SP模型缺陷及改进的研究  

The research of SP model's fault and modification

作　　者：周志鹏[1] 吴克宏[1] 蔡建安[2] 

机构地区：[1]解放军理工大学工程兵工程学院军事环境系 [2]安徽工业大学化工与环境学院

出　　处：《中国环境监测》2004年第5期54-57,共4页Environmental Monitoring in China

摘　　要：SP模型应用于高污染河流的水质分析时,因起始BOD浓度大,得出负数的DO临界值,而导致SP模型失效。本研究以BOD浓度L与自净系数f、氧亏值D乘积fD的比较为判据,分析耦合微分方程的性质及大气复氧速率之间的变化关系,通过将BOD—DO变化划分为三个阶段,完成了BOD浓度衰减及大气复氧过程的求解,这一改进可以有效弥补SP的模型缺陷。When SP model is applied in the high polluted river water quality analysis, the DO critical value may be a negative number, because of the high initial BOD value. So the previous SP model loses effectiveness. This study depends on the comparison of the BOD value L and the arithmetic product of self-purification factor f and oxygen deficit value D, analyse the relationship between the nature of couple differential equation and the rate of air complex oxygen, and divide the BOD-DO curve into 3 phases. This modification can effectively make good the former SP model's fault.

关 键 词：河流水质模型 BOD衰减 大气复氧 

分 类 号：X824[环境科学与工程—环境工程]