苏州河底泥的耗氧量

Sediment Oxygen Demand of Suzhou Creek

对苏州河底泥耗氧量（SOD）的实验测定结果表明，苏州河底泥（北新泾下游）的夏季耗氧强度是冬季的6倍，最大强度发生在武宁路河段，达7500mg/m^2·d。苏州河底泥耗氧均显示同一趋势：3-4d滞后期，经10-14d达最大值，随后下降，20-30d后维持在一较低水平。苏州河底泥COD与黄浦江底泥含量基本相当，还原性无机物耗氧是苏州河底耗氧的重要组成部分。

Determination of sediment oxygen demand (SOD) of Suzhou Creek showed that the SOD during summer was 6 times than that of winter in the lower reach below Beixinjing, whilst the highest reaching 7,500 mg/m2d at the reach of Wuning Road. The SOD of Suzhou Creek versus time revealed identical tendency: delaying for 3 - 4 days, rising up to a peak after 10 ~ 14 days and then declining, and maintaining at rather lower level after 20 - 30 days. COD content in the sediment of Suzhou Creek is basically equivalent to that in Huangpu River, and the SOD of Suzhou Creek is mainly caused by reducible inorganic substances.