深圳湾TIN和PO_4^(3-)-P数值模拟及减排效果分析  

Simulation and Evaluation on TIN and PO_4^(3-)-P Reduction in Deep Bay,China

作　　者：万由鹏[1,2] 毛献忠[1] 

机构地区：[1]清华大学深圳研究生院环境工程与管理研究中心,深圳518055 [2]浙江省水利河口研究院,杭州310020

出　　处：《环境科学》2011年第2期384-391,共8页Environmental Science

摘　　要：采用EFDC模型建立深圳湾三维水动力和营养盐模型,模拟总无机氮(TIN)和正磷酸盐(PO43--P)等主要营养盐在深圳湾不同水文条件下的输运规律.计算结果表明,TIN和PO34--P的计算值和实测多年月均值枯、丰水期都吻合较好.内陆河流TIN和PO43--P减排方案的计算表明,珠江口TIN提高至三类海水标准是深圳湾水体达标的前提;在珠江口三类水质条件下,不考虑降解作用,减排95%时深圳湾TIN和PO34--P基本达到三类海水水质标准功能区划的要求;考虑降解作用,减排83%时深圳湾可达到水体功能区划的要求.Environmental Fluid Dynamics Code（EFDC）,three-dimensional hydrodynamic and water quality models,are employed to simulate the transport of total inorganic nitrogen（TIN） and orthophosphate（PO4^3--P） in Deep Bay,China under different hydrologic conditions.It shows that,the computational results of TIN and PO34--P match very well with monthly-averaged field data in dry and wet seasons.The results of TIN and PO4^3--P reduction scenarios show that,it is necessary to reduce TIN concentration in Pearl River to Grade Ⅲ to guarantee TIN in Deep Bay comply with the marine functional zonation requirement of the standard of Grade Ⅲ.TIN and PO4^3--P concentrations in Deep Bay could comply with the marine functional zonation requirement if 95% TIN and PO34--P loading are reduced from the inflow when degradation ignores.When the degradation is considered,TIN could comply with the marine functional zonation requirement if 83% TIN loading are reduced from the inflow.

关 键 词：深圳湾 EFDC模型 营养盐减排 海域功能区划 

分 类 号：X145[环境科学与工程—环境科学]