一半厚度的离散格式,用于模拟可压缩延迟间隔床
Shangqi Han1,2, Chuiyu Lu3,4, Wen Lu1,2
1State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
Scientific reports
|August 11, 2025
概括
这项研究引入了一种新的半厚分离方法,用于在地下水模型中模拟可压缩的间床. 这种高效的方法显著减少了计算时间和内存使用量,同时保持了土地沉降建模的高精度.
科学领域:
- 地质科学 地质科学
- 水文地质学 水文地质学
- 计算机建模 计算建模
背景情况:
- 地面沉降模型依赖于模拟可压缩的间床.
- 现有的MODFLOW模块 (SUB和CSUB) 使用不同的方法 (头部变化与地压变化) 来进行此模拟.
- 虽然CSUB的地压变化方法对未受限制的含水层更准确,但由于全厚分离,它需要加倍的计算资源.
研究的目的:
- 开发一个更有效的模拟方法,用于可压缩延迟介面.
- 为了提高计算效率和降低基于地压力的交床模拟的内存需求.
- 为了验证一个拟议的半厚度离散格式,用于地压变化.
主要方法:
- 提出了一种基于可压缩间床的地压力线性分布的半厚离散格式.
- 通过三个具有不同参数的测试案例 (分离单位,交叉厚度,头部,液压导电) 验证了该方法.
- 将拟议的方法与CSUB模块的全厚离散方法进行比较,分析计算时间和内存使用情况.
主要成果:
- 拟议的半厚度方法实现了高精度,与CSUB模块相比,交床水释放差异小于0.4%.
- 显著的计算优势:减少了46.23%的计算时间和13.64%的内存使用量.
- 该方法利用线性地压分布来提高效率.
结论:
- 在地压变化下,拟议的半厚离散格式在地压变化下提供了一个高度准确和计算效率高的替代方案.
- 这种方法显著提高了模拟效率,并降低了模拟可压缩间床的内存需求.
- 为大规模,高精度的土地沉降建模提供了可行的技术方法.
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