基于水环境数学模型的芜申航线对固城湖水质影响研究
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摘要
芜申航线穿越固城湖段,可能存在因监管不足、人员素质不佳、环保设施不到位等原因而产生的水污染情境,从船舶含油废水、船舶生活污水和船舶碰撞导致的危险化学品泄漏胁迫因素出发,采用二维水动力—水质数学模型预测分析各种胁迫因素在特定水文条件下对固城湖的影响。计算结果表明:(1)船舶含油废水排放威胁主要体现在沿航线两侧100 m范围的水域,油膜的最大扩散厚度约为0. 000 24 mm;(2)船舶生活污水排放威胁主要体现在航线两侧和固城湖东岸部分水域,该废水的排放将会导致固城湖饮用水源地一级保护区内水质超标;(3)船舶碰撞事故导致的危险化学品泄漏威胁短时间内主要体现在固城湖大、小湖区连接处; 24 h后影响范围将会扩大至大湖区,产生较大不利影响。
Wushen route,passing through Gucheng Lake,might impact the nearby water quality due to inadequate supervision,poor personnel quality,or lack of environmental protection facilities. Taking into consideration the stress factors of ship oily wastewater,ship domestic sewage,and dangerous chemicals that might be leaked in case of a ship collision,the paper uses a two-dimensional hydrodynamic water quality model to predict the impact of various stress factors on Gucheng Lake under specific hydrological conditions. The calculation results indicates that:( 1) the threat of wastewater discharge is mainly reflected in the waters of 100 m range along the two sides of the route with the maximum diffusion thickness of the oil film of about 0. 00024 mm;( 2) the threat of marine sewage water discharge is mainly reflected on the two sides of the route and the eastern part of the East bank of Gucheng Lake,and the discharge will lead to the excess water quality in the first grade protection area of Gucheng Lake;( 3) the threat of dangerous chemicals leakage caused by collision accidents is mainly reflected in the connection of large and small lakes for a short time; after 24 hours,the impact will be extended to the Great Lakes region,with great adverse effects.
Wushen route,passing through Gucheng Lake,might impact the nearby water quality due to inadequate supervision,poor personnel quality,or lack of environmental protection facilities. Taking into consideration the stress factors of ship oily wastewater,ship domestic sewage,and dangerous chemicals that might be leaked in case of a ship collision,the paper uses a two-dimensional hydrodynamic water quality model to predict the impact of various stress factors on Gucheng Lake under specific hydrological conditions. The calculation results indicates that:( 1) the threat of wastewater discharge is mainly reflected in the waters of 100 m range along the two sides of the route with the maximum diffusion thickness of the oil film of about 0. 00024 mm;( 2) the threat of marine sewage water discharge is mainly reflected on the two sides of the route and the eastern part of the East bank of Gucheng Lake,and the discharge will lead to the excess water quality in the first grade protection area of Gucheng Lake;( 3) the threat of dangerous chemicals leakage caused by collision accidents is mainly reflected in the connection of large and small lakes for a short time; after 24 hours,the impact will be extended to the Great Lakes region,with great adverse effects.
引文
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