Hypoxia over the Past Two Decades in the Ariake Sea

Lin Hao; Ai Sanada; Baixin Chi; Bing Xiong; Yasuyuki Maruya; Shinichiro Yano

doi:10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

Hypoxia over the Past Two Decades in the Ariake Sea

Lin Hao
, Ai Sanada
, Baixin Chi
, Bing Xiong
, Yasuyuki Maruya
, Shinichiro Yano

Laboratory of Hydrosphere Sutainability Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Dissolved oxygen (DO) plays a critical role in the marine ecosystem. However, in recent years, there have been reports from around the world of declining levels of DO, primarily occurring in the summer and caused by increased freshwater and nutrient input. Climate change has been causing an increase in both the duration and extent of precipitation, resulting in a substantial influx of effluents that has emerged as a primary contributor to the deterioration of water quality. In this study, A long-term pattern of hypoxia (from 2001 to 2020) in the Ariake Sea is described using a hydrodynamic model and a lower-trophic ecosystem model by Delft3D-Flow module and Delft3D-WAQ module. The freshwater inflow during the rainy season in the early summer is also evaluated to identify its relationship to the development of hypoxia and its effect at the interannual scales. From 2001 to 2020, there has been a significant increase in the area of hypoxia at the bottom sea layer after the summer effluent, indicating an upward trend that is positively correlated with the volume of effluent (R=0.67).

Original language	English
Title of host publication	Proceedings of the 40th IAHR World Congress
Editors	Helmut Habersack, Michael Tritthart, Lisa Waldenberger
Publisher	International Association for Hydro-Environment Engineering and Research
Pages	331-336
Number of pages	6
ISBN (Print)	9789083347615
DOIs	https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0142-cd
Publication status	Published - 2023
Event	40th IAHR World Congress, 2023 - Vienna, Austria Duration: Aug 21 2023 → Aug 25 2023

Publication series

Name	Proceedings of the IAHR World Congress
ISSN (Print)	2521-7119
ISSN (Electronic)	2521-716X

Conference

Conference	40th IAHR World Congress, 2023
Country/Territory	Austria
City	Vienna
Period	8/21/23 → 8/25/23

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action
SDG 14 Life Below Water
SDG 15 Life on Land

All Science Journal Classification (ASJC) codes

Engineering (miscellaneous)
Civil and Structural Engineering
Ocean Engineering
Water Science and Technology

Access to Document

10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

Cite this

Hao, L., Sanada, A., Chi, B., Xiong, B., Maruya, Y., & Yano, S. (2023). Hypoxia over the Past Two Decades in the Ariake Sea. In H. Habersack, M. Tritthart, & L. Waldenberger (Eds.), Proceedings of the 40th IAHR World Congress (pp. 331-336). (Proceedings of the IAHR World Congress). International Association for Hydro-Environment Engineering and Research. https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

Hypoxia over the Past Two Decades in the Ariake Sea. / Hao, Lin; Sanada, Ai; Chi, Baixin et al.
Proceedings of the 40th IAHR World Congress. ed. / Helmut Habersack; Michael Tritthart; Lisa Waldenberger. International Association for Hydro-Environment Engineering and Research, 2023. p. 331-336 (Proceedings of the IAHR World Congress).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hao, L, Sanada, A, Chi, B, Xiong, B, Maruya, Y & Yano, S 2023, Hypoxia over the Past Two Decades in the Ariake Sea. in H Habersack, M Tritthart & L Waldenberger (eds), Proceedings of the 40th IAHR World Congress. Proceedings of the IAHR World Congress, International Association for Hydro-Environment Engineering and Research, pp. 331-336, 40th IAHR World Congress, 2023, Vienna, Austria, 8/21/23. https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

Hao L, Sanada A, Chi B, Xiong B, Maruya Y , Yano S. Hypoxia over the Past Two Decades in the Ariake Sea. In Habersack H, Tritthart M, Waldenberger L, editors, Proceedings of the 40th IAHR World Congress. International Association for Hydro-Environment Engineering and Research. 2023. p. 331-336. (Proceedings of the IAHR World Congress). doi: 10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

