对用于地下水污染物运输建模的冲动响应模拟器的评估
Brent P Heerspink1, Michael N Fienen2, Howard W Reeves3
1U.S. Geological Survey, 5840 Enterprise Drive, Lansing, MI, 48911.
Ground water
|March 28, 2024
概括
这项研究表明,脉冲响应模拟可以有效地接近地下水溶液运输模型,如MODFLOW和MT3D,用于许多场景. 然而,准确性会随着高Curant数或聚焦羽毛边缘而降低.
科学领域:
- 环境科学环境科学
- 水文地质学 水文地质学
- 计算建模计算建模
背景情况:
- 准确的环境决策支持工具对于管理非点源污染至关重要.
- 地下水溶液运输模型需要计算高效的方法来评估管理策略.
研究的目的:
- 为了评估脉冲响应仿真对接近MODFLOW/MT3D溶液运输模拟的有效性.
- 为了确定脉冲响应模拟假设有效的参数空间.
主要方法:
- 使用PEST++灵敏度分析工具开发了一个冲动响应模拟器.
- 在广泛的地下水模型输入和参数中测试了模拟器.
- 将模拟器输出与MODFLOW/MT3D基于过程的模型估算进行比较.
主要成果:
- 脉冲响应模拟器对大多数测试参数准确地近似了溶解物体运输.
- 在羽毛线上观察到高百分比的错误.
- 当 Courant 数量超过 0.5.5 时,仿真精度会降低.
结论:
- 冲动响应仿真是许多情况下溶液运输建模的可行方法.
- 该方法不太适用于需要高分辨率输出或精确的低度羽毛边缘数据的应用.
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