산샤댐 건설로 인한 북부 동중국해의 연별 해양환경 변화

Title
산샤댐 건설로 인한 북부 동중국해의 연별 해양환경 변화
Alternative Title
Annual variations of oceanographic environments in the northern East China Sea with reference to the TGD
Author(s)
최동림; 이재학; 노재훈; 유주형; 장풍국; 이태희
KIOST Author(s)
Lee, Jae Hak(이재학)Noh, Jae Hoon(노재훈)Ryu, Joo Hyung(유주형)Jang, Pung Guk(장풍국)Lee, Tae Hee(이태희)
Publication Year
2010-02-07
Abstract
The northern East China Sea ecosystem during summer has been influenced by the input of the Changjiang Dilluted Water (CDW) created from a mixture of Changjiang freshwater with seawater. About 80% of the total discharged freshwater from rivers around the Yellow and East China Seas have been supplied by the Changjiang River. The Three Gorges Dam (TGD) in the middle of the Changjiang River has been constructed until 2009 primarily for preventing flooding downstream. We examined the water mass properties of CDW, the distribution of nutrients and suspended sediments, and the effect on the lower trophic ecosystem in the northern East China Sea (ECS) during summer in 2007 to 2009. We observed that CDW moved to eastward as a patch in the northern ECS. The distribution patterns of the CDW patches were different in every summer. The concentrations of nitrate and phosphate in CDW were relatively higher than that in the surrounding water. On the contrary, silicate concentrations were low, which probably resulted from a remarkable reduction of the suspended sediments in the Changjinag River after the TGD impoundment. Phytoplankton biomass and primary production showed an increasing trend in the area of relatively strong CDW influence. This indicated that high nutrient concentrations dissolved in CDW formed a favorable condition for the growth of phytoplankton. So far as our studies indicated, CDW has obviously been responsible for the changes in marine ecosystem of the northern ECS during summer period. It is predicted that the ocean environments and their ecosystems in the ECS will be changed by controlling water flow through the TGD.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29082
Bibliographic Citation
Marine Environment in the East China Sea and its Sound Future, pp.15, 2010
Publisher
RIAM, Kyushu University & IECSR, Nagasaki University
Type
Conference
Language
English
Publisher
RIAM, Kyushu University & IECSR, Nagasaki University
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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