摘要
选取合适、高效、准确的地下水流数值模型是进行数值模拟的重要基础。利用一个完整潜水井渗流算例的水位解析解和结构化传统模型、结构化加密模型、两种非结构化加密模型的水位数值解进行比较,对其拟合程度及误差进行分析。结果表明,4种模型数值模拟的准确度均较好,平均绝对误差均小于0.1,R2均大于0.98;相较于结构化传统模型,结构化加密模型准确度最好,非结构化四级加密模型次之,非结构化三级加密模型最差;非结构化四级加密模型模拟准确度提升虽稍逊于结构化加密模型,但使用网格数量减少了90%,计算效率提升,并弥补了结构化加密模型多点加密适用性差的缺点,是一种适用性强、高效、准确的地下水流数值模型。
The selection of a suitable,efficient and accurate numerical model for groundwater flow is an important basis for numerical simulation work.The analytical solution of water level of seepage calculations of fully penetrating well in a phreatic aquifer was compared with the numerical solution of water level of structured conventional model,structured encrypted model and two unstructured encrypted models to analyze the degree of fit and error.The results show that the accuracy of the numerical simulation of all four models is quite good,and the average absolute error is less than 0.1,R~2 is greater than 0.98.Compared with the structured traditional model,the accuracy of the structured encryption model is the best,the unstructured 4-level encryption model is the second and the 3-level encryption model is the worst;The accuracy of the unstructured four-level encryption model is slightly worse than that of the structured encryption model,but the number of mesh is reduced by 90%.It is a highly applicable,efficient and accurate numerical model for groundwater flow,which improves the computational efficiency and makes up for the poor applicability of multi-point encryption of the structured encryption model.
作者
丁文华
张永祥
郭彤
贾瑞涛
DING Wen-hua;ZHANG Yong-xiang;GUO Tong;JIA Rui-tao(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《水电能源科学》
北大核心
2023年第9期32-35,共4页
Water Resources and Power
基金
国家重点研发计划(2016YFC0401404)。
关键词
数值模拟
地下水
非结构化模型
完整潜水井
numerical simulation
groundwater
unstructured model
fully penetrating well in a phreatic aquifer
