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本文通过对城市污水纳污海区沉积物样品释放有机物的研究，初步揭示了沉积物释放耗氧有机物（ＣＯＤ）的一般规律。研究表明宁波海域沉积物释放ＣＯＤ的范围在０．１５×１０－３～０．８０×１０－３之间，释放速率平均为１０３．９ｍｇ／（ｍ２．ｄ）；舟山沈家门附近海域沉积物释放ＣＯＤ速率平均为２５３．１ｍｇ（ｍ２·ｄ）。沉积物释放ＣＯＤ的量与沉积物中有机质的含量成正比，而其释放速率与沉积物有机质的含量关系不大。
In this paper, the study on the release of organic matter from the sediment samples of urban sewage-polluted area revealed the general rules for the release of oxygen-consuming organic compounds (COD) from sediments. The results show that the COD of sediment in Ningbo area is between 0.15 × 10-3 ~ 0.80 × 10-3 and the average release rate is 103.9mg / (m2.d). Sediment near Shenjiamen, Zhoushan The average COD release rate was 253.1 mg (m2 · d). The amount of COD released by sediment is proportional to the amount of organic matter in the sediments, and the release rate is not related to the organic matter content of the sediments.