适用于我国水环境管理的5X综合水量水质模型  

A 5X Comprehensive Water Quantity and Quality Model for Water Environment Management in China

作　　者：罗兰 张艳军[1] 董文逊 邱安妮 宋圆馨 佘敦先[1] LUO Lan;ZHANG Yan-jun;DONG Wen-xun;QIU An-ni;SONG Yuan-xin;SHE Dun-xian(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《中国农村水利水电》2022年第10期58-66,共9页China Rural Water and Hydropower

基　　金：国家重点研发计划“全球变化及应对”重点专项(2017YFA0603700);“山-城-河-湖-江”城市水系统综合模拟与评估(HB/ZB2021001)。

摘　　要：为解决常用综合水质模型指标体系与我国实际管理需求水质指标不一致的问题,提高实用性和易用性,以叶绿素-a的生长代谢和溶解氧的平衡为核心,综合考虑总磷、氨氮和高锰酸盐指数等5种水质组分的相互作用关系,构建了一种适用于我国水环境管理要求的5X综合水质模型,并在DEM网格下,将其与二维水动力模型耦合。以九江市八里湖为研究对象,对该模型进行了率定和验证。采用PBIAS(百分比偏差)法对水动力及水质模拟性能进行判定,结果表明该模型的水动力模拟PBIAS值为0.95%,模拟效果为优秀;溶解氧、高锰酸盐指数和总磷等几种水质组分的模拟性能为优秀,氨氮的模拟效果为良好,其他水质指标的模拟效果为满意。综合来看,该模型符合我国水环境管理的实际需求,机理明确,可用性强,结果比较准确,具有进一步发展的价值,将其应用在九江市“山-城-河-湖-江”特色城市水循环水环境综合模拟器中,取得了良好的效果。The common comprehensive water quality models have high requirements for hydrological data and water quality data,and a large amount of measured water-quality data is needed to set initial conditions and boundary conditions during simulation. In addition,their index system is inconsistent with the water quality indicator required by China’s actual management. Practical application of these models is difficult. In order to solve the problem of inconsistency between the commonly used comprehensive water-quality model index system and water quality index required by China’s actual management,and to improve its practicability and usability,focusing on the growth and metabolism of chlorophyll-a and the balance of dissolved oxygen,and comprehensively considering the interaction of five water quality components including total phosphorus,ammonia nitrogen,permanganate index and so on,a 5X comprehensive water-quality model which is suitable for water environment management requirement in China is built. This model is systematically reconstructed and generalized on the basis of QUAL-II model to reduce the data demand for initial conditions. At the same time,the comprehensive water-quality model is coupled with a two-dimensional hydrodynamic model under the DEM grid. The coupled model conforms to the geographic information system standard and has strong portability. In this paper,the finite volume method is used to discretize the model equations,and the SIMPLEC algorithm is used to solve the flow field. Finally,the tridiagonal matrix algorithm(TDMA)and the alternate direction implicit method(ADI)are used to solve the discrete equations to get numerical solution results. Taking Bali Lake in Jiujiang City as the research object,this model is calibrated and validated. The PBIAS(percentage deviation)method is used to judge the performance of hydrodynamic and water-quality simulation. The results show that the hydrodynamic simulation PBIAS value of this model is 0.95%,which has excellent simulation effect. The simulation per

关 键 词：DEM 九江模拟器 二维水动力水质模型 5X综合水质模型 水质模拟 

分 类 号：TV11[水利工程—水文学及水资源] X524[环境科学与工程—环境工程]