| 河道曝气提升河流水质的WASP模型研究 |
| 摘要点击 3574 全文点击 1840 投稿时间：2014-09-15 修订日期：2014-11-26 |
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| 中文关键词 河道曝气 水质模型 WASP 溶解氧 经济成本 |
| 英文关键词 river aeration water quality model WASP DO economic cost |
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| 中文摘要 |
| 曝气充氧是修复受污染河道的重要技术,数学模型是预测、评估环境污染状况的重要方法.本研究应用WASP水质模型评价不同时段河道曝气对河流水质的提升作用.初期模型验证结果表明, WASP水质模型拟合结果与实际监测结果基本吻合,可为水污染治理工程提供参考依据.在此基础上,对不同曝气条件进行模拟分析,结果表明,河道曝气能够有效降低河水中的化学需氧量(COD)和氨氮(NH4+-N)浓度,改善水质; 随着曝气河段内溶解氧(DO)水平的提升,水质虽不断改善,但改善幅度逐渐减小; 全年不同月份曝气效果差异显著, 5~9月曝气效果较好.结合经济投入和环境效益,最终确定夏季提升DO水平达到4mg ·L-1为河道曝气最优条件. |
| 英文摘要 |
| Aeration is one of the main technical methods to remediate polluted rivers, and mathematical models are the main ways to predict and assess the environmental pollution. WASP model was used to study the effect of aeration on improving the water quality of a small river over a time span. The preliminary results showed that the simulation values were consistent with practical monitoring data, which could be useful for the management and control of polluted water. Furthermore, simulations under different aeration conditions suggested that aeration technology could significantly lower the levels of chemical oxygen demand (COD) and ammonia-nitrogen (NH4+-N) of river water, thus improving the water quality. With the improvement of dissolved oxygen (DO), the water quality could be further improved. However, the increase in the removal rate of pollutants would slow down. Also, there were remarkable differences among various months throughout the whole year, and aeration from May to September had better results. Considering economic costs and environmental benefits, river aeration with a 4 mg ·L-1 DO standard in summer was determined as the best condition. |
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