STREETER-PHELPS模型的缺陷及其改进研究  

Study on the shortcoming of streeter-phelps model and its improvement

作　　者：蔡建安[1] 张文艺[1] 周志鹏[1] 吴超[1] 

机构地区：[1]安徽工业大学化工与环境学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2003年第4期295-298,321,共5页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省自然科学基金项目(01045302);安徽省教育厅重点科研项目(2001KJ039zd)

摘　　要：Streeter-Phelps模型应用于重污染河流时,因起始BOD浓度大,得出负值的氧浓度,而导致S-P模型失效。本研究比较了BOD浓度L、氧亏值D与自净系数f的关系,定义λ=fD/L为复氧判别数。λ单调递增,λ=1对应河流的复氧起点,λ<1或λ>1说明河流中的溶解氧呈下降或上升态势。通过将河流划分为三个区段,完成了BOD衰减及DO复氧过程的求解,这一改进可以有效地弥补S-P模型的缺陷。Streeter -Phelps model is failed whenever it is applied at a more polluted river,due to the high con-centration of the beginning BOD and a minus oxygen concentration produced.Based on investigation in the rela-tionship of the BOD concentration L,oxygen deficit D and cleaning coefficient f,λ=fD/L is defined as the critical number of oxygen recover.λis simply increasing downstream.λ=1is at the point where oxygen begins recover.λ<1orλ>1presents dissolved oxygen decreasing or increasing along the river.T he river is divided into three parts,the process of BOD deoxygenating and DO reaeration is totally resolved.This improvement fixed t he shortcoming efficiently at the Stre eter -Phelps model.

关 键 词：河流水质 S-P模型 BOD衰减 复氧判别数 

分 类 号：X52[环境科学与工程—环境工程] X83