澳门内港水域低氧区空间分布及形成机制研究

doi:10.11978/2021019

Abstract

Abstract:

Over the years, the Macao Inner Harbor has been the most serious eutrophication area in Macao. The deterioration of water quality in the inner harbor and its adjacent waters has killed a large number of fish. Based on the statistical data of water quality monitoring in Macao in recent years, we set up the scenarios of sediment release and sewage outlet discharge, and use three-dimensional numerical simulation model to simulate the dissolved oxygen distribution characteristics and hydrodynamic processes in the region. Our research results show that the hypoxia in the inner harbor is the result of physical and biochemical oxygen consumption in the Macao sea area. There are no obvious ocean reciprocating current and water stratification in the inner harbor. The key physical mechanism of hypoxia zone formation involves the weak hydrodynamic flow in the inner harbor and the semi-enclosed water area of Fai Chi Kei, which results in pollutant retention. The biochemical oxygen consumption in the Fai Chi Kei area leads to the inner harbor hypoxia directly. The oxygen consumption of the bottom sediment further accelerates the hypoxia.

Key words: Macao inner harbor, hypoxia zone, biochemical oxygen consumption, weak hydrodynamic flow, formation mechanism

CLC Number:

U698.7

YANG Fang, JIANG Ran, YANG Liling, LIU Bingjun. Spatial characteristics and formation mechanisms of hypoxia zone in Macao Inner Harbor[J].Journal of Tropical Oceanography, 2021, 40(6): 52-62.

Figures/Tables 10

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模型设定条件	底泥耗氧	排污口
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Spatial characteristics and formation mechanisms of hypoxia zone in Macao Inner Harbor

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