{"title":"不同环境条件下恢复农业湿地停留时间分布动态的数值模拟","authors":"David Green, William Crumpton","doi":"10.2166/wst.2025.043","DOIUrl":null,"url":null,"abstract":"<p><p>This work demonstrates the development, calibration, and use of the three-dimensional Environmental Fluid Dynamics Code (EFDC) hydrodynamic and mass transport model to simulate mixing patterns and study the environmental controls on the residence time distributions of a 1.3 ha agricultural wetland in central Iowa. Incorporating time-varying flow boundary conditions and atmospheric forcing, the model was calibrated against observed state variables, including water temperatures, basin hydraulic characteristics, and dye concentrations monitored at the outlet for six tracer studies conducted under varying flow and atmospheric conditions when submersed aquatic vegetation was mostly absent from the basin. EFDC reasonably reproduced observed basin internal hydraulics, temperatures, and mass transport dynamics, with mean absolute relative errors ranging from 0.02 to 16.3%. Sensitivity analyses suggest that wind shear exerts the greatest control on the modeled, and by extension observed, RTD for this system, primarily affecting measures of short-circuiting and, to a lesser degree, basin-wide mixing, particularly in the absence of atmospheric thermal forcing. Thermal forcing was found to significantly influence short-circuiting and mixing during warmer periods, with this effect being highly influenced by wind. Transient flows nominally influenced most RTD characteristics, save for mean and median residence times.</p>","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"91 7","pages":"827-849"},"PeriodicalIF":2.5000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Numerical simulation of the residence time distribution dynamics of a restored agricultural wetland under varying environmental conditions.\",\"authors\":\"David Green, William Crumpton\",\"doi\":\"10.2166/wst.2025.043\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This work demonstrates the development, calibration, and use of the three-dimensional Environmental Fluid Dynamics Code (EFDC) hydrodynamic and mass transport model to simulate mixing patterns and study the environmental controls on the residence time distributions of a 1.3 ha agricultural wetland in central Iowa. Incorporating time-varying flow boundary conditions and atmospheric forcing, the model was calibrated against observed state variables, including water temperatures, basin hydraulic characteristics, and dye concentrations monitored at the outlet for six tracer studies conducted under varying flow and atmospheric conditions when submersed aquatic vegetation was mostly absent from the basin. EFDC reasonably reproduced observed basin internal hydraulics, temperatures, and mass transport dynamics, with mean absolute relative errors ranging from 0.02 to 16.3%. Sensitivity analyses suggest that wind shear exerts the greatest control on the modeled, and by extension observed, RTD for this system, primarily affecting measures of short-circuiting and, to a lesser degree, basin-wide mixing, particularly in the absence of atmospheric thermal forcing. Thermal forcing was found to significantly influence short-circuiting and mixing during warmer periods, with this effect being highly influenced by wind. Transient flows nominally influenced most RTD characteristics, save for mean and median residence times.</p>\",\"PeriodicalId\":23653,\"journal\":{\"name\":\"Water Science and Technology\",\"volume\":\"91 7\",\"pages\":\"827-849\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water Science and Technology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.2166/wst.2025.043\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/3/14 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.2166/wst.2025.043","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/3/14 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Numerical simulation of the residence time distribution dynamics of a restored agricultural wetland under varying environmental conditions.
This work demonstrates the development, calibration, and use of the three-dimensional Environmental Fluid Dynamics Code (EFDC) hydrodynamic and mass transport model to simulate mixing patterns and study the environmental controls on the residence time distributions of a 1.3 ha agricultural wetland in central Iowa. Incorporating time-varying flow boundary conditions and atmospheric forcing, the model was calibrated against observed state variables, including water temperatures, basin hydraulic characteristics, and dye concentrations monitored at the outlet for six tracer studies conducted under varying flow and atmospheric conditions when submersed aquatic vegetation was mostly absent from the basin. EFDC reasonably reproduced observed basin internal hydraulics, temperatures, and mass transport dynamics, with mean absolute relative errors ranging from 0.02 to 16.3%. Sensitivity analyses suggest that wind shear exerts the greatest control on the modeled, and by extension observed, RTD for this system, primarily affecting measures of short-circuiting and, to a lesser degree, basin-wide mixing, particularly in the absence of atmospheric thermal forcing. Thermal forcing was found to significantly influence short-circuiting and mixing during warmer periods, with this effect being highly influenced by wind. Transient flows nominally influenced most RTD characteristics, save for mean and median residence times.
期刊介绍:
Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.