永久土亚层的热水合模型,考虑温度梯度及其应用.
Jianqing Jia1, Zeqing He2, Victor O Tenorio3
1School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou, 730070, China. 19427431@qq.com.
Scientific reports
|January 13, 2025
概括
这项研究模拟了冷土壤的热水过程,并结合了温度依赖的透性. 这些发现有助于更好地预测寒冷地区道路次级的温度和湿度场,这对基础设施的弹性至关重要.
科学领域:
- 地质技术工程 地质技术工程
- 环境科学 环境科学
- 热力学是一种热力学.
背景情况:
- 冰土壤的特性对寒冷地区的基础设施至关重要.
- 土壤的透性和温度显著影响水的运动和热分布.
- 准确建模结土壤需要考虑透性的动态变化.
研究的目的:
- 为了研究土壤透系数与温度的动态变化.
- 为结土壤建立和验证水热合方程.
- 在IPCC修订的边界条件下分析寒冷地区道路地下层的温度和湿度场.
主要方法:
- 将土壤透率定义为温度的零碎函数.
- 建立一个热水合方程.
- 使用二次开发的COMSOL软件模拟土壤结过程.
- 验证模拟准确性与实验结果对比.
- 将IPCC衍生的温度边界条件应用于道路次级模型.
主要成果:
- 该模型显示了改进的准确性,特别是对于0-3厘米和8-15厘米的土壤柱高度.
- 在下层坡度的2米以内存在显著的温度梯度;温度在这个深度之外稳定,表明永久土.
- 土壤的水分含量表现出一个复杂的模式与深度,在稳定之前达到0.5米 (13%) 的峰值.
结论:
- 考虑到温度依赖的透性,可以提高冷土壤水热模拟的准确性.
- 该研究提供了对寒冷地区道路分层的热和湿度动态的见解.
- 这些发现与设计和维护永久土环境中的基础设施有关,考虑到气候变化预测.
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