>777</mn></mrow><mrow><mo>.</mo><mn>55</mn></mrow></mrow></semantics></math></inline-formula> in the dry season, with a variation range of 83 km, which is located far upstream of the Datong hydrological station.Chengcheng HouJianrong ZhuJu HuangXinyue ChengMDPI AGarticleChangjiang River estuarytidal current limittidal level limitquantitative relationshipNaval architecture. Shipbuilding. Marine engineeringVM1-989OceanographyGC1-1581ENJournal of Marine Science and Engineering, Vol 9, Iss 1291, p 1291 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Changjiang River estuary tidal current limit tidal level limit quantitative relationship Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581
spellingShingle	Changjiang River estuary tidal current limit tidal level limit quantitative relationship Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Chengcheng Hou Jianrong Zhu Ju Huang Xinyue Cheng Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
description	Estuaries are areas where runoff and tide interact. Tidal waves propagate upstream from river mouths and produce tidal currents and tidal level variations along rivers. Based on the hydrological frequency analysis of river discharge in the dry season and flood season at the Datong hydrological station over the past 70 years, a three-dimensional estuary numerical model was used to produce the quantitative relationships between the tidal current limit, tidal level limit and river discharge in the Changjiang River estuary. The positions of tidal current limit and tidal level limit depend not only on river discharge but also on river topography. When river discharge varies from a hydrological frequency of 95% to 5%, the relationship between the tidal current limit and river discharge is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>2</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>13</mn></mrow></msup><msup><mi>x</mi><mn>3</mn></msup><mrow><mo>+</mo><mn>3</mn><mo> </mo><mo>×</mo><mo> </mo></mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mrow><mo> </mo><mn>0</mn></mrow><mrow><mo>.</mo><mn>0074</mn><mi>x</mi><mo>+</mo><mn>359</mn></mrow><mrow><mo>.</mo><mn>35</mn></mrow></mrow></semantics></math></inline-formula> in the flood season, with a variation range of 90 km, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mo>−</mo><mn>4</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup><msup><mi>x</mi><mn>3</mn></msup><mo>−</mo><mrow><mn>1</mn><mo> </mo><mo>×</mo><mo> </mo></mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>0</mn><mrow><mo>.</mo><mn>1937</mn><mi>x</mi><mo> </mo></mrow><mo>−</mo><mrow><mo> </mo><mn>1232</mn></mrow><mrow><mo>.</mo><mn>9</mn></mrow></mrow></semantics></math></inline-formula> in the dry season, with a variation range of 200 km. The relationship between the tidal level limit and river discharge is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>6</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>0</mn><mrow><mo>.</mo><mn>0096</mn><mi>x</mi><mo>+</mo><mn>775</mn></mrow><mrow><mo>.</mo><mn>94</mn></mrow></mrow></semantics></math></inline-formula> in the flood season, with a variation range of 127 km, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>y</mi><mo>=</mo><mn>0.3428</mn><msup><mi>x</mi><mn>2</mn></msup><mo>−</mo><mn>17</mn><mrow><mo>.</mo><mn>9</mn><mi>x</mi><mo>+</mo><mn>777</mn></mrow><mrow><mo>.</mo><mn>55</mn></mrow></mrow></semantics></math></inline-formula> in the dry season, with a variation range of 83 km, which is located far upstream of the Datong hydrological station.
format	article
author	Chengcheng Hou Jianrong Zhu Ju Huang Xinyue Cheng
author_facet	Chengcheng Hou Jianrong Zhu Ju Huang Xinyue Cheng
author_sort	Chengcheng Hou
title	Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
title_short	Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
title_full	Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
title_fullStr	Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
title_full_unstemmed	Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary
title_sort	quantitative relationships between the tidal current limit, tidal level limit and river discharge in the changjiang river estuary
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d5f20568cacd45ceb060841730fdd43a
work_keys_str_mv	AT chengchenghou quantitativerelationshipsbetweenthetidalcurrentlimittidallevellimitandriverdischargeinthechangjiangriverestuary AT jianrongzhu quantitativerelationshipsbetweenthetidalcurrentlimittidallevellimitandriverdischargeinthechangjiangriverestuary AT juhuang quantitativerelationshipsbetweenthetidalcurrentlimittidallevellimitandriverdischargeinthechangjiangriverestuary AT xinyuecheng quantitativerelationshipsbetweenthetidalcurrentlimittidallevellimitandriverdischargeinthechangjiangriverestuary
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Quantitative Relationships between the Tidal Current Limit, Tidal Level Limit and River Discharge in the Changjiang River Estuary

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