水科学进展2012，Vol.23Issue(5)：709-714,6.
大辽河口存留时间和暴露时间数值模拟
Numerical study of residence time and exposure time in Daliaohe Estuary
摘要
Abstract
To study the mass transport process in an estuary, residence time and exposure time were calculated for five boxes in Daliaohe Estuary in three typical runoff conditions using a three-dimensional convection-diffusion model based on Finite-Volume Coastal Ocean Model (FVCOM). Data were obtained for both the time required to leave the control domain for the first time and the total time spent in the control domain. Then, the return coefficient and the subdomain exposure time matrix which show the interaction between boxes were also investigated. The results showed the interaction between the runoff and tides control the residence time in Daliaohe Estuary. Exposure time and residence time have the same change trendency, but they differ greatly in size. Exposure times are 8, 3 and 1 days more than residence times during dry, normal and rainy seasons, respectively. The return coefficient could reach 0.94 at the downstream end during dry season, with the tracer returning to this area many times. The downstream boxes have little influence on the upstream boxes in Daliaohe estuary except for the case in the downstream end at the maximum flood tide.关键词
物质输运/存留时间/暴露时间/数值模拟/有限体积海岸海洋模式/大辽河口Key words
mass transport/ residence time/ exposure time/ numerical simulation/ finite-volume coastal ocean model/ Daliaohe estuary分类
天文与地球科学引用本文复制引用
张学庆,王鹏程,石明珠,刘晓敏,赵骞..大辽河口存留时间和暴露时间数值模拟[J].水科学进展,2012,23(5):709-714,6.基金项目
海洋公益性行业科研专项经费资助项目(200805069) （200805069）
国家水体污染控制与治理科技重大专项(2008ZX07528-006-003) （2008ZX07528-006-003）
