| 大辽河口COD与DO的分布特征及其影响因素 |
| 摘要点击 2529 全文点击 1244 投稿时间：2014-03-18 修订日期：2014-05-09 |
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| 中文关键词 大辽河口 COD DO 分布特征 影响因素 |
| 英文关键词 Daliaohe Estuary COD DO distribution characteristics influencing factors |
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| 中文摘要 |
| 分别于2010年4月、7月和11月采集大辽河口表层水样，测定水体中COD与DO的含量并探讨其分布特征及影响因素. 结果表明，4月、7月和11月COD含量平均值分别为12.10、4.42和4.38 mg ·L-1，COD的季节分布主要受降雨量、径流量及工业和城市污水排放的影响. 空间分布上，COD从河口内向其邻近海域逐渐递减，而DO的变化趋势相反；COD的分布主要受河口两岸工农业及城市污水的排放和潮汐的影响. 4月、7月和11月DO含量平均值分别为8.46、4.23和10.30 mg ·L-1，DO的季节分布主要受温度和耗氧有机物的影响. 夏季在低盐度区出现了缺氧现象，这主要与营口有机物和营养盐的过度排放、潮汐作用和河口内水体停留时间长等因素有关. |
| 英文摘要 |
| The concentrations of COD and DO were measured in the Daliaohe Estuary in April, July and November of 2010, and their distribution characteristics and influencing factors were discussed. The results showed that the concentrations of COD were 12.10, 4.42 and 4.38 mg ·L-1 in April, July and November of 2010, respectively. They were mainly influenced by rainfall, runoff and municipal sewage. COD values decreased with the increasing DO from the inner of Daliaohe Estuary to adjacent waters. Spatial distribution of COD was mainly controlled by agriculture and urban sewage and tides. The concentrations of DO were 8.46, 4.23 and 10.30 mg ·L-1 in April, July and November of 2010, respectively, and were mainly influenced by temperature and oxygen consumption of organic matter. Hypoxic zone was found in the low-salinity area in summer, which was mainly controlled by excessive emission of organic matter and nutrients in Yingkou, tidal effects and long residence time of water in the estuary. |
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