| 武周虎.有限分布源与瞬时源浓度分布计算的分类准则[J].中国水利水电科学研究院学报,2018,16(1):70-78 |
| 有限分布源与瞬时源浓度分布计算的分类准则 |
| Classification criteria of concentration distribution calculation for limited distribution source and instantaneous source |
| 投稿时间：2017-07-10 |
| DOI：10.13244/j.cnki.jiwhr.2018.01.010 |
| 中文关键词: 环境水力学 有限分布源 瞬时平面源 瞬时线源 瞬时点源 分类准则 |
| 英文关键词:environmental hydraulics limited distribution source instantaneous plane source instantaneous line source instantaneous point source classification criteria |
| 基金项目:国家自然科学基金项目（51379097） |
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| 摘要点击次数: 4676 |
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| 中文摘要: |
| 从一、二、三维起始有限分布源和瞬时平面源、线源、点源相应维度扩散浓度分布的解析解出发，通过对污染物浓度分布随扩散时间变化规律的分析与比较，提出了以起始有限分布源与相应维度瞬时源扩散的最大浓度相对误差5.0%作为分类临界点；定义了Wu's数Wux、Wuy和Wuz，分别给出了一、二、三维起始有限分布源与瞬时平面源、线源、点源分类的临界Wu's数Wuk1=0.77、Wuk2=0.55、Wuk3=0.44；给出了起始有限分布源简化为瞬时平面源、线源、点源扩散的判别条件Wumax ≤ Wuki。其结果为水质模型的分类应用和水环境风险影响预测与评价，提供理论支持。 |
| 英文摘要: |
| Based on the analytical solutions of diffusion concentration distribution of the one, two and three-dimensional initial limited distribution source and the corresponding instantaneous plane, line and point source, by analyzing and comparing the law existing between pollutant concentration distribution and the variation of diffusion time,the maximum concentration relative error 5% between the initial limited distribution source and corresponding dimension instantaneous source diffusion is proposed as the critical point of classification. Wu's numbers Wux=2a/√4Dxt,Wuy=2b/√4Dyt and Wuz=2d/√4Dzt are defined. The critical Wu's numbers Wuk1=0.77, Wuk2=0.55 and Wuk3=0.44 are respectively given to classify the one, two and three-dimensional initial limited distribution source and the instantaneous plane, line and point source. Wumax ≤ Wuki is used as a criterium to judge whether initial limited distribution source can be simplified as instantaneous plane, line and point source diffusion. The results provide theoretical support for the classification and application of water quality models and the prediction and evaluation of water environmental risk impact. |
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