Field measurements of SOD and sediment nutrient fluxes in a land-locked embayment in Hong Kong
Field measurements of SOD and sediment nutrient fluxes in a land-locked embayment in Hong Kong
复制标题
DOI：
10.1016/s1093-0191(00)00075-7
复制
发表时间：
2002-03-01
期刊：
影响因子：
--
通讯作者：
Chau, KW
中科院分区：
文献类型：
--
作者：
Chau, KW
香港的污染问题在过去20年来日益严重，而位于香港东北部、近乎封闭的吐露港的情况尤其严重。虽然溶解在上覆水中的外源有机物质已大大减少，但港口底部的软沉积物继续作为营养物的来源。此沉积物需氧量（SOD）的金额是一个显着的价值，从而增加了港口的总需氧量负荷。本文综述了水环境的现状。通过室内试验，测定了不同形态氮、磷的超氧化物歧化酶（SOD）活性及养分释放速率。实验室测定结果表明，超氧化物歧化酶（SOD）平均值为38 mg/m2·h，磷酸盐、磷和氨氮的平均释放速率分别为3 mg/m2·d和62 mg/m2·d。这些实地测量的数据将有助了解水体的水质，并提供可用于发展吐露港水质数值模型的参数。(C)2002爱思唯尔科技有限公司版权所有。
The pollution problem in Hong Kong has increased over the past two decades, and the situation in the nearly land-locked Tolo Harbour, located at the north-eastern part of the territories, has been particularly problematic. Although the exogenous organic materials dissolved in the overlying water have been substantially reduced, the soft sediments at the bottom of the harbour continue to act as sources of nutrients. This sediment oxygen demand (SOD) amounts to a significant value, hence increasing the total oxygen demand load of the harbour. In this paper, the current state of the water environment is reviewed. The SOD and the rate of nutrient release in different forms of nitrogen and phosphorus were measured in laboratory experiments. It was found from the laboratory tests that the average SOD value is 38 MgO2/m(2)-h and that the mean release rates of phosphate phosphorus and ammonia nitrogen are, respectively, 3 and 62 mg/m(2) -d. These measured field data will be useful in understanding the water quality of the water body and also provide parameters that may be used when developing numerical water quality models for Tolo Harbour. (C) 2002 Elsevier Science Ltd. All rights reserved.