湿地污染物迁移扩散数值模拟  

Numerical simulation of migration and diffusion of pollutants in wetland

作　　者：王丹丹[1] 冯民权[1] 孙小平 焦梦[1] WANG Dandan;FENG Minquan;SUN Xiaoping;JIAO Meng(State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area,Xi’an University of Technology,Xi’an 710048,China;Shanxi Province Water Resources and Hydropower Research Institute,Taiyuan 030002,China)

机构地区：[1]西安理工大学西北旱区生态水利工程国家重点实验室培育基地,陕西西安710048 [2]山西省水利水电科学研究院,山西太原030002

出　　处：《西安理工大学学报》2018年第3期314-320,共7页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51679191);山西省水利科学技术研究与推广资助项目(2014-6)

摘　　要：为研究湿地对污染物的迁移降解效果,以汾河一坝人工湿地为研究区域进行研究。基于现有自然湿地,采用湿地生态动力学模型,分析了氨氮、总磷在湿地中的迁移降解情况。通过模拟,发现污染物随水流向出口推移其浓度逐渐降低,氮磷污染物的变化规律基本一致。模拟时间3h污染物影响带到达出口,氨氮降解率为43.3%,总磷降解率为30.9%。该模型考虑了污染物的形态细致划分和转化途径,对认识污染物在湿地中的迁移规律有重要意义。To study the migration and degradation of pollutants in wetlands,the artificial wetlands of Dam No.1 of Fen River is studied.Based on the existing natural wetland conditions,the wetland ecological dynamics model is used to analyze the migration and degradation of ammonia nitrogen and total phosphorus in wetland.Through the simulation,it is found that the concentration of pollutants decreased gradually with the flow of water,and that the changes of nitrogen and phosphorus pollutants are basically the same.Pollutant influence ranges to the exit when the simulation time is 3 hours.The degradation rate of ammonia nitrogen is 43.3%and the degradation rate of total phosphorus 30.9%.The model takes into account the meticulous division and transformation of pollutants,which is of great significance to understand the migration laws of pollutants in wetlands.

关 键 词：湿地 生态动力学模型 数值模拟 

分 类 号：X52[环境科学与工程—环境工程]