overlying water

when sediment environmental conditions changed, the heavy metal in sediment will release again and contaminate the overlying water.

当底泥环境条件发生改变时，束缚于底泥中的重金属就会重新释放污染上覆水水质。

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this indicated that benthos algae controlled by light took up phosphorus released from sediments, and thus prohibited phosphorus into the overlying water.

由此可以推断，光照对沉积物磷释放的影响主要表现为受照度控制生长的底栖藻类吸收沉积物中释放的磷，阻挡其进入上覆水中。

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variation of nitrogen and phosphorus concentration in water-sediment system and influence of overlying water on the algae growth

沉积物-水系统中氮磷变化与上覆水对藻类生长的影响

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influence of dredging on releasing pollutants from sediment to overlying water

疏浚对影响底泥向上覆水体释放污染物的研究

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The results show: the sediments can uptake phosphate from the overlying water with high mass concentration, but the rate and quantity of uptake were different in different conditions;

研究结果表明：沉积物能够吸收上覆水中高质量浓度的磷酸盐，但吸收量和吸收速度随环境条件的不同而不同；

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phosphorus fractions and vertical profiles in sediment core and overlying water of donghu lake

武汉东湖上覆水和沉积物中磷形态的垂直分布特征

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effects of overlying water properties on sorption of organic pollutants in sediments

上覆水性质对沉积物吸附有机污染物能力的影响

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for the overlying water, the index of phosphorus, nitrogen and cod also declined evidently, which had obvious effect on eutrophication control.

同时，修复样上覆水中氮、磷和COD的浓度也明显下降，对控制水体富营养化有明显效果。

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The results are described as follows: 1. The study suggests that the distribution characteristics and existing forms of nitrogen phosphorus in the overlying water and sediments of Hulun lake, indicating the phosphorus is a limited factor in eutrophication. 2.

本研究取得了如下主要认识：1.确定了呼伦湖上覆水-沉积物系统中氮、磷空间分布特征及赋存形态，并初步判定了该湖富营养化的限制因子。

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influence of dredging on self-purification ability of overlying water

疏浚对影响上覆水体自净能力的研究

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Samples of sediment, overlying water, pore water, and benthic invertebrate were collected at13 stations along a typical municipal polluted river in the Pearl River Delta.

研究区域为珠江三角洲一条典型城市污染河道，采集了13个站位沉积物、上覆水、间隙水及底栖动物样品进行分析。

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analysis on influence of sod laboratory measurement caused by different overlying water

不同上覆水对SOD实验室测定影响分析

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effects of illumination on overlying water quality and on phosphate adsorption by sediment

光照对水环境变化和沉积物吸收磷酸盐的影响

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effects of dissolved oxygen on the changes of overlying water quality and the uptake of phosphate by sediment

溶解氧对水质变化和沉积物吸磷过程的影响

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