Hydraulic characterization of unconfined aquifers with oscillatory excitations: A numerical analysis
نویسندگان
چکیده
We present a synthetic hydraulic analysis of the propagation oscillatory perturbations in two-dimensional saturated zone bounded above by capillary fringe. Unsaturated flows are simulated physical model using hysteretic form Richards' equation parameterized van Genuchten water retention curve and Mualem conductivity for sand, loam, intermediate soil. Soil type affects periodic responses as function their hydrodynamic properties. first analyze effect various or signal properties on at different locations depths. then test imaging potential recorded to spatially charaterize homogeneous heterogeneous soils, also considering period oscillation. find that separation these into amplitude/phase couples permits dissociate characterization Periodic amplitudes decay with distance mainly phase lags decrease frequency due storage Thus, amplitude appears be especially sensitive K, which allows isolate this property from others. Phases can used better characterize vertical effect, through Van parameters α n. Higher periods will tend accentuate unsaturated therefore adopted However, low-period useful, they provide estimates values media low heterogeneities. consider work useful preliminary future sandbox field real cases applications advices such discussion.
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ژورنال
عنوان ژورنال: Journal of Hydrology
سال: 2021
ISSN: ['2589-9155']
DOI: https://doi.org/10.1016/j.jhydrol.2021.126351