Oxygen deficit determinations for a major river in eastern Hong Kong, China

被引：18

作者：

Chen, GH ^{[1
]}

Leong, IM ^{[1
]}

Liu, J ^{[1
]}

Huang, JC ^{[1
]}

Lo, IMC ^{[1
]}

Yen, BC ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Civil Engn, Kowloon, Hong Kong, Peoples R China

来源：

CHEMOSPHERE | 2000年 / 41卷 / 1-2期

关键词：

D O I：

10.1016/S0045-6535(99)00384-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Determination of oxygen deficit in the Hong Kong Shing-Mun River was based on the oxygen uptake by water, algal respiration and river sediment and the oxygen supplied to the river by surface reaeration and algal photosynthesis. A systematic study was conducted to examine the effect of water temperature, flow velocity and water depth on both the oxygen demands and the oxygen supplies. The oxygen budget of a water column in a selected section of the river was modeled. The results of the oxygen budget analysis showed that when water temperature was around 10 degrees C (the lowest temperature in the river), no deficit was observed. When water temperature was 10 degrees C to 20 degrees C, a small oxygen deficit appeared, especially in the deeper water. At the highest water temperature (30 degrees C), the oxygen deficit was maximal, -6.84 g O-2/m(2)/day, in the night-time during the Spring tide period. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：7 / 13

页数：7

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