WASP模型在长江航道疏浚水质模拟中的应用  

Application of WASP Model in Dredging Water Quality Simulation of the Yangtze River Channel

作　　者：刘燕婕[1,2] 姚贵泽 吕斌 LIU Yanjie;YAO Guize;LYU Bin(Center for Disease Prevention and Control of Changjiang River Administration of Navigational Affairs,Wuhan 430019,China;MOE Key Lab of Environment and Health,School of Public Health,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China)

机构地区：[1]长江航务管理局疾病预防控制中心,武汉430019 [2]华中科技大学同济医学院公共卫生学院环境与健康教育部重点实验室

出　　处：《公共卫生与预防医学》2019年第1期5-9,共5页Journal of Public Health and Preventive Medicine

基　　金：交通运输部长江航务管理局科技项目基金(201410015)

摘　　要：目的探讨WASP模型对长江航道疏浚水质模拟的合理性和实用性。方法比选WASP模型对长江中游荆江太平口航道疏浚水域溶解氧、叶绿素a、总悬浮物进行参数率定及验证和灵敏度分析。结果溶解氧、叶绿素a、总悬浮物平均模拟误差分别为0.38%、7.01%、18.65%;溶解氧模拟值在6.0～8.5mg/L之间,叶绿素a模拟值在0.5～2.6μg/L之间,总悬浮物模拟值在0～27mg/L之间,且与实测值基本吻合;灵敏度分析显示,20℃大气复氧系数对溶解氧为最灵敏参数,温度对叶绿素a为最灵敏参数,尚未发现针对总悬浮物的最灵敏参数。结论 WASP模型在长江中游荆江太平口航道疏浚水质模拟中的应用较好,可为后期疏浚水环境管理提供理论和方法依据。Objectives To explore the application of WASP model in simulation-based assessments of the water quality of dredged waters of the Yangtze River.Methods Waterway dredging is an important way to increase the navigation scale and to improve the navigation conditions.Dredging and dredging processes may cause changes in surrounding water quality and environment.Water quality based on the dissolved oxygen,chlorophyll a and total suspended solids in a Taipingkou dredging channel in the middle reaches of the Yangtze River was studied through a simulation by means of the WASP model.Results The simulation assessment showed that the average relative errors of dissolved oxygen,chlorophyll a and total suspended solids levels in the river were 0.38%,7.01%and 18.65%,respectively.The dissolved oxygen was between 6.0-8.5mg/L,chlorophyll a was between 0.5-2.6μg/L,and total suspended solids was between 0-27mg/L.These predicted values were basically consistent with the measured values.Sensitivity analysis showed that coefficient of aeration at 20℃was the most sensitive parameter of dissolved oxygen.Temperature was the most sensitive parameter of chlorophyll a.In addition,no sensitive parameters were identified in the analysis of total suspended solids while applying this modeling.These results indicated that the WASP model could satisfactorily be applied to the water quality simulation of a dredging river channel.Conclusion The WASP model provides a theoretical and methodological basis for monitoring and controlling dredging water quality.

关 键 词：WASP模型 水质模拟 参数率定 灵敏度分析 航道疏浚 

分 类 号：R123[医药卫生—环境卫生学]