基于Delft3D模型的液体化工码头醋酸泄露风险数值模拟

NUMERICAL SIMULATION FOR THE RISK OF THE ACETIC ACID LEAKAGE FROM LIQUID CHEMICAL TERMINAL BASED ON DELFT3D MODEL

醋酸泄漏会使局部海水中的H+浓度增加,对邻近海域海水水质和海洋生物(浮游生物、鱼卵仔鱼、游泳动物)产生较大的影响。因此,对醋酸泄露在海水中的稀释扩散和影响范围进行预测十分必要。利用Delft3D数学模型对拟建液体化工码头醋酸溢漏2t时进行模拟,通过数值计算发现静风条件下醋酸溢漏6h后,其影响面积最大,超二类海水水质标准面积约为1.48km2。随着海水的稀释扩散,影响面积和程度逐渐减小,约24h后,不会出现超三类海水水质标准的区域。溢漏事故发生后,应立即根据事故情况采取防护对策极力防止溢出物靠近环境保护目标,从而防止或减小对环境保护目标的影响。

The leakage of acetic acid not only increases the H＋ density of the partial seawater but also will effect heavily to the seawater quality of the sea and the Marine lives （like the plankton, fish eggs and juveniles, swimming animals etc. ）. SO it＇s very necessary to do a predication to the diffusions and affections when the acetic acid leak into the sea. We use the Delft-3D mathematical model to simulate the affection after the acetic acid let out 2tons when setting up the liquid chemical terminal; Through numeric computations, we find the affected area is the biggest like the standard area of the Exceed Cate- gory II seawater quality can be around 1.48kin2 after the acetic acid leak 6 hours under the still wind. As the seawater dilution-diffusion, the affection of the area and magnitude will be reduced gradually. Around 24ours later, it won＇t appear the area of Exceed Category III seawater. Therefore after the spills, we should take some measures immediately according to the accident in order to prevent the overflow close to the environmental protection goals then reduce the affections.