發(fā)布時間：2018-04-26 04:33

  本文選題：秦皇島海域 + FBM�。� 參考：《中國環(huán)境科學》2016年08期

【摘要】：在Delft3D-FLOW模型模擬水動力的基礎上,基于FBM粒子追蹤法建立和驗證赤潮遷移擴散模型.模擬了秦皇島海域潮流和風生流,分析了風生流對赤潮遷移擴散的作用,對比分析了FBM法、拉格朗日法和常規(guī)布朗運動法在赤潮遷移擴散模擬中的特性,測試了模型Hurst指數(shù)的敏感性并得出其在赤潮模擬中的合理取值范圍.主要結(jié)論為:1秦皇島海域的赤潮主要隨潮流的漲落而往復移動,一個漲落潮周期內(nèi)赤潮的凈遷移距離較小;2秦皇島海域夏季潮流較弱,但風對赤潮遷移具有一定影響,易產(chǎn)生東北向風生流,導致赤潮更易往東北方向遷移;3Hurst指數(shù)較明顯地影響粒子云的擴散范圍,Hurst指數(shù)取0.80±0.03能比較真實地模擬秦皇島海域赤潮的遷移擴散;4FBM法可模擬赤潮的non-Fickian擴散現(xiàn)象,使其模擬的粒子云擴散范圍和分布形狀明顯優(yōu)于拉格朗日法和常規(guī)布朗運動法.
[Abstract]:Based on the hydrodynamic simulation of Delft3D-FLOW model, the red tide migration and diffusion model was established and verified by FBM particle tracing method. The effects of wind current on red tide migration and diffusion in Qinhuangdao sea area are simulated, and the characteristics of FBM method, Lagrangian method and conventional Brownian motion method in the simulation of red tide migration and diffusion are compared and analyzed. The sensitivity of the model Hurst exponent was tested and the reasonable value range of the model was obtained in the simulation of red tide. The main conclusions are as follows: the red tide in Qinhuangdao area moves back and forth with the fluctuation of tidal current, the net migration distance of red tide in a fluctuation tide period is smaller than that in Qinhuangdao Sea area, but the wind has a certain influence on the red tide migration. Easy to produce northeast wind flow, As a result, the red tide can migrate more easily to the northeast direction. The Hurst exponent of 0.80 鹵0.03 can simulate the non-Fickian diffusion of the red tide in Qinhuangdao sea area. The diffusion range and distribution shape of the simulated particle cloud are obviously superior to those of the Lagrangian method and the conventional Brownian motion method.
【作者單位】： 同濟大學土木工程學院水利工程系;廣西壯族自治區(qū)交通規(guī)劃勘察設計研究院;上海海洋大學海洋科學學院;
【基金】：國家海洋公益項目(201305003)
【分類號】：X55
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本文編號：1804516