Simplified calibration of continuous-time random walk solute transport models

被引:8
作者
Hansen, Scott K. [1 ]
机构
[1] Ben Gurion Univ Negev, Zuckerberg Inst Water Res, IL-8499000 Midreshet Ben Gurion, Israel
关键词
MULTIRATE MASS-TRANSFER; NON-FICKIAN TRANSPORT; ADVECTION-DISPERSION; HETEROGENEOUS MEDIA; MATRIX DIFFUSION; DISTRIBUTIONS; VARIABILITY; TRANSITION; AQUIFERS; BEHAVIOR;
D O I
10.1016/j.advwatres.2020.103521
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Continuous-time random walk (CTRW) models of non-Fickian solute transport are defined by a temporal pdf and three parameters: a velocity-like constant, a dispersion-like constant and a "time constant". Presently, to identify a model, all are jointly calibrated against solute breakthrough data. We show that without loss of generality the time constant can be set to unity and velocity-like and dispersion-like CTRW parameters can be set equal to well-defined classical counterparts, and thus physically pre-constrained. Thus only one entity, the pdf, requires empirical fitting during model calibration, rather than four. Our assertions are backed by numerical analysis.
引用
收藏
页数:5
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