@inproceedings{202d1530f5c1437eb8703210386b10be,

title = "Hypoxia over the Past Two Decades in the Ariake Sea",

abstract = "Dissolved oxygen (DO) plays a critical role in the marine ecosystem. However, in recent years, there have been reports from around the world of declining levels of DO, primarily occurring in the summer and caused by increased freshwater and nutrient input. Climate change has been causing an increase in both the duration and extent of precipitation, resulting in a substantial influx of effluents that has emerged as a primary contributor to the deterioration of water quality. In this study, A long-term pattern of hypoxia (from 2001 to 2020) in the Ariake Sea is described using a hydrodynamic model and a lower-trophic ecosystem model by Delft3D-Flow module and Delft3D-WAQ module. The freshwater inflow during the rainy season in the early summer is also evaluated to identify its relationship to the development of hypoxia and its effect at the interannual scales. From 2001 to 2020, there has been a significant increase in the area of hypoxia at the bottom sea layer after the summer effluent, indicating an upward trend that is positively correlated with the volume of effluent (R=0.67).",

author = "Lin Hao and Ai Sanada and Baixin Chi and Bing Xiong and Yasuyuki Maruya and Shinichiro Yano",

note = "Publisher Copyright: {\textcopyright} 2023 IAHR - International Association for Hydro-Environment Engineering and Research.; 40th IAHR World Congress, 2023 ; Conference date: 21-08-2023 Through 25-08-2023",

year = "2023",

doi = "10.3850/978-90-833476-1-5\_iahr40wc-p0142-cd",

language = "English",

isbn = "9789083347615",

series = "Proceedings of the IAHR World Congress",

publisher = "International Association for Hydro-Environment Engineering and Research",

pages = "331--336",

editor = "Helmut Habersack and Michael Tritthart and Lisa Waldenberger",

booktitle = "Proceedings of the 40th IAHR World Congress",

}

TY - GEN

T1 - Hypoxia over the Past Two Decades in the Ariake Sea

AU - Hao, Lin

AU - Sanada, Ai

AU - Chi, Baixin

AU - Xiong, Bing

AU - Maruya, Yasuyuki

AU - Yano, Shinichiro

PY - 2023

Y1 - 2023

N2 - Dissolved oxygen (DO) plays a critical role in the marine ecosystem. However, in recent years, there have been reports from around the world of declining levels of DO, primarily occurring in the summer and caused by increased freshwater and nutrient input. Climate change has been causing an increase in both the duration and extent of precipitation, resulting in a substantial influx of effluents that has emerged as a primary contributor to the deterioration of water quality. In this study, A long-term pattern of hypoxia (from 2001 to 2020) in the Ariake Sea is described using a hydrodynamic model and a lower-trophic ecosystem model by Delft3D-Flow module and Delft3D-WAQ module. The freshwater inflow during the rainy season in the early summer is also evaluated to identify its relationship to the development of hypoxia and its effect at the interannual scales. From 2001 to 2020, there has been a significant increase in the area of hypoxia at the bottom sea layer after the summer effluent, indicating an upward trend that is positively correlated with the volume of effluent (R=0.67).

AB - Dissolved oxygen (DO) plays a critical role in the marine ecosystem. However, in recent years, there have been reports from around the world of declining levels of DO, primarily occurring in the summer and caused by increased freshwater and nutrient input. Climate change has been causing an increase in both the duration and extent of precipitation, resulting in a substantial influx of effluents that has emerged as a primary contributor to the deterioration of water quality. In this study, A long-term pattern of hypoxia (from 2001 to 2020) in the Ariake Sea is described using a hydrodynamic model and a lower-trophic ecosystem model by Delft3D-Flow module and Delft3D-WAQ module. The freshwater inflow during the rainy season in the early summer is also evaluated to identify its relationship to the development of hypoxia and its effect at the interannual scales. From 2001 to 2020, there has been a significant increase in the area of hypoxia at the bottom sea layer after the summer effluent, indicating an upward trend that is positively correlated with the volume of effluent (R=0.67).

UR - https://www.scopus.com/pages/publications/85187685190

UR - https://www.scopus.com/pages/publications/85187685190#tab=citedBy

U2 - 10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

DO - 10.3850/978-90-833476-1-5_iahr40wc-p0142-cd

M3 - Conference contribution

AN - SCOPUS:85187685190

SN - 9789083347615

T3 - Proceedings of the IAHR World Congress

SP - 331

EP - 336

BT - Proceedings of the 40th IAHR World Congress

A2 - Habersack, Helmut

A2 - Tritthart, Michael

A2 - Waldenberger, Lisa

PB - International Association for Hydro-Environment Engineering and Research

T2 - 40th IAHR World Congress, 2023

Y2 - 21 August 2023 through 25 August 2023

ER -

Hypoxia over the Past Two Decades in the Ariake Sea

Abstract

Publication series

Conference

UN SDGs

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this