人民长江2024，Vol.55Issue(4)：214-221,8.DOI:10.16232/j.cnki.1001-4179.2024.04.028
基于混沌理论的非饱和土含水率预测
Prediction of unsaturated soil moisture content based on chaos theory
摘要
Abstract
To address the problem of difficulty in obtaining soil moisture content data in no data areas,we proposed a combina-tion scheme based on satellite inversion,phase space reconstruction,and unsaturated infiltration calculation.Based on the soil moisture content of the 110-day surface layer in the study area,the distribution law of soil moisture content of the surface layer and internal part in the next 100-day no data period was predicted.The calculation results show that the time series of soil mois-ture content in the study area has chaotic characteristics,which can be topologically stretched to a phase space with embedding di-mension m of 5 and delay τ of 10.The minimum relative error of the soil surface moisture content predicted by this phase space during the validation period is0.7%,the maximum relative error is2.4%,the minimum relative error during the prediction peri-od is 2.2%,and the maximum relative error is 8.3%,all of which meet the engineering requirements.Therefore,it is used as the boundary condition for subsequent unsaturated infiltration calculation,and the result is realistic and effective.Compared with tradi-tional studies,the prediction scheme proposed in this paper has dynamical characteristics and physical-mechanical meanings,which can provide a new reference for soil moisture content estimation in no data areas.关键词
土体含水率/非饱和入渗/相空间重构/混沌理论/Richards方程/非饱和土Key words
soil moisture content/unsaturated infiltration/phase space reconstruction/chaos theory/Richards equation/unsaturated soil分类
建筑与水利引用本文复制引用
朱悦璐,吴奇俞..基于混沌理论的非饱和土含水率预测[J].人民长江,2024,55(4):214-221,8.基金项目
江西省重点研发计划项目(20192BBHL80003) （20192BBHL80003）
国家自然科学基金项目(52069014) （52069014）
